AIX QHA

The standard tool for cluster monitoring is clstat, which comes along with PowerHA SystemMirror/HACMP. Clstat is rather slow with its updates, and sometimes the required clinfo deamon needs restarting in order to get it operational, so this is, well, not perfect. There's a script which is also easy to use. It is written by PowerHA/HACMP guru Alex Abderrazag. This script shows you the correct PowerHA/HACMP status, along with adapter and volume group information. It works fine on HACMP 5.2 through 7.2. You can download it here: qha. This is version 9.06. For the latest version, check www.lpar.co.uk.

This tiny but effective tool accepts the following flags:

  •   -n (show network interface info)
  •   -N (show interface info and active HBOD)
  •   -v (show shared online volume group info)
  •   -l (log to /tmp/qha.out)
  •   -e (show running events if cluster is unstable)
  •   -m (show status of monitor app servers if present)
  •   -1 (exit after first iteration)
  •   -c (CAA SAN / Disk Comms)
For example, run:
# qha -nev
It's useful to put "qha" in /usr/es/sbin/cluster/utilities, as that path is usually already defined in $PATH, and thus you can run qha from anywhere.

A description of the possible cluster states:
  • ST_INIT: cluster configured and down
  • ST_JOINING: node joining the cluster
  • ST_VOTING: Inter-node decision state for an event
  • ST_RP_RUNNING: cluster running recovery program
  • ST_BARRIER: clstrmgr waiting at the barrier statement
  • ST_CBARRIER: clstrmgr is exiting recovery program
  • ST_UNSTABLE: cluster unstable
  • NOT_CONFIGURED: HA installed but not configured
  • RP_FAILED: event script failed
  • ST_STABLE: cluster services are running with managed resources (stable cluster) or cluster services have been "forced" down with resource groups potentially in the UNMANAGED state (HACMP 5.4 only)

 

Topics: Monitoring, PowerHA / HACMP

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