[ClusterLabs] Fencing with a 3-node (1 for quorum only) cluster

Digimer lists at alteeve.ca
Sat Aug 6 19:46:03 EDT 2016

On 06/08/16 07:33 PM, Dan Swartzendruber wrote:
> Okay, I almost have this all working.  fence_ipmilan for the supermicro
> host.  Had to specify lanplus for it to work.  fence_drac5 for the R905.
>  That was failing to complete due to timeout.  Found a couple of helpful
> posts that recommended increase the retry count to 3 and the timeout to
> 60.  That worked also.  The only problem now, is that it takes well over
> a minute to complete the fencing operation.  In that interim, the fenced
> host shows as UNCLEAN (offline), and because the fencing operation
> hasn't completed, the other node has to wait to import the pool and
> share out the filesystem.  This causes the vsphere hosts to declare the
> NFS datastore down.  I hadn't gotten exact timing, but I think the
> fencing operation took a little over a minute.  I'm wondering if I could
> change the timeout to a smaller value, but increase the retries?  Like
> back to the default 20 second timeout, but change retries from 1 to 5?

Did you try the fence_ipmilan against the DRAC? It *should* work. Would
be interesting to see if it had the same issue. Can you check the DRAC's
host's power state using ipmitool directly without delay?

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