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Release Process

Overview

The Gateway API project is an API project that has the following two components:

  • Kubernetes Custom Resource Definitions (CRDs)
  • Corresponding Go API in the form of sigs.k8s.io/gateway-api Go package

This repository is the home for both of the above components.

Versioning strategy

The versioning strategy for this project is covered in detail in the release documentation.

Releasing a new version

Writing a Changelog

To simplify release notes generation, we recommend using the Kubernetes release notes generator:

go install k8s.io/release/cmd/release-notes@latest
export GITHUB_TOKEN=your_token_here
release-notes --start-sha EXAMPLE_COMMIT --end-sha EXAMPLE_COMMIT --branch main --repo gateway-api --org kubernetes-sigs

This output will likely need to be reorganized and cleaned up a bit, but it provides a good starting point. Once you're satisfied with the changelog, create a PR. This must go through the regular PR review process and get merged into the main branch. Approval of the PR indicates community consensus for a new release.

Release Steps

The following steps must be done by one of the Gateway API maintainers:

For a PATCH release:

  • Create a new branch in your fork named something like <githubuser>/release-x.x.x. Use the new branch in the upcoming steps.
  • Use git to cherry-pick all relevant PRs into your branch.
  • Update pkg/generator/main.go with the new semver tag and any updates to the API review URL.
  • Run the following command BASE_REF=vmajor.minor.patch make generate which will update generated docs and webhook with the correct version info. (Note that you can't test with these YAMLs yet as they contain references to elements which wont exist until the tag is cut and image is promoted to production registry.)
  • Create a pull request of the <githubuser>/release-x.x.x branch into the release-x.x branch upstream (which should already exist since this is a patch release). Add a hold on this PR waiting for at least one maintainer/codeowner to provide a lgtm.
  • Verify the CI tests pass and merge the PR into release-x.x.
  • Create a tag using the HEAD of the release-x.x branch. This can be done using the git CLI or Github's release page.
  • Run the make build-install-yaml command which will generate install files in the release/ directory. Attach these files to the Github release.
  • Update the README.md and site-src/guides/index.md files to point links and examples to the new release.

For a MAJOR or MINOR release:

  • Cut a release-major.minor branch that we can tag things in as needed.
  • Check out the release-major.minor release branch locally.
  • Update pkg/generator/main.go with the new semver tag and any updates to the API review URL.
  • Run the following command BASE_REF=vmajor.minor.patch make generate which will update generated docs and webhook with the correct version info. (Note that you can't test with these YAMLs yet as they contain references to elements which wont exist until the tag is cut and image is promoted to production registry.)
  • Verify the CI tests pass before continuing.
  • Create a tag using the HEAD of the release-x.x branch. This can be done using the git CLI or Github's release page.
  • Run the make build-install-yaml command which will generate install files in the release/ directory. Attach these files to the Github release.
  • Update the README.md and site-src/guides/index.md files to point links and examples to the new release.

For an RC release:

  • Update pkg/generator/main.go with the new semver tag and any updates to the API review URL.
  • Run the following command BASE_REF=vmajor.minor.patch make generate which will update generated docs and webhook with the correct version info. (Note that you can't test with these YAMLs yet as they contain references to elements which wont exist until the tag is cut and image is promoted to production registry.)
  • Include the changelog update in this PR.
  • Merge the update PR.
  • Tag the release using the commit on main where the changelog update merged. This can be done using the git CLI or Github's release page.
  • Run the make build-install-yaml command which will generate install files in the release/ directory.
  • Attach these files to the Github release.

Promoting images to production registry

Gateway API follows the standard kubernetes image promotion process described here.

  1. Once the tag has been cut and the image is available in the staging registry, identify the SHA-256 image digest of the image that you want to promote.
  2. Modify the k8s-staging-gateway-api/images.yaml file under kubernetes/k8s.io repository and add the image digest along with the new tag under the correct component.
    1. Currently, the following images are included: admission-server, echo-server
  3. Create a PR with the above changes.
  4. Image will get promoted by automated prow jobs once the PR merges