{"id":"rhel9-ha-cluster-requirements","text":"Production HA clusters on RHEL 9 require mandatory STONITH fencing, pcs as the primary management CLI, dedicated firewall ports (TCP 2224/3121, UDP 5405), and Pacemaker-controlled service lifecycle (no systemctl).","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"rhel9-ha-cluster-requirements","truth_value":"IN","reason":"premise"}]}}