KeepaliveD
Configure Keepalived for high availability on Linux using VRRP and health checks, covering installation, MASTER/BACKUP setup, priorities, IPv6/VRRPv3, notification scripts, and diagnostics.
High-Availability
PostgreSQL
Setup and operation of a Patroni-managed PostgreSQL 17 cluster with etcd consensus and PgBouncer connection pooling, covering SSL, performance tuning, WAL archiving, PITR, and logical replication.