페일오버가 안전하지 않을 때: Kubernetes 기반 고가용성 PostgreSQL 구축

This article reveals why traditional Kubernetes PostgreSQL deployments can fail to recover safely during network partitions, where replication lag prevents secure failovers. By combining synchronous replication with the Patroni orchestrator, the solution ensures data durability without sacrificing availability—a critical balance that chaos engineering uncovered as essential for production reliability. This practical approach addresses a fundamental challenge in cloud-native database architecture that many organizations only discover during real failures.