High Availability PostgreSQL 16.11 Cluster with repmgr 5.5 on CentOS Stream 10 (Coughlan)

Introduction High availability (HA) is a critical requirement for modern database infrastructures, ensuring minimal downtime and seamless failover in case of node failures. PostgreSQL, while robust as a standalone database, requires additional tooling to manage replication, failover, and cluster orchestration in multi‑node environments. repmgr (Replication Manager) is a widely adopted open‑source tool that simplifies the…