Document active_runners as a Sidekiq metric
What does this MR do and why?
Document active_runners as a Sidekiq metric
This Prometheus metric was documented as a regular metric, but it is exported by Sidekiq and it needs more setup to be available.
- defined at: https://gitlab.com/gitlab-org/gitlab/-/blob/1ab9d4233645b496fcd714de76d986c07455da1f/lib/gitlab/ci/queue/metrics.rb#L223-232
- intermediary step: https://gitlab.com/gitlab-org/gitlab/-/blob/1ab9d4233645b496fcd714de76d986c07455da1f/lib/gitlab/ci/queue/metrics.rb#L122-126
- intermediary step: https://gitlab.com/gitlab-org/gitlab/-/blob/1ab9d4233645b496fcd714de76d986c07455da1f/app/services/ci/update_build_queue_service.rb#L104
- called from Sidekiq: https://gitlab.com/gitlab-org/gitlab/-/blob/1ab9d4233645b496fcd714de76d986c07455da1f/app/workers/build_queue_worker.rb#L17
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Edited by Marius Bobin