Technology: postgresql

Detects high-severity failures in self-hosted PostgreSQL high-availability clusters managed by Patroni, Zalando, or similar HA controllers.This rule targets catastrophic conditions that break replication or cluster consensus:

• WAL streaming failures due to missing replication slots (usually after disk full or crash events)
• Persistent errors resolving HA controller endpoints (etcd/consul) and loss of HA controller quorum
• Disk saturation leading to WAL write errors and replication breakage

PostgreSQL logs an error when it cannot extend a data file (table/index) becausethe filesystem is out of disk space. This prevents writes requiring new allocation.

Detects catastrophic SpiceDB database corruption where critical core tables like `alembic_version` and `relation_tuple_transaction` are missing or dropped.This represents complete database corruption that renders SpiceDB unable to perform any authorization operations, causing total permission system failure.