Pacemaker HA Agent v2 is a tech preview release for SQL Server 2025 CU3+ on RHEL 9+, delivering faster and more reliable failovers. Key improvements over v1 include a service-based architecture (mssql-pcsag), richer health diagnostics via sp_Server_diagnostics, configurable failure condition levels and health check timeouts, improved write-lease integration to prevent split-brain scenarios, and TLS 1.3 support. The upgrade path involves removing the existing AG resource and recreating it with the new ocf:mssql:agv2 agent.
Table of contents
Why Pacemaker matters on RHELWhat needed improvement?Enter Pacemaker HA Agent v2BenefitsWhere can you run it?Wrap up889 Impressions