Provision Active-Passive MySQL Cluster Console

Verify Ring 0 & Ring 1 interfaces, /dev/sdb1 disk availability, Chrony clock sync.

Write /etc/drbd.d/mysql-ha.res, initialize metadata, force primary sync, format ext4 MMP.

Dual-ring Totem membership, pcs host authentication, IPMI BMC fence agent arming.

Human-in-the-Loop review of colocation & ordering rules prior to activating VIP & MySQL.

Simulate SysRq kernel crash on Node A, trigger STONITH power cut, promote Node B in <10s.