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README.md

Images

Each subdirectory corresponds to an image that is automatically built and pushed to gcr.io/k8s-testimages when PRs that touch them merge using postsubmit prowjobs that run the image-builder

Updating test-infra images

We have bazel images that have two versions of bazel installed. The upgrade process is as follows:

  • Ensure .bazelversion file matches one of the versions in these three images:
  • Choose the new target the bazel release blog, such as 3.1
    • Ensure the repo-infra release supports bazel >= the target vesion.
      • Look in load.bzl to see which repo-infra tag is used.
      • If necessary, update the bazel_toolchains version in repo-infra's load.bzl to the latest [bazel-toolchains release].
      • Cut a new repo-infra release with this change.
      • Update test-infra's load.bzl to use this repo-infra release.
  • Create a PR to make images to include both the current and target version:
    • The old version should match what is currently in .bazelversion
    • The new version should be the target version.
    • images/bazel's test-infra variant
    • images/bazelbuild's test-infra variant
  • Merge the PR
    • This should postsubmits to create the bazel and bazelbuild images.
  • Update usage to these new images
    • Manually update the bazel-base digtest in containers.bzl to the new image.
      • NOTE: must update the digest (the tag param is just documentation)
      • TODO(fejta): this should be done automatically like the others
    • The periodic prow autobump job should make a PR to start using these images an hour later.
    • The next day oncall should merge this PR, at which point they will start getting used.
  • Create a PR to change .bazelversion to the target version.
    • This should cause presubmits to try and use the new version.
    • Merging the PR will cause postsubmis/periodics to start using it.

Testing Images

There is no automated testing pipeline for images:

  • Any jobs that use the :latest tag use the latest published image immediately
  • Any jobs that use a :v{date}-{sha}[-{variant}] tag (e.g. :v20200407-c818676-master) are updated to use the latest published image ~daily. This is accomplished by PR's created by the autobumper prowjob, which are merged by test-infra oncall once a day during weekdays.

  1. Merge a PR changing something in the image directory.

  2. Grep the prowjob configs to find out which jobs are using gcr.io/k8s-testimages/<image-name>:latest and monitor TestGrid for new failures corresponding to your change.

    • On failure, send a new PR to rollback your last one or a fix if you know immediately.
    • Some of these images might be presubmits; you could monitor them at http://prow.k8s.io

  3. You are done. If more breaks happen later, test-infra oncall will take care of it.