I've been having a problem with the lvm ra when used in conjunction with clvm
when a node dies (eg when I destroy the vm to test this particular scenario)
clvm re-organises itself just fine, and comes good well within the lvm ra
timeout I set (60 seconds), but if the "vgdisplay -v vg-drbd" command is
executed by the lvm ra monitor op while clvm is learning that the node is
dropped it hangs forever and the ra monitor times out.
I worked around this by doing this in the monitor of the ra:
rc=124
limit=10
while [ $limit -ge 0 -a $rc -eq 124 ]
do
limit=`expr $limit - 1`
timeout --kill-after=5s 5s vgdisplay -v $1 2>&1 | grep -i
'Status[ \t]*available' 2>&1 >/dev/null
rc=$?
done
return $rc
which kills the hung vgdisplay if it goes more than 5 seconds (should never)
and retries the operation a few times, and seems to work. Now I can kill a node
without the cluster falling to pieces and going on a stonith frenzy (actually
it sometimes still does, but not for that reason)
Maybe someone will find this useful? Or tell me a better way to do it (other
than fix the bug in vgdisplay :)?
Thanks
James
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