cinder/doc/source/contributor/releasecycle.rst

Release Cycle Tasks

This document describes the relative ordering and rough timeline for all of the steps related to tasks that need to be completed during a release cycle for Cinder.

Before PTG (after closing previous release)

1. Collect topics and prepare notes for PTG discussions in an etherpad. The PTGbot will generate a list of etherpads at some point that will be named according to the convention:

   https://etherpad.openstack.org/p/<release-name>-ptg-cinder

   (You can use a different name, but following the convention makes it easy to locate the etherpad for any project for any release. Something we've done in the past is to do the planning on an etherpad named:

   https://etherpad.openstack.org/p/<release-name>-ptg-cinder-planning

   and then move the topics over to the "real" etherpad when the team has decided on what to include and the ordering. Do whatever works for you. Just make sure the team knows where the planning etherpad is and give everyone plenty of reminders to add topics.

2. Add any Cinder-specific schedule information to the release calendar as soon as it's available. Example patch: https://review.opendev.org/c/openstack/releases/+/754484

   • We used to wait to do this until after proposed deadlines were discussed at the PTG, but recently people have been getting antsy about what the deadlines are as soon as the stable branch for the previous release is cut (which is roughly a month before the PTG). So you may want to go ahead and post the patch early and announce the dates at a Cinder meeting so that people can point out conflicts. Or do it the old-fashioned way and work it out at the PTG. Either way, the point is to make sure you don't forget to add Cinder-specific dates to the main release schedule.

3. Review the cinder-groups.

Between Summit and Milestone-1

1. Review output from the PTG and set Review-Priority on any high priority items identified from those discussions. Send out recap to the mailing list.
2. Focus on spec reviews to get them approved and updated early in the cycle to allow enough time for implementation.
3. Review new driver submissions and give early feedback so there isn't a rush at the new driver deadline. Check for status of third party CI and any missing steps they need to know about.
4. Review community-wide goals and decide a plan or response to them.

Milestone-1

1. Propose library releases for os-brick or python-cinderclient if there are merged commits ready to be released. Watch for any releases proposed by the release team.
2. Check progress on new drivers and specs and warn contributors if it looks like they are at risk for making it in this cycle.

Between Milestone-1 and Milestone-2

1. cinderlib is a "trailing" deliverable type on a "cycle-with-intermediary" release model. That means that its release for the previous cycle hasn't happened yet. The release must happen no later than 3 months after the main release, which will put it roughly one week before Milestone-2 (check the current release schedule for the exact deadline). Example patch: https://review.opendev.org/c/openstack/releases/+/742503
2. Review stable backports and release status.
3. The Cinder Spec Freeze usually occurs sometime within this window. After all the approved specs have merged, propose a patch that adds a directory for the next release. (You may have to wait until the release name has been determined by the TC.) Example patch: https://review.opendev.org/c/openstack/cinder-specs/+/778436
4. Watch for and respond to updates to new driver patches.

Milestone-2

1. Propose library releases for os-brick or python-cinderclient if there are merged commits ready to be released. Watch for any releases proposed by the release team.

Between Milestone-2 and Milestone-3

1. Review stable backports and release status.
2. Set Review-Priority for any os-brick changes that are needed for feature work to make sure they are ready by the library freeze prior to Milestone-3.
3. Make sure any new feature work that needs client changes are proposed and on track to land before the client library freeze at Milestone-3. Ensure microversion bumps are reflected in cinderclient/api_versions.py MAX_VERSION.
4. The week before Milestone-3, propose releases for unreleased changes in os-brick. Include branch request for stable/$series creation.

Milestone-3

1. Propose releases for unreleased changes in python-cinderclient and python-brick-cinderclient-ext. Watch for releases proposed by the release team. Include branch request for stable/$series creation.
2. Set Review-Priority -1 for any feature work not complete in time for inclusion in this cycle. Remind contributors that FFE will need to be requested to still allow it in this cycle.
3. Prepare "prelude" release notes as summaries of the content of the release so that those are merged before their first release candidate.
4. Complete the responses to community-wide goals if not already done.
5. Start assembling cycle-highlights for the team.

Between Milestone-3 and RC1

1. Add cycle-highlights in the releases deliverable file.
2. Make sure the maximum microversion is up-to-date in the version history file cinder/api/openstack/rest_api_version_history.rst
   • Any patch that bumped the microversion should have already included an entry in this file; you need to add "(Maximum in <release-name>)" to the last (highest) entry.
   • This file is pulled into the api-ref by the documentation build process.
3. Check the "Driver Removal History" section (bottom) of doc/source/reference/support-matrix.rst to make sure any drivers removed during the cycle are mentioned there.
4. Check the upgrade check tool cmd/status.py to make sure the removed drivers list is up to date.

RC1 week

1. Propose RC1 release for cinder or watch for proposal from the release team. Include stable/$series branching request with the release.
2. Finalize any cycle-highlights for the release cycle.
3. Remind contributors that master is now the next cycle but focus should be on wrapping up the current cycle.
4. Watch for translation and new stable branch patches and merge them quickly.

Between RC1 and Final

1. Propose additional RC releases as needed.

   Note

   Try to avoid creating more than 3 release candidates so we are not creating candidates that consumers are then trained to ignore. Each release candidate should be kept for at least 1 day, so if there is a proposal to create RCx but clearly a reason to create another one, delay RCX to include the additional patches.

2. Watch for translation patches and merge them quickly.

3. Make sure final RC request is done one week before the final release date.

4. Watch for the final release proposal from the release team to review and +1 so team approval is included in the metadata that goes onto the signed tag.

Final Release

1. Start planning for next release cycle.
2. Check for bugfixes that would be good to backport to older stable branches.
3. Propose any bugfix releases for things that did not make the freeze for final library or service releases.

Post-Final Release

1. Make sure at least three SQLAlchemy-Migrate migrations are reserved for potential backports. Example patch: https://review.opendev.org/c/openstack/cinder/+/649436
2. Unblock any new driver submission patches that missed the previous release cycle's deadline.
3. Review approved cinder-specs that were merged to the previous cycle folder that did not get implemented. Revert or move those specs to the next cycles's folder.
4. The oldest active stable branch (that is, the oldest one you can still release from) will go to Extended Maintenance mode shortly after the coordinated release. Watch for an email notification from the release team about the projected date, which you can also find in the "Next Phase" column for that release series on https://releases.openstack.org
   • Prioritize any open reviews that should get into the final stable release from this branch for all relevant cinder deliverables and motivate the cinder-stable-maint cores to review them.
   • Propose a final release for any deliverable that needs one. Example patch: https://review.opendev.org/c/openstack/releases/+/761929
   • The release team will probably propose a placeholder patch to tag the stable branch for each deliverable as <release>-em (or if they haven't gotten around to it yet, you can propose it yourself). Verify that the hash is at the current HEAD for each deliverable (it may have changed if some last-minute stuff was merged). Example patch: https://review.opendev.org/c/openstack/releases/+/762372
   • After the "transition to EM" patch has merged, update the zuul jobs for the cinder-tempest-plugin. We always have 3 jobs for the active stable branches plus jobs for master. Add a new job for the most recent release and remove the job for the stable branch that just went to EM. Example patch: https://review.opendev.org/c/openstack/cinder-tempest-plugin/+/756330