[Feature flag] Enable and remove sourcegraph feature flag

What

Remove the sourcegraph feature flag ...

Owners

  • Team: ~"group::editor"
  • Most appropriate slack channel to reach out to: #g_create_editor
  • Best individual to reach out to: @pslaughter

Expectations

What are we expecting to happen?

  • Not much for .com.
  • For self-hosted users, they'll have the ability to enable a Sourcegraph integration for their instance.

What might happen if this goes wrong?

  • If this feature flag is removed, we will not be able to disable Sourcegraph other than through the admin settings.

What can we monitor to detect problems with this?

  • Client-side errors are sent to Sentry.

Beta groups/projects

  • gitlab-org/gitlab project
  • gitlab-org/gitlab-com groups
  • sourcegraph group

Roll Out Steps

  • Confirm that QA tests pass with the feature flag enabled (if you're unsure how, contact the relevant stable counterpart in the Quality department)
  • Enable on staging (/chatops run feature set feature_name true --staging)
  • Test on staging
  • Ensure that documentation has been updated
  • Enable on GitLab.com for individual groups/projects listed above and verify behaviour (/chatops run feature set --project=gitlab-org/gitlab feature_name true)
  • Coordinate a time to enable the flag with the SRE oncall and release managers
    • In #production mention @sre-oncall and @release-managers. Once an SRE on call and Release Manager on call confirm, you can proceed with the rollout
  • Announce on the issue an estimated time this will be enabled on GitLab.com
  • Enable on GitLab.com by running chatops command in #production (/chatops run feature set feature_name true)
  • Cross post chatops Slack command to #support_gitlab-com (more guidance when this is necessary in the dev docs) and in your team channel
  • Announce on the issue that the flag has been enabled
  • Remove feature flag and add changelog entry
  • After the flag removal is deployed, clean up the feature flag by running chatops command in #production channel

Rollback Steps

  • This feature can be disabled by running the following Chatops command:
/chatops run feature set --project=gitlab-org/gitlab feature_name false

Availability and Testing

Please coordinate the changes to the feature flag status with a SET so that QA team can monitor for any failures.

Edited by Paul Slaughter