The daily full PostgreSQL backup silently skipped its 2026-06-13 00:00 run, leaving the last full dump 37h old and firing the critical PostgreSQLBackupStale alert. Root cause: startingDeadlineSeconds was 10s on all four dbaas backup CronJobs, so when the CronJob controller was more than 10s late to the midnight tick (many IO-heavy backups all fire at 00:00, the known etcd-starvation window) the run was dropped entirely instead of starting late. 600s lets a brief controller lag still launch the job. Applied to all four (mysql + pg, full + per-db) since they share the footgun and the midnight contention.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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