Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 4.5 Manuale Utente Scaricare il pdf (Pagina 68)

Dell HPC NFS Storage Solution High Availability Configurations with Large Capacities

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.

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Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 4.5 Manuale Utente Pagina 68