[ClusterLabs] NFS Failover - client hangs

[Marco Marino]

Following the solution proposed by red hat I noted that the resource agent
cannot manage NFSD_V4_LEASE and NFSD_V4_GRACE options in
/etc/sysconfig/nfs.
However, i manually changed the script
in /usr/lib/ocf/resource.d/heartbeat/nfsserver on both nodes, but there is
the same problem. How can i check if nfs "understand" this parameters?
Should i reduce some timeout in the exportfs resources or nfsserver
resource?

Thanks,
MM

2015-06-22 11:12 GMT+02:00 Michael Schwartzkopff <ms at sys4.de>:

> Am Montag, 22. Juni 2015, 10:51:16 schrieb Marco Marino:
> > Hi,
> > I'm building an nfs server with drbd and pacemaker on CentOS 6.5 and i
> have
> > some questions related to the failover. In my installation after a
> > simulated failover, clients hangs for a random time (between few seconds
> > and 140 seconds) before commands like "ls" or "touch" became responsive.
> > This happens also if I use nfsvers=3 on clients. Why this happens? How
> can
> > manage this case for reduce this time?
> > Following the guide on the linbit site ("Nfs on rhel 6") on chapter 11
> > there are some failover tests and it should works without this kind of
> > problems.
> >
> > Thanks,
> > MM
>
> Looks like your server waits for the lease / grace timeout. Please see:
>
> https://access.redhat.com/solutions/42868
>
> or goole for "nfsv4 lease timeout"
>
> The options grace / least timeout can be configured as agent parameters.
> Lower
> it according to your needs.
>
> Mit freundlichen Grüßen,
>
> Michael Schwartzkopff
>
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