Hi 

Another purpose to set the start/stop of nfsserver in Pacemaker is to be 
able to monitor the nfs services periodically
and take automatically the failover decision/actions in case of problem on 
the nfs services (failover of exportfs, failover of 
virtual IP, etc.)

About lock migration, as far as I know and try, there is no possibility to 
manage nfs locks
migration with v3 clients, my conclusion after experiencing a few months 
ago was that
lock migration can't be managed in a HA NFS active/active configuration 
(meaning with a nfs server on each node) , 
but only in a active/passive configuration, or perhaps with exclusively 
NFS v4 clients ? 
(but I have not yet tried this exclusively v4 configuration)
But perhaps somebody has other experiences and conclusions about HA NFS 
... ?

Regards
Alain 



De :    "Ulrich Windl" <[email protected]>
A :     "General Linux-HA mailing list" <[email protected]>
Date :  17/04/2012 08:46
Objet : [Linux-HA] Antw: Re:  problem with nfs and exportfs failover
Envoyé par :    [email protected]



>>> William Seligman <[email protected]> schrieb am 16.04.2012 
um 18:49
in Nachricht <[email protected]>:

[...]
> - There's a more fundamental question: Why are you placing the 
start/stop of
> your NFS server on both nodes under pacemaker control? Why not have the 
NFS
> server start at system startup on each node?
[...]

Hi!

First I think nfsserver starts up and stops quite fast, and secondly I 
feel worried about lock migration if you move around exports from one 
server to the other. (MHO)

Regards,
Ulrich


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