Cluster fencing 101: why it prevents split-brain
Last updated: 20 Aug 2025 Definition: Fencing is how a cluster forcibly removes a failed/partitioned node to protect data. No fencing, no integrity. Types Power fencing (IPMI/iDRAC/iLO, PDUs): power-off the node. Fabric fencing (SAN switch, SBD): cut disk or path access. Minimal Pacemaker baseline # Enable fencing crm configure property stonith-enabled=true # Example IPMI fence … Read more