• Process Name: Release Manager Rotation Process

• Process Owner: Francis Lacoste

• Parent Process/Activity: None

• Supported Policy: None

Process Overview

Each cycle a different engineer takes the role of release manager. The release manager coordinates with the release team and all team leads to ensure that the tree is ready for the roll-out and that all critical bugs are in or worked-around.

Back-up release managers are the two RMs from the previous two cycles.

Release Manager inputs

• Email and IRC messages from engineers and team leads.
• OOPS reports
• Merge proposals

Activities

Before the roll-out

• At the beginning of week 4. Make sure that release-critical was turned on in PQM. (Monday 00:00 UTC)

• Update the #launchpad-dev topic to state we are in 'Release Critical' and to list the release manager.

• Maintain the list of the Current roll-out blockers

  • The release manager should poll the team leads and QA engineers continuously to ensure that the list of release blockers is up-to-date. (We need to explore a work-around to retire this wiki page and do the management in Launchpad.) All bugs that are likely to cause lots of OOPSes, time-outs or prevent several users from working are good CRB candidates. It's a good idea to subscribe yourself to the page. (Currently broken.)
• Make sure that developers are assigned to all problems we want to fix.
• Review release-critical merge proposals. The policy should be:
  • All RC candidates go through the normal review process.
  • After code and UI review the MP is left in 'Needs Review' state.
  • A new review of type 'release-critical' is added to the MP and assigned to the release manager.
  • If the MP is approved for 'release-critical', the review is marked 'Approve' and the state of the MP is set to 'Approved'.

On the day before the roll-out

• Request that landing to the devel branch be closed, 24 hours before the scheduled release. All changes should on the last day be merged through db-devel.

On the day of the roll-out

• Chase up Current Rollout Blockers and any other pending release-critical fixes.

• With PQM remaining open, have the LOSAs stop buildbot and set it do manual runs.

• Remind people that all changes need to be in buildbot for 9 hours before the roll-out time. The LOSAs require two hours of pre-release preparation and we need to allow for two complete buildbot cycles. (9 = 2 + 2 * 3.5)

• In the case of failures, it's best to roll-out the last-known-good-build rather than delaying the release. The cut-off point to decide which revision

  to roll out is 2 hours before the scheduled release.

After the roll-out

• With the QA engineers, review the OOPS reports.
  • All common OOPSes are candidates for more release-critical fixes and scheduling another roll-out.
• Prepare and schedule any necessary re-roll.
• When a re-roll is needed, same activities than in the pre-roll out case.
• Open the tree, when the released version is fine for the next cycle.
• The release-manager needs to select the next release manager.

Release critical policy

• To apply for a release-critical approval, you must have a reviewed merge proposal on Launchpad. The engineer adds a review of type

  release-critical to the merge proposal and ensures it is in the 'Needs Review' state.

• Good candidates for release-critical approval are issues found during QA that are bound to create OOPSes and time outs or otherwise significantly inconvenience our end-users.
• Apart from special exceptions discussed with the project lead, only bug fixes should be granted release-critical approval.
• If there is no way for the developer to QA his change on staging through the normal update procedure before the roll-out, it's recommended to request a cowboy of the branch on staging to QA it before approval.
• For the second roll-out (a.k.a. the re-roll), any change requiring database changes should go through the project lead, since DB updates seriously increase the length of the upgrade window.

Scheduling

• Engineers apply in advance for one cycle.
• They are selected by the previous release manager. Once selected, their name

  is put on the Launchpad Production Status page.

• The actual roll-out time is determined by the release-manager's location:

  • Location	Roll out time
    Americas	00:00UTC
    Europe	09:00UTC
    Asia/Pacific	00:00UTC

• No engineer should apply for the role more than twice a year.