[Feature flag] Rollout of `main_branch_over_master`
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Work on this issue](https://contributors.gitlab.com/manage-issue?action=work&projectId=278964&issueIid=329190) - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=329190) </details> <!--IssueSummary end--> <!-- Title suggestion: [Feature flag] Enable description of feature --> ## Feature This feature uses the `:main_branch_over_master` feature flag! <!-- Short description of what the feature is about and link to relevant other issues. --> - [Change the default initial branch name for self-managed GitLab instances](https://gitlab.com/gitlab-org/gitlab/-/issues/223789) ## Owners - Team: Create: Source Code Backend - Most appropriate slack channel to reach out to: `#g_create_source-code-be` - Best individual to reach out to: Igor Drozdov or Nick Thomas - PM: Sarah Waldner ## Stakeholders <!-- Are there any other stages or teams involved that need to be kept in the loop? - Name of a PM - The Support Team - The Delivery Team --> ## The Rollout Plan - Partial Rollout on GitLab.com with beta groups - Rollout on GitLab.com for a certain period (How long) - Percentage Rollout on GitLab.com - Rollout Feature for everyone as soon as it's ready <!-- Which dashboards from https://dashboards.gitlab.net are most relevant? Sentry errors reports can also be useful to review --> **Beta Groups/Projects:** <!-- If applicable, any groups/projects that are happy to have this feature turned on early. Some organizations may wish to test big changes they are interested in with a small subset of users ahead of time for example. --> - `gitlab-org/gitlab` project - `gitlab-org`/`gitlab-com` groups - ... ## Expectations ### What are we expecting to happen? <!-- Describe the expected outcome when rolling out this feature --> ### What might happen if this goes wrong? <!-- Should the feature flag be turned off? Any MRs that need to be rolled back? Communication that needs to happen? What are some things you can think of that could go wrong - data loss or broken pages? --> ### What can we monitor to detect problems with this? <!-- Which dashboards from https://dashboards.gitlab.net are most relevant? --> ## Rollout Timeline <!-- Please check which steps are needed and remove those which don't apply --> **Initial Rollout** - [x] Enable on GitLab.com globally - [x] Verify behaviour (See Beta Groups) and add details with screenshots as a comment on this issue - [x] Make the feature flag enabled by default i.e. Change `default_enabled` to `true` - [ ] Cross post chatops slack command to `#support_gitlab-com` ([more guidance when this is necessary in the dev docs](https://docs.gitlab.com/ee/development/feature_flags/controls.html#where-to-run-commands)) and in your team channel **Cleanup** This is an __important__ phase, that should be either done in the next Milestone or as soon as possible. For the cleanup phase, please follow our documentation on how to [clean up the feature flag](https://docs.gitlab.com/ee/development/feature_flags/controls.html#cleaning-up). <!-- The checklist here is to keep track of it's status for stakeholders --> - [ ] Announce on the issue that the flag has been enabled - [ ] Clean up tech debt in the spec suite - the FF is currently explicitly disabled there - [ ] Remove `:feature_name` feature flag - [ ] Remove all references to the feature flag from the codebase - [ ] Remove the YAML definitions for the feature from the repository - [ ] Create a Changelog Entry - [ ] Clean up the feature flag from all environments by running this chatops command in `#production` channel `/chatops run feature delete some_feature`. **Final Step** - [ ] Close this rollout issue for the feature flag after the feature flag is removed from the codebase. ## Rollback Steps - [ ] This feature can be disabled by running the following Chatops command: ``` /chatops run feature set --project=gitlab-org/gitlab feature_name false ```
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