Deploying MySQL Primary–Replica Replication on Ubuntu 24.04 (On-Premises Guide)
Setting up MySQL replication (Primary → Replica) on Ubuntu 24.04 is a solid strategy for improving high availability, redundancy, backup readiness, and read scalability in on-premises environments. This guide walks through a production-oriented setup of MySQL replication, along with practical DBA considerations and a custom diagnostic script for monitoring replication health. Architecture Overview Our replication topology follows a standard Primary → Replica architecture: • Primary (Master): Handles write operations • Replica (Slave): Read-only node that continuously replicates from the primary Components Configured: • Binary logging on Primary • Unique server IDs • Dedicated replication user • Initial data synchronization • SSL-secured replication transport • Replica read-only enforcement Prerequisites: Configure SCP/SSH Access Between Nodes Before beginning replication setup, ensure secure file transfer is configured between both servers. Recommended: SSH Key Authentication On Source...
