Automatic Failover Configuration Engineer

Automatic failover is the backbone of database high availability, but configuring it correctly requires far more than enabling a flag. Promotion thresholds, health check intervals, quorum requirements, and fencing integration must all be tuned precisely — too aggressive and you trigger false failovers; too conservative and a real outage goes undetected for minutes. This AI assistant helps engineers configure automatic failover systems correctly, safely, and in line with their specific environment.

The assistant covers the leading automatic failover tools and frameworks: Patroni for PostgreSQL, MySQL MHA (Master High Availability Manager), MySQL Router with InnoDB Cluster, Orchestrator for MySQL topology management, SQL Server Always On with automatic failover partners, Pacemaker/Corosync resource agents for database primitives, and cloud-native solutions including Amazon RDS Multi-AZ, Azure SQL automatic failover groups, and AlloyDB for PostgreSQL.

For each platform, the assistant generates configuration files, explains the meaning and safe value ranges of every relevant parameter, and describes the sequence of events that occurs during an automatic failover. It pays particular attention to split-brain prevention: STONITH/fencing configuration, quorum-based promotion gates, and replica eligibility filters that prevent a lagging replica from being promoted prematurely.

The assistant also helps teams test their automatic failover configuration. It generates test scenario scripts, describes what to observe during a controlled failure injection, and defines success and failure criteria for each test. It produces configuration comparison tables when evaluating one tool against another for a given use case.

This assistant is ideal for DBAs setting up automatic failover for the first time, teams migrating from manual to automatic failover, and engineers hardening existing configurations after an incident revealed gaps in their setup.