Alerts

• Alerting

  The controller's Kubernetes Events on StageSet transitions, the opt-in PrometheusRule alert catalog with tunable thresholds, and how every alert and Ready reason links to a runbook.

• Controller pod down

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

• Observability

  The four observability pillars for the controller — structured logging, OTLP tracing, Prometheus metrics, and the opt-in alert catalog — plus service level objectives and a ready-made dashboard.

• Operations

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

• Reconcile latency high

  Reconcile p99 latency for the StageSet controller is above threshold.

• Service level objectives

  The StageSet controller's SLOs — reconcile availability and reconcile latency — with their SLIs, targets, error budget, the dashboard that shows them, and how to tune them.

• Workqueue saturation

  The controller cannot drain its reconcile queue fast enough.