Merge branch 'main' of https://github.com/actions/runner into vscode-launch-scripts

This commit is contained in:
Ferenc Hammerl
2021-05-26 15:23:10 +02:00
7 changed files with 79 additions and 64 deletions

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@@ -1,4 +1,4 @@
# ADR 263: Self Hosted Runner Proxies
# ADR 263: Self-Hosted Runner Proxies
**Date**: 2019-11-13
@@ -6,13 +6,13 @@
## Context
- Proxy support is required for some enterprises and organizations to start using their own self hosted runners
- While there is not a standard convention, many applications support setting proxies via the environmental variables `http_proxy`, `https_proxy`, `no_proxy`, such as curl, wget, perl, python, docker, git, R, ect
- Proxy support is required for some enterprises and organizations to start using their own self-hosted runners
- While there is not a standard convention, many applications support setting proxies via the environment variables `http_proxy`, `https_proxy`, `no_proxy`, such as curl, wget, perl, python, docker, git, and R
- Some of these applications use `HTTPS_PROXY` versus `https_proxy`, but most understand or primarily support the lowercase variant
## Decision
We will update the Runner to use the conventional environment variables for proxies: `http_proxy`, `https_proxy` and `no_proxy` if they are set.
We will update the Runner to use the conventional environment variables for proxies: `http_proxy`, `https_proxy`, and `no_proxy` if they are set.
These are described in detail below:
- `https_proxy` a proxy URL for all https traffic. It may contain basic authentication credentials. For example:
- http://proxy.com
@@ -22,20 +22,20 @@ These are described in detail below:
- http://proxy.com
- http://127.0.0.1:8080
- http://user:password@proxy.com
- `no_proxy` a comma separated list of hosts that should not use the proxy. An optional port may be specified
- `no_proxy` a comma-separated list of hosts that should not use the proxy. An optional port may be specified. For example:
- `google.com`
- `yahoo.com:443`
- `google.com,bing.com`
We won't use `http_proxy` for https traffic when `https_proxy` is not set, this behavior lines up with any libcurl based tools (curl, git) and wget.
Otherwise action authors and workflow users need to adjust to differences between the runner proxy convention, and tools used by their actions and scripts.
Otherwise, action authors and workflow users need to adjust to differences between the runner proxy convention, and tools used by their actions and scripts.
Example:
Customer set `http_proxy=http://127.0.0.1:8888` and configure the runner against `https://github.com/owner/repo`, with the `https_proxy` -> `http_proxy` fallback, the runner will connect to the server without any problem. However, if a user runs `git push` to `https://github.com/owner/repo`, `git` won't use the proxy since it requires `https_proxy` to be set for any https traffic.
Customer sets `http_proxy=http://127.0.0.1:8888` and configures the runner against `https://github.com/owner/repo`, with the `https_proxy` -> `http_proxy` fallback, the runner will connect to the server without any problem. However, if a user runs `git push` to `https://github.com/owner/repo`, `git` won't use the proxy since it requires `https_proxy` to be set for any https traffic.
> `golang`, `node.js` and other dev tools from the linux community use `http_proxy` for both http and https traffic based on my research.
> `golang`, `node.js`, and other dev tools from the Linux community use `http_proxy` for both http and https traffic based on my research.
A majority of our users are using Linux where these variables are commonly required to be set by various programs. By reading these values, we simplify the process for self hosted runners to set up proxy, and expose it in a way users are already familiar with.
A majority of our users are using Linux where these variables are commonly required to be set by various programs. By reading these values, we simplify the process for self-hosted runners to set up a proxy and expose it in a way users are already familiar with.
A password provided for a proxy will be masked in the logs.
@@ -43,19 +43,19 @@ We will support the lowercase and uppercase variants, with lowercase taking prio
### No Proxy Format
While exact implementations are different per application on handle `no_proxy` env, most applications accept a comma separated list of hosts. Some accept wildcard characters (*). We are going to do exact case-insensitive matches, and not support wildcards at this time.
While exact implementations are different per application on handling `no_proxy` env, most applications accept a comma-separated list of hosts. Some accept wildcard characters (`*`). We are going to do exact case-insensitive matches, and not support wildcards at this time.
For example:
- example.com will match example.com, foo.example.com, foo.bar.example.com
- foo.example.com will match bar.foo.example.com and foo.example.com
- `example.com` will match `example.com`, `foo.example.com`, and `foo.bar.example.com`
- `foo.example.com` will match `bar.foo.example.com` and `foo.example.com`
We will not support IP addresses for `no_proxy`, only hostnames.
## Consequences
1. Enterprises and organizations needing proxy support will be able to embrace self hosted runners
2. Users will need to set these environmental variables before configuring the runner in order to use a proxy when configuring
3. The runner will read from the environmental variables during config and runtime and use the provided proxy if it exists
4. Users may need to pass these environmental variables into other applications if they do not natively take these variables
5. Action authors may need to update their workflows to react to the these environment variables
6. We will document the way of setting environmental variables for runners using the environment variables and how the runner uses them
7. Like all other secrets, users will be able to relatively easily figure out proxy password if they can modify a workflow file running on a self hosted machine
1. Enterprises and organizations needing proxy support will be able to embrace self-hosted runners
2. Users will need to set these environment variables before configuring the runner in order to use a proxy when configuring
3. The runner will read from the environment variables during config and runtime and use the provided proxy if it exists
4. Users may need to pass these environment variables into other applications if they do not natively take these variables
5. Action authors may need to update their workflows to react to these environment variables
6. We will document the way of setting environment variables for runners using the environment variables and how the runner uses them
7. Like all other secrets, users will be able to relatively easily figure out the proxy password if they can modify a workflow file running on a self-hosted machine

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@@ -8,7 +8,7 @@
run-actions run scripts using a platform specific shell:
`bash -eo pipefail` on non-windows, and `cmd.exe /c /d /s` on windows
The `shell` option overwrites this to allow different flags or completely different shells/interpreters
The `shell` option overrides this to allow different flags or completely different shells/interpreters
A small example is:
```yml

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@@ -5,7 +5,7 @@
**Status**: Accepted
## Context
First party action `actions/cache` needs a input which is an explicit `key` used for restoring and saving the cache. For packages caching, the most comment `key` might be the hash result of contents from all `package-lock.json` under `node_modules` folder.
First party action `actions/cache` needs a input which is an explicit `key` used for restoring and saving the cache. For packages caching, the most common `key` might be the hash result of contents from all `package-lock.json` under `node_modules` folder.
There are serval different ways to get the hash `key` input for `actions/cache` action.
@@ -38,7 +38,7 @@ There are serval different ways to get the hash `key` input for `actions/cache`
`hashFiles()` will only support hashing files under the `$GITHUB_WORKSPACE` since the expression evaluated on the runner, if customer use job container or container action, the runner won't have access to file system inside the container.
`hashFiles()` will only take 1 parameters:
- `hashFiles('**/package-lock.json')` // Search files under $GITHUB_WORKSPACE and calculate a hash for them
- `hashFiles('**/package-lock.json')` // Search files under `$GITHUB_WORKSPACE` and calculate a hash for them
**Question: Do we need to support more than one match patterns?**
Ex: `hashFiles('**/package-lock.json', '!toolkit/core/package-lock.json', '!toolkit/io/package-lock.json')`
@@ -52,7 +52,7 @@ This will help customer has better experience with the `actions/cache` action's
key: ${{hashFiles('**/package-lock.json')}}-${{github.ref}}-${{runner.os}}
```
For search pattern, we will use basic globbing (`*` `?` and `[]`) and globstar (`**`).
For search pattern, we will use basic globbing (`*`, `?`, and `[]`) and globstar (`**`).
Additional pattern details:
- Root relative paths with `github.workspace` (the main repo)
@@ -68,4 +68,4 @@ Hashing logic:
5. Use SHA256 to hash all stored files' hash results to get the final 64 chars hash result.
**Question: Should we include the folder structure info into the hash?**
Answer: No
Answer: No

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@@ -6,10 +6,10 @@
## Context
In addition to action's regular execution, action author may wants their action has a chance to participate in:
- Job initialize
My Action will collect machine resource usage (CPU/RAM/Disk) during a workflow job execution, we need to start perf recorder at the begin of the job.
- Job cleanup
In addition to action's regular execution, action author may wants their action to have a chance to participate in:
- Job initialization
My Action will collect machine resource usage (CPU/RAM/Disk) during a workflow job execution, we need to start perf recorder at the beginning of the job.
- Job cleanup
My Action will dirty local workspace or machine environment during execution, we need to cleanup these changes at the end of the job.
Ex: `actions/checkout@v2` will write `github.token` into local `.git/config` during execution, it has post job cleanup defined to undo the changes.
@@ -46,12 +46,12 @@ Container Action Example:
post-if: 'success()' // Optional
```
Both `pre` and `post` will has default `pre-if/post-if` sets to `always()`.
Both `pre` and `post` will have default `pre-if/post-if` set to `always()`.
Setting `pre` to `always()` will make sure no matter what condition evaluate result the `main` gets at runtime, the `pre` has always run already.
`pre` executes in order of how the steps are defined.
`pre` will always be added to job steps list during job setup.
> Action referenced from local repository (`./my-action`) won't get `pre` setup correctly since the repository haven't checkout during job initialize.
> We can't use GitHub api to download the repository since there is a about 3 mins delay between `git push` and the new commit available to download using GitHub api.
> Action referenced from local repository (`./my-action`) won't get `pre` setup correctly since the repository haven't checked-out during job initialization.
> We can't use GitHub api to download the repository since there is about a 3 minute delay between `git push` and the new commit available to download using GitHub api.
`post` will be pushed into a `poststeps` stack lazily when the action's `pre` or `main` execution passed `if` condition check and about to run, you can't have an action that only contains a `post`, we will pop and run each `post` after all `pre` and `main` finished.
> Currently `post` works for both repository action (`org/repo@v1`) and local action (`./my-action`)
@@ -60,7 +60,7 @@ Valid action:
- only has `main`
- has `pre` and `main`
- has `main` and `post`
- has `pre`, `main` and `post`
- has `pre`, `main`, and `post`
Invalid action:
- only has `pre`

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@@ -13,13 +13,13 @@ This is another version of [ADR275](https://github.com/actions/runner/pull/275)
## Decision
This ADR proposes that we add a `--labels` option to `config`, which could be used to add custom additional labels to the configured runner.
This ADR proposes that we add a `--labels` option to the `config`, which could be used to add custom additional labels to the configured runner.
For example, to add a single extra label the operator could run:
For example, to add a single additional label the operator could run:
```bash
./config.sh --labels mylabel
```
> Note: the current runner command line parsing and envvar override algorithm only supports a single argument (key).
> Note: the current runner command line parsing and envvar override algorithm only support a single argument (key).
This would add the label `mylabel` to the runner, and enable users to select the runner in their workflow using this label:
```yaml
@@ -39,17 +39,17 @@ runs-on: [self-hosted, mylabel, anotherlabel]
It would not be possible to remove labels from an existing runner using `config.sh`, instead labels would have to be removed using the GitHub UI.
The labels argument will split on commas, trim and discard empty strings. That effectively means don't use commans in unattended config label names. Alternatively we could choose to escape commans but it's a nice to have.
The labels argument will split on commas, trim and discard empty strings. That effectively means don't use commas in unattended config label names. Alternatively, we could choose to escape commas but it's a nice to have.
## Replace
If an existing runner exists and the option to replace is chosen (interactively of via unattend as in this scenario), then the labels will be replaced / overwritten (not merged).
If an existing runner exists and the option to replace is chosen (interactively or via unattended as in this scenario), then the labels will be replaced/overwritten (not merged).
## Overriding built-in labels
Note that it is possible to register "built-in" hosted labels like `ubuntu-latest` and is not considered an error. This is an effective way for the org / runner admin to dictate by policy through registration that this set of runners will be used without having to edit all the workflow files now and in the future.
Note that it is possible to register "built-in" hosted labels like `ubuntu-latest` and is not considered an error. This is an effective way for the org/runner admin to dictate by policy through registration that this set of runners will be used without having to edit all the workflow files now and in the future.
We will also not make other restrictions such as limiting explicitly adding os / arch labels and validating. We will assume that explicit labels were added for a reason and not restricting offers the most flexibility and future proofing / compat.
We will also not make other restrictions such as limiting explicitly adding os/arch labels and validating. We will assume that explicit labels were added for a reason and not restricting offers the most flexibility and future-proofing / compatibility.
## Consequences

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@@ -8,17 +8,17 @@
Customers want to be able to compose actions from actions (ex: https://github.com/actions/runner/issues/438)
An important step towards meeting this goal is to build in functionality for actions where users can simply execute any number of steps.
An important step towards meeting this goal is to build functionality for actions where users can simply execute any number of steps.
### Guiding Principles
We don't want the workflow author to need to know how the internal workings of the action work. Users shouldn't know the internal workings of the composite action (for example, `default.shell` and `default.workingDir` should not be inherited from the workflow file to the action file). When deciding how to design certain parts of composite run steps, we want to think one logical step from the consumer.
We don't want the workflow author to need to know how the internal workings of the action work. Users shouldn't know the internal workings of the composite action (for example, `default.shell` and `default.workingDir` should not be inherited from the workflow file to the action file). When deciding how to design certain parts of composite run steps, we want to treat it as one logical step for the consumer.
A composite action is treated as **one** individual job step (this is known as encapsulation).
## Decision
**In this ADR, we only support running multiple run steps in an Action.** In doing so, we build in support for mapping and flowing the inputs, outputs, and env variables (ex: All nested steps should have access to its parents' input variables and nested steps can overwrite the input variables).
**In this ADR, we only support running multiple run steps in an Action.** In doing so, we build in support for mapping and flowing the inputs, outputs, and env variables (ex: All nested steps should have access to their parents' input variables and nested steps can overwrite the input variables).
### Composite Run Steps Features
This feature supports at the top action level:
@@ -92,7 +92,7 @@ We will not support "defaults" in a composite action.
### Shell and Working-directory
For each run step in a composite action, the action author can set the `shell` and `working-directory` attributes for that step. The shell attribute is **required** for each run step because the action author does not know what the workflow author is using for the operating system so we need to explicitly prevent unknown behavior by making sure that each run step has an explicit shell **set by the action author.** On the other hand, `working-directory` is optional. Moreover, the composite action author can map in values from the `inputs` for it's `shell` and `working-directory` attributes at the step level for an action.
For each run step in a composite action, the action author can set the `shell` and `working-directory` attributes for that step. The shell attribute is **required** for each run step because the action author does not know what the workflow author is using for the operating system so we need to explicitly prevent unknown behavior by making sure that each run step has an explicit shell **set by the action author.** On the other hand, `working-directory` is optional. Moreover, the composite action author can map in values from the `inputs` for its `shell` and `working-directory` attributes at the step level for an action.
For example,
@@ -218,9 +218,9 @@ Example Output:
random-number 43243
```
Each of the output variables from the composite action is viewable from the workflow file that uses the composite action. In other words, every child action output(s) is viewable only by its parent using dot notation (ex `steps.foo.outputs.random-number`).
Each of the output variables from the composite action is viewable from the workflow file that uses the composite action. In other words, every child's action output(s) are only viewable by its parent using dot notation (ex `steps.foo.outputs.random-number`).
Moreover, the output ids are only accessible within the scope where it was defined. Note that in the example above, in our `workflow.yml` file, it should not have access to output id (i.e. `random-id`). The reason why we are doing this is because we don't want to require the workflow author to know the internal workings of the composite action.
Moreover, the output ids are only accessible within the scope where it was defined. Note that in the example above, in our `workflow.yml` file, it should not have access to output id (i.e. `random-id`). The reason why we are doing this is that we don't want to require the workflow author to know the internal workings of the composite action.
### Context
@@ -237,9 +237,9 @@ In the Composite Action, you'll only be able to use `::set-env::` to set environ
We'll pass the secrets from the composite action's parents (ex: the workflow file) to the composite action. Secrets can be created in the composite action with the secrets context. In the actions yaml, we'll automatically mask the secret.
### If Condition
### If-Condition
** If and needs conditions will not be supported in the composite run steps feature. It will be supported later on in a new feature. **
** `If` and `needs` conditions will not be supported in the composite run steps feature. It will be supported later on in a new feature. **
Old reasoning:
@@ -248,7 +248,7 @@ Example `workflow.yml`:
```yaml
steps:
- run: exit 1
- uses: user/composite@v1 # <--- this will run, as it's marked as always runing
- uses: user/composite@v1 # <--- this will run, as it's marked as always running
if: always()
```
@@ -269,15 +269,15 @@ runs:
shell: bash
```
**We will not support "if Condition" in a composite action for now. This functionality will be focused on in a future ADR.**
**We will not support "if-condition" in a composite action for now. This functionality will be focused on in a future ADR.**
See the paragraph below for a rudimentary approach (thank you to @cybojenix for the idea, example, and explanation for this approach):
The `if` statement in the parent (in the example above, this is the `workflow.yml`) shows whether or not we should run the composite action. So, our composite action will run since the `if` condition for running the composite action is `always()`.
**Note that the if condition on the parent does not propagate to the rest of its children though.**
**Note that the "if-condition" on the parent does not propagate to the rest of its children though.**
In the child action (in this example, this is the `action.yml`), it starts with a clean slate (in other words, no imposing if conditions). Similar to the logic in the paragraph above, `echo "I will run, as my current scope is succeeding"` will run since the `if` condition checks if the previous steps **within this composite action** has not failed. `run: echo "I will not run, as my current scope is now failing"` will not run since the previous step resulted in an error and by default, the if expression is set to `success()` if the if condition is not set for a step.
In the child action (in this example, this is the `action.yml`), it starts with a clean slate (in other words, no imposing if-conditions). Similar to the logic in the paragraph above, `echo "I will run, as my current scope is succeeding"` will run since the `if` condition checks if the previous steps **within this composite action** have not failed. `run: echo "I will not run, as my current scope is now failing"` will not run since the previous step resulted in an error and by default, the if expression is set to `success()` if the if-condition is not set for a step.
What if a step has `cancelled()`? We do the opposite of our approach above if `cancelled()` is used for any of our composite run steps. We will cancel any step that has this condition if the workflow is cancelled at all.
@@ -314,13 +314,13 @@ runs:
**We will not support "timeout-minutes" in a composite action for now. This functionality will be focused on in a future ADR.**
A composite action in its entirety is a job. You can set both timeout-minutes for the whole composite action or its steps as long as the the sum of the `timeout-minutes` for each composite action step that has the attribute `timeout-minutes` is less than or equals to `timeout-minutes` for the composite action. There is no default timeout-minutes for each composite action step.
A composite action in its entirety is a job. You can set both timeout-minutes for the whole composite action or its steps as long as the sum of the `timeout-minutes` for each composite action step that has the attribute `timeout-minutes` is less than or equals to `timeout-minutes` for the composite action. There is no default timeout-minutes for each composite action step.
If the time taken for any of the steps in combination or individually exceed the whole composite action `timeout-minutes` attribute, the whole job will fail (1). If an individual step exceeds its own `timeout-minutes` attribute but the total time that has been used including this step is below the overall composite action `timeout-minutes`, the individual step will fail but the rest of the steps will run based on their own `timeout-minutes` attribute (they will still abide by condition (1) though).
If the time taken for any of the steps in combination or individually exceeds the whole composite action `timeout-minutes` attribute, the whole job will fail (1). If an individual step exceeds its own `timeout-minutes` attribute but the total time that has been used including this step is below the overall composite action `timeout-minutes`, the individual step will fail but the rest of the steps will run based on their own `timeout-minutes` attribute (they will still abide by condition (1) though).
For reference, in the example above, if the composite step `foo1` takes 11 minutes to run, that step will fail but the rest of the steps, `foo1` and `foo2`, will proceed as long as their total runtime with the previous failed `foo1` action is less than the composite action's `timeout-minutes` (50 minutes). If the composite step `foo2` takes 51 minutes to run, it will cause the whole composite action job to fail. I
For reference, in the example above, if the composite step `foo1` takes 11 minutes to run, that step will fail but the rest of the steps, `foo1` and `foo2`, will proceed as long as their total runtime with the previous failed `foo1` action is less than the composite action's `timeout-minutes` (50 minutes). If the composite step `foo2` takes 51 minutes to run, it will cause the whole composite action job to fail.
The rationale behind this is that users can configure their steps with the `if` condition to conditionally set how steps rely on each other. Due to the additional capabilities that are offered with combining `timeout-minutes` and/or `if`, we wanted the `timeout-minutes` condition to be as dumb as possible and not effect other steps.
The rationale behind this is that users can configure their steps with the `if` condition to conditionally set how steps rely on each other. Due to the additional capabilities that are offered with combining `timeout-minutes` and/or `if`, we wanted the `timeout-minutes` condition to be as dumb as possible and not affect other steps.
[Usage limits still apply](https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions?query=if%28%29#usage-limits)
@@ -361,7 +361,7 @@ For the composite action steps, it follows the same logic as above. In this exam
### Visualizing Composite Action in the GitHub Actions UI
We want all the composite action's steps to be condensed into the original composite action node.
Here is a visual represenation of the [first example](#Steps)
Here is a visual representation of the [first example](#Steps)
```yaml
| composite_action_node |

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@@ -39,7 +39,7 @@ Navigate to the `src` directory and run the following command:
* `build` (`b`): Build everything and update runner layout folder
* `test` (`t`): Build runner binaries and run unit tests
Sample developer flow:
**Sample developer flow:**
```bash
git clone https://github.com/actions/runner
@@ -51,19 +51,34 @@ cd ./src
./dev.(sh/cmd) test # run all unit tests before git commit/push
```
View logs:
**Configure Runner:**
```bash
cd runner/_layout
./config.sh # configure your custom runner
```
You will need your the name of your repository and a runner registration token.
You can find both at `https://github.com/{your-repo}/settings/actions/runners/new`
These can also be passed down as arguments to `config.(sh/cmd)`:
```bash
cd runner/_layout
./config.sh --url https://github.com/{your-repo} --token ABCABCABCABCABCABCABCABCABCAB
```
**Run Runner (Configure first!):**
```bash
cd runner/_layout
./run.sh # run your custom runner
```
**View logs:**
```bash
cd runner/_layout/_diag
ls
cat (Runner/Worker)_TIMESTAMP.log # view your log file
```
Run Runner:
```bash
cd runner/_layout
./run.sh # run your custom runner
```
### Editors
[Using Visual Studio Code](https://code.visualstudio.com/)