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Dell HPC NFS Storage Solution High Availability Configurations with Large Capacities
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A.8. Quick test of HA setup
1. Test fencing:
o First disable the cluster service:
[root@active ~]# clusvcadm –d HA1
o From the active server run the command fence_node passive. This should power cycle the
passive server via DRAC. Check /var/log/messages on active.
o From passive run the command fence_node active. This should power cycle the active
server via iDRAC. Check /var/log/messages on passive.
o Disconnect the DRAC cable on passive. From “active” run the command fence_node passive.
This should power cycle the passive server via the switched PDU.
o Disconnect the DRAC cable on active. From passive run the command fence_node active.
This should power cycle the “active” server via the switched PDU.
2. Simple HA failover test:
o Start the service on the “active” server:
[root@active ~]# clusvcadm –e HA1 –m active
o Power down the active server by holding down the power button or by pulling out both power
cords.
o Service should migrate to passive. Watch /var/log/messages and check clustat status on
passive.