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cherry-picks.md

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Overview

This document explains cherry picks are managed on release branches within the Kubernetes projects. Patches are either applied in batches or individually depending on the point in the release cycle.

Propose a Cherry Pick

  1. Cherrypicks are [managed with labels and milestones] (pull-requests.md#release-notes)
  2. To get a PR merged to the release branch, first ensure the following labels are on the original master branch PR:
  • An appropriate milestone (e.g. v1.3)
  • The cherrypick-candidate label
  1. If release-note-none is set on the master PR, the cherrypick PR will need to set the same label to confirm that no release note is needed.
  2. release-note labeled PRs generate a release note using the PR title by default OR the release-note block in the PR template if filled in.
  • See the PR template for more details.
  • PR titles and body comments are mutable and can be modified at any time prior to the release to reflect a release note friendly message.

How do cherrypick-candidates make it to the release branch?

  1. BATCHING: After a branch is first created and before the X.Y.0 release
  • Branch owners review the list of cherrypick-candidate labeled PRs.
  • PRs batched up and merged to the release branch get a cherrypick-approved label and lose the cherrypick-candidate label.
  • PRs that won't be merged to the release branch, lose the cherrypick-candidate label.
  1. INDIVIDUAL CHERRYPICKS: After the first X.Y.0 on a branch
  • Run the cherry pick script. This example applies a master branch PR #98765 to the remote branch upstream/release-3.14: hack/cherry_pick_pull.sh upstream/release-3.14 98765
  • Your cherrypick PR (targeted to the branch) will immediately get the do-not-merge label. The branch owner will triage PRs targeted to the branch and label the ones to be merged by applying the lgtm label.

There is an issue open tracking the tool to automate the batching procedure.

Cherry Pick Review

Cherry pick pull requests are reviewed differently than normal pull requests. In particular, they may be self-merged by the release branch owner without fanfare, in the case the release branch owner knows the cherry pick was already requested - this should not be the norm, but it may happen.

Searching for Cherry Picks

See the cherrypick queue dashboard for status of PRs labeled as cherrypick-candidate.

Contributor License Agreements is considered implicit for all code within cherry-pick pull requests, unless there is a large conflict.

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