wip

This reverts commit 48cbee08f9.

.devcontainer/devcontainer.json

@@ -5,7 +5,10 @@
 	"features": {
 		"ghcr.io/devcontainers/features/docker-in-docker:1": {},
 		"ghcr.io/devcontainers/features/dotnet": {
-			"version": "6.0.300"
+			"version": "6.0.405"
+		},
+		"ghcr.io/devcontainers/features/node:1": {
+			"version": "16"
 		}
 	},
 	"customizations": {

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,8 @@
 blank_issues_enabled: false
 contact_links:
+  - name: 🛑 Request a feature in the runner application
+    url: https://github.com/orgs/community/discussions/categories/actions-and-packages
+    about: If you have feature requests for GitHub Actions, please use the Actions and Packages section on the Github Product Feedback page.
   - name: ✅ Support for GitHub Actions
     url: https://github.community/c/code-to-cloud/52
     about: If you have questions about GitHub Actions or need support writing workflows, please ask in the GitHub Community Support forum.

.github/ISSUE_TEMPLATE/enhancement_request.md

@@ -1,32 +0,0 @@
----
-name: 🛑 Request a feature in the runner application 
-about: If you have feature requests for GitHub Actions, please use the "feedback and suggestions for GitHub Actions" link below.
-title: ''
-labels: enhancement
-assignees: ''
-
----
-
-<!--
-👋 You're opening a request for an enhancement in the GitHub Actions **runner application**.
-
-🛑 Please stop if you're not certain that the feature you want is in the runner application - if you have a suggestion for improving GitHub Actions, please see the [GitHub Actions Feedback](https://github.com/github/feedback/discussions/categories/actions-and-packages-feedback) discussion forum which is actively monitored.  Using the forum ensures that we route your problem to the correct team.  😃
-
-Some additional useful links:
-* If you have found a security issue [please submit it here](https://hackerone.com/github)
-* If you have questions or issues with the service, writing workflows or actions, then please [visit the GitHub Community Forum's Actions Board](https://github.community/t5/GitHub-Actions/bd-p/actions)
-* If you are having an issue or have a question about GitHub Actions then please [contact customer support](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/about-github-actions#contacting-support)
-
-If you have a feature request that is relevant to this repository, the runner, then please include the information below:
--->
-
-**Describe the enhancement**
-A clear and concise description of what the features or enhancement you need.
-
-**Code Snippet**
-If applicable, add a code snippet.
-
-**Additional information**
-Add any other context about the feature here.
-
-NOTE: if the feature request has been agreed upon then the assignee will create an ADR.   See docs/adrs/README.md

.github/workflows/codeql.yml

@@ -27,7 +27,7 @@ jobs:
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
+      uses: github/codeql-action/init@v2
       # Override language selection by uncommenting this and choosing your languages
       # with:
       #   languages: go, javascript, csharp, python, cpp, java
@@ -38,4 +38,4 @@ jobs:
       working-directory: src
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1
+      uses: github/codeql-action/analyze@v2

.github/workflows/lint.yml

@@ -18,7 +18,6 @@ jobs:
         uses: github/super-linter@v4
         env:
           DEFAULT_BRANCH: ${{ github.base_ref }}
-          DISABLE_ERRORS: true
           EDITORCONFIG_FILE_NAME: .editorconfig
           LINTER_RULES_PATH: /src/
           VALIDATE_ALL_CODEBASE: false

.github/workflows/release.yml

@@ -131,7 +131,7 @@ jobs:
         file=$(ls)
         sha=$(sha256sum $file | awk '{ print $1 }')
         echo "Computed sha256: $sha for $file"
-        echo "::set-output name=${{matrix.runtime}}-sha256::$sha"
+        echo "${{matrix.runtime}}-sha256=$sha" >> $GITHUB_OUTPUT
       shell: bash
       id: sha
       name: Compute SHA256
@@ -140,8 +140,8 @@ jobs:
         file=$(ls)
         sha=$(sha256sum $file | awk '{ print $1 }')
         echo "Computed sha256: $sha for $file"
-        echo "::set-output name=${{matrix.runtime}}-sha256::$sha"
+        echo "${{matrix.runtime}}-sha256=$sha" >> $GITHUB_OUTPUT
-        echo "::set-output name=sha256::$sha"
+        echo "sha256=$sha" >> $GITHUB_OUTPUT
       shell: bash
       id: sha_noexternals
       name: Compute SHA256
@@ -150,8 +150,8 @@ jobs:
         file=$(ls)
         sha=$(sha256sum $file | awk '{ print $1 }')
         echo "Computed sha256: $sha for $file"
-        echo "::set-output name=${{matrix.runtime}}-sha256::$sha"
+        echo "${{matrix.runtime}}-sha256=$sha" >> $GITHUB_OUTPUT
-        echo "::set-output name=sha256::$sha"
+        echo "sha256=$sha" >> $GITHUB_OUTPUT
       shell: bash
       id: sha_noruntime
       name: Compute SHA256
@@ -160,8 +160,8 @@ jobs:
         file=$(ls)
         sha=$(sha256sum $file | awk '{ print $1 }')
         echo "Computed sha256: $sha for $file"
-        echo "::set-output name=${{matrix.runtime}}-sha256::$sha"
+        echo "${{matrix.runtime}}-sha256=$sha" >> $GITHUB_OUTPUT
-        echo "::set-output name=sha256::$sha"
+        echo "sha256=$sha" >> $GITHUB_OUTPUT
       shell: bash
       id: sha_noruntime_noexternals
       name: Compute SHA256

docs/adrs/2494-runner-image-tags.md

@@ -0,0 +1,65 @@
+# ADR 2494: Runner Image Tags
+
+**Date**: 2023-03-17
+
+**Status**: Accepted<!-- |Accepted|Rejected|Superceded|Deprecated -->
+
+## Context
+
+Following the [adoption of actions-runner-controller by GitHub](https://github.com/actions/actions-runner-controller/discussions/2072) and the introduction of the new runner scale set autoscaling mode, we needed to provide a basic runner image that could be used off the shelf without much friction.
+
+The [current runner image](https://github.com/actions/runner/pkgs/container/actions-runner) is published to GHCR. Each release of this image is tagged with the runner version and the most recent release is also tagged with `latest`.
+
+While the use of `latest` is common practice, we recommend that users pin a specific version of the runner image for a predictable runtime and improved security posture. However, we still notice that a large number of end users are relying on the `latest` tag & raising issues when they encounter problems.
+
+Add to that, the community actions-runner-controller maintainers have issued a [deprecation notice](https://github.com/actions/actions-runner-controller/issues/2056) of the `latest` tag for the existing runner images (https://github.com/orgs/actions-runner-controller/packages).
+
+## Decision
+
+Proceed with Option 2, keeping the `latest` tag and adding the `NOTES.txt` file to our helm charts with the notice.
+
+### Option 1: Remove the `latest` tag
+
+By removing the `latest` tag, we have to proceed with either of these options:
+
+1. Remove the runner image reference in the `values.yaml` provided with the `gha-runner-scale-set` helm chart and mark these fields as required so that users have to explicitly specify a runner image and a specific tag. This will obviously introduce more  friction for users who want to start using actions-runner-controller for the first time.
+
+```yaml
+  spec:
+    containers:
+    - name: runner
+      image: ""
+      tag: ""
+      command: ["/home/runner/run.sh"]
+```
+
+1. Pin a specific runner image tag in the `values.yaml` provided with the `gha-runner-scale-set` helm chart. This will reduce friction for users who want to start using actions-runner-controller for the first time but will require us to update the `values.yaml` with every new runner release.
+
+```yaml
+  spec:
+    containers:
+    - name: runner
+      image: "ghcr.io/actions/actions-runner"
+      tag: "v2.300.0"
+      command: ["/home/runner/run.sh"]
+```
+
+### Option 2: Keep the `latest` tag
+
+Keeping the `latest` tag is also a reasonable option especially if we don't expect to make any breaking changes to the runner image. We could enhance this by adding a [NOTES.txt](https://helm.sh/docs/chart_template_guide/notes_files/) to the helm chart which will be displayed to the user after a successful helm install/upgrade. This will help users understand the implications of using the `latest` tag and how to pin a specific version of the runner image.
+
+The runner image release workflow will need to be updated so that the image is pushed to GHCR and tagged only when the runner rollout has reached all scale units.
+
+## Consequences
+
+Proceeding with **option 1** means:
+
+1. We will enhance the runtime predictability and security posture of our end users
+1. We will have to update the `values.yaml` with every new runner release (that can be automated)
+1. We will introduce friction for users who want to start using actions-runner-controller for the first time
+
+Proceeding with **option 2** means:
+
+1. We will have to continue to maintain the `latest` tag
+1. We will assume that end users will be able to handle the implications of using the `latest` tag
+1. Runner image release workflow needs to be updated 

docs/contribute.md

@@ -157,4 +157,12 @@ cat (Runner/Worker)_TIMESTAMP.log # view your log file
 ## Styling
 
 We use the .NET Foundation and CoreCLR style guidelines [located here](
-https://github.com/dotnet/corefx/blob/master/Documentation/coding-guidelines/coding-style.md)
+https://github.com/dotnet/runtime/blob/main/docs/coding-guidelines/coding-style.md)
+
+### Format C# Code
+
+To format both staged and unstaged .cs files
+```
+cd ./src
+./dev.(cmd|sh) format
+```

docs/contribute/vscode.md

@@ -35,7 +35,7 @@ All the configs below can be found in `.vscode/launch.json`.
 If you launch `Run` or `Run [build]`, it starts a process called `Runner.Listener`.
 This process will receive any job queued on this repository if the job runs on matching labels (e.g `runs-on: self-hosted`).
 Once a job is received, a `Runner.Listener` starts a new process of `Runner.Worker`.
-Since this is a diferent process, you can't use the same debugger session debug it.
+Since this is a different process, you can't use the same debugger session debug it.
 Instead, a parallel debugging session has to be started, using a different launch config.
 Luckily, VS Code supports multiple parallel debugging sessions.
 

images/Dockerfile

@@ -2,7 +2,8 @@ FROM mcr.microsoft.com/dotnet/runtime-deps:6.0 as build
 
 ARG RUNNER_VERSION
 ARG RUNNER_ARCH="x64"
-ARG RUNNER_CONTAINER_HOOKS_VERSION=0.1.3
+ARG RUNNER_CONTAINER_HOOKS_VERSION=0.3.2
+ARG DOCKER_VERSION=20.10.23
 
 RUN apt update -y && apt install curl unzip -y
 
@@ -15,10 +16,34 @@ RUN curl -f -L -o runner-container-hooks.zip https://github.com/actions/runner-c
     && unzip ./runner-container-hooks.zip -d ./k8s \
     && rm runner-container-hooks.zip
 
+RUN export DOCKER_ARCH=x86_64 \
+    && if [ "$RUNNER_ARCH" = "arm64" ]; then export DOCKER_ARCH=aarch64 ; fi \
+    && curl -fLo docker.tgz https://download.docker.com/linux/static/stable/${DOCKER_ARCH}/docker-${DOCKER_VERSION}.tgz \
+    && tar zxvf docker.tgz \
+    && rm -rf docker.tgz
+
 FROM mcr.microsoft.com/dotnet/runtime-deps:6.0
 
-ENV RUNNER_ALLOW_RUNASROOT=1
+ENV DEBIAN_FRONTEND=noninteractive
 ENV RUNNER_MANUALLY_TRAP_SIG=1
+ENV ACTIONS_RUNNER_PRINT_LOG_TO_STDOUT=1
 
-WORKDIR /actions-runner
+RUN apt-get update -y \
-COPY --from=build /actions-runner .
+    && apt-get install -y --no-install-recommends \
+    sudo \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN adduser --disabled-password --gecos "" --uid 1001 runner \
+    && groupadd docker --gid 123 \
+    && usermod -aG sudo runner \
+    && usermod -aG docker runner \
+    && echo "%sudo   ALL=(ALL:ALL) NOPASSWD:ALL" > /etc/sudoers \
+    && echo "Defaults env_keep += \"DEBIAN_FRONTEND\"" >> /etc/sudoers
+
+WORKDIR /home/runner
+
+COPY --chown=runner:docker --from=build /actions-runner .
+
+RUN install -o root -g root -m 755 docker/* /usr/bin/ && rm -rf docker
+
+USER runner

releaseNote.md

@@ -1,17 +1,22 @@
 ## Features
-- Expose github.actor_id, github.workflow_ref & github.workflow_sha as environment variable (#2249)
+- Runner changes for communication with Results service (#2510, #2531, #2535, #2516) 
-- Added worker and listener logs to stdout (#2291, #2307)
+- Add `*.ghe.localhost` domains to hosted server check (#2536) 
+- Add `OrchestrationId` to user-agent for better telemetry correlation. (#2568) 
 
 ## Bugs
-- Made github.action_status output lowercase to be consistent with job.status' output (#1944)
+- Fix JIT configurations on Windows (#2497) 
+- Guard against NullReference while creating HostContext (#2343) 
+- Handles broken symlink in `Which` (#2150, #2196) 
+- Adding curl retry for external tool downloads (#2552, #2557) 
+- Limit the time we wait for waiting websocket to connect. (#2554) 
 
 ## Misc
-- Added small size runner image for ARC (#2250)
+- Bump container hooks version to 0.3.1 in runner image (#2496) 
-- Small change to Node.js 12 deprecation message (#2262)
+- Runner changes to communicate with vNext services (#2487, #2500, #2505, #2541, #2547) 
-- Added the option to use the --replace argument to the create-latest-svc.sh (#2273)
+
-- Made runner_name optional defaulting to hostname in delete.sh script (#1871)
+_Note: Actions Runner follows a progressive release policy, so the latest release might not be available to your enterprise, organization, or repository yet. 
-- Return exit code when MANUALLY_TRAP_SIG is exported (#2285)
+To confirm which version of the Actions Runner you should expect, please view the download instructions for your enterprise, organization, or repository. 
-- Use results for uploading step summaries (#2301) with limited size (#2321)
+See https://docs.github.com/en/enterprise-cloud@latest/actions/hosting-your-own-runners/adding-self-hosted-runners_
 
 ## Windows x64
 We recommend configuring the runner in a root folder of the Windows drive (e.g. "C:\actions-runner"). This will help avoid issues related to service identity folder permissions and long file path restrictions on Windows.

releaseVersion

@@ -1 +1 @@
-2.300.1
+<Update to ./src/runnerversion when creating release>

src/Misc/contentHash/dotnetRuntime/linux-arm

@@ -1 +1 @@
-1d709d93e5d3c6c6c656a61aa6c1781050224788a05b0e6ecc4c3c0408bdf89c
+39f2a931565d6a10e695ac8ed14bb9dcbb568151410349b32dbf9c27bae29602

src/Misc/contentHash/dotnetRuntime/linux-arm64

@@ -1 +1 @@
-b92a47cfeaad02255b1f7a377060651b73ae5e5db22a188dbbcb4183ab03a03d
+29ffb303537d8ba674fbebc7729292c21c4ebd17b3198f91ed593ef4cbbb67b5

src/Misc/contentHash/dotnetRuntime/linux-x64

@@ -1 +1 @@
-68a9a8ef0843a8bb74241894f6f63fd76241a82295c5337d3cc7a940a314c78e
+de6868a836fa3cb9e5ddddbc079da1c25e819aa2d2fc193cc9931c353687c57c

src/Misc/contentHash/dotnetRuntime/osx-arm64

@@ -1 +1 @@
-02c7126ff4d63ee2a0ae390c81434c125630522aadf35903bbeebb1a99d8af99
+339d3e1a5fd28450c0fe6cb820cc7aae291f0f9e2d153ac34e1f7b080e35d30e

src/Misc/contentHash/dotnetRuntime/osx-x64

@@ -1 +1 @@
-c9d5a542f8d765168855a89e83ae0a8970d00869041c4f9a766651c04c72b212
+dcb7f606c1d7d290381e5020ee73e7f16dcbd2f20ac9b431362ccbb5120d449c

src/Misc/contentHash/dotnetRuntime/win-arm64

@@ -1 +1 @@
-39d0683f0f115a211cb10c473e9574c16549a19d4e9a6c637ded3d7022bf809f
+1bbcb0e9a2cf4be4b1fce77458de139b70ac58efcbb415a6db028b9373ae1673

src/Misc/contentHash/dotnetRuntime/win-x64

@@ -1 +1 @@
-d94f2fbaf210297162bc9f3add819d73682c3aa6899e321c3872412b924d5504
+44cd25f3c104d0abb44d262397a80e0b2c4f206465c5d899a22eec043dac0fb3

src/Misc/contentHash/externals/linux-arm

@@ -1 +1 @@
-6ed30a2c1ee403a610d63e82bb230b9ba846a9c25cec9e4ea8672fb6ed4e1a51
+3807dcbf947e840c33535fb466b096d76bf09e5c0254af8fc8cbbb24c6388222

src/Misc/contentHash/externals/linux-arm64

@@ -1 +1 @@
-711c30c51ec52c9b7a9a2eb399d6ab2ab5ee1dc72de11879f2f36f919f163d78
+ee01eee80cd8a460a4b9780ee13fdd20f25c59e754b4ccd99df55fbba2a85634

src/Misc/contentHash/externals/linux-x64

@@ -1 +1 @@
-a49479ca4b4988a06c097e8d22c51fd08a11c13f40807366236213d0e008cf6a
+a9fb9c14e24e79aec97d4da197dd7bfc6364297d6fce573afb2df48cc9a931f8

src/Misc/contentHash/externals/osx-arm64

@@ -1 +1 @@
-cc4708962a80325de0baa5ae8484e0cb9ae976ac6a4178c1c0d448b8c52bd7f7
+a4e0e8fc62eba0967a39c7d693dcd0aeb8b2bed0765f9c38df80d42884f65341

src/Misc/contentHash/externals/osx-x64

@@ -1 +1 @@
-8e97df75230b843462a9b4c578ccec604ee4b4a1066120c85b04374317fa372b
+17ac17fbe785b3d6fa2868d8d17185ebfe0c90b4b0ddf6b67eac70e42bcd989b

src/Misc/contentHash/externals/win-arm64

@@ -1 +1 @@
-e5dace2d41cc0682d096dcce4970079ad48ec7107e46195970eecfdb3df2acef
+89f24657a550f1e818b0e9975e5b80edcf4dd22b7d4bccbb9e48e37f45d30fb1

src/Misc/contentHash/externals/win-x64

@@ -1 +1 @@
-f75a671e5a188c76680739689aa75331a2c09d483dce9c80023518c48fd67a18
+24fd131b5dce33ef16038b771407bc0507da8682a72fb3b7780607235f76db0b

src/Misc/expressionFunc/hashFiles/package-lock.json

@@ -14,7 +14,7 @@
       "devDependencies": {
         "@types/node": "^12.7.12",
         "@typescript-eslint/parser": "^5.15.0",
-        "@zeit/ncc": "^0.20.5",
+        "@vercel/ncc": "^0.36.0",
         "eslint": "^8.11.0",
         "eslint-plugin-github": "^4.3.5",
         "prettier": "^1.19.1",
@@ -346,11 +346,10 @@
         "url": "https://opencollective.com/typescript-eslint"
       }
     },
-    "node_modules/@zeit/ncc": {
+    "node_modules/@vercel/ncc": {
-      "version": "0.20.5",
+      "version": "0.36.0",
-      "resolved": "https://registry.npmjs.org/@zeit/ncc/-/ncc-0.20.5.tgz",
+      "resolved": "https://registry.npmjs.org/@vercel/ncc/-/ncc-0.36.0.tgz",
-      "integrity": "sha512-XU6uzwvv95DqxciQx+aOLhbyBx/13ky+RK1y88Age9Du3BlA4mMPCy13BGjayOrrumOzlq1XV3SD/BWiZENXlw==",
+      "integrity": "sha512-/ZTUJ/ZkRt694k7KJNimgmHjtQcRuVwsST2Z6XfYveQIuBbHR+EqkTc1jfgPkQmMyk/vtpxo3nVxe8CNuau86A==",
-      "deprecated": "@zeit/ncc is no longer maintained. Please use @vercel/ncc instead.",
       "dev": true,
       "bin": {
         "ncc": "dist/ncc/cli.js"
@@ -1722,9 +1721,9 @@
       "dev": true
     },
     "node_modules/json5": {
-      "version": "1.0.1",
+      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/json5/-/json5-1.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-1.0.2.tgz",
-      "integrity": "sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==",
+      "integrity": "sha512-g1MWMLBiz8FKi1e4w0UyVL3w+iJceWAFBAaBnnGKOpNa5f8TLktkbre1+s6oICydWAm+HRUGTmI+//xv2hvXYA==",
       "dev": true,
       "dependencies": {
         "minimist": "^1.2.0"
@@ -1824,9 +1823,9 @@
       }
     },
     "node_modules/minimatch": {
-      "version": "3.0.4",
+      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
-      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
       "dependencies": {
         "brace-expansion": "^1.1.7"
       },
@@ -2747,10 +2746,10 @@
         "eslint-visitor-keys": "^3.0.0"
       }
     },
-    "@zeit/ncc": {
+    "@vercel/ncc": {
-      "version": "0.20.5",
+      "version": "0.36.0",
-      "resolved": "https://registry.npmjs.org/@zeit/ncc/-/ncc-0.20.5.tgz",
+      "resolved": "https://registry.npmjs.org/@vercel/ncc/-/ncc-0.36.0.tgz",
-      "integrity": "sha512-XU6uzwvv95DqxciQx+aOLhbyBx/13ky+RK1y88Age9Du3BlA4mMPCy13BGjayOrrumOzlq1XV3SD/BWiZENXlw==",
+      "integrity": "sha512-/ZTUJ/ZkRt694k7KJNimgmHjtQcRuVwsST2Z6XfYveQIuBbHR+EqkTc1jfgPkQmMyk/vtpxo3nVxe8CNuau86A==",
       "dev": true
     },
     "acorn": {
@@ -3756,9 +3755,9 @@
       "dev": true
     },
     "json5": {
-      "version": "1.0.1",
+      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/json5/-/json5-1.0.1.tgz",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-1.0.2.tgz",
-      "integrity": "sha512-aKS4WQjPenRxiQsC93MNfjx+nbF4PAdYzmd/1JIj8HYzqfbu86beTuNgXDzPknWk0n0uARlyewZo4s++ES36Ow==",
+      "integrity": "sha512-g1MWMLBiz8FKi1e4w0UyVL3w+iJceWAFBAaBnnGKOpNa5f8TLktkbre1+s6oICydWAm+HRUGTmI+//xv2hvXYA==",
       "dev": true,
       "requires": {
         "minimist": "^1.2.0"
@@ -3840,9 +3839,9 @@
       }
     },
     "minimatch": {
-      "version": "3.0.4",
+      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
-      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
       "requires": {
         "brace-expansion": "^1.1.7"
       }

src/Misc/expressionFunc/hashFiles/package.json

@@ -26,7 +26,7 @@
   "devDependencies": {
     "@types/node": "^12.7.12",
     "@typescript-eslint/parser": "^5.15.0",
-    "@zeit/ncc": "^0.20.5",
+    "@vercel/ncc": "^0.36.0",
     "eslint": "^8.11.0",
     "eslint-plugin-github": "^4.3.5",
     "prettier": "^1.19.1",

src/Misc/externals.sh

@@ -5,7 +5,7 @@ PRECACHE=$2
 NODE_URL=https://nodejs.org/dist
 UNOFFICIAL_NODE_URL=https://unofficial-builds.nodejs.org/download/release
 NODE12_VERSION="12.22.7"
-NODE16_VERSION="16.13.0"
+NODE16_VERSION="16.16.0"
 
 get_abs_path() {
   # exploits the fact that pwd will print abs path when no args
@@ -55,12 +55,23 @@ function acquireExternalTool() {
             # Download from source to the partial file.
             echo "Downloading $download_source"
             mkdir -p "$(dirname "$download_target")" || checkRC 'mkdir'
+
+            CURL_VERSION=$(curl --version | awk 'NR==1{print $2}')
+            echo "Curl version: $CURL_VERSION"
+
             # curl -f Fail silently (no output at all) on HTTP errors (H)
             #      -k Allow connections to SSL sites without certs (H)
             #      -S Show error. With -s, make curl show errors when they occur
             #      -L Follow redirects (H)
             #      -o FILE    Write to FILE instead of stdout
-            curl -fkSL -o "$partial_target" "$download_source" 2>"${download_target}_download.log" || checkRC 'curl'
+            #      --retry 3   Retries transient errors 3 times (timeouts, 5xx)
+            if [[ "$(printf '%s\n' "7.71.0" "$CURL_VERSION" | sort -V | head -n1)" != "7.71.0" ]]; then
+                # Curl version is less than or equal to 7.71.0, skipping retry-all-errors flag
+                 curl -fkSL --retry 3 -o "$partial_target" "$download_source" 2>"${download_target}_download.log" || checkRC 'curl'
+            else
+                # Curl version is greater than 7.71.0, running curl with --retry-all-errors flag
+                 curl -fkSL --retry 3 --retry-all-errors -o "$partial_target" "$download_source" 2>"${download_target}_download.log" || checkRC 'curl'
+            fi
 
             # Move the partial file to the download target.
             mv "$partial_target" "$download_target" || checkRC 'mv'

src/Misc/layoutbin/RunnerService.js

@@ -24,7 +24,8 @@ if (exitServiceAfterNFailures <= 0) {
   exitServiceAfterNFailures = NaN;
 }
 
-var consecutiveFailureCount = 0;
+var unknownFailureRetryCount = 0;
+var retriableFailureRetryCount = 0;
 
 var gracefulShutdown = function () {
   console.log("Shutting down runner listener");
@@ -62,7 +63,8 @@ var runService = function () {
 
       listener.stdout.on("data", (data) => {
         if (data.toString("utf8").includes("Listening for Jobs")) {
-          consecutiveFailureCount = 0;
+          unknownFailureRetryCount = 0;
+          retriableFailureRetryCount = 0;
         }
         process.stdout.write(data.toString("utf8"));
       });
@@ -92,24 +94,38 @@ var runService = function () {
           console.log(
             "Runner listener exit with retryable error, re-launch runner in 5 seconds."
           );
-          consecutiveFailureCount = 0;
+          unknownFailureRetryCount = 0;
+          retriableFailureRetryCount++;
+          if (retriableFailureRetryCount >= 10) {
+            console.error(
+              "Stopping the runner after 10 consecutive re-tryable failures"
+            );
+            stopping = true;
+          }
         } else if (code === 3 || code === 4) {
           console.log(
             "Runner listener exit because of updating, re-launch runner in 5 seconds."
           );
-          consecutiveFailureCount = 0;
+          unknownFailureRetryCount = 0;
+          retriableFailureRetryCount++;
+          if (retriableFailureRetryCount >= 10) {
+            console.error(
+              "Stopping the runner after 10 consecutive re-tryable failures"
+            );
+            stopping = true;
+          }
         } else {
           var messagePrefix = "Runner listener exit with undefined return code";
-          consecutiveFailureCount++;
+          unknownFailureRetryCount++;
+          retriableFailureRetryCount = 0;
           if (
             !isNaN(exitServiceAfterNFailures) &&
-            consecutiveFailureCount >= exitServiceAfterNFailures
+            unknownFailureRetryCount >= exitServiceAfterNFailures
           ) {
             console.error(
-              `${messagePrefix}, exiting service after ${consecutiveFailureCount} consecutive failures`
+              `${messagePrefix}, exiting service after ${unknownFailureRetryCount} consecutive failures`
             );
-            gracefulShutdown();
+            stopping = true
-            return;
           } else {
             console.log(`${messagePrefix}, re-launch runner in 5 seconds.`);
           }

src/Misc/layoutroot/run-helper.sh.template

@@ -18,6 +18,20 @@ while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symli
 done
 DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
 
+# Wait for docker to start
+if [ ! -z "$RUNNER_WAIT_FOR_DOCKER_IN_SECONDS" ]; then
+    if [ "$RUNNER_WAIT_FOR_DOCKER_IN_SECONDS" -gt 0 ]; then
+        echo "Waiting for docker to be ready."
+        for i in $(seq "$RUNNER_WAIT_FOR_DOCKER_IN_SECONDS"); do
+            if docker ps > /dev/null 2>&1; then
+                echo "Docker is ready."
+                break
+            fi
+            "$DIR"/safe_sleep.sh 1
+        done
+    fi
+fi
+
 updateFile="update.finished"
 "$DIR"/bin/Runner.Listener run $*
 

src/Misc/layoutroot/run.sh

@@ -53,6 +53,33 @@ runWithManualTrap() {
     done
 }
 
+function updateCerts() {
+    local sudo_prefix=""
+    local user_id=`id -u`
+
+    if [ $user_id -ne 0 ]; then
+        if [[ ! -x "$(command -v sudo)" ]]; then
+            echo "Warning: failed to update certificate store: sudo is required but not found"
+            return 1
+        else
+            sudo_prefix="sudo"
+        fi
+    fi
+
+    if [[ -x "$(command -v update-ca-certificates)" ]]; then
+        eval $sudo_prefix "update-ca-certificates"
+    elif [[ -x "$(command -v update-ca-trust)" ]]; then
+        eval $sudo_prefix "update-ca-trust"
+    else
+        echo "Warning: failed to update certificate store: update-ca-certificates or update-ca-trust not found. This can happen if you're using a different runner base image."
+        return 1
+    fi
+}
+
+if [[ ! -z "$RUNNER_UPDATE_CA_CERTS" ]]; then
+    updateCerts
+fi
+
 if [[ -z "$RUNNER_MANUALLY_TRAP_SIG" ]]; then
     run $*
 else

src/Misc/runnerdotnetruntimeassets

@@ -74,6 +74,7 @@ Microsoft.Win32.Registry.dll
 mscordaccore.dll
 mscordaccore_amd64_amd64_6.0.522.21309.dll
 mscordaccore_arm64_arm64_6.0.522.21309.dll
+mscordaccore_amd64_amd64_6.0.1322.58009.dll
 mscordbi.dll
 mscorlib.dll
 mscorrc.debug.dll

src/Runner.Common/BrokerServer.cs

@@ -0,0 +1,56 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Actions.RunService.WebApi;
+using GitHub.DistributedTask.Pipelines;
+using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Sdk;
+using GitHub.Services.Common;
+using Sdk.RSWebApi.Contracts;
+using Sdk.WebApi.WebApi.RawClient;
+
+namespace GitHub.Runner.Common
+{
+    [ServiceLocator(Default = typeof(BrokerServer))]
+    public interface IBrokerServer : IRunnerService
+    {
+        Task ConnectAsync(Uri serverUrl, VssCredentials credentials);
+
+        Task<TaskAgentMessage> GetRunnerMessageAsync(CancellationToken token, TaskAgentStatus status, string version);
+    }
+
+    public sealed class BrokerServer : RunnerService, IBrokerServer
+    {
+        private bool _hasConnection;
+        private Uri _brokerUri;
+        private RawConnection _connection;
+        private BrokerHttpClient _brokerHttpClient;
+
+        public async Task ConnectAsync(Uri serverUri, VssCredentials credentials)
+        {
+            _brokerUri = serverUri;
+
+            _connection = VssUtil.CreateRawConnection(serverUri, credentials);
+            _brokerHttpClient = await _connection.GetClientAsync<BrokerHttpClient>();
+            _hasConnection = true;
+        }
+
+        private void CheckConnection()
+        {
+            if (!_hasConnection)
+            {
+                throw new InvalidOperationException($"SetConnection");
+            }
+        }
+
+        public Task<TaskAgentMessage> GetRunnerMessageAsync(CancellationToken cancellationToken, TaskAgentStatus status, string version)
+        {
+            CheckConnection();
+            var jobMessage = RetryRequest<TaskAgentMessage>(
+                async () => await _brokerHttpClient.GetRunnerMessageAsync(version, status, cancellationToken), cancellationToken);
+
+            return jobMessage;
+        }
+    }
+}

src/Runner.Common/ConfigurationStore.cs

@@ -50,6 +50,12 @@ namespace GitHub.Runner.Common
         [DataMember(EmitDefaultValue = false)]
         public string MonitorSocketAddress { get; set; }
 
+        [DataMember(EmitDefaultValue = false)]
+        public bool UseV2Flow { get; set; }
+
+        [DataMember(EmitDefaultValue = false)]
+        public string ServerUrlV2 { get; set; }
+
         [IgnoreDataMember]
         public bool IsHostedServer
         {

src/Runner.Common/Constants.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 
 namespace GitHub.Runner.Common
 {
@@ -90,7 +90,6 @@ namespace GitHub.Runner.Common
                 public static class Args
                 {
                     public static readonly string Auth = "auth";
-                    public static readonly string JitConfig = "jitconfig";
                     public static readonly string Labels = "labels";
                     public static readonly string MonitorSocketAddress = "monitorsocketaddress";
                     public static readonly string Name = "name";
@@ -105,11 +104,13 @@ namespace GitHub.Runner.Common
                     public static readonly string Token = "token";
                     public static readonly string PAT = "pat";
                     public static readonly string WindowsLogonPassword = "windowslogonpassword";
+                    public static readonly string JitConfig = "jitconfig";
                     public static string[] Secrets => new[]
                     {
                         PAT,
                         Token,
                         WindowsLogonPassword,
+                        JitConfig,
                     };
                 }
 
@@ -130,6 +131,8 @@ namespace GitHub.Runner.Common
                     public static readonly string Ephemeral = "ephemeral";
                     public static readonly string GenerateServiceConfig = "generateServiceConfig";
                     public static readonly string Help = "help";
+                    public static readonly string Local = "local";
+                    public static readonly string NoDefaultLabels = "no-default-labels";
                     public static readonly string Replace = "replace";
                     public static readonly string DisableUpdate = "disableupdate";
                     public static readonly string Once = "once"; // Keep this around since customers still relies on it
@@ -157,9 +160,11 @@ namespace GitHub.Runner.Common
             }
 
             public static readonly string InternalTelemetryIssueDataKey = "_internal_telemetry";
+            public static readonly Guid TelemetryRecordId = new Guid("11111111-1111-1111-1111-111111111111");
             public static readonly string WorkerCrash = "WORKER_CRASH";
             public static readonly string LowDiskSpace = "LOW_DISK_SPACE";
             public static readonly string UnsupportedCommand = "UNSUPPORTED_COMMAND";
+            public static readonly string ResultsUploadFailure = "RESULTS_UPLOAD_FAILURE";
             public static readonly string UnsupportedCommandMessage = "The `{0}` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/";
             public static readonly string UnsupportedCommandMessageDisabled = "The `{0}` command is disabled. Please upgrade to using Environment Files or opt into unsecure command execution by setting the `ACTIONS_ALLOW_UNSECURE_COMMANDS` environment variable to `true`. For more information see: https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/";
             public static readonly string UnsupportedStopCommandTokenDisabled = "You cannot use a endToken that is an empty string, the string 'pause-logging', or another workflow command. For more information see: https://docs.github.com/actions/learn-github-actions/workflow-commands-for-github-actions#example-stopping-and-starting-workflow-commands or opt into insecure command execution by setting the `ACTIONS_ALLOW_UNSECURE_STOPCOMMAND_TOKENS` environment variable to `true`.";
@@ -257,6 +262,8 @@ namespace GitHub.Runner.Common
                 public static readonly string AccessToken = "system.accessToken";
                 public static readonly string Culture = "system.culture";
                 public static readonly string PhaseDisplayName = "system.phaseDisplayName";
+                public static readonly string JobRequestType = "system.jobRequestType";
+                public static readonly string OrchestrationId = "system.orchestrationId";
             }
         }
 

src/Runner.Common/HostContext.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Diagnostics;
@@ -220,12 +220,26 @@ namespace GitHub.Runner.Common
             var runnerFile = GetConfigFile(WellKnownConfigFile.Runner);
             if (File.Exists(runnerFile))
             {
-                var runnerSettings = IOUtil.LoadObject<RunnerSettings>(runnerFile);
+                var runnerSettings = IOUtil.LoadObject<RunnerSettings>(runnerFile, true);
                 _userAgents.Add(new ProductInfoHeaderValue("RunnerId", runnerSettings.AgentId.ToString(CultureInfo.InvariantCulture)));
                 _userAgents.Add(new ProductInfoHeaderValue("GroupId", runnerSettings.PoolId.ToString(CultureInfo.InvariantCulture)));
             }
 
             _userAgents.Add(new ProductInfoHeaderValue("CommitSHA", BuildConstants.Source.CommitHash));
+
+            var extraUserAgent = Environment.GetEnvironmentVariable("GITHUB_ACTIONS_RUNNER_EXTRA_USER_AGENT");
+            if (!string.IsNullOrEmpty(extraUserAgent))
+            {
+                var extraUserAgentSplit = extraUserAgent.Split('/', StringSplitOptions.RemoveEmptyEntries);
+                if (extraUserAgentSplit.Length != 2)
+                {
+                    _trace.Error($"GITHUB_ACTIONS_RUNNER_EXTRA_USER_AGENT is not in the format of 'name/version'.");
+                }
+
+                var extraUserAgentHeader = new ProductInfoHeaderValue(extraUserAgentSplit[0], extraUserAgentSplit[1]);
+                _trace.Info($"Adding extra user agent '{extraUserAgentHeader}' to all HTTP requests.");
+                _userAgents.Add(extraUserAgentHeader);
+            }
         }
 
         public string GetDirectory(WellKnownDirectory directory)

src/Runner.Common/JobServer.cs

@@ -11,10 +11,10 @@ using System.Threading.Tasks;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Sdk;
 using GitHub.Services.Common;
+using GitHub.Services.OAuth;
+using GitHub.Services.Results.Client;
 using GitHub.Services.WebApi;
 using GitHub.Services.WebApi.Utilities.Internal;
-using GitHub.Services.Results.Client;
-using GitHub.Services.OAuth;
 
 namespace GitHub.Runner.Common
 {
@@ -24,13 +24,11 @@ namespace GitHub.Runner.Common
         Task ConnectAsync(VssConnection jobConnection);
 
         void InitializeWebsocketClient(ServiceEndpoint serviceEndpoint);
-        void InitializeResultsClient(Uri uri, string token);
 
         // logging and console
         Task<TaskLog> AppendLogContentAsync(Guid scopeIdentifier, string hubName, Guid planId, int logId, Stream uploadStream, CancellationToken cancellationToken);
         Task AppendTimelineRecordFeedAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, Guid stepId, IList<string> lines, long? startLine, CancellationToken cancellationToken);
         Task<TaskAttachment> CreateAttachmentAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, String type, String name, Stream uploadStream, CancellationToken cancellationToken);
-        Task CreateStepSymmaryAsync(string planId, string jobId, string stepId, string file, CancellationToken cancellationToken);
         Task<TaskLog> CreateLogAsync(Guid scopeIdentifier, string hubName, Guid planId, TaskLog log, CancellationToken cancellationToken);
         Task<Timeline> CreateTimelineAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, CancellationToken cancellationToken);
         Task<List<TimelineRecord>> UpdateTimelineRecordsAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, IEnumerable<TimelineRecord> records, CancellationToken cancellationToken);
@@ -44,7 +42,6 @@ namespace GitHub.Runner.Common
         private bool _hasConnection;
         private VssConnection _connection;
         private TaskHttpClient _taskClient;
-        private ResultsHttpClient _resultsClient;
         private ClientWebSocket _websocketClient;
 
         private ServiceEndpoint _serviceEndpoint;
@@ -148,12 +145,6 @@ namespace GitHub.Runner.Common
             InitializeWebsocketClient(TimeSpan.Zero);
         }
 
-        public void InitializeResultsClient(Uri uri, string token)
-        {
-            var httpMessageHandler = HostContext.CreateHttpClientHandler();
-            this._resultsClient = new ResultsHttpClient(uri, httpMessageHandler, token, disposeHandler: true);
-        }
-
         public ValueTask DisposeAsync()
         {
             CloseWebSocket(WebSocketCloseStatus.NormalClosure, CancellationToken.None);
@@ -208,13 +199,15 @@ namespace GitHub.Runner.Common
             {
                 Trace.Info($"Attempting to start websocket client with delay {delay}.");
                 await Task.Delay(delay);
-                await this._websocketClient.ConnectAsync(new Uri(feedStreamUrl), default(CancellationToken));
+                using var connectTimeoutTokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(30));
+                await this._websocketClient.ConnectAsync(new Uri(feedStreamUrl), connectTimeoutTokenSource.Token);
                 Trace.Info($"Successfully started websocket client.");
             }
             catch (Exception ex)
             {
                 Trace.Info("Exception caught during websocket client connect, fallback of HTTP would be used now instead of websocket.");
                 Trace.Error(ex);
+                this._websocketClient = null;
             }
         }
 
@@ -261,7 +254,7 @@ namespace GitHub.Runner.Common
                 {
                     failedAttemptsToPostBatchedLinesByWebsocket++;
                     Trace.Info($"Caught exception during append web console line to websocket, let's fallback to sending via non-websocket call (total calls: {totalBatchedLinesAttemptedByWebsocket}, failed calls: {failedAttemptsToPostBatchedLinesByWebsocket}, websocket state: {this._websocketClient?.State}).");
-                    Trace.Error(ex);
+                    Trace.Verbose(ex.ToString());
                     if (totalBatchedLinesAttemptedByWebsocket > _minWebsocketBatchedLinesCountToConsider)
                     {
                         // let's consider failure percentage
@@ -316,15 +309,6 @@ namespace GitHub.Runner.Common
             return _taskClient.CreateAttachmentAsync(scopeIdentifier, hubName, planId, timelineId, timelineRecordId, type, name, uploadStream, cancellationToken: cancellationToken);
         }
 
-        public Task CreateStepSymmaryAsync(string planId, string jobId, string stepId, string file, CancellationToken cancellationToken)
-        {
-            if (_resultsClient != null)
-            {
-                return _resultsClient.UploadStepSummaryAsync(planId, jobId, stepId, file, cancellationToken: cancellationToken);
-            }
-            throw new InvalidOperationException("Results client is not initialized.");
-        }
-
 
         public Task<TaskLog> CreateLogAsync(Guid scopeIdentifier, string hubName, Guid planId, TaskLog log, CancellationToken cancellationToken)
         {

src/Runner.Common/JobServerQueue.cs

@@ -17,10 +17,10 @@ namespace GitHub.Runner.Common
         TaskCompletionSource<int> JobRecordUpdated { get; }
         event EventHandler<ThrottlingEventArgs> JobServerQueueThrottling;
         Task ShutdownAsync();
-        void Start(Pipelines.AgentJobRequestMessage jobRequest);
+        void Start(Pipelines.AgentJobRequestMessage jobRequest, bool resultServiceOnly = false);
         void QueueWebConsoleLine(Guid stepRecordId, string line, long? lineNumber = null);
         void QueueFileUpload(Guid timelineId, Guid timelineRecordId, string type, string name, string path, bool deleteSource);
-        void QueueSummaryUpload(Guid timelineId, Guid timelineRecordId, string stepId, string name, string path, bool deleteSource);
+        void QueueResultsUpload(Guid timelineRecordId, string name, string path, string type, bool deleteSource, bool finalize, bool firstBlock, long totalLines);
         void QueueTimelineRecordUpdate(Guid timelineId, TimelineRecord timelineRecord);
     }
 
@@ -31,7 +31,7 @@ namespace GitHub.Runner.Common
         private static readonly TimeSpan _delayForWebConsoleLineDequeue = TimeSpan.FromMilliseconds(500);
         private static readonly TimeSpan _delayForTimelineUpdateDequeue = TimeSpan.FromMilliseconds(500);
         private static readonly TimeSpan _delayForFileUploadDequeue = TimeSpan.FromMilliseconds(1000);
-        private static readonly TimeSpan _delayForSummaryUploadDequeue = TimeSpan.FromMilliseconds(1000);
+        private static readonly TimeSpan _delayForResultsUploadDequeue = TimeSpan.FromMilliseconds(1000);
 
         // Job message information
         private Guid _scopeIdentifier;
@@ -46,7 +46,7 @@ namespace GitHub.Runner.Common
         // queue for file upload (log file or attachment)
         private readonly ConcurrentQueue<UploadFileInfo> _fileUploadQueue = new();
 
-        private readonly ConcurrentQueue<SummaryUploadFileInfo> _summaryFileUploadQueue = new();
+        private readonly ConcurrentQueue<ResultsUploadFileInfo> _resultsFileUploadQueue = new();
 
         // queue for timeline or timeline record update (one queue per timeline)
         private readonly ConcurrentDictionary<Guid, ConcurrentQueue<TimelineRecord>> _timelineUpdateQueue = new();
@@ -60,15 +60,17 @@ namespace GitHub.Runner.Common
         // Task for each queue's dequeue process
         private Task _webConsoleLineDequeueTask;
         private Task _fileUploadDequeueTask;
-        private Task _summaryUploadDequeueTask;
+        private Task _resultsUploadDequeueTask;
         private Task _timelineUpdateDequeueTask;
 
         // common
         private IJobServer _jobServer;
+        private IResultsServer _resultsServer;
         private Task[] _allDequeueTasks;
         private readonly TaskCompletionSource<int> _jobCompletionSource = new();
         private readonly TaskCompletionSource<int> _jobRecordUpdated = new();
         private bool _queueInProcess = false;
+        private bool _resultsServiceOnly = false;
 
         public TaskCompletionSource<int> JobRecordUpdated => _jobRecordUpdated;
 
@@ -84,19 +86,27 @@ namespace GitHub.Runner.Common
         private bool _webConsoleLineAggressiveDequeue = true;
         private bool _firstConsoleOutputs = true;
 
+        private bool _resultsClientInitiated = false;
+        private delegate Task ResultsFileUploadHandler(ResultsUploadFileInfo file);
+
         public override void Initialize(IHostContext hostContext)
         {
             base.Initialize(hostContext);
             _jobServer = hostContext.GetService<IJobServer>();
+            _resultsServer = hostContext.GetService<IResultsServer>();
         }
 
-        public void Start(Pipelines.AgentJobRequestMessage jobRequest)
+        public void Start(Pipelines.AgentJobRequestMessage jobRequest, bool resultServiceOnly = false)
         {
             Trace.Entering();
+            _resultsServiceOnly = resultServiceOnly;
 
             var serviceEndPoint = jobRequest.Resources.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
 
-            _jobServer.InitializeWebsocketClient(serviceEndPoint);
+            if (!resultServiceOnly)
+            {
+                _jobServer.InitializeWebsocketClient(serviceEndPoint);
+            }
 
             // This code is usually wrapped by an instance of IExecutionContext which isn't available here.
             jobRequest.Variables.TryGetValue("system.github.results_endpoint", out VariableValue resultsEndpointVariable);
@@ -107,10 +117,18 @@ namespace GitHub.Runner.Common
                 !string.IsNullOrEmpty(accessToken) &&
                 !string.IsNullOrEmpty(resultsReceiverEndpoint))
             {
+                string liveConsoleFeedUrl = null;
                 Trace.Info("Initializing results client");
-                _jobServer.InitializeResultsClient(new Uri(resultsReceiverEndpoint), accessToken);
+                if (resultServiceOnly
-            }
+                    && serviceEndPoint.Data.TryGetValue("FeedStreamUrl", out var feedStreamUrl)
+                    && !string.IsNullOrEmpty(feedStreamUrl))
+                {
+                    liveConsoleFeedUrl = feedStreamUrl;
+                }
 
+                _resultsServer.InitializeResultsClient(new Uri(resultsReceiverEndpoint), liveConsoleFeedUrl, accessToken);
+                _resultsClientInitiated = true;
+            }
 
             if (_queueInProcess)
             {
@@ -140,12 +158,12 @@ namespace GitHub.Runner.Common
             _fileUploadDequeueTask = ProcessFilesUploadQueueAsync();
 
             Trace.Info("Start results file upload queue.");
-            _summaryUploadDequeueTask = ProcessSummaryUploadQueueAsync();
+            _resultsUploadDequeueTask = ProcessResultsUploadQueueAsync();
 
             Trace.Info("Start process timeline update queue.");
             _timelineUpdateDequeueTask = ProcessTimelinesUpdateQueueAsync();
 
-            _allDequeueTasks = new Task[] { _webConsoleLineDequeueTask, _fileUploadDequeueTask, _timelineUpdateDequeueTask, _summaryUploadDequeueTask };
+            _allDequeueTasks = new Task[] { _webConsoleLineDequeueTask, _fileUploadDequeueTask, _timelineUpdateDequeueTask, _resultsUploadDequeueTask };
             _queueInProcess = true;
         }
 
@@ -176,9 +194,9 @@ namespace GitHub.Runner.Common
             await ProcessFilesUploadQueueAsync(runOnce: true);
             Trace.Info("File upload queue drained.");
 
-            Trace.Verbose("Draining results summary upload queue.");
+            Trace.Verbose("Draining results upload queue.");
-            await ProcessSummaryUploadQueueAsync(runOnce: true);
+            await ProcessResultsUploadQueueAsync(runOnce: true);
-            Trace.Info("Results summary upload queue drained.");
+            Trace.Info("Results upload queue drained.");
 
             // ProcessTimelinesUpdateQueueAsync() will throw exception during shutdown
             // if there is any timeline records that failed to update contains output variabls.
@@ -189,6 +207,9 @@ namespace GitHub.Runner.Common
             Trace.Info($"Disposing job server ...");
             await _jobServer.DisposeAsync();
 
+            Trace.Info($"Disposing results server ...");
+            await _resultsServer.DisposeAsync();
+
             Trace.Info("All queue process tasks have been stopped, and all queues are drained.");
         }
 
@@ -230,26 +251,43 @@ namespace GitHub.Runner.Common
             _fileUploadQueue.Enqueue(newFile);
         }
 
-        public void QueueSummaryUpload(Guid timelineId, Guid timelineRecordId, string stepId, string name, string path, bool deleteSource)
+        public void QueueResultsUpload(Guid timelineRecordId, string name, string path, string type, bool deleteSource, bool finalize, bool firstBlock, long totalLines)
         {
-            ArgUtil.NotEmpty(timelineId, nameof(timelineId));
+            if (!_resultsClientInitiated)
-            ArgUtil.NotEmpty(timelineRecordId, nameof(timelineRecordId));
+            {
+                Trace.Verbose("Skipping results upload");
+                try
+                {
+                    if (deleteSource)
+                    {
+                        File.Delete(path);
+                    }
+                }
+                catch (Exception ex)
+                {
+                    Trace.Info("Catch exception during delete skipped results upload file.");
+                    Trace.Error(ex);
+                }
+                return;
+            }
 
             // all parameter not null, file path exist.
-            var newFile = new SummaryUploadFileInfo()
+            var newFile = new ResultsUploadFileInfo()
             {
-                TimelineId = timelineId,
-                TimelineRecordId = timelineRecordId,
                 Name = name,
                 Path = path,
+                Type = type,
                 PlanId = _planId.ToString(),
                 JobId = _jobTimelineRecordId.ToString(),
-                StepId = stepId,
+                RecordId = timelineRecordId,
-                DeleteSource = deleteSource
+                DeleteSource = deleteSource,
+                Finalize = finalize,
+                FirstBlock = firstBlock,
+                TotalLines = totalLines,
             };
 
-            Trace.Verbose("Enqueue results file upload queue: file '{0}' attach to record {1}", newFile.Path, timelineRecordId);
+            Trace.Verbose("Enqueue results file upload queue: file '{0}' attach to job {1} step {2}", newFile.Path, _jobTimelineRecordId, timelineRecordId);
-            _summaryFileUploadQueue.Enqueue(newFile);
+            _resultsFileUploadQueue.Enqueue(newFile);
         }
 
         public void QueueTimelineRecordUpdate(Guid timelineId, TimelineRecord timelineRecord)
@@ -350,7 +388,14 @@ namespace GitHub.Runner.Common
                                 // Give at most 60s for each request.
                                 using (var timeoutTokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(60)))
                                 {
-                                    await _jobServer.AppendTimelineRecordFeedAsync(_scopeIdentifier, _hubName, _planId, _jobTimelineId, _jobTimelineRecordId, stepRecordId, batch.Select(logLine => logLine.Line).ToList(), batch[0].LineNumber, timeoutTokenSource.Token);
+                                    if (_resultsServiceOnly)
+                                    {
+                                        await _resultsServer.AppendLiveConsoleFeedAsync(_scopeIdentifier, _hubName, _planId, _jobTimelineId, _jobTimelineRecordId, stepRecordId, batch.Select(logLine => logLine.Line).ToList(), batch[0].LineNumber, timeoutTokenSource.Token);
+                                    }
+                                    else
+                                    {
+                                        await _jobServer.AppendTimelineRecordFeedAsync(_scopeIdentifier, _hubName, _planId, _jobTimelineId, _jobTimelineRecordId, stepRecordId, batch.Select(logLine => logLine.Line).ToList(), batch[0].LineNumber, timeoutTokenSource.Token);
+                                    }
                                 }
 
                                 if (_firstConsoleOutputs)
@@ -442,18 +487,18 @@ namespace GitHub.Runner.Common
             }
         }
 
-        private async Task ProcessSummaryUploadQueueAsync(bool runOnce = false)
+        private async Task ProcessResultsUploadQueueAsync(bool runOnce = false)
         {
             Trace.Info("Starting results-based upload queue...");
 
             while (!_jobCompletionSource.Task.IsCompleted || runOnce)
             {
-                List<SummaryUploadFileInfo> filesToUpload = new();
+                List<ResultsUploadFileInfo> filesToUpload = new();
-                SummaryUploadFileInfo dequeueFile;
+                ResultsUploadFileInfo dequeueFile;
-                while (_summaryFileUploadQueue.TryDequeue(out dequeueFile))
+                while (_resultsFileUploadQueue.TryDequeue(out dequeueFile))
                 {
                     filesToUpload.Add(dequeueFile);
-                    // process at most 10 file upload.
+                    // process at most 10 file uploads.
                     if (!runOnce && filesToUpload.Count > 10)
                     {
                         break;
@@ -464,7 +509,7 @@ namespace GitHub.Runner.Common
                 {
                     if (runOnce)
                     {
-                        Trace.Info($"Uploading {filesToUpload.Count} summary files in one shot through results service.");
+                        Trace.Info($"Uploading {filesToUpload.Count} file(s) in one shot through results service.");
                     }
 
                     int errorCount = 0;
@@ -472,17 +517,38 @@ namespace GitHub.Runner.Common
                     {
                         try
                         {
-                            await UploadSummaryFile(file);
+                            if (String.Equals(file.Type, ChecksAttachmentType.StepSummary, StringComparison.OrdinalIgnoreCase))
+                            {
+                                await UploadSummaryFile(file);
+                            }
+                            else if (String.Equals(file.Type, CoreAttachmentType.ResultsLog, StringComparison.OrdinalIgnoreCase))
+                            {
+                                if (file.RecordId != _jobTimelineRecordId)
+                                {
+                                    Trace.Info($"Got a step log file to send to results service.");
+                                    await UploadResultsStepLogFile(file);
+                                }
+                                else if (file.RecordId == _jobTimelineRecordId)
+                                {
+                                    Trace.Info($"Got a job log file to send to results service.");
+                                    await UploadResultsJobLogFile(file);
+                                }
+                            }
                         }
                         catch (Exception ex)
                         {
-                            Trace.Info("Catch exception during summary file upload to results, keep going since the process is best effort.");
+                            Trace.Info("Catch exception during file upload to results, keep going since the process is best effort.");
                             Trace.Error(ex);
                             errorCount++;
+
+                            // If we hit any exceptions uploading to Results, let's skip any additional uploads to Results
+                            _resultsClientInitiated = false;
+
+                            SendResultsTelemetry(ex);
                         }
                     }
 
-                    Trace.Info("Tried to upload {0} summary files to results, success rate: {1}/{0}.", filesToUpload.Count, filesToUpload.Count - errorCount);
+                    Trace.Info("Tried to upload {0} file(s) to results, success rate: {1}/{0}.", filesToUpload.Count, filesToUpload.Count - errorCount);
                 }
 
                 if (runOnce)
@@ -491,11 +557,24 @@ namespace GitHub.Runner.Common
                 }
                 else
                 {
-                    await Task.Delay(_delayForSummaryUploadDequeue);
+                    await Task.Delay(_delayForResultsUploadDequeue);
                 }
             }
         }
 
+        private void SendResultsTelemetry(Exception ex)
+        {
+            var issue = new Issue() { Type = IssueType.Warning, Message = $"Caught exception with results. {ex.Message}" };
+            issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.ResultsUploadFailure;
+
+            var telemetryRecord = new TimelineRecord()
+            {
+                Id = Constants.Runner.TelemetryRecordId,
+            };
+            telemetryRecord.Issues.Add(issue);
+            QueueTimelineRecordUpdate(_jobTimelineId, telemetryRecord);
+        }
+
         private async Task ProcessTimelinesUpdateQueueAsync(bool runOnce = false)
         {
             while (!_jobCompletionSource.Task.IsCompleted || runOnce)
@@ -543,7 +622,7 @@ namespace GitHub.Runner.Common
 
                         foreach (var detailTimeline in update.PendingRecords.Where(r => r.Details != null))
                         {
-                            if (!_allTimelines.Contains(detailTimeline.Details.Id))
+                            if (!_resultsServiceOnly && !_allTimelines.Contains(detailTimeline.Details.Id))
                             {
                                 try
                                 {
@@ -565,7 +644,27 @@ namespace GitHub.Runner.Common
 
                         try
                         {
-                            await _jobServer.UpdateTimelineRecordsAsync(_scopeIdentifier, _hubName, _planId, update.TimelineId, update.PendingRecords, default(CancellationToken));
+                            if (!_resultsServiceOnly)
+                            {
+                                await _jobServer.UpdateTimelineRecordsAsync(_scopeIdentifier, _hubName, _planId, update.TimelineId, update.PendingRecords, default(CancellationToken));
+                            }
+
+                            try
+                            {
+                                if (_resultsClientInitiated)
+                                {
+                                    await _resultsServer.UpdateResultsWorkflowStepsAsync(_scopeIdentifier, _hubName, _planId, update.TimelineId, update.PendingRecords, default(CancellationToken));
+                                }
+                            }
+                            catch (Exception e)
+                            {
+                                Trace.Info("Catch exception during update steps, skip update Results.");
+                                Trace.Error(e);
+                                _resultsClientInitiated = false;
+
+                                SendResultsTelemetry(e);
+                            }
+
                             if (_bufferedRetryRecords.Remove(update.TimelineId))
                             {
                                 Trace.Verbose("Cleanup buffered timeline record for timeline: {0}.", update.TimelineId);
@@ -657,17 +756,17 @@ namespace GitHub.Runner.Common
                     timelineRecord.State = rec.State ?? timelineRecord.State;
                     timelineRecord.WorkerName = rec.WorkerName ?? timelineRecord.WorkerName;
 
-                    if (rec.ErrorCount != null && rec.ErrorCount > 0)
+                    if (rec.ErrorCount > 0)
                     {
                         timelineRecord.ErrorCount = rec.ErrorCount;
                     }
 
-                    if (rec.WarningCount != null && rec.WarningCount > 0)
+                    if (rec.WarningCount > 0)
                     {
                         timelineRecord.WarningCount = rec.WarningCount;
                     }
 
-                    if (rec.NoticeCount != null && rec.NoticeCount > 0)
+                    if (rec.NoticeCount > 0)
                     {
                         timelineRecord.NoticeCount = rec.NoticeCount;
                     }
@@ -698,7 +797,7 @@ namespace GitHub.Runner.Common
             foreach (var record in mergedRecords)
             {
                 Trace.Verbose($"    Record: t={record.RecordType}, n={record.Name}, s={record.State}, st={record.StartTime}, {record.PercentComplete}%, ft={record.FinishTime}, r={record.Result}: {record.CurrentOperation}");
-                if (record.Issues != null && record.Issues.Count > 0)
+                if (record.Issues != null)
                 {
                     foreach (var issue in record.Issues)
                     {
@@ -708,7 +807,7 @@ namespace GitHub.Runner.Common
                     }
                 }
 
-                if (record.Variables != null && record.Variables.Count > 0)
+                if (record.Variables != null)
                 {
                     foreach (var variable in record.Variables)
                     {
@@ -725,27 +824,30 @@ namespace GitHub.Runner.Common
             bool uploadSucceed = false;
             try
             {
-                if (String.Equals(file.Type, CoreAttachmentType.Log, StringComparison.OrdinalIgnoreCase))
+                if (!_resultsServiceOnly)
                 {
-                    // Create the log
+                    if (String.Equals(file.Type, CoreAttachmentType.Log, StringComparison.OrdinalIgnoreCase))
-                    var taskLog = await _jobServer.CreateLogAsync(_scopeIdentifier, _hubName, _planId, new TaskLog(String.Format(@"logs\{0:D}", file.TimelineRecordId)), default(CancellationToken));
-
-                    // Upload the contents
-                    using (FileStream fs = File.Open(file.Path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
                     {
-                        var logUploaded = await _jobServer.AppendLogContentAsync(_scopeIdentifier, _hubName, _planId, taskLog.Id, fs, default(CancellationToken));
+                        // Create the log
+                        var taskLog = await _jobServer.CreateLogAsync(_scopeIdentifier, _hubName, _planId, new TaskLog(String.Format(@"logs\{0:D}", file.TimelineRecordId)), default(CancellationToken));
+
+                        // Upload the contents
+                        using (FileStream fs = File.Open(file.Path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
+                        {
+                            var logUploaded = await _jobServer.AppendLogContentAsync(_scopeIdentifier, _hubName, _planId, taskLog.Id, fs, default(CancellationToken));
+                        }
+
+                        // Create a new record and only set the Log field
+                        var attachmentUpdataRecord = new TimelineRecord() { Id = file.TimelineRecordId, Log = taskLog };
+                        QueueTimelineRecordUpdate(file.TimelineId, attachmentUpdataRecord);
                     }
-
+                    else
-                    // Create a new record and only set the Log field
-                    var attachmentUpdataRecord = new TimelineRecord() { Id = file.TimelineRecordId, Log = taskLog };
-                    QueueTimelineRecordUpdate(file.TimelineId, attachmentUpdataRecord);
-                }
-                else
-                {
-                    // Create attachment
-                    using (FileStream fs = File.Open(file.Path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
                     {
-                        var result = await _jobServer.CreateAttachmentAsync(_scopeIdentifier, _hubName, _planId, file.TimelineId, file.TimelineRecordId, file.Type, file.Name, fs, default(CancellationToken));
+                        // Create attachment
+                        using (FileStream fs = File.Open(file.Path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
+                        {
+                            var result = await _jobServer.CreateAttachmentAsync(_scopeIdentifier, _hubName, _planId, file.TimelineId, file.TimelineRecordId, file.Type, file.Name, fs, default(CancellationToken));
+                        }
                     }
                 }
 
@@ -768,16 +870,50 @@ namespace GitHub.Runner.Common
             }
         }
 
-        private async Task UploadSummaryFile(SummaryUploadFileInfo file)
+        private async Task UploadSummaryFile(ResultsUploadFileInfo file)
         {
+            Trace.Info($"Starting to upload summary file to results service {file.Name}, {file.Path}");
+            ResultsFileUploadHandler summaryHandler = async (file) =>
+            {
+                await _resultsServer.CreateResultsStepSummaryAsync(file.PlanId, file.JobId, file.RecordId, file.Path, CancellationToken.None);
+            };
+
+            await UploadResultsFile(file, summaryHandler);
+        }
+
+        private async Task UploadResultsStepLogFile(ResultsUploadFileInfo file)
+        {
+            Trace.Info($"Starting upload of step log file to results service {file.Name}, {file.Path}");
+            ResultsFileUploadHandler stepLogHandler = async (file) =>
+            {
+                await _resultsServer.CreateResultsStepLogAsync(file.PlanId, file.JobId, file.RecordId, file.Path, file.Finalize, file.FirstBlock, file.TotalLines, CancellationToken.None);
+            };
+
+            await UploadResultsFile(file, stepLogHandler);
+        }
+
+        private async Task UploadResultsJobLogFile(ResultsUploadFileInfo file)
+        {
+            Trace.Info($"Starting upload of job log file to results service {file.Name}, {file.Path}");
+            ResultsFileUploadHandler jobLogHandler = async (file) =>
+            {
+                await _resultsServer.CreateResultsJobLogAsync(file.PlanId, file.JobId, file.Path, file.Finalize, file.FirstBlock, file.TotalLines, CancellationToken.None);
+            };
+
+            await UploadResultsFile(file, jobLogHandler);
+        }
+
+        private async Task UploadResultsFile(ResultsUploadFileInfo file, ResultsFileUploadHandler uploadHandler)
+        {
+            if (!_resultsClientInitiated)
+            {
+                return;
+            }
+
             bool uploadSucceed = false;
             try
             {
-                // Upload the step summary
+                await uploadHandler(file);
-                Trace.Info($"Starting to upload summary file to results service {file.Name}, {file.Path}");
-                var cancellationTokenSource = new CancellationTokenSource();
-                await _jobServer.CreateStepSymmaryAsync(file.PlanId, file.JobId, file.StepId, file.Path, cancellationTokenSource.Token);
-
                 uploadSucceed = true;
             }
             finally
@@ -790,7 +926,7 @@ namespace GitHub.Runner.Common
                     }
                     catch (Exception ex)
                     {
-                        Trace.Info("Catch exception during delete success results uploaded summary file.");
+                        Trace.Info("Exception encountered during deletion of a temporary file that was already successfully uploaded to results.");
                         Trace.Error(ex);
                     }
                 }
@@ -814,20 +950,20 @@ namespace GitHub.Runner.Common
         public bool DeleteSource { get; set; }
     }
 
-    internal class SummaryUploadFileInfo
+    internal class ResultsUploadFileInfo
     {
-        public Guid TimelineId { get; set; }
-        public Guid TimelineRecordId { get; set; }
         public string Name { get; set; }
+        public string Type { get; set; }
         public string Path { get; set; }
         public string PlanId { get; set; }
         public string JobId { get; set; }
-        public string StepId { get; set; }
+        public Guid RecordId { get; set; }
         public bool DeleteSource { get; set; }
+        public bool Finalize { get; set; }
+        public bool FirstBlock { get; set; }
+        public long TotalLines { get; set; }
     }
 
-
-
     internal class ConsoleLineInfo
     {
         public ConsoleLineInfo(Guid recordId, string line, long? lineNumber)

src/Runner.Common/LaunchServer.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.DistributedTask.WebApi;
+using GitHub.Services.Launch.Client;
+using GitHub.Services.WebApi;
+
+namespace GitHub.Runner.Common
+{
+    [ServiceLocator(Default = typeof(LaunchServer))]
+    public interface ILaunchServer : IRunnerService
+    {
+        void InitializeLaunchClient(Uri uri, string token);
+
+        Task<ActionDownloadInfoCollection> ResolveActionsDownloadInfoAsync(Guid planId, Guid jobId, ActionReferenceList actionReferenceList, CancellationToken cancellationToken);
+    }
+
+    public sealed class LaunchServer : RunnerService, ILaunchServer
+    {
+        private LaunchHttpClient _launchClient;
+
+        public void InitializeLaunchClient(Uri uri, string token)
+        {
+            var httpMessageHandler = HostContext.CreateHttpClientHandler();
+            this._launchClient = new LaunchHttpClient(uri, httpMessageHandler, token, disposeHandler: true);
+        }
+
+        public Task<ActionDownloadInfoCollection> ResolveActionsDownloadInfoAsync(Guid planId, Guid jobId, ActionReferenceList actionReferenceList,
+            CancellationToken cancellationToken)
+        {
+            if (_launchClient != null)
+            {
+                return _launchClient.GetResolveActionsDownloadInfoAsync(planId, jobId, actionReferenceList,
+                    cancellationToken: cancellationToken);
+            }
+
+            throw new InvalidOperationException("Launch client is not initialized.");
+        }
+    }
+}

src/Runner.Common/Logging.cs

@@ -21,6 +21,12 @@ namespace GitHub.Runner.Common
         // 8 MB
         public const int PageSize = 8 * 1024 * 1024;
 
+        // For Results
+        public static string BlocksFolder = "blocks";
+
+        // 2 MB
+        public const int BlockSize = 2 * 1024 * 1024;
+
         private Guid _timelineId;
         private Guid _timelineRecordId;
         private FileStream _pageData;
@@ -32,6 +38,13 @@ namespace GitHub.Runner.Common
         private string _pagesFolder;
         private IJobServerQueue _jobServerQueue;
 
+        private string _resultsDataFileName;
+        private FileStream _resultsBlockData;
+        private StreamWriter _resultsBlockWriter;
+        private string _resultsBlockFolder;
+        private int _blockByteCount;
+        private int _blockCount;
+
         public long TotalLines => _totalLines;
 
         public override void Initialize(IHostContext hostContext)
@@ -39,8 +52,10 @@ namespace GitHub.Runner.Common
             base.Initialize(hostContext);
             _totalLines = 0;
             _pagesFolder = Path.Combine(hostContext.GetDirectory(WellKnownDirectory.Diag), PagingFolder);
-            _jobServerQueue = HostContext.GetService<IJobServerQueue>();
             Directory.CreateDirectory(_pagesFolder);
+            _resultsBlockFolder = Path.Combine(hostContext.GetDirectory(WellKnownDirectory.Diag), BlocksFolder);
+            Directory.CreateDirectory(_resultsBlockFolder);
+            _jobServerQueue = HostContext.GetService<IJobServerQueue>();
         }
 
         public void Setup(Guid timelineId, Guid timelineRecordId)
@@ -60,11 +75,17 @@ namespace GitHub.Runner.Common
             // lazy creation on write
             if (_pageWriter == null)
             {
-                Create();
+                NewPage();
+            }
+
+            if (_resultsBlockWriter == null)
+            {
+                NewBlock();
             }
 
             string line = $"{DateTime.UtcNow.ToString("O")} {message}";
             _pageWriter.WriteLine(line);
+            _resultsBlockWriter.WriteLine(line);
 
             _totalLines++;
             if (line.IndexOf('\n') != -1)
@@ -78,21 +99,25 @@ namespace GitHub.Runner.Common
                 }
             }
 
-            _byteCount += System.Text.Encoding.UTF8.GetByteCount(line);
+            var bytes = System.Text.Encoding.UTF8.GetByteCount(line);
+            _byteCount += bytes;
+            _blockByteCount += bytes;
             if (_byteCount >= PageSize)
             {
                 NewPage();
             }
+
+            if (_blockByteCount >= BlockSize)
+            {
+                NewBlock();
+            }
+
         }
 
         public void End()
         {
             EndPage();
-        }
+            EndBlock(true);
-
-        private void Create()
-        {
-            NewPage();
         }
 
         private void NewPage()
@@ -117,5 +142,27 @@ namespace GitHub.Runner.Common
                 _jobServerQueue.QueueFileUpload(_timelineId, _timelineRecordId, "DistributedTask.Core.Log", "CustomToolLog", _dataFileName, true);
             }
         }
+
+        private void NewBlock()
+        {
+            EndBlock(false);
+            _blockByteCount = 0;
+            _resultsDataFileName = Path.Combine(_resultsBlockFolder, $"{_timelineId}_{_timelineRecordId}.{++_blockCount}");
+            _resultsBlockData = new FileStream(_resultsDataFileName, FileMode.CreateNew, FileAccess.ReadWrite, FileShare.ReadWrite);
+            _resultsBlockWriter = new StreamWriter(_resultsBlockData, System.Text.Encoding.UTF8);
+        }
+
+        private void EndBlock(bool finalize)
+        {
+            if (_resultsBlockWriter != null)
+            {
+                _resultsBlockWriter.Flush();
+                _resultsBlockData.Flush();
+                _resultsBlockWriter.Dispose();
+                _resultsBlockWriter = null;
+                _resultsBlockData = null;
+                _jobServerQueue.QueueResultsUpload(_timelineRecordId, "ResultsLog", _resultsDataFileName, "Results.Core.Log", deleteSource: true, finalize, firstBlock: _resultsDataFileName.EndsWith(".1"), totalLines: _totalLines);
+            }
+        }
     }
 }

src/Runner.Common/ResultsServer.cs

@@ -0,0 +1,262 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http.Headers;
+using System.Net.WebSockets;
+using System.Security;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Sdk;
+using GitHub.Services.Common;
+using GitHub.Services.Results.Client;
+using GitHub.Services.WebApi.Utilities.Internal;
+
+namespace GitHub.Runner.Common
+{
+    [ServiceLocator(Default = typeof(ResultServer))]
+    public interface IResultsServer : IRunnerService, IAsyncDisposable
+    {
+        void InitializeResultsClient(Uri uri, string liveConsoleFeedUrl, string token);
+
+        Task<bool> AppendLiveConsoleFeedAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, Guid stepId, IList<string> lines, long? startLine, CancellationToken cancellationToken);
+
+        // logging and console
+        Task CreateResultsStepSummaryAsync(string planId, string jobId, Guid stepId, string file,
+            CancellationToken cancellationToken);
+
+        Task CreateResultsStepLogAsync(string planId, string jobId, Guid stepId, string file, bool finalize,
+            bool firstBlock, long lineCount, CancellationToken cancellationToken);
+
+        Task CreateResultsJobLogAsync(string planId, string jobId, string file, bool finalize, bool firstBlock,
+            long lineCount, CancellationToken cancellationToken);
+
+        Task UpdateResultsWorkflowStepsAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId,
+            IEnumerable<TimelineRecord> records, CancellationToken cancellationToken);
+    }
+
+    public sealed class ResultServer : RunnerService, IResultsServer
+    {
+        private ResultsHttpClient _resultsClient;
+
+        private ClientWebSocket _websocketClient;
+        private DateTime? _lastConnectionFailure;
+
+        private static readonly TimeSpan MinDelayForWebsocketReconnect = TimeSpan.FromMilliseconds(100);
+        private static readonly TimeSpan MaxDelayForWebsocketReconnect = TimeSpan.FromMilliseconds(500);
+
+        private Task _websocketConnectTask;
+        private String _liveConsoleFeedUrl;
+        private string _token;
+
+        public void InitializeResultsClient(Uri uri, string liveConsoleFeedUrl, string token)
+        {
+            var httpMessageHandler = HostContext.CreateHttpClientHandler();
+            this._resultsClient = new ResultsHttpClient(uri, httpMessageHandler, token, disposeHandler: true);
+            _token = token;
+            if (!string.IsNullOrEmpty(liveConsoleFeedUrl))
+            {
+                _liveConsoleFeedUrl = liveConsoleFeedUrl;
+                InitializeWebsocketClient(liveConsoleFeedUrl, token, TimeSpan.Zero, retryConnection: true);
+            }
+        }
+
+        public Task CreateResultsStepSummaryAsync(string planId, string jobId, Guid stepId, string file,
+            CancellationToken cancellationToken)
+        {
+            if (_resultsClient != null)
+            {
+                return _resultsClient.UploadStepSummaryAsync(planId, jobId, stepId, file,
+                    cancellationToken: cancellationToken);
+            }
+
+            throw new InvalidOperationException("Results client is not initialized.");
+        }
+
+        public Task CreateResultsStepLogAsync(string planId, string jobId, Guid stepId, string file, bool finalize,
+            bool firstBlock, long lineCount, CancellationToken cancellationToken)
+        {
+            if (_resultsClient != null)
+            {
+                return _resultsClient.UploadResultsStepLogAsync(planId, jobId, stepId, file, finalize, firstBlock,
+                    lineCount, cancellationToken: cancellationToken);
+            }
+
+            throw new InvalidOperationException("Results client is not initialized.");
+        }
+
+        public Task CreateResultsJobLogAsync(string planId, string jobId, string file, bool finalize, bool firstBlock,
+            long lineCount, CancellationToken cancellationToken)
+        {
+            if (_resultsClient != null)
+            {
+                return _resultsClient.UploadResultsJobLogAsync(planId, jobId, file, finalize, firstBlock, lineCount,
+                    cancellationToken: cancellationToken);
+            }
+
+            throw new InvalidOperationException("Results client is not initialized.");
+        }
+
+        public Task UpdateResultsWorkflowStepsAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId,
+            IEnumerable<TimelineRecord> records, CancellationToken cancellationToken)
+        {
+            if (_resultsClient != null)
+            {
+                try
+                {
+                    var timelineRecords = records.ToList();
+                    return _resultsClient.UpdateWorkflowStepsAsync(planId, new List<TimelineRecord>(timelineRecords),
+                        cancellationToken: cancellationToken);
+                }
+                catch (Exception ex)
+                {
+                    // Log error, but continue as this call is best-effort
+                    Trace.Info($"Failed to update steps status due to {ex.GetType().Name}");
+                    Trace.Error(ex);
+                }
+            }
+
+            throw new InvalidOperationException("Results client is not initialized.");
+        }
+
+        public ValueTask DisposeAsync()
+        {
+            CloseWebSocket(WebSocketCloseStatus.NormalClosure, CancellationToken.None);
+
+            GC.SuppressFinalize(this);
+
+            return ValueTask.CompletedTask;
+        }
+
+        private void InitializeWebsocketClient(string liveConsoleFeedUrl, string accessToken, TimeSpan delay, bool retryConnection = false)
+        {
+            if (string.IsNullOrEmpty(accessToken))
+            {
+                Trace.Info($"No access token from server");
+                return;
+            }
+
+            if (string.IsNullOrEmpty(liveConsoleFeedUrl))
+            {
+                Trace.Info($"No live console feed url from server");
+                return;
+            }
+
+            Trace.Info($"Creating websocket client ..." + liveConsoleFeedUrl);
+            this._websocketClient = new ClientWebSocket();
+            this._websocketClient.Options.SetRequestHeader("Authorization", $"Bearer {accessToken}");
+            var userAgentValues = new List<ProductInfoHeaderValue>();
+            userAgentValues.AddRange(UserAgentUtility.GetDefaultRestUserAgent());
+            userAgentValues.AddRange(HostContext.UserAgents);
+            this._websocketClient.Options.SetRequestHeader("User-Agent", string.Join(" ", userAgentValues.Select(x => x.ToString())));
+
+            // during initialization, retry upto 3 times to setup connection
+            this._websocketConnectTask = ConnectWebSocketClient(liveConsoleFeedUrl, delay, retryConnection);
+        }
+
+        private async Task ConnectWebSocketClient(string feedStreamUrl, TimeSpan delay, bool retryConnection = false)
+        {
+            bool connected = false;
+            int retries = 0;
+
+            do
+            {
+                try
+                {
+                    Trace.Info($"Attempting to start websocket client with delay {delay}.");
+                    await Task.Delay(delay);
+                    using var connectTimeoutTokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(30));
+                    await this._websocketClient.ConnectAsync(new Uri(feedStreamUrl), connectTimeoutTokenSource.Token);
+                    Trace.Info($"Successfully started websocket client.");
+                    connected = true;
+                }
+                catch (Exception ex)
+                {
+                    Trace.Info("Exception caught during websocket client connect, retry connection.");
+                    Trace.Error(ex);
+                    retries++;
+                    this._websocketClient = null;
+                    _lastConnectionFailure = DateTime.Now;
+                }
+            } while (retryConnection && !connected && retries < 3);
+        }
+
+        public async Task<bool> AppendLiveConsoleFeedAsync(Guid scopeIdentifier, string hubName, Guid planId, Guid timelineId, Guid timelineRecordId, Guid stepId, IList<string> lines, long? startLine, CancellationToken cancellationToken)
+        {
+            if (_websocketConnectTask != null)
+            {
+                await _websocketConnectTask;
+            }
+
+            bool delivered = false;
+            int retries = 0;
+
+            // "_websocketClient != null" implies either: We have a successful connection OR we have to attempt sending again and then reconnect
+            // ...in other words, if websocket client is null, we will skip sending to websocket
+            if (_websocketClient != null)
+            {
+                var linesWrapper = startLine.HasValue
+                    ? new TimelineRecordFeedLinesWrapper(stepId, lines, startLine.Value)
+                    : new TimelineRecordFeedLinesWrapper(stepId, lines);
+                var jsonData = StringUtil.ConvertToJson(linesWrapper);
+                var jsonDataBytes = Encoding.UTF8.GetBytes(jsonData);
+                // break the message into chunks of 1024 bytes
+                for (var i = 0; i < jsonDataBytes.Length; i += 1 * 1024)
+                {
+                    var lastChunk = i + (1 * 1024) >= jsonDataBytes.Length;
+                    var chunk = new ArraySegment<byte>(jsonDataBytes, i, Math.Min(1 * 1024, jsonDataBytes.Length - i));
+
+                    delivered = false;
+                    while (!delivered && retries < 3)
+                    {
+                        try
+                        {
+                            if (_websocketClient != null)
+                            {
+                                await _websocketClient.SendAsync(chunk, WebSocketMessageType.Text, endOfMessage: lastChunk, cancellationToken);
+                                delivered = true;
+                            }
+                        }
+                        catch (Exception ex)
+                        {
+                            var delay = BackoffTimerHelper.GetRandomBackoff(MinDelayForWebsocketReconnect, MaxDelayForWebsocketReconnect);
+                            Trace.Info($"Websocket is not open, let's attempt to connect back again with random backoff {delay} ms.");
+                            Trace.Verbose(ex.ToString());
+                            retries++;
+                            InitializeWebsocketClient(_liveConsoleFeedUrl, _token, delay);
+                        }
+                    }
+                }
+            }
+
+            if (!delivered)
+            {
+                // Giving up for now, so next invocation of this method won't attempt to reconnect
+                _websocketClient = null;
+
+                // however if 10 minutes have already passed, let's try reestablish connection again
+                if (_lastConnectionFailure.HasValue && DateTime.Now > _lastConnectionFailure.Value.AddMinutes(10))
+                {
+                    // Some minutes passed since we retried last time, try connection again
+                    InitializeWebsocketClient(_liveConsoleFeedUrl, _token, TimeSpan.Zero);
+                }
+            }
+
+            return delivered;
+        }
+
+        private void CloseWebSocket(WebSocketCloseStatus closeStatus, CancellationToken cancellationToken)
+        {
+            try
+            {
+                _websocketClient?.CloseOutputAsync(closeStatus, "Closing websocket", cancellationToken);
+            }
+            catch (Exception websocketEx)
+            {
+                // In some cases this might be okay since the websocket might be open yet, so just close and don't trace exceptions
+                Trace.Info($"Failed to close websocket gracefully {websocketEx.GetType().Name}");
+            }
+        }
+    }
+}

src/Runner.Common/RunServer.cs

@@ -1,11 +1,13 @@
-using System;
+using System;
+using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
+using GitHub.Actions.RunService.WebApi;
 using GitHub.DistributedTask.Pipelines;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Sdk;
 using GitHub.Services.Common;
-using GitHub.Services.WebApi;
+using Sdk.RSWebApi.Contracts;
 using Sdk.WebApi.WebApi.RawClient;
 
 namespace GitHub.Runner.Common
@@ -16,6 +18,17 @@ namespace GitHub.Runner.Common
         Task ConnectAsync(Uri serverUrl, VssCredentials credentials);
 
         Task<AgentJobRequestMessage> GetJobMessageAsync(string id, CancellationToken token);
+
+        Task CompleteJobAsync(
+            Guid planId,
+            Guid jobId,
+            TaskResult result,
+            Dictionary<String, VariableValue> outputs,
+            IList<StepResult> stepResults,
+            IList<Annotation> jobAnnotations,
+            CancellationToken token);
+
+        Task<RenewJobResponse> RenewJobAsync(Guid planId, Guid jobId, CancellationToken token);
     }
 
     public sealed class RunServer : RunnerService, IRunServer
@@ -29,7 +42,7 @@ namespace GitHub.Runner.Common
         {
             requestUri = serverUri;
 
-            _connection = VssUtil.CreateRawConnection(new Uri(serverUri.Authority), credentials);
+            _connection = VssUtil.CreateRawConnection(serverUri, credentials);
             _runServiceHttpClient = await _connection.GetClientAsync<RunServiceHttpClient>();
             _hasConnection = true;
         }
@@ -45,15 +58,30 @@ namespace GitHub.Runner.Common
         public Task<AgentJobRequestMessage> GetJobMessageAsync(string id, CancellationToken cancellationToken)
         {
             CheckConnection();
-            var jobMessage = RetryRequest<AgentJobRequestMessage>(
+            return RetryRequest<AgentJobRequestMessage>(
-                async () => await _runServiceHttpClient.GetJobMessageAsync(requestUri, id, cancellationToken), cancellationToken);
+                async () => await _runServiceHttpClient.GetJobMessageAsync(requestUri, id, cancellationToken), cancellationToken,
-            if (jobMessage == null)
+                shouldRetry: ex => ex is not TaskOrchestrationJobAlreadyAcquiredException);
-            {
-                throw new TaskOrchestrationJobNotFoundException(id);
-            }
-
-            return jobMessage;
         }
 
+        public Task CompleteJobAsync(
+            Guid planId,
+            Guid jobId,
+            TaskResult result,
+            Dictionary<String, VariableValue> outputs,
+            IList<StepResult> stepResults,
+            IList<Annotation> jobAnnotations,
+            CancellationToken cancellationToken)
+        {
+            CheckConnection();
+            return RetryRequest(
+                async () => await _runServiceHttpClient.CompleteJobAsync(requestUri, planId, jobId, result, outputs, stepResults, jobAnnotations, cancellationToken), cancellationToken);
+        }
+
+        public Task<RenewJobResponse> RenewJobAsync(Guid planId, Guid jobId, CancellationToken cancellationToken)
+        {
+            CheckConnection();
+            return RetryRequest<RenewJobResponse>(
+                async () => await _runServiceHttpClient.RenewJobAsync(requestUri, planId, jobId, cancellationToken), cancellationToken);
+        }
     }
 }

src/Runner.Common/RunnerDotcomServer.cs

@@ -0,0 +1,237 @@
+using GitHub.DistributedTask.WebApi;
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.Services.WebApi;
+using GitHub.Services.Common;
+using GitHub.Runner.Sdk;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Linq;
+
+namespace GitHub.Runner.Common
+{
+    [ServiceLocator(Default = typeof(RunnerDotcomServer))]
+    public interface IRunnerDotcomServer : IRunnerService
+    {
+        Task<List<TaskAgent>> GetRunnersAsync(int runnerGroupId, string githubUrl, string githubToken, string agentName);
+
+        Task<DistributedTask.WebApi.Runner> AddRunnerAsync(int runnerGroupId, TaskAgent agent, string githubUrl, string githubToken, string publicKey);
+        Task<List<TaskAgentPool>> GetRunnerGroupsAsync(string githubUrl, string githubToken);
+
+        string GetGitHubRequestId(HttpResponseHeaders headers);
+    }
+
+    public enum RequestType
+    {
+        Get,
+        Post,
+        Patch,
+        Delete
+    }
+
+    public class RunnerDotcomServer : RunnerService, IRunnerDotcomServer
+    {
+        private ITerminal _term;
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+            _term = hostContext.GetService<ITerminal>();
+        }
+
+
+        public async Task<List<TaskAgent>> GetRunnersAsync(int runnerGroupId, string githubUrl, string githubToken, string agentName = null)
+        {
+            var githubApiUrl = "";
+            var gitHubUrlBuilder = new UriBuilder(githubUrl);
+            var path = gitHubUrlBuilder.Path.Split('/', '\\', StringSplitOptions.RemoveEmptyEntries);
+            if (path.Length == 1)
+            {
+                // org runner
+                if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/orgs/{path[0]}/actions/runner-groups/{runnerGroupId}/runners";
+                }
+                else
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://{gitHubUrlBuilder.Host}/api/v3/orgs/{path[0]}/actions/runner-groups/{runnerGroupId}/runners";
+                }
+            }
+            else if (path.Length == 2)
+            {
+                // repo or enterprise runner.
+                if (!string.Equals(path[0], "enterprises", StringComparison.OrdinalIgnoreCase))
+                {
+                    return null;
+                }
+
+                if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/{path[0]}/{path[1]}/actions/runner-groups/{runnerGroupId}/runners";
+                }
+                else
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://{gitHubUrlBuilder.Host}/api/v3/{path[0]}/{path[1]}/actions/runner-groups/{runnerGroupId}/runners";
+                }
+            }
+            else
+            {
+                throw new ArgumentException($"'{githubUrl}' should point to an org or enterprise.");
+            }
+
+            var runnersList = await RetryRequest<ListRunnersResponse>(githubApiUrl, githubToken, RequestType.Get, 3, "Failed to get agents pools");
+            var agents = runnersList.ToTaskAgents();
+
+            if (string.IsNullOrEmpty(agentName))
+            {
+                return agents;
+            }
+
+            return agents.Where(x => string.Equals(x.Name, agentName, StringComparison.OrdinalIgnoreCase)).ToList();
+        }
+
+        public async Task<List<TaskAgentPool>> GetRunnerGroupsAsync(string githubUrl, string githubToken)
+        {
+            var githubApiUrl = "";
+            var gitHubUrlBuilder = new UriBuilder(githubUrl);
+            var path = gitHubUrlBuilder.Path.Split('/', '\\', StringSplitOptions.RemoveEmptyEntries);
+            if (path.Length == 1)
+            {
+                // org runner
+                if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/orgs/{path[0]}/actions/runner-groups";
+                }
+                else
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://{gitHubUrlBuilder.Host}/api/v3/orgs/{path[0]}/actions/runner-groups";
+                }
+            }
+            else if (path.Length == 2)
+            {
+                // repo or enterprise runner.
+                if (!string.Equals(path[0], "enterprises", StringComparison.OrdinalIgnoreCase))
+                {
+                    return null;
+                }
+
+                if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/{path[0]}/{path[1]}/actions/runner-groups";
+                }
+                else
+                {
+                    githubApiUrl = $"{gitHubUrlBuilder.Scheme}://{gitHubUrlBuilder.Host}/api/v3/{path[0]}/{path[1]}/actions/runner-groups";
+                }
+            }
+            else
+            {
+                throw new ArgumentException($"'{githubUrl}' should point to an org or enterprise.");
+            }
+
+            var agentPools = await RetryRequest<RunnerGroupList>(githubApiUrl, githubToken, RequestType.Get, 3, "Failed to get agents pools");
+
+            return agentPools?.ToAgentPoolList();
+        }
+
+        public async Task<DistributedTask.WebApi.Runner> AddRunnerAsync(int runnerGroupId, TaskAgent agent, string githubUrl, string githubToken, string publicKey)
+        {
+            var gitHubUrlBuilder = new UriBuilder(githubUrl);
+            var path = gitHubUrlBuilder.Path.Split('/', '\\', StringSplitOptions.RemoveEmptyEntries);
+            string githubApiUrl;
+            if (UrlUtil.IsHostedServer(gitHubUrlBuilder))
+            {
+                githubApiUrl = $"{gitHubUrlBuilder.Scheme}://api.{gitHubUrlBuilder.Host}/actions/runners/register";
+            }
+            else
+            {
+                githubApiUrl = $"{gitHubUrlBuilder.Scheme}://{gitHubUrlBuilder.Host}/api/v3/actions/runners/register";
+            }
+
+            var bodyObject = new Dictionary<string, Object>()
+                    {
+                        {"url", githubUrl},
+                        {"group_id", runnerGroupId},
+                        {"name", agent.Name},
+                        {"version", agent.Version},
+                        {"updates_disabled", agent.DisableUpdate},
+                        {"ephemeral", agent.Ephemeral},
+                        {"labels", agent.Labels},
+                        {"public_key", publicKey}
+                    };
+
+            var body = new StringContent(StringUtil.ConvertToJson(bodyObject), null, "application/json");
+
+            return await RetryRequest<DistributedTask.WebApi.Runner>(githubApiUrl, githubToken, RequestType.Post, 3, "Failed to add agent", body);
+        }
+
+        private async Task<T> RetryRequest<T>(string githubApiUrl, string githubToken, RequestType requestType, int maxRetryAttemptsCount = 5, string errorMessage = null, StringContent body = null)
+        {
+            int retry = 0;
+            while (true)
+            {
+                retry++;
+                using (var httpClientHandler = HostContext.CreateHttpClientHandler())
+                using (var httpClient = new HttpClient(httpClientHandler))
+                {
+                    httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("RemoteAuth", githubToken);
+                    httpClient.DefaultRequestHeaders.UserAgent.AddRange(HostContext.UserAgents);
+
+                    var responseStatus = System.Net.HttpStatusCode.OK;
+                    try
+                    {
+                        HttpResponseMessage response = null;
+                        if (requestType == RequestType.Get)
+                        {
+                            response = await httpClient.GetAsync(githubApiUrl);
+                        }
+                        else
+                        {
+                            response = await httpClient.PostAsync(githubApiUrl, body);
+                        }
+
+                        if (response != null)
+                        {
+                            responseStatus = response.StatusCode;
+                            var githubRequestId = GetGitHubRequestId(response.Headers);
+
+                            if (response.IsSuccessStatusCode)
+                            {
+                                Trace.Info($"Http response code: {response.StatusCode} from '{requestType.ToString()} {githubApiUrl}' ({githubRequestId})");
+                                var jsonResponse = await response.Content.ReadAsStringAsync();
+                                return StringUtil.ConvertFromJson<T>(jsonResponse);
+                            }
+                            else
+                            {
+                                _term.WriteError($"Http response code: {response.StatusCode} from '{requestType.ToString()} {githubApiUrl}' (Request Id: {githubRequestId})");
+                                var errorResponse = await response.Content.ReadAsStringAsync();
+                                _term.WriteError(errorResponse);
+                                response.EnsureSuccessStatusCode();
+                            }
+                        }
+
+                    }
+                    catch (Exception ex) when (retry < maxRetryAttemptsCount && responseStatus != System.Net.HttpStatusCode.NotFound)
+                    {
+                        Trace.Error($"{errorMessage} -- Atempt: {retry}");
+                        Trace.Error(ex);
+                    }
+                }
+                var backOff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(5));
+                Trace.Info($"Retrying in {backOff.Seconds} seconds");
+                await Task.Delay(backOff);
+            }
+        }
+
+        public string GetGitHubRequestId(HttpResponseHeaders headers)
+        {
+            if (headers.TryGetValues("x-github-request-id", out var headerValues))
+            {
+                return headerValues.FirstOrDefault();
+            }
+            return string.Empty;
+        }
+    }
+}

src/Runner.Common/RunnerService.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Threading;
 using System.Threading.Tasks;
 using GitHub.Runner.Sdk;
@@ -68,10 +68,24 @@ namespace GitHub.Runner.Common
             throw new InvalidOperationException(nameof(EstablishVssConnection));
         }
 
-        protected async Task<T> RetryRequest<T>(Func<Task<T>> func,
+        protected async Task RetryRequest(Func<Task> func,
             CancellationToken cancellationToken,
             int maxRetryAttemptsCount = 5
         )
+        {
+            async Task<Unit> wrappedFunc()
+            {
+                await func();
+                return Unit.Value;
+            }
+            await RetryRequest<Unit>(wrappedFunc, cancellationToken, maxRetryAttemptsCount);
+        }
+
+        protected async Task<T> RetryRequest<T>(Func<Task<T>> func,
+            CancellationToken cancellationToken,
+            int maxRetryAttemptsCount = 5,
+            Func<Exception, bool> shouldRetry = null
+        )
         {
             var retryCount = 0;
             while (true)
@@ -83,9 +97,9 @@ namespace GitHub.Runner.Common
                     return await func();
                 }
                 // TODO: Add handling of non-retriable exceptions: https://github.com/github/actions-broker/issues/122
-                catch (Exception ex) when (retryCount < maxRetryAttemptsCount)
+                catch (Exception ex) when (retryCount < maxRetryAttemptsCount && (shouldRetry == null || shouldRetry(ex)))
                 {
-                    Trace.Error("Catch exception during get full job message");
+                    Trace.Error("Catch exception during request");
                     Trace.Error(ex);
                     var backOff = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(5), TimeSpan.FromSeconds(15));
                     Trace.Warning($"Back off {backOff.TotalSeconds} seconds before next retry. {maxRetryAttemptsCount - retryCount} attempt left.");

src/Runner.Common/StdoutTraceListener.cs

@@ -1,8 +1,8 @@
-using GitHub.Runner.Sdk;
 using System;
 using System.Diagnostics;
 using System.Globalization;
 using System.IO;
+using GitHub.Runner.Sdk;
 
 namespace GitHub.Runner.Common
 {
@@ -24,9 +24,16 @@ namespace GitHub.Runner.Common
                 return;
             }
 
-            WriteHeader(source, eventType, id);
+            if (!string.IsNullOrEmpty(message))
-            WriteLine(message);
+            {
-            WriteFooter(eventCache);
+                var messageLines = message.Split(Environment.NewLine);
+                foreach (var messageLine in messageLines)
+                {
+                    WriteHeader(source, eventType, id);
+                    WriteLine(messageLine);
+                    WriteFooter(eventCache);
+                }
+            }
         }
 
         internal bool IsEnabled(TraceOptions opts)
@@ -86,5 +93,4 @@ namespace GitHub.Runner.Common
             IndentLevel--;
         }
     }
-}
+}
-

src/Runner.Common/Unit.cs

@@ -0,0 +1,8 @@
+// Represents absence of value.
+namespace GitHub.Runner.Common
+{
+    public readonly struct Unit
+    {
+        public static readonly Unit Value = default;
+    }
+}

src/Runner.Common/Util/MessageUtil.cs

@@ -0,0 +1,14 @@
+namespace GitHub.Runner.Common.Util
+{
+    using System;
+    using GitHub.DistributedTask.WebApi;
+
+    public static class MessageUtil
+    {
+        public static bool IsRunServiceJob(string messageType)
+        {
+            return string.Equals(messageType, JobRequestMessageTypes.RunnerJobRequest, StringComparison.OrdinalIgnoreCase);
+        }
+    }
+}
+

src/Runner.Listener/BrokerMessageListener.cs

@@ -0,0 +1,209 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Common;
+using GitHub.Runner.Listener.Configuration;
+using GitHub.Runner.Sdk;
+using GitHub.Services.Common;
+using GitHub.Runner.Common.Util;
+using GitHub.Services.OAuth;
+
+namespace GitHub.Runner.Listener
+{
+    public sealed class BrokerMessageListener : RunnerService, IMessageListener
+    {
+        private RunnerSettings _settings;
+        private ITerminal _term;
+        private TimeSpan _getNextMessageRetryInterval;
+        private TaskAgentStatus runnerStatus = TaskAgentStatus.Online;
+        private CancellationTokenSource _getMessagesTokenSource;
+        private IBrokerServer _brokerServer;
+
+        public override void Initialize(IHostContext hostContext)
+        {
+            base.Initialize(hostContext);
+
+            _term = HostContext.GetService<ITerminal>();
+            _brokerServer = HostContext.GetService<IBrokerServer>();
+        }
+
+        public async Task<Boolean> CreateSessionAsync(CancellationToken token)
+        {
+            await RefreshBrokerConnection();
+            return await Task.FromResult(true);
+        }
+
+        public async Task DeleteSessionAsync()
+        {
+            await Task.CompletedTask;
+        }
+
+        public void OnJobStatus(object sender, JobStatusEventArgs e)
+        {
+            Trace.Info("Received job status event. JobState: {0}", e.Status);
+            runnerStatus = e.Status;
+            try
+            {
+                _getMessagesTokenSource?.Cancel();
+            }
+            catch (ObjectDisposedException)
+            {
+                Trace.Info("_getMessagesTokenSource is already disposed.");
+            }
+        }
+
+        public async Task<TaskAgentMessage> GetNextMessageAsync(CancellationToken token)
+        {
+            bool encounteringError = false;
+            int continuousError = 0;
+            Stopwatch heartbeat = new();
+            heartbeat.Restart();
+            var maxRetryCount = 10;
+
+            while (true)
+            {
+                TaskAgentMessage message = null;
+                _getMessagesTokenSource = CancellationTokenSource.CreateLinkedTokenSource(token);
+                try
+                {
+                    message = await _brokerServer.GetRunnerMessageAsync(_getMessagesTokenSource.Token, runnerStatus, BuildConstants.RunnerPackage.Version);
+
+                    if (message == null)
+                    {
+                        continue;
+                    }
+
+                    return message;
+                }
+                catch (OperationCanceledException) when (_getMessagesTokenSource.Token.IsCancellationRequested && !token.IsCancellationRequested)
+                {
+                    Trace.Info("Get messages has been cancelled using local token source. Continue to get messages with new status.");
+                    continue;
+                }
+                catch (OperationCanceledException) when (token.IsCancellationRequested)
+                {
+                    Trace.Info("Get next message has been cancelled.");
+                    throw;
+                }
+                catch (TaskAgentAccessTokenExpiredException)
+                {
+                    Trace.Info("Runner OAuth token has been revoked. Unable to pull message.");
+                    throw;
+                }
+                catch (AccessDeniedException e) when (e.InnerException is InvalidTaskAgentVersionException)
+                {
+                    throw;
+                }
+                catch (Exception ex)
+                {
+                    Trace.Error("Catch exception during get next message.");
+                    Trace.Error(ex);
+
+                    if (!IsGetNextMessageExceptionRetriable(ex))
+                    {
+                        throw;
+                    }
+                    else
+                    {
+                        continuousError++;
+                        //retry after a random backoff to avoid service throttling
+                        //in case of there is a service error happened and all agents get kicked off of the long poll and all agent try to reconnect back at the same time.
+                        if (continuousError <= 5)
+                        {
+                            // random backoff [15, 30]
+                            _getNextMessageRetryInterval = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(15), TimeSpan.FromSeconds(30), _getNextMessageRetryInterval);
+                        }
+                        else if (continuousError >= maxRetryCount)
+                        {
+                            throw;
+                        }
+                        else
+                        {
+                            // more aggressive backoff [30, 60]
+                            _getNextMessageRetryInterval = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(30), TimeSpan.FromSeconds(60), _getNextMessageRetryInterval);
+                        }
+
+                        if (!encounteringError)
+                        {
+                            //print error only on the first consecutive error
+                            _term.WriteError($"{DateTime.UtcNow:u}: Runner connect error: {ex.Message}. Retrying until reconnected.");
+                            encounteringError = true;
+                        }
+
+                        // re-create VssConnection before next retry
+                        await RefreshBrokerConnection();
+
+                        Trace.Info("Sleeping for {0} seconds before retrying.", _getNextMessageRetryInterval.TotalSeconds);
+                        await HostContext.Delay(_getNextMessageRetryInterval, token);
+                    }
+                }
+                finally
+                {
+                    _getMessagesTokenSource.Dispose();
+                }
+
+                if (message == null)
+                {
+                    if (heartbeat.Elapsed > TimeSpan.FromMinutes(30))
+                    {
+                        Trace.Info($"No message retrieved within last 30 minutes.");
+                        heartbeat.Restart();
+                    }
+                    else
+                    {
+                        Trace.Verbose($"No message retrieved.");
+                    }
+
+                    continue;
+                }
+
+                Trace.Info($"Message '{message.MessageId}' received.");
+            }
+        }
+
+        public async Task DeleteMessageAsync(TaskAgentMessage message)
+        {
+            await Task.CompletedTask;
+        }
+
+        private bool IsGetNextMessageExceptionRetriable(Exception ex)
+        {
+            if (ex is TaskAgentNotFoundException ||
+                ex is TaskAgentPoolNotFoundException ||
+                ex is TaskAgentSessionExpiredException ||
+                ex is AccessDeniedException ||
+                ex is VssUnauthorizedException)
+            {
+                Trace.Info($"Non-retriable exception: {ex.Message}");
+                return false;
+            }
+            else
+            {
+                Trace.Info($"Retriable exception: {ex.Message}");
+                return true;
+            }
+        }
+
+        private async Task RefreshBrokerConnection()
+        {
+            var configManager = HostContext.GetService<IConfigurationManager>();
+            _settings = configManager.LoadSettings();
+
+            if (_settings.ServerUrlV2 == null)
+            {
+                throw new InvalidOperationException("ServerUrlV2 is not set");
+            }
+
+            var credMgr = HostContext.GetService<ICredentialManager>();
+            VssCredentials creds = credMgr.LoadCredentials();
+            await _brokerServer.ConnectAsync(new Uri(_settings.ServerUrlV2), creds);
+        }
+    }
+}

src/Runner.Listener/CommandSettings.cs

@@ -29,8 +29,8 @@ namespace GitHub.Runner.Listener
         private readonly Dictionary<string, string[]> validOptions = new()
         {
             // Valid configure flags and args
-            [Constants.Runner.CommandLine.Commands.Configure] = 
+            [Constants.Runner.CommandLine.Commands.Configure] =
-                new string[] 
+                new string[]
                 {
                     Constants.Runner.CommandLine.Flags.DisableUpdate,
                     Constants.Runner.CommandLine.Flags.Ephemeral,
@@ -38,6 +38,7 @@ namespace GitHub.Runner.Listener
                     Constants.Runner.CommandLine.Flags.Replace,
                     Constants.Runner.CommandLine.Flags.RunAsService,
                     Constants.Runner.CommandLine.Flags.Unattended,
+                    Constants.Runner.CommandLine.Flags.NoDefaultLabels,
                     Constants.Runner.CommandLine.Args.Auth,
                     Constants.Runner.CommandLine.Args.Labels,
                     Constants.Runner.CommandLine.Args.MonitorSocketAddress,
@@ -56,7 +57,8 @@ namespace GitHub.Runner.Listener
                 new string[]
                 {
                     Constants.Runner.CommandLine.Args.Token,
-                    Constants.Runner.CommandLine.Args.PAT
+                    Constants.Runner.CommandLine.Args.PAT,
+                    Constants.Runner.CommandLine.Flags.Local
                 },
             // Valid run flags and args
             [Constants.Runner.CommandLine.Commands.Run] =
@@ -84,8 +86,10 @@ namespace GitHub.Runner.Listener
         public bool Ephemeral => TestFlag(Constants.Runner.CommandLine.Flags.Ephemeral);
         public bool GenerateServiceConfig => TestFlag(Constants.Runner.CommandLine.Flags.GenerateServiceConfig);
         public bool Help => TestFlag(Constants.Runner.CommandLine.Flags.Help);
+        public bool NoDefaultLabels => TestFlag(Constants.Runner.CommandLine.Flags.NoDefaultLabels);
         public bool Unattended => TestFlag(Constants.Runner.CommandLine.Flags.Unattended);
         public bool Version => TestFlag(Constants.Runner.CommandLine.Flags.Version);
+        public bool RemoveLocalConfig => TestFlag(Constants.Runner.CommandLine.Flags.Local);
 
         // Keep this around since customers still relies on it
         public bool RunOnce => TestFlag(Constants.Runner.CommandLine.Flags.Once);
@@ -180,7 +184,7 @@ namespace GitHub.Runner.Listener
             {
                 command = Constants.Runner.CommandLine.Commands.Warmup;
             }
-            
+
             return command;
         }
 

src/Runner.Listener/Configuration/ConfigurationManager.cs

@@ -1,10 +1,3 @@
-using GitHub.DistributedTask.WebApi;
-using GitHub.Runner.Common;
-using GitHub.Runner.Common.Util;
-using GitHub.Runner.Sdk;
-using GitHub.Services.Common;
-using GitHub.Services.Common.Internal;
-using GitHub.Services.OAuth;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -14,6 +7,13 @@ using System.Runtime.InteropServices;
 using System.Security.Cryptography;
 using System.Text;
 using System.Threading.Tasks;
+using GitHub.DistributedTask.WebApi;
+using GitHub.Runner.Common;
+using GitHub.Runner.Common.Util;
+using GitHub.Runner.Sdk;
+using GitHub.Services.Common;
+using GitHub.Services.Common.Internal;
+using GitHub.Services.OAuth;
 
 namespace GitHub.Runner.Listener.Configuration
 {
@@ -31,12 +31,14 @@ namespace GitHub.Runner.Listener.Configuration
     {
         private IConfigurationStore _store;
         private IRunnerServer _runnerServer;
+        private IRunnerDotcomServer _dotcomServer;
         private ITerminal _term;
 
         public override void Initialize(IHostContext hostContext)
         {
             base.Initialize(hostContext);
             _runnerServer = HostContext.GetService<IRunnerServer>();
+            _dotcomServer = HostContext.GetService<IRunnerDotcomServer>();
             Trace.Verbose("Creating _store");
             _store = hostContext.GetService<IConfigurationStore>();
             Trace.Verbose("store created");
@@ -113,6 +115,7 @@ namespace GitHub.Runner.Listener.Configuration
             ICredentialProvider credProvider = null;
             VssCredentials creds = null;
             _term.WriteSection("Authentication");
+            string registerToken = string.Empty;
             while (true)
             {
                 // When testing against a dev deployment of Actions Service, set this environment variable
@@ -130,9 +133,11 @@ namespace GitHub.Runner.Listener.Configuration
                 else
                 {
                     runnerSettings.GitHubUrl = inputUrl;
-                    var registerToken = await GetRunnerTokenAsync(command, inputUrl, "registration");
+                    registerToken = await GetRunnerTokenAsync(command, inputUrl, "registration");
                     GitHubAuthResult authResult = await GetTenantCredential(inputUrl, registerToken, Constants.RunnerEvent.Register);
                     runnerSettings.ServerUrl = authResult.TenantUrl;
+                    runnerSettings.UseV2Flow = authResult.UseV2Flow;
+                    Trace.Info($"Using V2 flow: {runnerSettings.UseV2Flow}");
                     creds = authResult.ToVssCredentials();
                     Trace.Info("cred retrieved via GitHub auth");
                 }
@@ -176,9 +181,11 @@ namespace GitHub.Runner.Listener.Configuration
             // We want to use the native CSP of the platform for storage, so we use the RSACSP directly
             RSAParameters publicKey;
             var keyManager = HostContext.GetService<IRSAKeyManager>();
+            string publicKeyXML;
             using (var rsa = keyManager.CreateKey())
             {
                 publicKey = rsa.ExportParameters(false);
+                publicKeyXML = rsa.ToXmlString(includePrivateParameters: false);
             }
 
             _term.WriteSection("Runner Registration");
@@ -186,9 +193,17 @@ namespace GitHub.Runner.Listener.Configuration
             // If we have more than one runner group available, allow the user to specify which one to be added into
             string poolName = null;
             TaskAgentPool agentPool = null;
-            List<TaskAgentPool> agentPools = await _runnerServer.GetAgentPoolsAsync();
+            List<TaskAgentPool> agentPools;
-            TaskAgentPool defaultPool = agentPools?.Where(x => x.IsInternal).FirstOrDefault();
+            if (runnerSettings.UseV2Flow)
+            {
+                agentPools = await _dotcomServer.GetRunnerGroupsAsync(runnerSettings.GitHubUrl, registerToken);
+            }
+            else
+            {
+                agentPools = await _runnerServer.GetAgentPoolsAsync();
+            }
 
+            TaskAgentPool defaultPool = agentPools?.Where(x => x.IsInternal).FirstOrDefault();
             if (agentPools?.Where(x => !x.IsHosted).Count() > 0)
             {
                 poolName = command.GetRunnerGroupName(defaultPool?.Name);
@@ -226,8 +241,16 @@ namespace GitHub.Runner.Listener.Configuration
 
                 var userLabels = command.GetLabels();
                 _term.WriteLine();
+                List<TaskAgent> agents;
+                if (runnerSettings.UseV2Flow)
+                {
+                    agents = await _dotcomServer.GetRunnersAsync(runnerSettings.PoolId, runnerSettings.GitHubUrl, registerToken, runnerSettings.AgentName);
+                }
+                else
+                {
+                    agents = await _runnerServer.GetAgentsAsync(runnerSettings.PoolId, runnerSettings.AgentName);
+                }
 
-                var agents = await _runnerServer.GetAgentsAsync(runnerSettings.PoolId, runnerSettings.AgentName);
                 Trace.Verbose("Returns {0} agents", agents.Count);
                 agent = agents.FirstOrDefault();
                 if (agent != null)
@@ -236,7 +259,7 @@ namespace GitHub.Runner.Listener.Configuration
                     if (command.GetReplace())
                     {
                         // Update existing agent with new PublicKey, agent version.
-                        agent = UpdateExistingAgent(agent, publicKey, userLabels, runnerSettings.Ephemeral, command.DisableUpdate);
+                        agent = UpdateExistingAgent(agent, publicKey, userLabels, runnerSettings.Ephemeral, command.DisableUpdate, command.NoDefaultLabels);
 
                         try
                         {
@@ -270,11 +293,27 @@ namespace GitHub.Runner.Listener.Configuration
                 else
                 {
                     // Create a new agent.
-                    agent = CreateNewAgent(runnerSettings.AgentName, publicKey, userLabels, runnerSettings.Ephemeral, command.DisableUpdate);
+                    agent = CreateNewAgent(runnerSettings.AgentName, publicKey, userLabels, runnerSettings.Ephemeral, command.DisableUpdate, command.NoDefaultLabels);
 
                     try
                     {
-                        agent = await _runnerServer.AddAgentAsync(runnerSettings.PoolId, agent);
+                        if (runnerSettings.UseV2Flow)
+                        {
+                            var runner = await _dotcomServer.AddRunnerAsync(runnerSettings.PoolId, agent, runnerSettings.GitHubUrl, registerToken, publicKeyXML);
+                            runnerSettings.ServerUrlV2 = runner.RunnerAuthorization.ServerUrl;
+
+                            agent.Id = runner.Id;
+                            agent.Authorization = new TaskAgentAuthorization()
+                            {
+                                AuthorizationUrl = runner.RunnerAuthorization.AuthorizationUrl,
+                                ClientId = new Guid(runner.RunnerAuthorization.ClientId)
+                            };
+                        }
+                        else
+                        {
+                            agent = await _runnerServer.AddAgentAsync(runnerSettings.PoolId, agent);
+                        }
+
                         if (command.DisableUpdate &&
                             command.DisableUpdate != agent.DisableUpdate)
                         {
@@ -325,24 +364,28 @@ namespace GitHub.Runner.Listener.Configuration
             }
 
             // Testing agent connection, detect any potential connection issue, like local clock skew that cause OAuth token expired.
-            var credMgr = HostContext.GetService<ICredentialManager>();
+
-            VssCredentials credential = credMgr.LoadCredentials();
+            if (!runnerSettings.UseV2Flow)
-            try
             {
-                await _runnerServer.ConnectAsync(new Uri(runnerSettings.ServerUrl), credential);
+                var credMgr = HostContext.GetService<ICredentialManager>();
-                // ConnectAsync() hits _apis/connectionData which is an anonymous endpoint
+                VssCredentials credential = credMgr.LoadCredentials();
-                // Need to hit an authenticate endpoint to trigger OAuth token exchange.
+                try
-                await _runnerServer.GetAgentPoolsAsync();
+                {
-                _term.WriteSuccessMessage("Runner connection is good");
+                    await _runnerServer.ConnectAsync(new Uri(runnerSettings.ServerUrl), credential);
-            }
+                    // ConnectAsync() hits _apis/connectionData which is an anonymous endpoint
-            catch (VssOAuthTokenRequestException ex) when (ex.Message.Contains("Current server time is"))
+                    // Need to hit an authenticate endpoint to trigger OAuth token exchange.
-            {
+                    await _runnerServer.GetAgentPoolsAsync();
-                // there are two exception messages server send that indicate clock skew.
+                    _term.WriteSuccessMessage("Runner connection is good");
-                // 1. The bearer token expired on {jwt.ValidTo}. Current server time is {DateTime.UtcNow}.
+                }
-                // 2. The bearer token is not valid until {jwt.ValidFrom}. Current server time is {DateTime.UtcNow}.
+                catch (VssOAuthTokenRequestException ex) when (ex.Message.Contains("Current server time is"))
-                Trace.Error("Catch exception during test agent connection.");
+                {
-                Trace.Error(ex);
+                    // there are two exception messages server send that indicate clock skew.
-                throw new Exception("The local machine's clock may be out of sync with the server time by more than five minutes. Please sync your clock with your domain or internet time and try again.");
+                    // 1. The bearer token expired on {jwt.ValidTo}. Current server time is {DateTime.UtcNow}.
+                    // 2. The bearer token is not valid until {jwt.ValidFrom}. Current server time is {DateTime.UtcNow}.
+                    Trace.Error("Catch exception during test agent connection.");
+                    Trace.Error(ex);
+                    throw new Exception("The local machine's clock may be out of sync with the server time by more than five minutes. Please sync your clock with your domain or internet time and try again.");
+                }
             }
 
             _term.WriteSection("Runner settings");
@@ -511,7 +554,7 @@ namespace GitHub.Runner.Listener.Configuration
         }
 
 
-        private TaskAgent UpdateExistingAgent(TaskAgent agent, RSAParameters publicKey, ISet<string> userLabels, bool ephemeral, bool disableUpdate)
+        private TaskAgent UpdateExistingAgent(TaskAgent agent, RSAParameters publicKey, ISet<string> userLabels, bool ephemeral, bool disableUpdate, bool noDefaultLabels)
         {
             ArgUtil.NotNull(agent, nameof(agent));
             agent.Authorization = new TaskAgentAuthorization
@@ -528,9 +571,16 @@ namespace GitHub.Runner.Listener.Configuration
 
             agent.Labels.Clear();
 
-            agent.Labels.Add(new AgentLabel("self-hosted", LabelType.System));
+            if (!noDefaultLabels)
-            agent.Labels.Add(new AgentLabel(VarUtil.OS, LabelType.System));
+            {
-            agent.Labels.Add(new AgentLabel(VarUtil.OSArchitecture, LabelType.System));
+                agent.Labels.Add(new AgentLabel("self-hosted", LabelType.System));
+                agent.Labels.Add(new AgentLabel(VarUtil.OS, LabelType.System));
+                agent.Labels.Add(new AgentLabel(VarUtil.OSArchitecture, LabelType.System));
+            }
+            else if (userLabels.Count == 0)
+            {
+                throw new NotSupportedException("Disabling default labels via --no-default-labels without specifying --labels is not supported");
+            }
 
             foreach (var userLabel in userLabels)
             {
@@ -540,7 +590,7 @@ namespace GitHub.Runner.Listener.Configuration
             return agent;
         }
 
-        private TaskAgent CreateNewAgent(string agentName, RSAParameters publicKey, ISet<string> userLabels, bool ephemeral, bool disableUpdate)
+        private TaskAgent CreateNewAgent(string agentName, RSAParameters publicKey, ISet<string> userLabels, bool ephemeral, bool disableUpdate, bool noDefaultLabels)
         {
             TaskAgent agent = new(agentName)
             {
@@ -555,9 +605,16 @@ namespace GitHub.Runner.Listener.Configuration
                 DisableUpdate = disableUpdate
             };
 
-            agent.Labels.Add(new AgentLabel("self-hosted", LabelType.System));
+            if (!noDefaultLabels)
-            agent.Labels.Add(new AgentLabel(VarUtil.OS, LabelType.System));
+            {
-            agent.Labels.Add(new AgentLabel(VarUtil.OSArchitecture, LabelType.System));
+                agent.Labels.Add(new AgentLabel("self-hosted", LabelType.System));
+                agent.Labels.Add(new AgentLabel(VarUtil.OS, LabelType.System));
+                agent.Labels.Add(new AgentLabel(VarUtil.OSArchitecture, LabelType.System));
+            }
+            else if (userLabels.Count == 0)
+            {
+                throw new NotSupportedException("Disabling default labels via --no-default-labels without specifying --labels is not supported");
+            }
 
             foreach (var userLabel in userLabels)
             {
@@ -636,7 +693,7 @@ namespace GitHub.Runner.Listener.Configuration
             }
 
             int retryCount = 0;
-            while(retryCount < 3)
+            while (retryCount < 3)
             {
                 using (var httpClientHandler = HostContext.CreateHttpClientHandler())
                 using (var httpClient = new HttpClient(httpClientHandler))
@@ -646,28 +703,29 @@ namespace GitHub.Runner.Listener.Configuration
                     httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("basic", base64EncodingToken);
                     httpClient.DefaultRequestHeaders.UserAgent.AddRange(HostContext.UserAgents);
                     httpClient.DefaultRequestHeaders.Accept.ParseAdd("application/vnd.github.v3+json");
-                    
+
                     var responseStatus = System.Net.HttpStatusCode.OK;
                     try
                     {
                         var response = await httpClient.PostAsync(githubApiUrl, new StringContent(string.Empty));
                         responseStatus = response.StatusCode;
+                        var githubRequestId = _dotcomServer.GetGitHubRequestId(response.Headers);
 
                         if (response.IsSuccessStatusCode)
                         {
-                            Trace.Info($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}'");
+                            Trace.Info($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}' ({githubRequestId})");
                             var jsonResponse = await response.Content.ReadAsStringAsync();
                             return StringUtil.ConvertFromJson<GitHubRunnerRegisterToken>(jsonResponse);
                         }
                         else
                         {
-                            _term.WriteError($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}'");
+                            _term.WriteError($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}' (Request Id: {githubRequestId})");
                             var errorResponse = await response.Content.ReadAsStringAsync();
                             _term.WriteError(errorResponse);
                             response.EnsureSuccessStatusCode();
                         }
                     }
-                    catch(Exception ex) when (retryCount < 2 && responseStatus != System.Net.HttpStatusCode.NotFound)
+                    catch (Exception ex) when (retryCount < 2 && responseStatus != System.Net.HttpStatusCode.NotFound)
                     {
                         retryCount++;
                         Trace.Error($"Failed to get JIT runner token -- Atempt: {retryCount}");
@@ -714,22 +772,23 @@ namespace GitHub.Runner.Listener.Configuration
                     {
                         var response = await httpClient.PostAsync(githubApiUrl, new StringContent(StringUtil.ConvertToJson(bodyObject), null, "application/json"));
                         responseStatus = response.StatusCode;
+                        var githubRequestId = _dotcomServer.GetGitHubRequestId(response.Headers);
 
-                        if(response.IsSuccessStatusCode)
+                        if (response.IsSuccessStatusCode)
                         {
-                            Trace.Info($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}'");
+                            Trace.Info($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}' ({githubRequestId})");
                             var jsonResponse = await response.Content.ReadAsStringAsync();
                             return StringUtil.ConvertFromJson<GitHubAuthResult>(jsonResponse);
                         }
                         else
                         {
-                            _term.WriteError($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}'");
+                            _term.WriteError($"Http response code: {response.StatusCode} from 'POST {githubApiUrl}' (Request Id: {githubRequestId})");
                             var errorResponse = await response.Content.ReadAsStringAsync();
                             _term.WriteError(errorResponse);
                             response.EnsureSuccessStatusCode();
                         }
                     }
-                    catch(Exception ex) when (retryCount < 2 && responseStatus != System.Net.HttpStatusCode.NotFound)
+                    catch (Exception ex) when (retryCount < 2 && responseStatus != System.Net.HttpStatusCode.NotFound)
                     {
                         retryCount++;
                         Trace.Error($"Failed to get tenant credentials -- Atempt: {retryCount}");

src/Runner.Listener/Configuration/CredentialManager.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Runtime.Serialization;
 using GitHub.Runner.Common;
@@ -20,8 +20,8 @@ namespace GitHub.Runner.Listener.Configuration
     {
         public static readonly Dictionary<string, Type> CredentialTypes = new(StringComparer.OrdinalIgnoreCase)
         {
-            { Constants.Configuration.OAuth, typeof(OAuthCredential)},
+            { Constants.Configuration.OAuth, typeof(OAuthCredential) },
-            { Constants.Configuration.OAuthAccessToken, typeof(OAuthAccessTokenCredential)},
+            { Constants.Configuration.OAuthAccessToken, typeof(OAuthAccessTokenCredential) },
         };
 
         public ICredentialProvider GetCredentialProvider(string credType)
@@ -93,6 +93,9 @@ namespace GitHub.Runner.Listener.Configuration
         [DataMember(Name = "token")]
         public string Token { get; set; }
 
+        [DataMember(Name = "use_v2_flow")]
+        public bool UseV2Flow { get; set; }
+
         public VssCredentials ToVssCredentials()
         {
             ArgUtil.NotNullOrEmpty(TokenSchema, nameof(TokenSchema));

src/Runner.Listener/InternalsVisibleTo.cs

@@ -0,0 +1,3 @@
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("Test")]

src/Runner.Listener/JobDispatcher.cs

@@ -7,6 +7,7 @@ using System.Text;
 using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
+using GitHub.DistributedTask.Pipelines;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Common;
 using GitHub.Runner.Common.Util;
@@ -14,6 +15,7 @@ using GitHub.Runner.Sdk;
 using GitHub.Services.Common;
 using GitHub.Services.WebApi;
 using GitHub.Services.WebApi.Jwt;
+using Sdk.RSWebApi.Contracts;
 using Pipelines = GitHub.DistributedTask.Pipelines;
 
 namespace GitHub.Runner.Listener
@@ -58,6 +60,8 @@ namespace GitHub.Runner.Listener
 
         public event EventHandler<JobStatusEventArgs> JobStatus;
 
+        private bool _isRunServiceJob;
+
         public override void Initialize(IHostContext hostContext)
         {
             base.Initialize(hostContext);
@@ -86,6 +90,8 @@ namespace GitHub.Runner.Listener
         {
             Trace.Info($"Job request {jobRequestMessage.RequestId} for plan {jobRequestMessage.Plan.PlanId} job {jobRequestMessage.JobId} received.");
 
+            _isRunServiceJob = MessageUtil.IsRunServiceJob(jobRequestMessage.MessageType);
+
             WorkerDispatcher currentDispatch = null;
             if (_jobDispatchedQueue.Count > 0)
             {
@@ -239,6 +245,13 @@ namespace GitHub.Runner.Listener
                     return;
                 }
 
+                if (this._isRunServiceJob)
+                {
+                    Trace.Error($"We are not yet checking the state of jobrequest {jobDispatch.JobId} status. Cancel running worker right away.");
+                    jobDispatch.WorkerCancellationTokenSource.Cancel();
+                    return;
+                }
+
                 // based on the current design, server will only send one job for a given runner at a time.
                 // if the runner received a new job request while a previous job request is still running, this typically indicates two situations
                 // 1. a runner bug caused a server and runner mismatch on the state of the job request, e.g. the runner didn't renew the jobrequest
@@ -360,6 +373,8 @@ namespace GitHub.Runner.Listener
                 TaskCompletionSource<int> firstJobRequestRenewed = new();
                 var notification = HostContext.GetService<IJobNotification>();
 
+                var systemConnection = message.Resources.Endpoints.SingleOrDefault(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
+
                 // lock renew cancellation token.
                 using (var lockRenewalTokenSource = new CancellationTokenSource())
                 using (var workerProcessCancelTokenSource = new CancellationTokenSource())
@@ -369,7 +384,7 @@ namespace GitHub.Runner.Listener
 
                     // start renew job request
                     Trace.Info($"Start renew job request {requestId} for job {message.JobId}.");
-                    Task renewJobRequest = RenewJobRequestAsync(_poolId, requestId, lockToken, orchestrationId, firstJobRequestRenewed, lockRenewalTokenSource.Token);
+                    Task renewJobRequest = RenewJobRequestAsync(message, systemConnection, _poolId, requestId, lockToken, orchestrationId, firstJobRequestRenewed, lockRenewalTokenSource.Token);
 
                     // wait till first renew succeed or job request is cancelled
                     // not even start worker if the first renew fail
@@ -391,7 +406,7 @@ namespace GitHub.Runner.Listener
                         await renewJobRequest;
 
                         // complete job request with result Cancelled
-                        await CompleteJobRequestAsync(_poolId, message, lockToken, TaskResult.Canceled);
+                        await CompleteJobRequestAsync(_poolId, message, systemConnection, lockToken, TaskResult.Canceled);
                         return;
                     }
 
@@ -426,7 +441,7 @@ namespace GitHub.Runner.Listener
                                                 {
                                                     workerOutput.Add(stdout.Data);
                                                 }
-                                                
+
                                                 if (printToStdout)
                                                 {
                                                     term.WriteLine(stdout.Data, skipTracing: true);
@@ -508,7 +523,6 @@ namespace GitHub.Runner.Listener
 
                         // we get first jobrequest renew succeed and start the worker process with the job message.
                         // send notification to machine provisioner.
-                        var systemConnection = message.Resources.Endpoints.SingleOrDefault(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
                         var accessToken = systemConnection?.Authorization?.Parameters["AccessToken"];
                         notification.JobStarted(message.JobId, accessToken, systemConnection.Url);
 
@@ -531,18 +545,14 @@ namespace GitHub.Runner.Listener
                                     detailInfo = string.Join(Environment.NewLine, workerOutput);
                                     Trace.Info($"Return code {returnCode} indicate worker encounter an unhandled exception or app crash, attach worker stdout/stderr to JobRequest result.");
 
-                                    var jobServer = HostContext.GetService<IJobServer>();
+                                    var jobServer = await InitializeJobServerAsync(systemConnection);
-                                    VssCredentials jobServerCredential = VssUtil.GetVssCredential(systemConnection);
-                                    VssConnection jobConnection = VssUtil.CreateConnection(systemConnection.Url, jobServerCredential);
-                                    await jobServer.ConnectAsync(jobConnection);
-
                                     await LogWorkerProcessUnhandledException(jobServer, message, detailInfo);
 
                                     // Go ahead to finish the job with result 'Failed' if the STDERR from worker is System.IO.IOException, since it typically means we are running out of disk space.
                                     if (detailInfo.Contains(typeof(System.IO.IOException).ToString(), StringComparison.OrdinalIgnoreCase))
                                     {
                                         Trace.Info($"Finish job with result 'Failed' due to IOException.");
-                                        await ForceFailJob(jobServer, message);
+                                        await ForceFailJob(jobServer, message, detailInfo);
                                     }
                                 }
 
@@ -557,7 +567,7 @@ namespace GitHub.Runner.Listener
                                 await renewJobRequest;
 
                                 // complete job request
-                                await CompleteJobRequestAsync(_poolId, message, lockToken, result, detailInfo);
+                                await CompleteJobRequestAsync(_poolId, message, systemConnection, lockToken, result, detailInfo);
 
                                 // print out unhandled exception happened in worker after we complete job request.
                                 // when we run out of disk space, report back to server has higher priority.
@@ -654,7 +664,7 @@ namespace GitHub.Runner.Listener
                             await renewJobRequest;
 
                             // complete job request
-                            await CompleteJobRequestAsync(_poolId, message, lockToken, resultOnAbandonOrCancel);
+                            await CompleteJobRequestAsync(_poolId, message, systemConnection, lockToken, resultOnAbandonOrCancel);
                         }
                         finally
                         {
@@ -675,9 +685,128 @@ namespace GitHub.Runner.Listener
             }
         }
 
-        public async Task RenewJobRequestAsync(int poolId, long requestId, Guid lockToken, string orchestrationId, TaskCompletionSource<int> firstJobRequestRenewed, CancellationToken token)
+        internal async Task RenewJobRequestAsync(Pipelines.AgentJobRequestMessage message, ServiceEndpoint systemConnection, int poolId, long requestId, Guid lockToken, string orchestrationId, TaskCompletionSource<int> firstJobRequestRenewed, CancellationToken token)
+        {
+            if (this._isRunServiceJob)
+            {
+                var runServer = await GetRunServerAsync(systemConnection);
+                await RenewJobRequestAsync(runServer, message.Plan.PlanId, message.JobId, firstJobRequestRenewed, token);
+            }
+            else
+            {
+                var runnerServer = HostContext.GetService<IRunnerServer>();
+                await RenewJobRequestAsync(runnerServer, poolId, requestId, lockToken, orchestrationId, firstJobRequestRenewed, token);
+            }
+        }
+
+        private async Task RenewJobRequestAsync(IRunServer runServer, Guid planId, Guid jobId, TaskCompletionSource<int> firstJobRequestRenewed, CancellationToken token)
+        {
+            TaskAgentJobRequest request = null;
+            int firstRenewRetryLimit = 5;
+            int encounteringError = 0;
+
+            // renew lock during job running.
+            // stop renew only if cancellation token for lock renew task been signal or exception still happen after retry.
+            while (!token.IsCancellationRequested)
+            {
+                try
+                {
+                    var renewResponse = await runServer.RenewJobAsync(planId, jobId, token);
+                    Trace.Info($"Successfully renew job {jobId}, job is valid till {renewResponse.LockedUntil}");
+
+                    if (!firstJobRequestRenewed.Task.IsCompleted)
+                    {
+                        // fire first renew succeed event.
+                        firstJobRequestRenewed.TrySetResult(0);
+                    }
+
+                    if (encounteringError > 0)
+                    {
+                        encounteringError = 0;
+                        HostContext.WritePerfCounter("JobRenewRecovered");
+                    }
+
+                    // renew again after 60 sec delay
+                    await HostContext.Delay(TimeSpan.FromSeconds(60), token);
+                }
+                catch (TaskOrchestrationJobNotFoundException)
+                {
+                    // no need for retry. the job is not valid anymore.
+                    Trace.Info($"TaskAgentJobNotFoundException received when renew job {jobId}, job is no longer valid, stop renew job request.");
+                    return;
+                }
+                catch (OperationCanceledException) when (token.IsCancellationRequested)
+                {
+                    // OperationCanceledException may caused by http timeout or _lockRenewalTokenSource.Cance();
+                    // Stop renew only on cancellation token fired.
+                    Trace.Info($"job renew has been cancelled, stop renew job {jobId}.");
+                    return;
+                }
+                catch (Exception ex)
+                {
+                    Trace.Error($"Catch exception during renew runner job {jobId}.");
+                    Trace.Error(ex);
+                    encounteringError++;
+
+                    // retry
+                    TimeSpan remainingTime = TimeSpan.Zero;
+                    if (!firstJobRequestRenewed.Task.IsCompleted)
+                    {
+                        // retry 5 times every 10 sec for the first renew
+                        if (firstRenewRetryLimit-- > 0)
+                        {
+                            remainingTime = TimeSpan.FromSeconds(10);
+                        }
+                    }
+                    else
+                    {
+                        // retry till reach lockeduntil + 5 mins extra buffer.
+                        remainingTime = request.LockedUntil.Value + TimeSpan.FromMinutes(5) - DateTime.UtcNow;
+                    }
+
+                    if (remainingTime > TimeSpan.Zero)
+                    {
+                        TimeSpan delayTime;
+                        if (!firstJobRequestRenewed.Task.IsCompleted)
+                        {
+                            Trace.Info($"Retrying lock renewal for job {jobId}. The first job renew request has failed.");
+                            delayTime = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(1), TimeSpan.FromSeconds(10));
+                        }
+                        else
+                        {
+                            Trace.Info($"Retrying lock renewal for job {jobId}. Job is valid until {request.LockedUntil.Value}.");
+                            if (encounteringError > 5)
+                            {
+                                delayTime = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(15), TimeSpan.FromSeconds(30));
+                            }
+                            else
+                            {
+                                delayTime = BackoffTimerHelper.GetRandomBackoff(TimeSpan.FromSeconds(5), TimeSpan.FromSeconds(15));
+                            }
+                        }
+
+                        try
+                        {
+                            // back-off before next retry.
+                            await HostContext.Delay(delayTime, token);
+                        }
+                        catch (OperationCanceledException) when (token.IsCancellationRequested)
+                        {
+                            Trace.Info($"job renew has been cancelled, stop renew job {jobId}.");
+                        }
+                    }
+                    else
+                    {
+                        Trace.Info($"Lock renewal has run out of retry, stop renew lock for job {jobId}.");
+                        HostContext.WritePerfCounter("JobRenewReachLimit");
+                        return;
+                    }
+                }
+            }
+        }
+
+        private async Task RenewJobRequestAsync(IRunnerServer runnerServer, int poolId, long requestId, Guid lockToken, string orchestrationId, TaskCompletionSource<int> firstJobRequestRenewed, CancellationToken token)
         {
-            var runnerServer = HostContext.GetService<IRunnerServer>();
             TaskAgentJobRequest request = null;
             int firstRenewRetryLimit = 5;
             int encounteringError = 0;
@@ -840,90 +969,93 @@ namespace GitHub.Runner.Listener
                 var systemConnection = message.Resources.Endpoints.SingleOrDefault(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection));
                 ArgUtil.NotNull(systemConnection, nameof(systemConnection));
 
-                var jobServer = HostContext.GetService<IJobServer>();
+                var server = await InitializeJobServerAsync(systemConnection);
-                VssCredentials jobServerCredential = VssUtil.GetVssCredential(systemConnection);
-                VssConnection jobConnection = VssUtil.CreateConnection(systemConnection.Url, jobServerCredential);
 
-                await jobServer.ConnectAsync(jobConnection);
+                if (server is IJobServer jobServer)
-
-                var timeline = await jobServer.GetTimelineAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, CancellationToken.None);
-
-                var updatedRecords = new List<TimelineRecord>();
-                var logPages = new Dictionary<Guid, Dictionary<int, string>>();
-                var logRecords = new Dictionary<Guid, TimelineRecord>();
-                foreach (var log in logs)
                 {
-                    var logName = Path.GetFileNameWithoutExtension(log);
+                    var timeline = await jobServer.GetTimelineAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, CancellationToken.None);
-                    var logNameParts = logName.Split('_', StringSplitOptions.RemoveEmptyEntries);
-                    if (logNameParts.Length != 3)
-                    {
-                        Trace.Warning($"log file '{log}' doesn't follow naming convension 'GUID_GUID_INT'.");
-                        continue;
-                    }
-                    var logPageSeperator = logName.IndexOf('_');
-                    var logRecordId = Guid.Empty;
-                    var pageNumber = 0;
 
-                    if (!Guid.TryParse(logNameParts[0], out Guid timelineId) || timelineId != timeline.Id)
+                    var updatedRecords = new List<TimelineRecord>();
+                    var logPages = new Dictionary<Guid, Dictionary<int, string>>();
+                    var logRecords = new Dictionary<Guid, TimelineRecord>();
+                    foreach (var log in logs)
                     {
-                        Trace.Warning($"log file '{log}' is not belongs to current job");
+                        var logName = Path.GetFileNameWithoutExtension(log);
-                        continue;
+                        var logNameParts = logName.Split('_', StringSplitOptions.RemoveEmptyEntries);
-                    }
+                        if (logNameParts.Length != 3)
-
-                    if (!Guid.TryParse(logNameParts[1], out logRecordId))
-                    {
-                        Trace.Warning($"log file '{log}' doesn't follow naming convension 'GUID_GUID_INT'.");
-                        continue;
-                    }
-
-                    if (!int.TryParse(logNameParts[2], out pageNumber))
-                    {
-                        Trace.Warning($"log file '{log}' doesn't follow naming convension 'GUID_GUID_INT'.");
-                        continue;
-                    }
-
-                    var record = timeline.Records.FirstOrDefault(x => x.Id == logRecordId);
-                    if (record != null)
-                    {
-                        if (!logPages.ContainsKey(record.Id))
                         {
-                            logPages[record.Id] = new Dictionary<int, string>();
+                            Trace.Warning($"log file '{log}' doesn't follow naming convension 'GUID_GUID_INT'.");
-                            logRecords[record.Id] = record;
+                            continue;
+                        }
+                        var logPageSeperator = logName.IndexOf('_');
+                        var logRecordId = Guid.Empty;
+                        var pageNumber = 0;
+
+                        if (!Guid.TryParse(logNameParts[0], out Guid timelineId) || timelineId != timeline.Id)
+                        {
+                            Trace.Warning($"log file '{log}' is not belongs to current job");
+                            continue;
                         }
 
-                        logPages[record.Id][pageNumber] = log;
+                        if (!Guid.TryParse(logNameParts[1], out logRecordId))
-                    }
-                }
-
-                foreach (var pages in logPages)
-                {
-                    var record = logRecords[pages.Key];
-                    if (record.Log == null)
-                    {
-                        // Create the log
-                        record.Log = await jobServer.CreateLogAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, new TaskLog(String.Format(@"logs\{0:D}", record.Id)), default(CancellationToken));
-
-                        // Need to post timeline record updates to reflect the log creation
-                        updatedRecords.Add(record.Clone());
-                    }
-
-                    for (var i = 1; i <= pages.Value.Count; i++)
-                    {
-                        var logFile = pages.Value[i];
-                        // Upload the contents
-                        using (FileStream fs = File.Open(logFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
                         {
-                            var logUploaded = await jobServer.AppendLogContentAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, record.Log.Id, fs, default(CancellationToken));
+                            Trace.Warning($"log file '{log}' doesn't follow naming convension 'GUID_GUID_INT'.");
+                            continue;
                         }
 
-                        Trace.Info($"Uploaded unfinished log '{logFile}' for current job.");
+                        if (!int.TryParse(logNameParts[2], out pageNumber))
-                        IOUtil.DeleteFile(logFile);
+                        {
+                            Trace.Warning($"log file '{log}' doesn't follow naming convension 'GUID_GUID_INT'.");
+                            continue;
+                        }
+
+                        var record = timeline.Records.FirstOrDefault(x => x.Id == logRecordId);
+                        if (record != null)
+                        {
+                            if (!logPages.ContainsKey(record.Id))
+                            {
+                                logPages[record.Id] = new Dictionary<int, string>();
+                                logRecords[record.Id] = record;
+                            }
+
+                            logPages[record.Id][pageNumber] = log;
+                        }
+                    }
+
+                    foreach (var pages in logPages)
+                    {
+                        var record = logRecords[pages.Key];
+                        if (record.Log == null)
+                        {
+                            // Create the log
+                            record.Log = await jobServer.CreateLogAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, new TaskLog(String.Format(@"logs\{0:D}", record.Id)), default(CancellationToken));
+
+                            // Need to post timeline record updates to reflect the log creation
+                            updatedRecords.Add(record.Clone());
+                        }
+
+                        for (var i = 1; i <= pages.Value.Count; i++)
+                        {
+                            var logFile = pages.Value[i];
+                            // Upload the contents
+                            using (FileStream fs = File.Open(logFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
+                            {
+                                var logUploaded = await jobServer.AppendLogContentAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, record.Log.Id, fs, default(CancellationToken));
+                            }
+
+                            Trace.Info($"Uploaded unfinished log '{logFile}' for current job.");
+                            IOUtil.DeleteFile(logFile);
+                        }
+                    }
+
+                    if (updatedRecords.Count > 0)
+                    {
+                        await jobServer.UpdateTimelineRecordsAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, updatedRecords, CancellationToken.None);
                     }
                 }
-
+                else
-                if (updatedRecords.Count > 0)
                 {
-                    await jobServer.UpdateTimelineRecordsAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, updatedRecords, CancellationToken.None);
+                    Trace.Info("Job server does not support log upload yet.");
                 }
             }
             catch (Exception ex)
@@ -933,7 +1065,7 @@ namespace GitHub.Runner.Listener
             }
         }
 
-        private async Task CompleteJobRequestAsync(int poolId, Pipelines.AgentJobRequestMessage message, Guid lockToken, TaskResult result, string detailInfo = null)
+        private async Task CompleteJobRequestAsync(int poolId, Pipelines.AgentJobRequestMessage message, ServiceEndpoint systemConnection, Guid lockToken, TaskResult result, string detailInfo = null)
         {
             Trace.Entering();
 
@@ -943,6 +1075,28 @@ namespace GitHub.Runner.Listener
                 return;
             }
 
+            if (this._isRunServiceJob)
+            {
+                var runServer = await GetRunServerAsync(systemConnection);
+                var unhandledExceptionIssue = new Issue() { Type = IssueType.Error, Message = detailInfo };
+                var unhandledAnnotation = unhandledExceptionIssue.ToAnnotation();
+                var jobAnnotations = new List<Annotation>();
+                if (unhandledAnnotation.HasValue)
+                {
+                    jobAnnotations.Add(unhandledAnnotation.Value);
+                }
+                try
+                {
+                    await runServer.CompleteJobAsync(message.Plan.PlanId, message.JobId, result, outputs: null, stepResults: null, jobAnnotations: jobAnnotations, CancellationToken.None);
+                }
+                catch (Exception ex)
+                {
+                    Trace.Error("Fail to raise job completion back to service.");
+                    Trace.Error(ex);
+                }
+                return;
+            }
+
             var runnerServer = HostContext.GetService<IRunnerServer>();
             int completeJobRequestRetryLimit = 5;
             List<Exception> exceptions = new();
@@ -979,66 +1133,102 @@ namespace GitHub.Runner.Listener
         }
 
         // log an error issue to job level timeline record
-        private async Task LogWorkerProcessUnhandledException(IJobServer jobServer, Pipelines.AgentJobRequestMessage message, string errorMessage)
+        private async Task LogWorkerProcessUnhandledException(IRunnerService server, Pipelines.AgentJobRequestMessage message, string detailInfo)
         {
-            try
+            if (server is IJobServer jobServer)
             {
-                var timeline = await jobServer.GetTimelineAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, CancellationToken.None);
-                ArgUtil.NotNull(timeline, nameof(timeline));
-
-                TimelineRecord jobRecord = timeline.Records.FirstOrDefault(x => x.Id == message.JobId && x.RecordType == "Job");
-                ArgUtil.NotNull(jobRecord, nameof(jobRecord));
-
                 try
                 {
-                    if (!string.IsNullOrEmpty(errorMessage) &&
+                    var timeline = await jobServer.GetTimelineAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, CancellationToken.None);
-                        message.Variables.TryGetValue("DistributedTask.EnableRunnerIPCDebug", out var enableRunnerIPCDebug) &&
+                    ArgUtil.NotNull(timeline, nameof(timeline));
-                        StringUtil.ConvertToBoolean(enableRunnerIPCDebug.Value))
+
-                    {
+                    TimelineRecord jobRecord = timeline.Records.FirstOrDefault(x => x.Id == message.JobId && x.RecordType == "Job");
-                        // the trace should be best effort and not affect any job result
+                    ArgUtil.NotNull(jobRecord, nameof(jobRecord));
-                        var match = _invalidJsonRegex.Match(errorMessage);
+
-                        if (match.Success &&
+                    var unhandledExceptionIssue = new Issue() { Type = IssueType.Error, Message = detailInfo };
-                            match.Groups.Count == 2)
+                    unhandledExceptionIssue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.WorkerCrash;
-                        {
+                    jobRecord.ErrorCount++;
-                            var jsonPosition = int.Parse(match.Groups[1].Value);
+                    jobRecord.Issues.Add(unhandledExceptionIssue);
-                            var serializedJobMessage = JsonUtility.ToString(message);
+
-                            var originalJson = serializedJobMessage.Substring(jsonPosition - 10, 20);
+                    await jobServer.UpdateTimelineRecordsAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, new TimelineRecord[] { jobRecord }, CancellationToken.None);
-                            errorMessage = $"Runner sent Json at position '{jsonPosition}': {originalJson} ({Convert.ToBase64String(Encoding.UTF8.GetBytes(originalJson))})\n{errorMessage}";
-                        }
-                    }
                 }
                 catch (Exception ex)
                 {
+                    Trace.Error("Fail to report unhandled exception from Runner.Worker process");
                     Trace.Error(ex);
-                    errorMessage = $"Fail to check json IPC error: {ex.Message}\n{errorMessage}";
                 }
-
-                var unhandledExceptionIssue = new Issue() { Type = IssueType.Error, Message = errorMessage };
-                unhandledExceptionIssue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.WorkerCrash;
-                jobRecord.ErrorCount++;
-                jobRecord.Issues.Add(unhandledExceptionIssue);
-                await jobServer.UpdateTimelineRecordsAsync(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, message.Timeline.Id, new TimelineRecord[] { jobRecord }, CancellationToken.None);
             }
-            catch (Exception ex)
+            else
             {
-                Trace.Error("Fail to report unhandled exception from Runner.Worker process");
+                Trace.Info("Job server does not support handling unhandled exception yet, error message: {0}", detailInfo);
-                Trace.Error(ex);
+                return;
             }
         }
 
         // raise job completed event to fail the job.
-        private async Task ForceFailJob(IJobServer jobServer, Pipelines.AgentJobRequestMessage message)
+        private async Task ForceFailJob(IRunnerService server, Pipelines.AgentJobRequestMessage message, string detailInfo)
         {
-            try
+            if (server is IJobServer jobServer)
             {
-                var jobCompletedEvent = new JobCompletedEvent(message.RequestId, message.JobId, TaskResult.Failed);
+                try
-                await jobServer.RaisePlanEventAsync<JobCompletedEvent>(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, jobCompletedEvent, CancellationToken.None);
+                {
+                    var jobCompletedEvent = new JobCompletedEvent(message.RequestId, message.JobId, TaskResult.Failed);
+                    await jobServer.RaisePlanEventAsync<JobCompletedEvent>(message.Plan.ScopeIdentifier, message.Plan.PlanType, message.Plan.PlanId, jobCompletedEvent, CancellationToken.None);
+                }
+                catch (Exception ex)
+                {
+                    Trace.Error("Fail to raise JobCompletedEvent back to service.");
+                    Trace.Error(ex);
+                }
             }
-            catch (Exception ex)
+            else if (server is IRunServer runServer)
             {
-                Trace.Error("Fail to raise JobCompletedEvent back to service.");
+                try
-                Trace.Error(ex);
+                {
+                    var unhandledExceptionIssue = new Issue() { Type = IssueType.Error, Message = detailInfo };
+                    var unhandledAnnotation = unhandledExceptionIssue.ToAnnotation();
+                    var jobAnnotations = new List<Annotation>();
+                    if (unhandledAnnotation.HasValue)
+                    {
+                        jobAnnotations.Add(unhandledAnnotation.Value);
+                    }
+
+                    await runServer.CompleteJobAsync(message.Plan.PlanId, message.JobId, TaskResult.Failed, outputs: null, stepResults: null, jobAnnotations: jobAnnotations, CancellationToken.None);
+                }
+                catch (Exception ex)
+                {
+                    Trace.Error("Fail to raise job completion back to service.");
+                    Trace.Error(ex);
+                }
             }
+            else
+            {
+                throw new NotSupportedException($"Server type {server.GetType().FullName} is not supported.");
+            }
+        }
+
+        private async Task<IRunnerService> InitializeJobServerAsync(ServiceEndpoint systemConnection)
+        {
+            if (this._isRunServiceJob)
+            {
+                return await GetRunServerAsync(systemConnection);
+            }
+            else
+            {
+                var jobServer = HostContext.GetService<IJobServer>();
+                VssCredentials jobServerCredential = VssUtil.GetVssCredential(systemConnection);
+                VssConnection jobConnection = VssUtil.CreateConnection(systemConnection.Url, jobServerCredential);
+                await jobServer.ConnectAsync(jobConnection);
+                return jobServer;
+            }
+        }
+
+        private async Task<IRunServer> GetRunServerAsync(ServiceEndpoint systemConnection)
+        {
+            var runServer = HostContext.GetService<IRunServer>();
+            VssCredentials jobServerCredential = VssUtil.GetVssCredential(systemConnection);
+            await runServer.ConnectAsync(systemConnection.Url, jobServerCredential);
+            return runServer;
         }
 
         private class WorkerDispatcher : IDisposable

src/Runner.Listener/MessageListener.cs

@@ -182,7 +182,7 @@ namespace GitHub.Runner.Listener
                 try
                 {
                     _getMessagesTokenSource?.Cancel();
-                } 
+                }
                 catch (ObjectDisposedException)
                 {
                     Trace.Info("_getMessagesTokenSource is already disposed.");
@@ -245,6 +245,10 @@ namespace GitHub.Runner.Listener
                     _accessTokenRevoked = true;
                     throw;
                 }
+                catch (AccessDeniedException e) when (e.InnerException is InvalidTaskAgentVersionException)
+                {
+                    throw;
+                }
                 catch (Exception ex)
                 {
                     Trace.Error("Catch exception during get next message.");
@@ -289,7 +293,7 @@ namespace GitHub.Runner.Listener
                         await HostContext.Delay(_getNextMessageRetryInterval, token);
                     }
                 }
-                finally 
+                finally
                 {
                     _getMessagesTokenSource.Dispose();
                 }

src/Runner.Listener/Program.cs

@@ -6,6 +6,7 @@ using System.IO;
 using System.Reflection;
 using System.Runtime.InteropServices;
 using System.Threading.Tasks;
+using GitHub.DistributedTask.WebApi;
 
 namespace GitHub.Runner.Listener
 {
@@ -58,7 +59,7 @@ namespace GitHub.Runner.Listener
                         terminal.WriteLine("This runner version is built for Windows. Please install a correct build for your OS.");
                         return Constants.Runner.ReturnCode.TerminatedError;
                     }
-                    #if ARM64
+#if ARM64
                         // A little hacky, but windows gives no way to differentiate between windows 10 and 11.
                         // By default only 11 supports native x64 app emulation on arm, so we only want to support windows 11
                         // https://docs.microsoft.com/en-us/windows/arm/overview#build-windows-apps-that-run-on-arm
@@ -69,7 +70,7 @@ namespace GitHub.Runner.Listener
                             terminal.WriteLine("Win-arm64 runners require windows 11 or later. Please upgrade your operating system.");
                             return Constants.Runner.ReturnCode.TerminatedError;
                         }
-                    #endif
+#endif
                     break;
                 default:
                     terminal.WriteLine($"Running the runner on this platform is not supported. The current platform is {RuntimeInformation.OSDescription} and it was built for {Constants.Runner.Platform.ToString()}.");
@@ -137,6 +138,12 @@ namespace GitHub.Runner.Listener
                 }
 
             }
+            catch (AccessDeniedException e) when (e.InnerException is InvalidTaskAgentVersionException)
+            {
+                terminal.WriteError($"An error occured: {e.Message}");
+                trace.Error(e);
+                return Constants.Runner.ReturnCode.TerminatedError;
+            }
             catch (Exception e)
             {
                 terminal.WriteError($"An error occurred: {e.Message}");

src/Runner.Listener/Runner.cs

@@ -4,11 +4,13 @@ using System.IO;
 using System.Linq;
 using System.Reflection;
 using System.Runtime.CompilerServices;
+using System.Security.Cryptography;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Common;
+using GitHub.Runner.Common.Util;
 using GitHub.Runner.Listener.Check;
 using GitHub.Runner.Listener.Configuration;
 using GitHub.Runner.Sdk;
@@ -135,6 +137,12 @@ namespace GitHub.Runner.Listener
                 // remove config files, remove service, and exit
                 if (command.Remove)
                 {
+                    // only remove local config files and exit
+                    if (command.RemoveLocalConfig)
+                    {
+                        configManager.DeleteLocalRunnerConfig();
+                        return Constants.Runner.ReturnCode.Success;
+                    }
                     try
                     {
                         await configManager.UnconfigureAsync(command);
@@ -203,10 +211,16 @@ namespace GitHub.Runner.Listener
                         foreach (var config in jitConfig)
                         {
                             var configFile = Path.Combine(HostContext.GetDirectory(WellKnownDirectory.Root), config.Key);
-                            var configContent = Encoding.UTF8.GetString(Convert.FromBase64String(config.Value));
+                            var configContent = Convert.FromBase64String(config.Value);
-                            File.WriteAllText(configFile, configContent, Encoding.UTF8);
+#if OS_WINDOWS
+                            if (configFile == HostContext.GetConfigFile(WellKnownConfigFile.RSACredentials))
+                            {
+                                configContent = ProtectedData.Protect(configContent, null, DataProtectionScope.LocalMachine);
+                            }
+#endif
+                            File.WriteAllBytes(configFile, configContent);
                             File.SetAttributes(configFile, File.GetAttributes(configFile) | FileAttributes.Hidden);
-                            Trace.Info($"Save {configContent.Length} chars to '{configFile}'.");
+                            Trace.Info($"Saved {configContent.Length} bytes to '{configFile}'.");
                         }
                     }
                     catch (Exception ex)
@@ -325,13 +339,26 @@ namespace GitHub.Runner.Listener
             }
         }
 
+        private IMessageListener GetMesageListener(RunnerSettings settings)
+        {
+            if (settings.UseV2Flow)
+            {
+                Trace.Info($"Using BrokerMessageListener");
+                var brokerListener = new BrokerMessageListener();
+                brokerListener.Initialize(HostContext);
+                return brokerListener;
+            }
+
+            return HostContext.GetService<IMessageListener>();
+        }
+
         //create worker manager, create message listener and start listening to the queue
         private async Task<int> RunAsync(RunnerSettings settings, bool runOnce = false)
         {
             try
             {
                 Trace.Info(nameof(RunAsync));
-                _listener = HostContext.GetService<IMessageListener>();
+                _listener = GetMesageListener(settings);
                 if (!await _listener.CreateSessionAsync(HostContext.RunnerShutdownToken))
                 {
                     return Constants.Runner.ReturnCode.TerminatedError;
@@ -496,7 +523,7 @@ namespace GitHub.Runner.Listener
                                 }
                             }
                             // Broker flow
-                            else if (string.Equals(message.MessageType, JobRequestMessageTypes.RunnerJobRequest, StringComparison.OrdinalIgnoreCase))
+                            else if (MessageUtil.IsRunServiceJob(message.MessageType))
                             {
                                 if (autoUpdateInProgress || runOnceJobReceived)
                                 {
@@ -522,7 +549,17 @@ namespace GitHub.Runner.Listener
                                     {
                                         var runServer = HostContext.CreateService<IRunServer>();
                                         await runServer.ConnectAsync(new Uri(messageRef.RunServiceUrl), creds);
-                                        jobRequestMessage = await runServer.GetJobMessageAsync(messageRef.RunnerRequestId, messageQueueLoopTokenSource.Token);
+                                        try
+                                        {
+                                            jobRequestMessage =
+                                            await runServer.GetJobMessageAsync(messageRef.RunnerRequestId,
+                                            messageQueueLoopTokenSource.Token);
+                                        }
+                                        catch (TaskOrchestrationJobAlreadyAcquiredException)
+                                        {
+                                            Trace.Info("Job is already acquired, skip this message.");
+                                            continue;
+                                        }
                                     }
 
                                     jobDispatcher.Run(jobRequestMessage, runOnce);
@@ -646,7 +683,9 @@ Config Options:
  --token string         Registration token. Required if unattended
  --name string          Name of the runner to configure (default {Environment.MachineName ?? "myrunner"})
  --runnergroup string   Name of the runner group to add this runner to (defaults to the default runner group)
- --labels string        Extra labels in addition to the default: 'self-hosted,{Constants.Runner.Platform},{Constants.Runner.PlatformArchitecture}'
+ --labels string        Custom labels that will be added to the runner. This option is mandatory if --no-default-labels is used.
+ --no-default-labels    Disables adding the default labels: 'self-hosted,{Constants.Runner.Platform},{Constants.Runner.PlatformArchitecture}'
+ --local                Removes the runner config files from your local machine. Used as an option to the remove command
  --work string          Relative runner work directory (default {Constants.Path.WorkDirectory})
  --replace              Replace any existing runner with the same name (default false)
  --pat                  GitHub personal access token with repo scope. Used for checking network connectivity when executing `.{separator}run.{ext} --check`

src/Runner.Sdk/ActionPlugin.cs

@@ -73,7 +73,7 @@ namespace GitHub.Runner.Sdk
         {
             var headerValues = new List<ProductInfoHeaderValue>();
             headerValues.Add(new ProductInfoHeaderValue($"GitHubActionsRunner-Plugin", BuildConstants.RunnerPackage.Version));
-            headerValues.Add(new ProductInfoHeaderValue($"({RuntimeInformation.OSDescription.Trim()})"));
+            headerValues.Add(new ProductInfoHeaderValue($"({StringUtil.SanitizeUserAgentHeader(RuntimeInformation.OSDescription)})"));
 
             if (VssClientHttpRequestSettings.Default.UserAgent != null && VssClientHttpRequestSettings.Default.UserAgent.Count > 0)
             {

src/Runner.Sdk/ProcessInvoker.cs

@@ -264,7 +264,17 @@ namespace GitHub.Runner.Sdk
             {
                 foreach (KeyValuePair<string, string> kvp in environment)
                 {
+#if OS_WINDOWS
+                    string tempKey = String.IsNullOrWhiteSpace(kvp.Key) ? kvp.Key : kvp.Key.Split('\0')[0];
+                    string tempValue = String.IsNullOrWhiteSpace(kvp.Value) ? kvp.Value : kvp.Value.Split('\0')[0];
+                    if(!String.IsNullOrWhiteSpace(tempKey))
+                    {
+                         _proc.StartInfo.Environment[tempKey] = tempValue;
+                    }
+#else
                     _proc.StartInfo.Environment[kvp.Key] = kvp.Value;
+
+#endif
                 }
             }
 

src/Runner.Sdk/RunnerWebProxy.cs

@@ -164,7 +164,6 @@ namespace GitHub.Runner.Sdk
                         {
                             continue;
                         }
-
                         _noProxyList.Add(noProxyInfo);
                     }
                 }
@@ -207,6 +206,11 @@ namespace GitHub.Runner.Sdk
         {
             foreach (var noProxy in _noProxyList)
             {
+                // bypass on wildcard no_proxy
+                if (string.Equals(noProxy.Host, "*", StringComparison.OrdinalIgnoreCase))
+                {
+                    return true;
+                }
                 var matchHost = false;
                 var matchPort = false;
 

src/Runner.Sdk/Util/IOUtil.cs

@@ -40,10 +40,19 @@ namespace GitHub.Runner.Sdk
             File.WriteAllText(path, StringUtil.ConvertToJson(obj), Encoding.UTF8);
         }
 
-        public static T LoadObject<T>(string path)
+        public static T LoadObject<T>(string path, bool required = false)
         {
             string json = File.ReadAllText(path, Encoding.UTF8);
-            return StringUtil.ConvertFromJson<T>(json);
+            if (required && string.IsNullOrEmpty(json))
+            {
+                throw new ArgumentNullException($"File {path} is empty");
+            }
+            T result = StringUtil.ConvertFromJson<T>(json);
+            if (required && result == null)
+            {
+                throw new ArgumentException("Converting json to object resulted in a null value");
+            }
+            return result;
         }
 
         public static string GetSha256Hash(string path)

src/Runner.Sdk/Util/StringUtil.cs

@@ -123,5 +123,12 @@ namespace GitHub.Runner.Sdk
         {
             return value?.Substring(0, Math.Min(value.Length, count));
         }
+
+        // Fixes format violations e.g. https://github.com/actions/runner/issues/2165
+        public static string SanitizeUserAgentHeader(string header)
+        {
+            return header.Replace("(", "[").Replace(")", "]").Trim();
+        }
+
     }
 }

src/Runner.Sdk/Util/UrlUtil.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 
 namespace GitHub.Runner.Sdk
 {
@@ -6,9 +6,17 @@ namespace GitHub.Runner.Sdk
     {
         public static bool IsHostedServer(UriBuilder gitHubUrl)
         {
-            return string.Equals(gitHubUrl.Host, "github.com", StringComparison.OrdinalIgnoreCase) ||
+            if (StringUtil.ConvertToBoolean(Environment.GetEnvironmentVariable("GITHUB_ACTIONS_RUNNER_FORCE_GHES")))
+            {
+                return false;
+            }
+
+            return
+                string.Equals(gitHubUrl.Host, "github.com", StringComparison.OrdinalIgnoreCase) ||
                 string.Equals(gitHubUrl.Host, "www.github.com", StringComparison.OrdinalIgnoreCase) ||
-                string.Equals(gitHubUrl.Host, "github.localhost", StringComparison.OrdinalIgnoreCase);
+                string.Equals(gitHubUrl.Host, "github.localhost", StringComparison.OrdinalIgnoreCase) ||
+                gitHubUrl.Host.EndsWith(".ghe.localhost", StringComparison.OrdinalIgnoreCase) ||
+                gitHubUrl.Host.EndsWith(".ghe.com", StringComparison.OrdinalIgnoreCase);
         }
 
         public static Uri GetCredentialEmbeddedUrl(Uri baseUrl, string username, string password)

src/Runner.Sdk/Util/VssUtil.cs

@@ -19,7 +19,7 @@ namespace GitHub.Runner.Sdk
         {
             var headerValues = new List<ProductInfoHeaderValue>();
             headerValues.AddRange(additionalUserAgents);
-            headerValues.Add(new ProductInfoHeaderValue($"({RuntimeInformation.OSDescription.Trim()})"));
+            headerValues.Add(new ProductInfoHeaderValue($"({StringUtil.SanitizeUserAgentHeader(RuntimeInformation.OSDescription)})"));
 
             if (VssClientHttpRequestSettings.Default.UserAgent != null && VssClientHttpRequestSettings.Default.UserAgent.Count > 0)
             {
@@ -116,7 +116,7 @@ namespace GitHub.Runner.Sdk
             // settings are applied to an HttpRequestMessage.
             settings.AcceptLanguages.Remove(CultureInfo.InvariantCulture);
 
-            RawConnection connection = new(serverUri, new RawHttpMessageHandler(credentials.ToOAuthCredentials(), settings), additionalDelegatingHandler);
+            RawConnection connection = new(serverUri, new RawHttpMessageHandler(credentials.Federated, settings), additionalDelegatingHandler);
             return connection;
         }
 

src/Runner.Sdk/Util/WhichUtil.cs

@@ -60,7 +60,7 @@ namespace GitHub.Runner.Sdk
                             trace?.Verbose(ex.ToString());
                         }
 
-                        if (matches != null && matches.Length > 0)
+                        if (matches != null && matches.Length > 0 && IsPathValid(matches.First(), trace))
                         {
                             trace?.Info($"Location: '{matches.First()}'");
                             return matches.First();
@@ -86,7 +86,7 @@ namespace GitHub.Runner.Sdk
                             for (int i = 0; i < pathExtSegments.Length; i++)
                             {
                                 string fullPath = Path.Combine(pathSegment, $"{command}{pathExtSegments[i]}");
-                                if (matches.Any(p => p.Equals(fullPath, StringComparison.OrdinalIgnoreCase)))
+                                if (matches.Any(p => p.Equals(fullPath, StringComparison.OrdinalIgnoreCase)) && IsPathValid(fullPath, trace))
                                 {
                                     trace?.Info($"Location: '{fullPath}'");
                                     return fullPath;
@@ -105,7 +105,7 @@ namespace GitHub.Runner.Sdk
                         trace?.Verbose(ex.ToString());
                     }
 
-                    if (matches != null && matches.Length > 0)
+                    if (matches != null && matches.Length > 0 && IsPathValid(matches.First(), trace))
                     {
                         trace?.Info($"Location: '{matches.First()}'");
                         return matches.First();
@@ -128,5 +128,15 @@ namespace GitHub.Runner.Sdk
 
             return null;
         }
+
+        // checks if the file is a symlink and if the symlink`s target exists.
+        private static bool IsPathValid(string path, ITraceWriter trace = null)
+        {
+            var fileInfo = new FileInfo(path);
+            var linkTargetFullPath = fileInfo.Directory?.FullName + Path.DirectorySeparatorChar + fileInfo.LinkTarget;
+            if(fileInfo.LinkTarget == null || File.Exists(linkTargetFullPath) || File.Exists(fileInfo.LinkTarget)) return true;
+            trace?.Info($"the target '{fileInfo.LinkTarget}' of the symbolic link '{path}', does not exist");
+            return false;
+        }
     }
 }

src/Runner.Worker/ActionCommandManager.cs

@@ -1,4 +1,4 @@
-using GitHub.DistributedTask.Pipelines.ContextData;
+using GitHub.DistributedTask.Pipelines.ContextData;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Worker.Container;
 using System;
@@ -276,7 +276,7 @@ namespace GitHub.Runner.Worker
                         Message = $"Can't update {blocked} environment variable using ::set-env:: command."
                     };
                     issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = $"{Constants.Runner.UnsupportedCommand}_{envName}";
-                    context.AddIssue(issue);
+                    context.AddIssue(issue, ExecutionContextLogOptions.Default);
 
                     return;
                 }
@@ -315,7 +315,7 @@ namespace GitHub.Runner.Worker
                     Message = String.Format(Constants.Runner.UnsupportedCommandMessage, this.Command)
                 };
                 issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.UnsupportedCommand;
-                context.AddIssue(issue);
+                context.AddIssue(issue, ExecutionContextLogOptions.Default);
             }
 
             if (!command.Properties.TryGetValue(SetOutputCommandProperties.Name, out string outputName) || string.IsNullOrEmpty(outputName))
@@ -350,7 +350,7 @@ namespace GitHub.Runner.Worker
                     Message = String.Format(Constants.Runner.UnsupportedCommandMessage, this.Command)
                 };
                 issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.UnsupportedCommand;
-                context.AddIssue(issue);
+                context.AddIssue(issue, ExecutionContextLogOptions.Default);
             }
 
             if (!command.Properties.TryGetValue(SaveStateCommandProperties.Name, out string stateName) || string.IsNullOrEmpty(stateName))
@@ -666,7 +666,7 @@ namespace GitHub.Runner.Worker
                 }
             }
 
-            context.AddIssue(issue);
+            context.AddIssue(issue, ExecutionContextLogOptions.Default);
         }
 
         public static void ValidateLinesAndColumns(ActionCommand command, IExecutionContext context)

src/Runner.Worker/ActionManager.cs

@@ -11,12 +11,14 @@ using System.Threading;
 using System.Threading.Tasks;
 using GitHub.DistributedTask.ObjectTemplating.Tokens;
 using GitHub.Runner.Common;
+using GitHub.Runner.Common.Util;
 using GitHub.Runner.Sdk;
 using GitHub.Runner.Worker.Container;
 using GitHub.Services.Common;
 using WebApi = GitHub.DistributedTask.WebApi;
 using Pipelines = GitHub.DistributedTask.Pipelines;
 using PipelineTemplateConstants = GitHub.DistributedTask.Pipelines.ObjectTemplating.PipelineTemplateConstants;
+using GitHub.DistributedTask.WebApi;
 
 namespace GitHub.Runner.Worker
 {
@@ -100,7 +102,19 @@ namespace GitHub.Runner.Worker
             }
             IEnumerable<Pipelines.ActionStep> actions = steps.OfType<Pipelines.ActionStep>();
             executionContext.Output("Prepare all required actions");
-            var result = await PrepareActionsRecursiveAsync(executionContext, state, actions, depth, rootStepId);
+            PrepareActionsState result = new PrepareActionsState();
+            try
+            {
+                result = await PrepareActionsRecursiveAsync(executionContext, state, actions, depth, rootStepId);
+            }
+            catch (FailedToResolveActionDownloadInfoException ex)
+            {
+                // Log the error and fail the PrepareActionsAsync Initialization.
+                Trace.Error($"Caught exception from PrepareActionsAsync Initialization: {ex}");
+                executionContext.InfrastructureError(ex.Message);
+                executionContext.Result = TaskResult.Failed;
+                throw;
+            }
             if (!FeatureManager.IsContainerHooksEnabled(executionContext.Global.Variables))
             {
                 if (state.ImagesToPull.Count > 0)
@@ -648,13 +662,21 @@ namespace GitHub.Runner.Worker
             }
 
             // Resolve download info
+            var launchServer = HostContext.GetService<ILaunchServer>();
             var jobServer = HostContext.GetService<IJobServer>();
             var actionDownloadInfos = default(WebApi.ActionDownloadInfoCollection);
             for (var attempt = 1; attempt <= 3; attempt++)
             {
                 try
                 {
-                    actionDownloadInfos = await jobServer.ResolveActionDownloadInfoAsync(executionContext.Global.Plan.ScopeIdentifier, executionContext.Global.Plan.PlanType, executionContext.Global.Plan.PlanId, executionContext.Root.Id, new WebApi.ActionReferenceList { Actions = actionReferences }, executionContext.CancellationToken);
+                    if (MessageUtil.IsRunServiceJob(executionContext.Global.Variables.Get(Constants.Variables.System.JobRequestType)))
+                    {
+                        actionDownloadInfos = await launchServer.ResolveActionsDownloadInfoAsync(executionContext.Global.Plan.PlanId, executionContext.Root.Id, new WebApi.ActionReferenceList { Actions = actionReferences }, executionContext.CancellationToken);
+                    }
+                    else
+                    {
+                        actionDownloadInfos = await jobServer.ResolveActionDownloadInfoAsync(executionContext.Global.Plan.ScopeIdentifier, executionContext.Global.Plan.PlanType, executionContext.Global.Plan.PlanId, executionContext.Root.Id, new WebApi.ActionReferenceList { Actions = actionReferences }, executionContext.CancellationToken);
+                    }
                     break;
                 }
                 catch (Exception ex) when (!executionContext.CancellationToken.IsCancellationRequested) // Do not retry if the run is cancelled.

src/Runner.Worker/ActionRunner.cs

@@ -25,7 +25,6 @@ namespace GitHub.Runner.Worker
     public interface IActionRunner : IStep, IRunnerService
     {
         ActionRunStage Stage { get; set; }
-        bool TryEvaluateDisplayName(DictionaryContextData contextData, IExecutionContext context);
         Pipelines.ActionStep Action { get; set; }
     }
 
@@ -285,25 +284,67 @@ namespace GitHub.Runner.Worker
 
         }
 
-        public bool TryEvaluateDisplayName(DictionaryContextData contextData, IExecutionContext context)
+        /// <summary>
+        /// Attempts to update the DisplayName.
+        /// As the "Try..." name implies, this method should never throw an exception.
+        /// Returns true if the DisplayName is already present or it was successfully updated.
+        /// </summary>
+        public bool TryUpdateDisplayName(out bool updated)
+        {
+            updated = false;
+
+            // REVIEW:  This try/catch can be removed if some future implementation of EvaluateDisplayName and UpdateTimelineRecordDisplayName
+            // can make reasonable guarantees that they won't throw an exception.
+            try
+            {
+                // This attempt is only worthwhile at the "Main" stage.
+                //    When the job starts, there's an initial attempt to evaluate the DisplayName.  (see JobExtension::InitializeJob)
+                //    During the "Pre" stage, we expect that no contexts will have changed since the initial evaluation.
+                //    "Main" stage is handled here.
+                //    During the "Post" stage, it no longer matters.
+                if (this.Stage == ActionRunStage.Main && EvaluateDisplayName(this.ExecutionContext.ExpressionValues, this.ExecutionContext, out updated))
+                {
+                    if (updated)
+                    {
+                        this.ExecutionContext.UpdateTimelineRecordDisplayName(this.DisplayName);
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                Trace.Warning("Caught exception while attempting to evaulate/update the step's DisplayName.  Exception Details:  {0}", ex);
+            }
+
+            // For consistency with other implementations of TryUpdateDisplayName we use !string.IsNullOrEmpty below,
+            // but note that (at the time of this writing) ActionRunner::DisplayName::get always returns a non-empty string due to its fallback logic.
+            // In other words, the net effect is that this particular implementation of TryUpdateDisplayName will always return true.
+            return !string.IsNullOrEmpty(this.DisplayName);
+        }
+
+
+        /// <summary>
+        /// Attempts to evaluate the DisplayName of this IActionRunner.
+        /// Returns true if the DisplayName is already present or it was successfully evaluated.
+        /// </summary>
+        public bool EvaluateDisplayName(DictionaryContextData contextData, IExecutionContext context, out bool updated)
         {
             ArgUtil.NotNull(context, nameof(context));
             ArgUtil.NotNull(Action, nameof(Action));
 
-            // If we have already expanded the display name, there is no need to expand it again
+            updated = false;
-            // TODO: Remove the ShouldEvaluateDisplayName check and field post m158 deploy, we should do it by default once the server is updated
+            // If we have already expanded the display name, don't bother attempting [re-]expansion.
             if (_didFullyEvaluateDisplayName || !string.IsNullOrEmpty(Action.DisplayName))
             {
-                return false;
+                return true;
             }
 
-            bool didFullyEvaluate;
+            _displayName = GenerateDisplayName(Action, contextData, context, out bool didFullyEvaluate);
-            _displayName = GenerateDisplayName(Action, contextData, context, out didFullyEvaluate);
 
-            // If we evaluated fully mask any secrets
+            // If we evaluated, fully mask any secrets
             if (didFullyEvaluate)
             {
                 _displayName = HostContext.SecretMasker.MaskSecrets(_displayName);
+                updated = true;
             }
             context.Debug($"Set step '{Action.Name}' display name to: '{_displayName}'");
             _didFullyEvaluateDisplayName = didFullyEvaluate;

src/Runner.Worker/Container/ContainerHooks/HookInput.cs

@@ -83,7 +83,7 @@ namespace GitHub.Runner.Worker.Container.ContainerHooks
         public HookContainer(ContainerInfo container)
         {
             Image = container.ContainerImage;
-            EntryPointArgs = container.ContainerEntryPointArgs?.Split(' ').Select(arg => arg.Trim()) ?? new List<string>();
+            EntryPointArgs = container.ContainerEntryPointArgs?.Split(' ').Select(arg => arg.Trim()).Where(arg => !string.IsNullOrEmpty(arg)) ?? new List<string>();
             EntryPoint = container.ContainerEntryPoint;
             WorkingDirectory = container.ContainerWorkDirectory;
             CreateOptions = container.ContainerCreateOptions;

src/Runner.Worker/ContainerOperationProvider.cs

@@ -33,8 +33,14 @@ namespace GitHub.Runner.Worker
         public override void Initialize(IHostContext hostContext)
         {
             base.Initialize(hostContext);
-            _dockerManager = HostContext.GetService<IDockerCommandManager>();
+            if (string.IsNullOrEmpty(Environment.GetEnvironmentVariable(Constants.Hooks.ContainerHooksPath)))
-            _containerHookManager = HostContext.GetService<IContainerHookManager>();
+            {
+                _dockerManager = HostContext.GetService<IDockerCommandManager>();
+            }
+            else
+            {
+                _containerHookManager = HostContext.GetService<IContainerHookManager>();
+            }
         }
 
         public async Task StartContainersAsync(IExecutionContext executionContext, object data)

src/Runner.Worker/ExecutionContext.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
@@ -6,6 +6,7 @@ using System.Linq;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
+using GitHub.Actions.RunService.WebApi;
 using GitHub.DistributedTask.Expressions2;
 using GitHub.DistributedTask.ObjectTemplating.Tokens;
 using GitHub.DistributedTask.Pipelines.ContextData;
@@ -17,15 +18,22 @@ using GitHub.Runner.Sdk;
 using GitHub.Runner.Worker.Container;
 using GitHub.Runner.Worker.Handlers;
 using Newtonsoft.Json;
+using Sdk.RSWebApi.Contracts;
 using ObjectTemplating = GitHub.DistributedTask.ObjectTemplating;
 using Pipelines = GitHub.DistributedTask.Pipelines;
 
 namespace GitHub.Runner.Worker
 {
-    public class ExecutionContextType
+    public static class ExecutionContextType
     {
-        public static string Job = "Job";
+        public const string Job = "Job";
-        public static string Task = "Task";
+        public const string Task = "Task";
+    }
+
+    public record ExecutionContextLogOptions(bool WriteToLog, string LogMessageOverride)
+    {
+        public static readonly ExecutionContextLogOptions None = new(false, null);
+        public static readonly ExecutionContextLogOptions Default = new(true, null);
     }
 
     [ServiceLocator(Default = typeof(ExecutionContext))]
@@ -80,7 +88,7 @@ namespace GitHub.Runner.Worker
         // logging
         long Write(string tag, string message);
         void QueueAttachFile(string type, string name, string filePath);
-        void QueueSummaryFile(string name, string filePath, string stepId);
+        void QueueSummaryFile(string name, string filePath, Guid stepRecordId);
 
         // timeline record update methods
         void Start(string currentOperation = null);
@@ -91,7 +99,7 @@ namespace GitHub.Runner.Worker
         void SetGitHubContext(string name, string value);
         void SetOutput(string name, string value, out string reference);
         void SetTimeout(TimeSpan? timeout);
-        void AddIssue(Issue issue, string message = null);
+        void AddIssue(Issue issue, ExecutionContextLogOptions logOptions);
         void Progress(int percentage, string currentOperation = null);
         void UpdateDetailTimelineRecord(TimelineRecord record);
 
@@ -117,7 +125,7 @@ namespace GitHub.Runner.Worker
 
     public sealed class ExecutionContext : RunnerService, IExecutionContext
     {
-        private const int _maxIssueCount = 10;
+        private const int _maxCountPerIssueType = 10;
         private const int _throttlingDelayReportThreshold = 10 * 1000; // Don't report throttling with less than 10 seconds delay
         private const int _maxIssueMessageLength = 4096; // Don't send issue with huge message since we can't forward them from actions to check annotation.
         private const int _maxIssueCountInTelemetry = 3; // Only send the first 3 issues to telemetry
@@ -125,8 +133,10 @@ namespace GitHub.Runner.Worker
 
         private readonly TimelineRecord _record = new();
         private readonly Dictionary<Guid, TimelineRecord> _detailRecords = new();
+        private readonly List<Issue> _embeddedIssueCollector;
         private readonly object _loggerLock = new();
         private readonly object _matchersLock = new();
+        private readonly ExecutionContext _parentExecutionContext;
 
         private event OnMatcherChanged _onMatcherChanged;
 
@@ -134,7 +144,6 @@ namespace GitHub.Runner.Worker
 
         private IPagingLogger _logger;
         private IJobServerQueue _jobServerQueue;
-        private ExecutionContext _parentExecutionContext;
 
         private Guid _mainTimelineId;
         private Guid _detailTimelineId;
@@ -148,6 +157,29 @@ namespace GitHub.Runner.Worker
         private long _totalThrottlingDelayInMilliseconds = 0;
         private bool _stepTelemetryPublished = false;
 
+        public ExecutionContext()
+            : this(parent: null, embedded: false)
+        {
+        }
+
+        private ExecutionContext(ExecutionContext parent, bool embedded)
+        {
+            if (embedded)
+            {
+                ArgUtil.NotNull(parent, nameof(parent));
+            }
+
+            _parentExecutionContext = parent;
+            this.IsEmbedded = embedded;
+            this.StepTelemetry = new ActionsStepTelemetry
+            {
+                IsEmbedded = embedded
+            };
+
+            //Embedded Execution Contexts pseudo-inherit their parent's embeddedIssueCollector.
+            _embeddedIssueCollector = embedded ? parent._embeddedIssueCollector : new();
+        }
+
         public Guid Id => _record.Id;
         public Guid EmbeddedId { get; private set; }
         public string ScopeName { get; private set; }
@@ -160,7 +192,7 @@ namespace GitHub.Runner.Worker
         public Dictionary<string, VariableValue> JobOutputs { get; private set; }
 
         public ActionsEnvironmentReference ActionsEnvironment { get; private set; }
-        public ActionsStepTelemetry StepTelemetry { get; } = new ActionsStepTelemetry();
+        public ActionsStepTelemetry StepTelemetry { get; private init; }
         public DictionaryContextData ExpressionValues { get; } = new DictionaryContextData();
         public IList<IFunctionInfo> ExpressionFunctions { get; } = new List<IFunctionInfo>();
 
@@ -185,7 +217,7 @@ namespace GitHub.Runner.Worker
 
         // An embedded execution context shares the same record ID, record name, and logger
         // as its enclosing execution context.
-        public bool IsEmbedded { get; private set; }
+        public bool IsEmbedded { get; private init; }
 
         public TaskResult? Result
         {
@@ -320,7 +352,7 @@ namespace GitHub.Runner.Worker
         {
             Trace.Entering();
 
-            var child = new ExecutionContext();
+            var child = new ExecutionContext(this, isEmbedded);
             child.Initialize(HostContext);
             child.Global = Global;
             child.ScopeName = scopeName;
@@ -345,7 +377,6 @@ namespace GitHub.Runner.Worker
                 child.ExpressionFunctions.Add(item);
             }
             child._cancellationTokenSource = cancellationTokenSource ?? new CancellationTokenSource();
-            child._parentExecutionContext = this;
             child.EchoOnActionCommand = EchoOnActionCommand;
 
             if (recordOrder != null)
@@ -366,11 +397,9 @@ namespace GitHub.Runner.Worker
                 child._logger.Setup(_mainTimelineId, recordId);
             }
 
-            child.IsEmbedded = isEmbedded;
             child.StepTelemetry.StepId = recordId;
             child.StepTelemetry.Stage = stage.ToString();
-            child.StepTelemetry.IsEmbedded = isEmbedded;
+            child.StepTelemetry.StepContextName = child.GetFullyQualifiedContextName();
-            child.StepTelemetry.StepContextName = child.GetFullyQualifiedContextName(); ;
 
             return child;
         }
@@ -412,13 +441,24 @@ namespace GitHub.Runner.Worker
                 this.Warning($"The job has experienced {TimeSpan.FromMilliseconds(_totalThrottlingDelayInMilliseconds).TotalSeconds} seconds total delay caused by server throttling.");
             }
 
+            DateTime now = DateTime.UtcNow;
             _record.CurrentOperation = currentOperation ?? _record.CurrentOperation;
             _record.ResultCode = resultCode ?? _record.ResultCode;
-            _record.FinishTime = DateTime.UtcNow;
+            _record.FinishTime = now;
             _record.PercentComplete = 100;
             _record.Result = _record.Result ?? TaskResult.Succeeded;
             _record.State = TimelineRecordState.Completed;
 
+            // Before our main timeline's final QueueTimelineRecordUpdate,
+            //    inject any issues collected by embedded ExecutionContexts.
+            if (!this.IsEmbedded)
+            {
+                foreach (var issue in _embeddedIssueCollector)
+                {
+                    AddIssue(issue, ExecutionContextLogOptions.None);
+                }
+            }
+
             _jobServerQueue.QueueTimelineRecordUpdate(_mainTimelineId, _record);
 
             // complete all detail timeline records.
@@ -426,7 +466,7 @@ namespace GitHub.Runner.Worker
             {
                 foreach (var record in _detailRecords)
                 {
-                    record.Value.FinishTime = record.Value.FinishTime ?? DateTime.UtcNow;
+                    record.Value.FinishTime = record.Value.FinishTime ?? now;
                     record.Value.PercentComplete = record.Value.PercentComplete ?? 100;
                     record.Value.Result = record.Value.Result ?? TaskResult.Succeeded;
                     record.Value.State = TimelineRecordState.Completed;
@@ -437,6 +477,29 @@ namespace GitHub.Runner.Worker
 
             PublishStepTelemetry();
 
+            var stepResult = new StepResult
+            {
+                ExternalID = _record.Id,
+                Conclusion = _record.Result ?? TaskResult.Succeeded,
+                Status = _record.State,
+                Number = _record.Order,
+                Name = _record.Name,
+                StartedAt = _record.StartTime,
+                CompletedAt = _record.FinishTime,
+                Annotations = new List<Annotation>()
+            };
+
+            _record.Issues?.ForEach(issue =>
+            {
+                var annotation = issue.ToAnnotation();
+                if (annotation != null)
+                {
+                    stepResult.Annotations.Add(annotation.Value);
+                }
+            });
+
+            Global.StepsResult.Add(stepResult);
+
             if (Root != this)
             {
                 // only dispose TokenSource for step level ExecutionContext
@@ -547,14 +610,10 @@ namespace GitHub.Runner.Worker
         }
 
         // This is not thread safe, the caller need to take lock before calling issue()
-        public void AddIssue(Issue issue, string logMessage = null)
+        public void AddIssue(Issue issue, ExecutionContextLogOptions logOptions)
         {
             ArgUtil.NotNull(issue, nameof(issue));
-
+            ArgUtil.NotNull(logOptions, nameof(logOptions));
-            if (string.IsNullOrEmpty(logMessage))
-            {
-                logMessage = issue.Message;
-            }
 
             issue.Message = HostContext.SecretMasker.MaskSecrets(issue.Message);
             if (issue.Message.Length > _maxIssueMessageLength)
@@ -569,53 +628,64 @@ namespace GitHub.Runner.Worker
                 issue.Data["stepNumber"] = _record.Order.ToString();
             }
 
-            if (issue.Type == IssueType.Error)
+            string wellKnownTag = null;
+            Int32 previousCountForIssueType = 0;
+            Action incrementIssueTypeCount = NoOp;
+            switch (issue.Type)
             {
-                if (!string.IsNullOrEmpty(logMessage))
+                case IssueType.Error:
-                {
+                    wellKnownTag = WellKnownTags.Error;
-                    long logLineNumber = Write(WellKnownTags.Error, logMessage);
+                    previousCountForIssueType = _record.ErrorCount;
-                    issue.Data["logFileLineNumber"] = logLineNumber.ToString();
+                    incrementIssueTypeCount = () => { _record.ErrorCount++; };
-                }
+                    break;
+                case IssueType.Warning:
+                    wellKnownTag = WellKnownTags.Warning;
+                    previousCountForIssueType = _record.WarningCount;
+                    incrementIssueTypeCount = () => { _record.WarningCount++; };
+                    break;
+                case IssueType.Notice:
+                    wellKnownTag = WellKnownTags.Notice;
+                    previousCountForIssueType = _record.NoticeCount;
+                    incrementIssueTypeCount = () => { _record.NoticeCount++; };
+                    break;
+            }
 
-                if (_record.ErrorCount < _maxIssueCount)
+            if (!string.IsNullOrEmpty(wellKnownTag))
+            {
+                if (!this.IsEmbedded && previousCountForIssueType < _maxCountPerIssueType)
                 {
+                    incrementIssueTypeCount();
                     _record.Issues.Add(issue);
                 }
 
-                _record.ErrorCount++;
+                if (logOptions.WriteToLog)
+                {
+                    string logMessage = issue.Message;
+                    if (!string.IsNullOrEmpty(logOptions.LogMessageOverride))
+                    {
+                        logMessage = logOptions.LogMessageOverride;
+                    }
+
+                    if (!string.IsNullOrEmpty(logMessage))
+                    {
+                        // Note that ::Write() has its own secret-masking logic.
+                        long logLineNumber = Write(wellKnownTag, logMessage);
+                        issue.Data["logFileLineNumber"] = logLineNumber.ToString();
+                    }
+                }
             }
-            else if (issue.Type == IssueType.Warning)
+
+            // Embedded ExecutionContexts (a.k.a. Composite actions) should never upload a timeline record to the server.
+            //    Instead, we store processed issues on a shared (psuedo-inherited) list (belonging to the closest
+            //    non-embedded ancestor ExecutionContext) so that they can be processed when that ancestor completes.
+            if (this.IsEmbedded)
             {
-                if (!string.IsNullOrEmpty(logMessage))
+                _embeddedIssueCollector.Add(issue);
-                {
-                    long logLineNumber = Write(WellKnownTags.Warning, logMessage);
-                    issue.Data["logFileLineNumber"] = logLineNumber.ToString();
-                }
-
-                if (_record.WarningCount < _maxIssueCount)
-                {
-                    _record.Issues.Add(issue);
-                }
-
-                _record.WarningCount++;
             }
-            else if (issue.Type == IssueType.Notice)
+            else
             {
-                if (!string.IsNullOrEmpty(logMessage))
+                _jobServerQueue.QueueTimelineRecordUpdate(_mainTimelineId, _record);
-                {
-                    long logLineNumber = Write(WellKnownTags.Notice, logMessage);
-                    issue.Data["logFileLineNumber"] = logLineNumber.ToString();
-                }
-
-                if (_record.NoticeCount < _maxIssueCount)
-                {
-                    _record.Issues.Add(issue);
-                }
-
-                _record.NoticeCount++;
             }
-
-            _jobServerQueue.QueueTimelineRecordUpdate(_mainTimelineId, _record);
         }
 
         public void UpdateDetailTimelineRecord(TimelineRecord record)
@@ -710,6 +780,12 @@ namespace GitHub.Runner.Worker
             // ActionsStepTelemetry for entire job
             Global.StepsTelemetry = new List<ActionsStepTelemetry>();
 
+            // Steps results for entire job
+            Global.StepsResult = new List<StepResult>();
+
+            // Job level annotations
+            Global.JobAnnotations = new List<Annotation>();
+
             // Job Outputs
             JobOutputs = new Dictionary<string, VariableValue>(StringComparer.OrdinalIgnoreCase);
 
@@ -726,6 +802,9 @@ namespace GitHub.Runner.Worker
             // File table
             Global.FileTable = new List<String>(message.FileTable ?? new string[0]);
 
+            // What type of job request is running (i.e. Run Service vs. pipelines)
+            Global.Variables.Set(Constants.Variables.System.JobRequestType, message.MessageType);
+
             // Expression values
             if (message.ContextData?.Count > 0)
             {
@@ -847,7 +926,7 @@ namespace GitHub.Runner.Worker
             _jobServerQueue.QueueFileUpload(_mainTimelineId, _record.Id, type, name, filePath, deleteSource: false);
         }
 
-        public void QueueSummaryFile(string name, string filePath, string stepId)
+        public void QueueSummaryFile(string name, string filePath, Guid stepRecordId)
         {
             ArgUtil.NotNullOrEmpty(name, nameof(name));
             ArgUtil.NotNullOrEmpty(filePath, nameof(filePath));
@@ -856,8 +935,7 @@ namespace GitHub.Runner.Worker
             {
                 throw new FileNotFoundException($"Can't upload (name:{name}) file: {filePath}. File does not exist.");
             }
-
+            _jobServerQueue.QueueResultsUpload(stepRecordId, name, filePath, ChecksAttachmentType.StepSummary, deleteSource: false, finalize: true, firstBlock: true, totalLines: 0);
-            _jobServerQueue.QueueSummaryUpload(_mainTimelineId, _record.Id, stepId, name, filePath, deleteSource: false);
         }
 
         // Add OnMatcherChanged
@@ -981,8 +1059,7 @@ namespace GitHub.Runner.Worker
                         StepTelemetry.FinishTime = _record.FinishTime;
                     }
 
-                    if (!IsEmbedded &&
+                    if (!IsEmbedded)
-                        _record.Issues.Count > 0)
                     {
                         foreach (var issue in _record.Issues)
                         {
@@ -1148,6 +1225,11 @@ namespace GitHub.Runner.Worker
 
             UpdateGlobalStepsContext();
         }
+
+        private static void NoOp()
+        {
+        }
+
     }
 
     // The Error/Warning/etc methods are created as extension methods to simplify unit testing.
@@ -1172,19 +1254,22 @@ namespace GitHub.Runner.Worker
         // Do not add a format string overload. See comment on ExecutionContext.Write().
         public static void Error(this IExecutionContext context, string message)
         {
-            context.AddIssue(new Issue() { Type = IssueType.Error, Message = message });
+            var issue = new Issue() { Type = IssueType.Error, Message = message };
+            context.AddIssue(issue, ExecutionContextLogOptions.Default);
         }
 
         // Do not add a format string overload. See comment on ExecutionContext.Write().
         public static void InfrastructureError(this IExecutionContext context, string message)
         {
-            context.AddIssue(new Issue() { Type = IssueType.Error, Message = message, IsInfrastructureIssue = true });
+            var issue = new Issue() { Type = IssueType.Error, Message = message, IsInfrastructureIssue = true };
+            context.AddIssue(issue, ExecutionContextLogOptions.Default);
         }
 
         // Do not add a format string overload. See comment on ExecutionContext.Write().
         public static void Warning(this IExecutionContext context, string message)
         {
-            context.AddIssue(new Issue() { Type = IssueType.Warning, Message = message });
+            var issue = new Issue() { Type = IssueType.Warning, Message = message };
+            context.AddIssue(issue, ExecutionContextLogOptions.Default);
         }
 
         // Do not add a format string overload. See comment on ExecutionContext.Write().

src/Runner.Worker/FileCommandManager.cs

@@ -208,20 +208,19 @@ namespace GitHub.Runner.Worker
                     ? context.Id.ToString()
                     : context.EmbeddedId.ToString();
 
+                Trace.Info($"Queueing file ({filePath}) for attachment upload ({attachmentName})");
+                // Attachments must be added to the parent context (job), not the current context (step)
+                context.Root.QueueAttachFile(ChecksAttachmentType.StepSummary, attachmentName, scrubbedFilePath);
+
+                // Dual upload the same files to Results Service
                 context.Global.Variables.TryGetValue("system.github.results_endpoint", out string resultsReceiverEndpoint);
                 if (resultsReceiverEndpoint != null)
                 {
                     Trace.Info($"Queueing results file ({filePath}) for attachment upload ({attachmentName})");
-                    var stepId = context.Id.ToString();
+                    var stepId = context.Id;
                     // Attachments must be added to the parent context (job), not the current context (step)
                     context.Root.QueueSummaryFile(attachmentName, scrubbedFilePath, stepId);
                 }
-                else
-                {
-                    Trace.Info($"Queueing file ({filePath}) for attachment upload ({attachmentName})");
-                    // Attachments must be added to the parent context (job), not the current context (step)
-                    context.Root.QueueAttachFile(ChecksAttachmentType.StepSummary, attachmentName, scrubbedFilePath);
-                }
             }
             catch (Exception e)
             {

src/Runner.Worker/GlobalContext.cs

@@ -1,9 +1,11 @@
-using System;
+using System;
 using System.Collections.Generic;
+using GitHub.Actions.RunService.WebApi;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Common.Util;
 using GitHub.Runner.Worker.Container;
 using Newtonsoft.Json.Linq;
+using Sdk.RSWebApi.Contracts;
 
 namespace GitHub.Runner.Worker
 {
@@ -16,6 +18,8 @@ namespace GitHub.Runner.Worker
         public IList<String> FileTable { get; set; }
         public IDictionary<String, IDictionary<String, String>> JobDefaults { get; set; }
         public List<ActionsStepTelemetry> StepsTelemetry { get; set; }
+        public List<StepResult> StepsResult { get; set; }
+        public List<Annotation> JobAnnotations { get; set; }
         public List<JobTelemetry> JobTelemetry { get; set; }
         public TaskOrchestrationPlanReference Plan { get; set; }
         public List<string> PrependPath { get; set; }

src/Runner.Worker/Handlers/CompositeActionHandler.cs

@@ -294,7 +294,7 @@ namespace GitHub.Runner.Worker.Handlers
                     // Evaluation error
                     Trace.Info("Caught exception from expression for embedded step.env");
                     step.ExecutionContext.Error(ex);
-                    step.ExecutionContext.Complete(TaskResult.Failed);
+                    SetStepConclusion(step, TaskResult.Failed);
                 }
 
                 // Register Callback

src/Runner.Worker/Handlers/ContainerActionHandler.cs

@@ -38,8 +38,17 @@ namespace GitHub.Runner.Worker.Handlers
             // Update the env dictionary.
             AddInputsToEnvironment();
 
-            var dockerManager = HostContext.GetService<IDockerCommandManager>();
+            IDockerCommandManager dockerManager = null;
-            var containerHookManager = HostContext.GetService<IContainerHookManager>();
+            IContainerHookManager containerHookManager = null;
+            if (FeatureManager.IsContainerHooksEnabled(ExecutionContext.Global.Variables))
+            {
+                containerHookManager = HostContext.GetService<IContainerHookManager>();
+            }
+            else
+            {
+                dockerManager = HostContext.GetService<IDockerCommandManager>();
+            }
+
             string dockerFile = null;
 
             // container image haven't built/pull

src/Runner.Worker/Handlers/OutputManager.cs

@@ -143,7 +143,8 @@ namespace GitHub.Runner.Worker.Handlers
                         if (issue != null)
                         {
                             // Log issue
-                            _executionContext.AddIssue(issue, stripped);
+                            var logOptions = new ExecutionContextLogOptions(true, stripped);
+                            _executionContext.AddIssue(issue, logOptions);
 
                             return;
                         }

src/Runner.Worker/JobExtension.cs

@@ -306,13 +306,13 @@ namespace GitHub.Runner.Worker
                                 }
                             }
 
-                            actionRunner.TryEvaluateDisplayName(contextData, context);
+                            actionRunner.EvaluateDisplayName(contextData, context, out _);
                             jobSteps.Add(actionRunner);
 
                             if (prepareResult.PreStepTracker.TryGetValue(step.Id, out var preStep))
                             {
                                 Trace.Info($"Adding pre-{action.DisplayName}.");
-                                preStep.TryEvaluateDisplayName(contextData, context);
+                                preStep.EvaluateDisplayName(contextData, context, out _);
                                 preStep.DisplayName = $"Pre {preStep.DisplayName}";
                                 preJobSteps.Add(preStep);
                             }
@@ -321,25 +321,28 @@ namespace GitHub.Runner.Worker
 
                     if (message.Variables.TryGetValue("system.workflowFileFullPath", out VariableValue workflowFileFullPath))
                     {
-                        context.Output($"Uses: {workflowFileFullPath.Value}");
+                        var usesLogText = $"Uses: {workflowFileFullPath.Value}";
+                        var reference = GetWorkflowReference(message.Variables);
+                        context.Output(usesLogText + reference);
+
                         if (message.ContextData.TryGetValue("inputs", out var pipelineContextData))
                         {
                             var inputs = pipelineContextData.AssertDictionary("inputs");
-                            if (inputs.Any()) 
+                            if (inputs.Any())
                             {
                                 context.Output($"##[group] Inputs");
-                                foreach (var input in inputs) 
+                                foreach (var input in inputs)
                                 {
                                     context.Output($"  {input.Key}: {input.Value}");
                                 }
                                 context.Output("##[endgroup]");
                             }
                         }
+                    }
 
-                        if (!string.IsNullOrWhiteSpace(message.JobDisplayName)) 
+                    if (!string.IsNullOrWhiteSpace(message.JobDisplayName))
-                        {
+                    {
-                            context.Output($"Complete job name: {message.JobDisplayName}");
+                        context.Output($"Complete job name: {message.JobDisplayName}");
-                        }
                     }
 
                     var intraActionStates = new Dictionary<Guid, Dictionary<string, string>>();
@@ -428,14 +431,6 @@ namespace GitHub.Runner.Worker
                     context.Result = TaskResult.Canceled;
                     throw;
                 }
-                catch (FailedToResolveActionDownloadInfoException ex)
-                {
-                    // Log the error and fail the JobExtension Initialization.
-                    Trace.Error($"Caught exception from JobExtenion Initialization: {ex}");
-                    context.InfrastructureError(ex.Message);
-                    context.Result = TaskResult.Failed;
-                    throw;
-                }
                 catch (Exception ex)
                 {
                     // Log the error and fail the JobExtension Initialization.
@@ -452,6 +447,24 @@ namespace GitHub.Runner.Worker
             }
         }
 
+        private string GetWorkflowReference(IDictionary<string, VariableValue> variables)
+        {
+            var reference = "";
+            if (variables.TryGetValue("system.workflowFileSha", out VariableValue workflowFileSha))
+            {
+                if (variables.TryGetValue("system.workflowFileRef", out VariableValue workflowFileRef)
+                    && !string.IsNullOrEmpty(workflowFileRef.Value))
+                {
+                    reference += $"@{workflowFileRef.Value} ({workflowFileSha.Value})";
+                }
+                else
+                {
+                    reference += $"@{workflowFileSha.Value}";
+                }
+            }
+            return reference;
+        }
+
         public void FinalizeJob(IExecutionContext jobContext, Pipelines.AgentJobRequestMessage message, DateTime jobStartTimeUtc)
         {
             Trace.Entering();
@@ -662,7 +675,7 @@ namespace GitHub.Runner.Worker
                 {
                     var issue = new Issue() { Type = IssueType.Warning, Message = $"You are running out of disk space. The runner will stop working when the machine runs out of disk space. Free space left: {freeSpaceInMB} MB" };
                     issue.Data[Constants.Runner.InternalTelemetryIssueDataKey] = Constants.Runner.LowDiskSpace;
-                    context.AddIssue(issue);
+                    context.AddIssue(issue, ExecutionContextLogOptions.Default);
                     return;
                 }
 

src/Runner.Worker/JobExtensionRunner.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Threading.Tasks;
 using GitHub.DistributedTask.ObjectTemplating.Tokens;
+using GitHub.DistributedTask.Pipelines.ContextData;
 
 namespace GitHub.Runner.Worker
 {
@@ -32,5 +33,18 @@ namespace GitHub.Runner.Worker
         {
             await _runAsync(ExecutionContext, _data);
         }
+
+        public bool TryUpdateDisplayName(out bool updated)
+        {
+            updated = false;
+            return !string.IsNullOrEmpty(this.DisplayName);
+        }
+
+        public bool EvaluateDisplayName(DictionaryContextData contextData, IExecutionContext context, out bool updated)
+        {
+            updated = false;
+            return !string.IsNullOrEmpty(this.DisplayName);
+        }
+
     }
 }

src/Runner.Worker/JobRunner.cs

@@ -3,10 +3,11 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Net.Http;
+using System.Net.Http.Headers;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
-using GitHub.DistributedTask.Pipelines.ContextData;
+using GitHub.DistributedTask.Pipelines;
 using GitHub.DistributedTask.WebApi;
 using GitHub.Runner.Common;
 using GitHub.Runner.Common.Util;
@@ -20,7 +21,7 @@ namespace GitHub.Runner.Worker
     [ServiceLocator(Default = typeof(JobRunner))]
     public interface IJobRunner : IRunnerService
     {
-        Task<TaskResult> RunAsync(Pipelines.AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken);
+        Task<TaskResult> RunAsync(AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken);
     }
 
     public sealed class JobRunner : RunnerService, IJobRunner
@@ -29,7 +30,7 @@ namespace GitHub.Runner.Worker
         private RunnerSettings _runnerSettings;
         private ITempDirectoryManager _tempDirectoryManager;
 
-        public async Task<TaskResult> RunAsync(Pipelines.AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken)
+        public async Task<TaskResult> RunAsync(AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken)
         {
             // Validate parameters.
             Trace.Entering();
@@ -40,21 +41,56 @@ namespace GitHub.Runner.Worker
             Trace.Info("Job ID {0}", message.JobId);
 
             DateTime jobStartTimeUtc = DateTime.UtcNow;
+            IRunnerService server = null;
+
+            // add orchestration id to useragent for better correlation.
+            if (message.Variables.TryGetValue(Constants.Variables.System.OrchestrationId, out VariableValue orchestrationId) &&
+                !string.IsNullOrEmpty(orchestrationId.Value))
+            {
+                HostContext.UserAgents.Add(new ProductInfoHeaderValue("OrchestrationId", orchestrationId.Value));
+            }
 
             ServiceEndpoint systemConnection = message.Resources.Endpoints.Single(x => string.Equals(x.Name, WellKnownServiceEndpointNames.SystemVssConnection, StringComparison.OrdinalIgnoreCase));
+            if (MessageUtil.IsRunServiceJob(message.MessageType))
+            {
+                var runServer = HostContext.GetService<IRunServer>();
+                VssCredentials jobServerCredential = VssUtil.GetVssCredential(systemConnection);
+                await runServer.ConnectAsync(systemConnection.Url, jobServerCredential);
+                server = runServer;
 
-            // Setup the job server and job server queue.
+                message.Variables.TryGetValue("system.github.launch_endpoint", out VariableValue launchEndpointVariable);
-            var jobServer = HostContext.GetService<IJobServer>();
+                var launchReceiverEndpoint = launchEndpointVariable?.Value;
-            VssCredentials jobServerCredential = VssUtil.GetVssCredential(systemConnection);
+
-            Uri jobServerUrl = systemConnection.Url;
+                if (systemConnection?.Authorization != null &&
+                    systemConnection.Authorization.Parameters.TryGetValue("AccessToken", out var accessToken) &&
+                    !string.IsNullOrEmpty(accessToken) &&
+                    !string.IsNullOrEmpty(launchReceiverEndpoint))
+                {
+                    Trace.Info("Initializing launch client");
+                    var launchServer = HostContext.GetService<ILaunchServer>();
+                    launchServer.InitializeLaunchClient(new Uri(launchReceiverEndpoint), accessToken);
+                }
+                _jobServerQueue = HostContext.GetService<IJobServerQueue>();
+                _jobServerQueue.Start(message, resultServiceOnly: true);
+            }
+            else
+            {
+                // Setup the job server and job server queue.
+                var jobServer = HostContext.GetService<IJobServer>();
+                VssCredentials jobServerCredential = VssUtil.GetVssCredential(systemConnection);
+                Uri jobServerUrl = systemConnection.Url;
+
+                Trace.Info($"Creating job server with URL: {jobServerUrl}");
+                // jobServerQueue is the throttling reporter.
+                _jobServerQueue = HostContext.GetService<IJobServerQueue>();
+                VssConnection jobConnection = VssUtil.CreateConnection(jobServerUrl, jobServerCredential, new DelegatingHandler[] { new ThrottlingReportHandler(_jobServerQueue) });
+                await jobServer.ConnectAsync(jobConnection);
+
+                _jobServerQueue.Start(message);
+                server = jobServer;
+            }
 
-            Trace.Info($"Creating job server with URL: {jobServerUrl}");
-            // jobServerQueue is the throttling reporter.
-            _jobServerQueue = HostContext.GetService<IJobServerQueue>();
-            VssConnection jobConnection = VssUtil.CreateConnection(jobServerUrl, jobServerCredential, new DelegatingHandler[] { new ThrottlingReportHandler(_jobServerQueue) });
-            await jobServer.ConnectAsync(jobConnection);
 
-            _jobServerQueue.Start(message);
             HostContext.WritePerfCounter($"WorkerJobServerQueueStarted_{message.RequestId.ToString()}");
 
             IExecutionContext jobContext = null;
@@ -84,7 +120,8 @@ namespace GitHub.Runner.Worker
                         default:
                             throw new ArgumentException(HostContext.RunnerShutdownReason.ToString(), nameof(HostContext.RunnerShutdownReason));
                     }
-                    jobContext.AddIssue(new Issue() { Type = IssueType.Error, Message = errorMessage });
+                    var issue = new Issue() { Type = IssueType.Error, Message = errorMessage };
+                    jobContext.AddIssue(issue, ExecutionContextLogOptions.Default);
                 });
 
                 // Validate directory permissions.
@@ -99,7 +136,7 @@ namespace GitHub.Runner.Worker
                 {
                     Trace.Error(ex);
                     jobContext.Error(ex);
-                    return await CompleteJobAsync(jobServer, jobContext, message, TaskResult.Failed);
+                    return await CompleteJobAsync(server, jobContext, message, TaskResult.Failed);
                 }
 
                 if (jobContext.Global.WriteDebug)
@@ -113,6 +150,11 @@ namespace GitHub.Runner.Worker
                 _runnerSettings = HostContext.GetService<IConfigurationStore>().GetSettings();
                 jobContext.SetRunnerContext("name", _runnerSettings.AgentName);
 
+                if (jobContext.Global.Variables.TryGetValue(WellKnownDistributedTaskVariables.RunnerEnvironment, out var runnerEnvironment))
+                {
+                    jobContext.SetRunnerContext("environment", runnerEnvironment);
+                }
+
                 string toolsDirectory = HostContext.GetDirectory(WellKnownDirectory.Tools);
                 Directory.CreateDirectory(toolsDirectory);
                 jobContext.SetRunnerContext("tool_cache", toolsDirectory);
@@ -136,7 +178,7 @@ namespace GitHub.Runner.Worker
                     // don't log error issue to job ExecutionContext, since server owns the job level issue
                     Trace.Error($"Job is cancelled during initialize.");
                     Trace.Error($"Caught exception: {ex}");
-                    return await CompleteJobAsync(jobServer, jobContext, message, TaskResult.Canceled);
+                    return await CompleteJobAsync(server, jobContext, message, TaskResult.Canceled);
                 }
                 catch (Exception ex)
                 {
@@ -144,7 +186,7 @@ namespace GitHub.Runner.Worker
                     // don't log error issue to job ExecutionContext, since server owns the job level issue
                     Trace.Error($"Job initialize failed.");
                     Trace.Error($"Caught exception from {nameof(jobExtension.InitializeJob)}: {ex}");
-                    return await CompleteJobAsync(jobServer, jobContext, message, TaskResult.Failed);
+                    return await CompleteJobAsync(server, jobContext, message, TaskResult.Failed);
                 }
 
                 // trace out all steps
@@ -181,7 +223,7 @@ namespace GitHub.Runner.Worker
                     // Log the error and fail the job.
                     Trace.Error($"Caught exception from job steps {nameof(StepsRunner)}: {ex}");
                     jobContext.Error(ex);
-                    return await CompleteJobAsync(jobServer, jobContext, message, TaskResult.Failed);
+                    return await CompleteJobAsync(server, jobContext, message, TaskResult.Failed);
                 }
                 finally
                 {
@@ -192,7 +234,7 @@ namespace GitHub.Runner.Worker
                 Trace.Info($"Job result after all job steps finish: {jobContext.Result ?? TaskResult.Succeeded}");
 
                 Trace.Info("Completing the job execution context.");
-                return await CompleteJobAsync(jobServer, jobContext, message);
+                return await CompleteJobAsync(server, jobContext, message);
             }
             finally
             {
@@ -206,6 +248,66 @@ namespace GitHub.Runner.Worker
             }
         }
 
+        private async Task<TaskResult> CompleteJobAsync(IRunnerService server, IExecutionContext jobContext, Pipelines.AgentJobRequestMessage message, TaskResult? taskResult = null)
+        {
+            if (server is IRunServer runServer)
+            {
+                return await CompleteJobAsync(runServer, jobContext, message, taskResult);
+            }
+            else if (server is IJobServer jobServer)
+            {
+                return await CompleteJobAsync(jobServer, jobContext, message, taskResult);
+            }
+            else
+            {
+                throw new NotSupportedException();
+            }
+        }
+
+        private async Task<TaskResult> CompleteJobAsync(IRunServer runServer, IExecutionContext jobContext, Pipelines.AgentJobRequestMessage message, TaskResult? taskResult = null)
+        {
+            jobContext.Debug($"Finishing: {message.JobDisplayName}");
+            TaskResult result = jobContext.Complete(taskResult);
+            if (jobContext.Global.Variables.TryGetValue("Node12ActionsWarnings", out var node12Warnings))
+            {
+                var actions = string.Join(", ", StringUtil.ConvertFromJson<HashSet<string>>(node12Warnings));
+                jobContext.Warning(string.Format(Constants.Runner.Node12DetectedAfterEndOfLife, actions));
+            }
+
+            // Make sure to clean temp after file upload since they may be pending fileupload still use the TEMP dir.
+            _tempDirectoryManager?.CleanupTempDirectory();
+
+            // Load any upgrade telemetry
+            LoadFromTelemetryFile(jobContext.Global.JobTelemetry);
+
+            // Make sure we don't submit secrets as telemetry
+            MaskTelemetrySecrets(jobContext.Global.JobTelemetry);
+
+            Trace.Info($"Raising job completed against run service");
+            var completeJobRetryLimit = 5;
+            var exceptions = new List<Exception>();
+            while (completeJobRetryLimit-- > 0)
+            {
+                try
+                {
+                    await runServer.CompleteJobAsync(message.Plan.PlanId, message.JobId, result, jobContext.JobOutputs, jobContext.Global.StepsResult, jobContext.Global.JobAnnotations, default);
+                    return result;
+                }
+                catch (Exception ex)
+                {
+                    Trace.Error($"Catch exception while attempting to complete job {message.JobId}, job request {message.RequestId}.");
+                    Trace.Error(ex);
+                    exceptions.Add(ex);
+                }
+
+                // delay 5 seconds before next retry.
+                await Task.Delay(TimeSpan.FromSeconds(5));
+            }
+
+            // rethrow exceptions from all attempts.
+            throw new AggregateException(exceptions);
+        }
+
         private async Task<TaskResult> CompleteJobAsync(IJobServer jobServer, IExecutionContext jobContext, Pipelines.AgentJobRequestMessage message, TaskResult? taskResult = null)
         {
             jobContext.Debug($"Finishing: {message.JobDisplayName}");

src/Runner.Worker/StepsRunner.cs

@@ -1,12 +1,9 @@
 using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using GitHub.DistributedTask.Expressions2;
 using GitHub.DistributedTask.ObjectTemplating.Tokens;
-using GitHub.DistributedTask.Pipelines;
 using GitHub.DistributedTask.Pipelines.ContextData;
 using GitHub.DistributedTask.Pipelines.ObjectTemplating;
 using GitHub.DistributedTask.WebApi;
@@ -14,8 +11,6 @@ using GitHub.Runner.Common;
 using GitHub.Runner.Common.Util;
 using GitHub.Runner.Sdk;
 using GitHub.Runner.Worker.Expressions;
-using ObjectTemplating = GitHub.DistributedTask.ObjectTemplating;
-using Pipelines = GitHub.DistributedTask.Pipelines;
 
 namespace GitHub.Runner.Worker
 {
@@ -26,6 +21,8 @@ namespace GitHub.Runner.Worker
         string DisplayName { get; set; }
         IExecutionContext ExecutionContext { get; set; }
         TemplateToken Timeout { get; }
+        bool TryUpdateDisplayName(out bool updated);
+        bool EvaluateDisplayName(DictionaryContextData contextData, IExecutionContext context, out bool updated);
         Task RunAsync();
     }
 
@@ -195,6 +192,12 @@ namespace GitHub.Runner.Worker
                         }
                         else
                         {
+                            // This is our last, best chance to expand the display name.  (At this point, all the requirements for successful expansion should be met.)
+                            // That being said, evaluating the display name should still be considered as a "best effort" exercise.  (It's not critical or paramount.)
+                            // For that reason, we call a safe "Try..." wrapper method to ensure that any potential problems we encounter in evaluating the display name
+                            // don't interfere with our ultimate goal within this code block:  evaluation of the condition.
+                            step.TryUpdateDisplayName(out _);
+
                             try
                             {
                                 var templateEvaluator = step.ExecutionContext.ToPipelineTemplateEvaluator(conditionTraceWriter);
@@ -256,14 +259,6 @@ namespace GitHub.Runner.Worker
 
         private async Task RunStepAsync(IStep step, CancellationToken jobCancellationToken)
         {
-            // Check to see if we can expand the display name
-            if (step is IActionRunner actionRunner &&
-                actionRunner.Stage == ActionRunStage.Main &&
-                actionRunner.TryEvaluateDisplayName(step.ExecutionContext.ExpressionValues, step.ExecutionContext))
-            {
-                step.ExecutionContext.UpdateTimelineRecordDisplayName(actionRunner.DisplayName);
-            }
-
             // Start the step
             Trace.Info("Starting the step.");
             step.ExecutionContext.Debug($"Starting: {step.DisplayName}");

src/Sdk/Common/Common/Authentication/VssCredentialsExtension.cs

@@ -1,20 +0,0 @@
-using GitHub.Services.OAuth;
-
-namespace GitHub.Services.Common
-{
-    public static class VssCredentialsExtension
-    {
-        public static VssOAuthCredential ToOAuthCredentials(
-            this VssCredentials credentials)
-        {
-            if (credentials.Federated.CredentialType == VssCredentialsType.OAuth)
-            {
-                return credentials.Federated as VssOAuthCredential;
-            }
-            else
-            {
-                return null;
-            }
-        }
-    }
-}

src/Sdk/Common/Common/RawClientHttpRequestSettings.cs

@@ -184,9 +184,33 @@ namespace GitHub.Services.Common
             return settings;
         }
 
+        /// <summary>
+        /// Gets or sets the maximum size allowed for response content buffering.
+        /// </summary>
+        [DefaultValue(c_defaultContentBufferSize)]
+        public Int32 MaxContentBufferSize
+        {
+            get
+            {
+                return m_maxContentBufferSize;
+            }
+            set
+            {
+                ArgumentUtility.CheckForOutOfRange(value, nameof(value), 0, c_maxAllowedContentBufferSize);
+                m_maxContentBufferSize = value;
+            }
+        }
+
         private static Lazy<RawClientHttpRequestSettings> s_defaultSettings
             = new Lazy<RawClientHttpRequestSettings>(ConstructDefaultSettings);
 
+        private Int32 m_maxContentBufferSize;
+        // We will buffer a maximum of 1024MB in the message handler
+        private const Int32 c_maxAllowedContentBufferSize = 1024 * 1024 * 1024;
+
+        // We will buffer, by default, up to 512MB in the message handler
+        private const Int32 c_defaultContentBufferSize = 1024 * 1024 * 512;
+
         private const Int32 c_defaultMaxRetry = 3;
         private static readonly TimeSpan s_defaultTimeout = TimeSpan.FromSeconds(100); //default WebAPI timeout
         private ICollection<CultureInfo> m_acceptLanguages = new List<CultureInfo>();

src/Sdk/Common/Common/RawHttpMessageHandler.cs

@@ -9,23 +9,23 @@ using GitHub.Services.OAuth;
 
 namespace GitHub.Services.Common
 {
-    public class RawHttpMessageHandler: HttpMessageHandler
+    public class RawHttpMessageHandler : HttpMessageHandler
     {
         public RawHttpMessageHandler(
-            VssOAuthCredential credentials)
+            FederatedCredential credentials)
             : this(credentials, new RawClientHttpRequestSettings())
         {
         }
 
         public RawHttpMessageHandler(
-            VssOAuthCredential credentials,
+            FederatedCredential credentials,
             RawClientHttpRequestSettings settings)
             : this(credentials, settings, new HttpClientHandler())
         {
         }
 
         public RawHttpMessageHandler(
-            VssOAuthCredential credentials,
+            FederatedCredential credentials,
             RawClientHttpRequestSettings settings,
             HttpMessageHandler innerHandler)
         {
@@ -56,7 +56,7 @@ namespace GitHub.Services.Common
         /// <summary>
         /// Gets the credentials associated with this handler.
         /// </summary>
-        public VssOAuthCredential Credentials
+        public FederatedCredential Credentials
         {
             get;
             private set;
@@ -111,7 +111,7 @@ namespace GitHub.Services.Common
                 // Ensure that we attempt to use the most appropriate authentication mechanism by default.
                 if (m_tokenProvider == null)
                 {
-                    m_tokenProvider = this.Credentials.GetTokenProvider(request.RequestUri);
+                    m_tokenProvider = this.Credentials.CreateTokenProvider(request.RequestUri, null, null);
                 }
             }
 
@@ -120,6 +120,7 @@ namespace GitHub.Services.Common
             Boolean succeeded = false;
             HttpResponseMessageWrapper responseWrapper;
 
+            Boolean lastResponseDemandedProxyAuth = false;
             Int32 retries = m_maxAuthRetries;
             try
             {
@@ -138,7 +139,13 @@ namespace GitHub.Services.Common
 
                     // Let's start with sending a token
                     IssuedToken token = await m_tokenProvider.GetTokenAsync(null, tokenSource.Token).ConfigureAwait(false);
-                    ApplyToken(request, token);
+                    ApplyToken(request, token, applyICredentialsToWebProxy: lastResponseDemandedProxyAuth);
+
+                    // The WinHttpHandler will chunk any content that does not have a computed length which is
+                    // not what we want. By loading into a buffer up-front we bypass this behavior and there is
+                    // no difference in the normal HttpClientHandler behavior here since this is what they were
+                    // already doing.
+                    await BufferRequestContentAsync(request, tokenSource.Token).ConfigureAwait(false);
 
                     // ConfigureAwait(false) enables the continuation to be run outside any captured
                     // SyncronizationContext (such as ASP.NET's) which keeps things from deadlocking...
@@ -147,7 +154,8 @@ namespace GitHub.Services.Common
                     responseWrapper = new HttpResponseMessageWrapper(response);
 
                     var isUnAuthorized = responseWrapper.StatusCode == HttpStatusCode.Unauthorized;
-                    if (!isUnAuthorized)
+                    lastResponseDemandedProxyAuth = responseWrapper.StatusCode == HttpStatusCode.ProxyAuthenticationRequired;
+                    if (!isUnAuthorized && !lastResponseDemandedProxyAuth)
                     {
                         // Validate the token after it has been successfully authenticated with the server.
                         m_tokenProvider?.ValidateToken(token, responseWrapper);
@@ -211,15 +219,42 @@ namespace GitHub.Services.Common
             }
         }
 
+        private static async Task BufferRequestContentAsync(
+             HttpRequestMessage request,
+             CancellationToken cancellationToken)
+        {
+            if (request.Content != null &&
+                request.Headers.TransferEncodingChunked != true)
+            {
+                Int64? contentLength = request.Content.Headers.ContentLength;
+                if (contentLength == null)
+                {
+                    await request.Content.LoadIntoBufferAsync().EnforceCancellation(cancellationToken).ConfigureAwait(false);
+                }
+
+                // Explicitly turn off chunked encoding since we have computed the request content size
+                request.Headers.TransferEncodingChunked = false;
+            }
+        }
+
         private void ApplyToken(
             HttpRequestMessage request,
-            IssuedToken token)
+            IssuedToken token,
+            bool applyICredentialsToWebProxy = false)
         {
             switch (token)
             {
                 case null:
                     return;
                 case ICredentials credentialsToken:
+                    if (applyICredentialsToWebProxy)
+                    {
+                        HttpClientHandler httpClientHandler = m_transportHandler as HttpClientHandler;
+                        if (httpClientHandler != null && httpClientHandler.Proxy != null)
+                        {
+                            httpClientHandler.Proxy.Credentials = credentialsToken;
+                        }
+                    }
                     m_credentialWrapper.InnerCredentials = credentialsToken;
                     break;
                 default:
@@ -254,7 +289,7 @@ namespace GitHub.Services.Common
         private CredentialWrapper m_credentialWrapper;
         private object m_thisLock;
         private const Int32 m_maxAuthRetries = 3;
-        private VssOAuthTokenProvider m_tokenProvider;
+        private IssuedTokenProvider m_tokenProvider;
 
         //.Net Core does not attempt NTLM schema on Linux, unless ICredentials is a CredentialCache instance
         //This workaround may not be needed after this corefx fix is consumed: https://github.com/dotnet/corefx/pull/7923

src/Sdk/Common/Common/VssHttpMessageHandler.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net;

src/Sdk/Common/Common/VssHttpRequestSettings.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Globalization;

src/Sdk/DTPipelines/Pipelines/AgentJobRequestMessage.cs

@@ -42,9 +42,10 @@ namespace GitHub.DistributedTask.Pipelines
             IList<String> fileTable,
             TemplateToken jobOutputs,
             IList<TemplateToken> defaults,
-            ActionsEnvironmentReference actionsEnvironment)
+            ActionsEnvironmentReference actionsEnvironment,
+            String messageType = JobRequestMessageTypes.PipelineAgentJobRequest)
         {
-            this.MessageType = JobRequestMessageTypes.PipelineAgentJobRequest;
+            this.MessageType = messageType;
             this.Plan = plan;
             this.JobId = jobId;
             this.JobDisplayName = jobDisplayName;

src/Sdk/DTPipelines/Pipelines/ObjectTemplating/PipelineTemplateEvaluator.cs

@@ -455,7 +455,6 @@ namespace GitHub.DistributedTask.Pipelines.ObjectTemplating
         private readonly String[] s_expressionValueNames = new[]
         {
             PipelineTemplateConstants.GitHub,
-            PipelineTemplateConstants.Needs,
             PipelineTemplateConstants.Strategy,
             PipelineTemplateConstants.Matrix,
             PipelineTemplateConstants.Needs,

src/Sdk/DTPipelines/workflow-v1.0.json

@@ -222,6 +222,9 @@
     },
 
     "job-outputs": {
+      "context": [
+        "matrix"
+      ],
       "mapping": {
         "loose-key-type": "non-empty-string",
         "loose-value-type": "string-runner-context"

src/Sdk/DTWebApi/WebApi/Exceptions.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Runtime.Serialization;
 using GitHub.Services.Common;
 
@@ -1519,6 +1519,26 @@ namespace GitHub.DistributedTask.WebApi
         }
     }
 
+    [Serializable]
+    [ExceptionMapping("0.0", "3.0", "TaskOrchestrationJobAlreadyAcquiredException", "GitHub.DistributedTask.WebApi.TaskOrchestrationJobAlreadyAcquiredException, GitHub.DistributedTask.WebApi, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
+    public sealed class TaskOrchestrationJobAlreadyAcquiredException : DistributedTaskException
+    {
+        public TaskOrchestrationJobAlreadyAcquiredException(String message)
+            : base(message)
+        {
+        }
+
+        public TaskOrchestrationJobAlreadyAcquiredException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        private TaskOrchestrationJobAlreadyAcquiredException(SerializationInfo info, StreamingContext context)
+            : base(info, context)
+        {
+        }
+    }
+
     [Serializable]
     [ExceptionMapping("0.0", "3.0", "TaskOrchestrationPlanSecurityException", "GitHub.DistributedTask.WebApi.TaskOrchestrationPlanSecurityException, GitHub.DistributedTask.WebApi, Version=14.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a")]
     public sealed class TaskOrchestrationPlanSecurityException : DistributedTaskException

src/Sdk/DTWebApi/WebApi/ListRunnersResponse.cs

@@ -0,0 +1,48 @@
+using GitHub.Services.WebApi;
+using System;
+using System.Collections.Generic;
+using System.Runtime.Serialization;
+using Newtonsoft.Json;
+using System.Linq;
+
+namespace GitHub.DistributedTask.WebApi
+{
+
+    public class ListRunnersResponse
+    {
+        public ListRunnersResponse()
+        {
+        }
+
+        public ListRunnersResponse(ListRunnersResponse responseToBeCloned)
+        {
+            this.TotalCount = responseToBeCloned.TotalCount;
+            this.Runners = responseToBeCloned.Runners;
+        }
+
+        [JsonProperty("total_count")]
+        public int TotalCount
+        {
+            get;
+            set;
+        }
+
+        [JsonProperty("runners")]
+        public List<Runner> Runners
+        {
+            get;
+            set;
+        }
+
+        public ListRunnersResponse Clone()
+        {
+            return new ListRunnersResponse(this);
+        }
+
+        public List<TaskAgent> ToTaskAgents()
+        {
+            return Runners.Select(runner => new TaskAgent() { Name = runner.Name }).ToList();
+        }
+    }
+
+}

src/Sdk/DTWebApi/WebApi/RunServiceHttpClient.cs

@@ -1,75 +0,0 @@
-using System;
-using System.Net.Http;
-using System.Threading;
-using System.Threading.Tasks;
-using GitHub.Services.Common;
-using GitHub.Services.OAuth;
-using GitHub.Services.WebApi;
-using Sdk.WebApi.WebApi;
-
-namespace GitHub.DistributedTask.WebApi
-{
-    [ResourceArea(TaskResourceIds.AreaId)]
-    public class RunServiceHttpClient : RawHttpClientBase
-    {
-        public RunServiceHttpClient(
-            Uri baseUrl,
-            VssOAuthCredential credentials)
-            : base(baseUrl, credentials)
-        {
-        }
-
-        public RunServiceHttpClient(
-            Uri baseUrl,
-            VssOAuthCredential credentials,
-            RawClientHttpRequestSettings settings)
-            : base(baseUrl, credentials, settings)
-        {
-        }
-
-        public RunServiceHttpClient(
-            Uri baseUrl,
-            VssOAuthCredential credentials,
-            params DelegatingHandler[] handlers)
-            : base(baseUrl, credentials, handlers)
-        {
-        }
-
-        public RunServiceHttpClient(
-            Uri baseUrl,
-            VssOAuthCredential credentials,
-            RawClientHttpRequestSettings settings,
-            params DelegatingHandler[] handlers)
-            : base(baseUrl, credentials, settings, handlers)
-        {
-        }
-
-        public RunServiceHttpClient(
-            Uri baseUrl,
-            HttpMessageHandler pipeline,
-            Boolean disposeHandler)
-            : base(baseUrl, pipeline, disposeHandler)
-        {
-        }
-
-        public Task<Pipelines.AgentJobRequestMessage> GetJobMessageAsync(
-            Uri requestUri,
-            string messageId,
-            CancellationToken cancellationToken = default)
-        {
-            HttpMethod httpMethod = new HttpMethod("POST");
-            var payload = new {
-                StreamID = messageId
-            };
-
-            var payloadJson = JsonUtility.ToString(payload);
-            var requestContent = new StringContent(payloadJson, System.Text.Encoding.UTF8, "application/json");
-            return SendAsync<Pipelines.AgentJobRequestMessage>(
-                httpMethod,
-                additionalHeaders: null,
-                requestUri: requestUri,
-                content: requestContent,
-                cancellationToken: cancellationToken);
-        }
-    }
-}

src/Sdk/DTWebApi/WebApi/Runner.cs

@@ -0,0 +1,63 @@
+using System;
+using Newtonsoft.Json;
+
+namespace GitHub.DistributedTask.WebApi
+{
+    public class Runner
+    {
+
+        public class Authorization
+        {
+            /// <summary>
+            /// The url to refresh tokens
+            /// </summary> 
+            [JsonProperty("authorization_url")]
+            public Uri AuthorizationUrl
+            {
+                get;
+                internal set;
+            }
+
+            /// <summary>
+            /// The url to connect to to poll for messages
+            /// </summary> 
+            [JsonProperty("server_url")]
+            public string ServerUrl
+            {
+                get;
+                internal set;
+            }
+
+            /// <summary>
+            /// The client id to use when connecting to the authorization_url
+            /// </summary>
+            [JsonProperty("client_id")]
+            public string ClientId
+            {
+                get;
+                internal set;
+            }
+        }
+
+        [JsonProperty("name")]
+        public string Name
+        {
+            get;
+            internal set;
+        }
+
+        [JsonProperty("id")]
+        public Int32 Id
+        {
+            get;
+            internal set;
+        }
+
+        [JsonProperty("authorization")]
+        public Authorization RunnerAuthorization
+        {
+            get;
+            internal set;
+        }
+    }
+}

src/Sdk/DTWebApi/WebApi/RunnerGroup.cs

@@ -0,0 +1,98 @@
+using GitHub.Services.WebApi;
+using System;
+using System.Runtime.Serialization;
+using System.ComponentModel;
+using System.Collections.Generic;
+using Newtonsoft.Json;
+using System.Linq;
+
+namespace GitHub.DistributedTask.WebApi
+{
+    /// <summary>
+    /// An organization-level grouping of runners.
+    /// </summary>
+    [DataContract]
+    public class RunnerGroup
+    {
+        internal RunnerGroup()
+        {
+        }
+
+        public RunnerGroup(String name)
+        {
+            this.Name = name;
+        }
+
+        private RunnerGroup(RunnerGroup poolToBeCloned)
+        {
+            this.Id = poolToBeCloned.Id;
+            this.IsHosted = poolToBeCloned.IsHosted;
+            this.Name = poolToBeCloned.Name;
+            this.IsDefault = poolToBeCloned.IsDefault;
+        }
+
+        [DataMember(EmitDefaultValue = false)]
+        [JsonProperty("id")]
+        public Int32 Id
+        {
+            get;
+            set;
+        }
+
+        [DataMember(EmitDefaultValue = false)]
+        [JsonProperty("name")]
+        public String Name
+        {
+            get;
+            set;
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether or not this pool is internal and can't be modified by users
+        /// </summary>
+        [DataMember]
+        [JsonProperty("default")]
+        public bool IsDefault
+        {
+            get;
+            set;
+        }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether or not this pool is managed by the service.
+        /// </summary>
+        [DataMember]
+        [JsonProperty("is_hosted")]
+        public Boolean IsHosted
+        {
+            get;
+            set;
+        }
+    }
+
+    public class RunnerGroupList
+    {
+        public RunnerGroupList()
+        {
+            this.RunnerGroups = new List<RunnerGroup>();
+        }
+
+        public List<TaskAgentPool> ToAgentPoolList()
+        {
+            var agentPools = this.RunnerGroups.Select(x => new TaskAgentPool(x.Name)
+            {
+                Id = x.Id,
+                IsHosted = x.IsHosted,
+                IsInternal = x.IsDefault
+            }).ToList();
+
+            return agentPools;
+        }
+
+        [JsonProperty("runner_groups")]
+        public List<RunnerGroup> RunnerGroups { get; set; }
+
+        [JsonProperty("total_count")]
+        public int Count { get; set; }
+    }
+}

src/Sdk/DTWebApi/WebApi/TaskAttachment.cs

@@ -1,4 +1,4 @@
-using GitHub.Services.Common;
+using GitHub.Services.Common;
 using GitHub.Services.WebApi;
 using System;
 using System.Runtime.Serialization;
@@ -100,6 +100,7 @@ namespace GitHub.DistributedTask.WebApi
         public static readonly String Summary = "DistributedTask.Core.Summary";
         public static readonly String FileAttachment = "DistributedTask.Core.FileAttachment";
         public static readonly String DiagnosticLog = "DistributedTask.Core.DiagnosticLog";
+        public static readonly String ResultsLog = "Results.Core.Log";
     }
 
     [GenerateAllConstants]

src/Sdk/DTWebApi/WebApi/TimelineRecord.cs

@@ -1,8 +1,7 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Runtime.Serialization;
-using GitHub.Services.Common;
 
 namespace GitHub.DistributedTask.WebApi
 {
@@ -10,69 +9,78 @@ namespace GitHub.DistributedTask.WebApi
     public sealed class TimelineRecord
     {
         public TimelineRecord()
+            : this(null)
         {
-            this.Attempt = 1;
         }
 
         private TimelineRecord(TimelineRecord recordToBeCloned)
         {
-            this.Attempt = recordToBeCloned.Attempt;
+            this.EnsureInitialized();
-            this.ChangeId = recordToBeCloned.ChangeId;
-            this.CurrentOperation = recordToBeCloned.CurrentOperation;
-            this.FinishTime = recordToBeCloned.FinishTime;
-            this.Id = recordToBeCloned.Id;
-            this.Identifier = recordToBeCloned.Identifier;
-            this.LastModified = recordToBeCloned.LastModified;
-            this.Location = recordToBeCloned.Location;
-            this.Name = recordToBeCloned.Name;
-            this.Order = recordToBeCloned.Order;
-            this.ParentId = recordToBeCloned.ParentId;
-            this.PercentComplete = recordToBeCloned.PercentComplete;
-            this.RecordType = recordToBeCloned.RecordType;
-            this.Result = recordToBeCloned.Result;
-            this.ResultCode = recordToBeCloned.ResultCode;
-            this.StartTime = recordToBeCloned.StartTime;
-            this.State = recordToBeCloned.State;
-            this.TimelineId = recordToBeCloned.TimelineId;
-            this.WorkerName = recordToBeCloned.WorkerName;
-            this.RefName = recordToBeCloned.RefName;
-            this.ErrorCount = recordToBeCloned.ErrorCount;
-            this.WarningCount = recordToBeCloned.WarningCount;
-            this.NoticeCount = recordToBeCloned.NoticeCount;
-            this.AgentPlatform = recordToBeCloned.AgentPlatform;
 
-            if (recordToBeCloned.Log != null)
+            if (recordToBeCloned != null)
             {
-                this.Log = new TaskLogReference
+                this.Attempt = recordToBeCloned.Attempt;
+                this.ChangeId = recordToBeCloned.ChangeId;
+                this.CurrentOperation = recordToBeCloned.CurrentOperation;
+                this.FinishTime = recordToBeCloned.FinishTime;
+                this.Id = recordToBeCloned.Id;
+                this.Identifier = recordToBeCloned.Identifier;
+                this.LastModified = recordToBeCloned.LastModified;
+                this.Location = recordToBeCloned.Location;
+                this.Name = recordToBeCloned.Name;
+                this.Order = recordToBeCloned.Order;
+                this.ParentId = recordToBeCloned.ParentId;
+                this.PercentComplete = recordToBeCloned.PercentComplete;
+                this.RecordType = recordToBeCloned.RecordType;
+                this.Result = recordToBeCloned.Result;
+                this.ResultCode = recordToBeCloned.ResultCode;
+                this.StartTime = recordToBeCloned.StartTime;
+                this.State = recordToBeCloned.State;
+                this.TimelineId = recordToBeCloned.TimelineId;
+                this.WorkerName = recordToBeCloned.WorkerName;
+                this.RefName = recordToBeCloned.RefName;
+                this.ErrorCount = recordToBeCloned.ErrorCount;
+                this.WarningCount = recordToBeCloned.WarningCount;
+                this.NoticeCount = recordToBeCloned.NoticeCount;
+                this.AgentPlatform = recordToBeCloned.AgentPlatform;
+
+                if (recordToBeCloned.Log != null)
                 {
-                    Id = recordToBeCloned.Log.Id,
+                    this.Log = new TaskLogReference
-                    Location = recordToBeCloned.Log.Location,
+                    {
-                };
+                        Id = recordToBeCloned.Log.Id,
-            }
+                        Location = recordToBeCloned.Log.Location,
+                    };
+                }
 
-            if (recordToBeCloned.Details != null)
+                if (recordToBeCloned.Details != null)
-            {
-                this.Details = new TimelineReference
                 {
-                    ChangeId = recordToBeCloned.Details.ChangeId,
+                    this.Details = new TimelineReference
-                    Id = recordToBeCloned.Details.Id,
+                    {
-                    Location = recordToBeCloned.Details.Location,
+                        ChangeId = recordToBeCloned.Details.ChangeId,
-                };
+                        Id = recordToBeCloned.Details.Id,
-            }
+                        Location = recordToBeCloned.Details.Location,
+                    };
+                }
 
-            if (recordToBeCloned.m_issues?.Count> 0)
+                if (recordToBeCloned.m_issues?.Count > 0)
-            {
+                {
-                this.Issues.AddRange(recordToBeCloned.Issues.Select(i => i.Clone()));
+                    this.Issues.AddRange(recordToBeCloned.Issues.Select(i => i.Clone()));
-            }
+                }
 
-            if (recordToBeCloned.m_previousAttempts?.Count > 0)
+                if (recordToBeCloned.m_previousAttempts?.Count > 0)
-            {
+                {
-                this.PreviousAttempts.AddRange(recordToBeCloned.PreviousAttempts);
+                    this.m_previousAttempts.AddRange(recordToBeCloned.m_previousAttempts);
-            }
+                }
 
-            if (recordToBeCloned.m_variables?.Count > 0)
+                if (recordToBeCloned.m_variables?.Count > 0)
-            {
+                {
-                this.m_variables = recordToBeCloned.Variables.ToDictionary(k => k.Key, v => v.Value.Clone());
+                    // Don't pave over the case-insensitive Dictionary we initialized above.
+                    foreach (var kvp in recordToBeCloned.m_variables)
+                    {
+                        m_variables[kvp.Key] = kvp.Value.Clone();
+                    }
+                }
             }
         }
 
@@ -98,14 +106,14 @@ namespace GitHub.DistributedTask.WebApi
         }
 
         [DataMember(Name = "Type", Order = 3)]
-        public String RecordType
+        public string RecordType
         {
             get;
             set;
         }
 
         [DataMember(Order = 4)]
-        public String Name
+        public string Name
         {
             get;
             set;
@@ -126,7 +134,7 @@ namespace GitHub.DistributedTask.WebApi
         }
 
         [DataMember(Order = 7)]
-        public String CurrentOperation
+        public string CurrentOperation
         {
             get;
             set;
@@ -154,7 +162,7 @@ namespace GitHub.DistributedTask.WebApi
         }
 
         [DataMember(Order = 11)]
-        public String ResultCode
+        public string ResultCode
         {
             get;
             set;
@@ -175,7 +183,7 @@ namespace GitHub.DistributedTask.WebApi
         }
 
         [DataMember(Order = 14)]
-        public String WorkerName
+        public string WorkerName
         {
             get;
             set;
@@ -189,7 +197,7 @@ namespace GitHub.DistributedTask.WebApi
         }
 
         [DataMember(Order = 16, EmitDefaultValue = false)]
-        public String RefName
+        public string RefName
         {
             get;
             set;
@@ -209,35 +217,46 @@ namespace GitHub.DistributedTask.WebApi
             set;
         }
 
-        [DataMember(Order = 40)]
+        public Int32 ErrorCount
-        public Int32? ErrorCount
         {
-            get;
+            get
-            set;
+            {
+                return m_errorCount.GetValueOrDefault(0);
+            }
+            set
+            {
+                m_errorCount = value;
+            }
         }
 
-        [DataMember(Order = 50)]
+        public Int32 WarningCount
-        public Int32? WarningCount
         {
-            get;
+            get
-            set;
+            {
+                return m_warningCount.GetValueOrDefault(0);
+            }
+            set
+            {
+                m_warningCount = value;
+            }
         }
 
-        [DataMember(Order = 55)]
+        public Int32 NoticeCount
-        public Int32? NoticeCount
         {
-            get;
+            get
-            set;
+            {
+                return m_noticeCount.GetValueOrDefault(0);
+            }
+            set
+            {
+                m_noticeCount = value;
+            }
         }
 
         public List<Issue> Issues
         {
             get
             {
-                if (m_issues == null)
-                {
-                    m_issues = new List<Issue>();
-                }
                 return m_issues;
             }
         }
@@ -257,7 +276,7 @@ namespace GitHub.DistributedTask.WebApi
         }
 
         [DataMember(Order = 131)]
-        public String Identifier
+        public string Identifier
         {
             get;
             set;
@@ -274,22 +293,14 @@ namespace GitHub.DistributedTask.WebApi
         {
             get
             {
-                if (m_previousAttempts == null)
-                {
-                    m_previousAttempts = new List<TimelineAttempt>();
-                }
                 return m_previousAttempts;
             }
         }
 
-        public IDictionary<String, VariableValue> Variables
+        public IDictionary<string, VariableValue> Variables
         {
             get
             {
-                if (m_variables == null)
-                {
-                    m_variables = new Dictionary<String, VariableValue>(StringComparer.OrdinalIgnoreCase);
-                }
                 return m_variables;
             }
         }
@@ -299,13 +310,53 @@ namespace GitHub.DistributedTask.WebApi
             return new TimelineRecord(this);
         }
 
-        [DataMember(Name = "Issues", EmitDefaultValue = false, Order = 60)]
+        [OnDeserialized]
+        private void OnDeserialized(StreamingContext context)
+        {
+            this.EnsureInitialized();
+        }
+
+
+        /// <summary>
+        /// DataContractSerializer bypasses all constructor logic and inline initialization!
+        /// This method takes the place of a workhorse constructor for baseline initialization.
+        /// The expectation is for this logic to be accessible to constructors and also to the OnDeserialized helper.
+        /// </summary>
+        private void EnsureInitialized()
+        {
+            // Note that ?? is a short-circuiting operator.  (??= would be preferable, but it's not supported in the .NET Framework version currently used by actions/runner.)
+
+            // De-nullify the following historically-nullable ints.
+            // (After several weeks in production, it may be possible to eliminate these nullable backing fields.)
+            m_errorCount = m_errorCount ?? 0;
+            m_warningCount = m_warningCount ?? 0;
+            m_noticeCount = m_noticeCount ?? 0;
+
+            m_issues = m_issues ?? new List<Issue>();
+            m_previousAttempts = m_previousAttempts ?? new List<TimelineAttempt>();
+            this.Attempt = Math.Max(this.Attempt, 1);
+
+            // Ensure whatever content may have been deserialized for m_variables is backed by a case-insensitive Dictionary.
+            var empty = Enumerable.Empty<KeyValuePair<string, VariableValue>>();
+            m_variables = new Dictionary<string, VariableValue>(m_variables ?? empty, StringComparer.OrdinalIgnoreCase);
+        }
+
+        [DataMember(Name = nameof(ErrorCount), Order = 40)]
+        private Int32? m_errorCount;
+
+        [DataMember(Name = nameof(WarningCount), Order = 50)]
+        private Int32? m_warningCount;
+
+        [DataMember(Name = nameof(NoticeCount), Order = 55)]
+        private Int32? m_noticeCount;
+
+        [DataMember(Name = nameof(Issues), EmitDefaultValue = false, Order = 60)]
         private List<Issue> m_issues;
 
-        [DataMember(Name = "Variables", EmitDefaultValue = false, Order = 80)]
+        [DataMember(Name = nameof(Variables), EmitDefaultValue = false, Order = 80)]
-        private Dictionary<String, VariableValue> m_variables;
+        private Dictionary<string, VariableValue> m_variables;
 
-        [DataMember(Name = "PreviousAttempts", EmitDefaultValue = false, Order = 120)]
+        [DataMember(Name = nameof(PreviousAttempts), EmitDefaultValue = false, Order = 120)]
         private List<TimelineAttempt> m_previousAttempts;
     }
 }

src/Sdk/DTWebApi/WebApi/WellKnownDistributedTaskVariables.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 
 namespace GitHub.DistributedTask.WebApi
 {
@@ -6,5 +6,6 @@ namespace GitHub.DistributedTask.WebApi
     {
         public static readonly String JobId = "system.jobId";
         public static readonly String RunnerLowDiskspaceThreshold = "system.runner.lowdiskspacethreshold";
+        public static readonly String RunnerEnvironment = "system.runnerEnvironment";
     }
 }

src/Sdk/RSWebApi/Contracts/AcquireJobRequest.cs

@@ -0,0 +1,11 @@
+using System.Runtime.Serialization;
+
+namespace GitHub.Actions.RunService.WebApi
+{
+    [DataContract]
+    public class AcquireJobRequest
+    {
+        [DataMember(Name = "jobMessageId", EmitDefaultValue = false)]
+        public string JobMessageId { get; set; }
+    }
+}

src/Sdk/RSWebApi/Contracts/Annotation.cs

@@ -0,0 +1,35 @@
+using System.Runtime.Serialization;
+
+namespace Sdk.RSWebApi.Contracts
+{
+    [DataContract]
+    public struct Annotation
+    {
+        [DataMember(Name = "level", EmitDefaultValue = false)]
+        public AnnotationLevel Level;
+
+        [DataMember(Name = "message", EmitDefaultValue = false)]
+        public string Message;
+
+        [DataMember(Name = "rawDetails", EmitDefaultValue = false)]
+        public string RawDetails;
+
+        [DataMember(Name = "path", EmitDefaultValue = false)]
+        public string Path;
+
+        [DataMember(Name = "isInfrastructureIssue", EmitDefaultValue = false)]
+        public bool IsInfrastructureIssue;
+
+        [DataMember(Name = "startLine", EmitDefaultValue = false)]
+        public long StartLine;
+
+        [DataMember(Name = "endLine", EmitDefaultValue = false)]
+        public long EndLine;
+
+        [DataMember(Name = "startColumn", EmitDefaultValue = false)]
+        public long StartColumn;
+
+        [DataMember(Name = "endColumn", EmitDefaultValue = false)]
+        public long EndColumn;
+    }
+}

src/Sdk/RSWebApi/Contracts/AnnotationLevel.cs

@@ -0,0 +1,20 @@
+using System.Runtime.Serialization;
+
+namespace Sdk.RSWebApi.Contracts
+{
+    [DataContract]
+    public enum AnnotationLevel
+    {
+        [EnumMember]
+        UNKNOWN = 0,
+
+        [EnumMember]
+        NOTICE = 1,
+
+        [EnumMember]
+        WARNING = 2,
+
+        [EnumMember]
+        FAILURE = 3
+    }
+}