按工作负载查找 Kubernetes 重启情况

SELECT
  cluster,
  namespace,
  workload,
  COUNT(*) AS observations,
  SUM(CASE WHEN event_name = 'container_restarted' THEN 1 ELSE 0 END) AS restart_events,
  MAX(restart_count) AS max_restart_count,
  SUM(CASE WHEN ready THEN 0 ELSE 1 END) AS not_ready_observations,
  100.0 * SUM(CASE WHEN ready THEN 0 ELSE 1 END)
    / NULLIF(COUNT(*), 0) AS not_ready_rate_pct
FROM kubernetes_workload_events
WHERE timestamp_utc >= now() - INTERVAL '24 hours'
  AND environment = 'production'
GROUP BY cluster, namespace, workload
ORDER BY restart_events DESC, not_ready_rate_pct DESC, workload;