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feat: Add container to propagate host network MTU (#1201)

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* feat: Add container to propagate host network MTU

Some network environments use non-standard MTU values. In these
situations, the `DockerMTU` setting might be used to specify the MTU
setting for the `bridge` network created by Docker. However, when the
Github Actions workflow creates networks, it doesn't propagate the
`bridge` network MTU which can lead to `connection reset by peer`
messages.

To overcome this, I've created a new docker image called
`summerwind/actions-runner-mtu` that shims the docker binary in order to
propagate the MTU setting to networks created by Github workflows.

This is a follow-up on the discussion in
(#1046)[https://github.com/actions-runner-controller/actions-runner-controller/issues/1046]
and uses a separate image since there might be some unintended
side-effects with this approach.

* fixup! feat: Add container to propagate host network MTU

Co-authored-by: Yusuke Kuoka <ykuoka@gmail.com>
This commit is contained in:
Tiago Melo
2022-09-23 09:08:28 +01:00
committed by GitHub
parent 8f54644b08
commit e7a21cfc53
6 changed files with 48 additions and 11 deletions
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2
runner/actions-runner-dind.dockerfile
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@@ -69,7 +69,7 @@ RUN export ARCH=$(echo ${TARGETPLATFORM} | cut -d / -f2) \
tar --extract \
--file docker.tgz \
--strip-components 1 \
--directory /usr/local/bin/ \
--directory /usr/bin/ \
; \
rm docker.tgz; \
dockerd --version; \