Runbooks

• ArtifactNotFound

  The referenced ExternalArtifact could not be found (transient; the controller requeues).

• Controller pod down

  A stageset-controller pod has been NotReady for the alert window.

• DependencyNotReady

  A StageSet named in spec.dependsOn is not yet Ready.

• DowngradeRequiresMigration

  The desired version is below the deployed version and a migration boundary blocks the downgrade.

• InvalidSpec

  The StageSet spec is invalid; the Message names the offending field or action.

• InvalidVersion

  A version source or value could not be parsed as semver.

• Operations

  Metrics, alerts, events, and runbooks for running the controller day to day.

• PreviousRevisionUnavailable

  rollbackOnFailure is set but the last-good revisions could not be restored.

• Reconcile latency high

  Reconcile p99 latency for the StageSet controller is above threshold.

• ResolveFailed

  A source reference could not be resolved to a ready ExternalArtifact.

• SourceNotReady

  The source exists but has not published a ready artifact yet (transient).

• StageFailed

  A stage failed to fetch, build, apply, verify, or run an action; the run halts there.

• Stalled

  The run cannot make progress and will not retry until the spec changes.

• Succeeded

  All stages applied and verified the healthy steady state.

• Suspended

  Reconciliation is paused via spec.suspend.

• UpdateDeferred

  A new revision is held by a closed update window.

• Webhook cert renewal failing

  The self-signed admission webhook certificate is not being rotated.

• Workqueue saturation

  The controller cannot drain its reconcile queue fast enough.