[Pacemaker] how does the exportfs resource agent work?

[emmanuel segura]

I think man nfs it's can help you

Try to look your nfs client options

2012/1/15 Dennis Jacobfeuerborn <dennisml at conversis.de>

> Hi,
> I'm trying to build a HA nfs system based on drbd and apart from the nfs
> export everything is working fine. The problem is that when I force a
> failover things seem to work fine yet when I fail back to the original
> system the clients freeze for a very long time.
>
> /mnt/tmp is the mountpoint on the client and I'm using the following to
> test access:
> for i in `seq 1 2000`; do echo $i; ls /mnt/tmp; sleep 1; done
>
> on a failover the output look like this:
>
> ...
> 47
> testfile  testfile2
> 48
> testfile  testfile2
> 49
> testfile  testfile2
> 50
> testfile  testfile2
> 51
> testfile  testfile2
> 52
> ls: cannot open directory /mnt/tmp: Permission denied
> 53
> ls: cannot open directory /mnt/tmp: Permission denied
> 54
> <<< freeze of several minutes >>>
> testfile  testfile2
> 55
> testfile  testfile2
> 56
> testfile  testfile2
> ...
>
> The first question I have is how can I prevent the "Permission denied"
> errors? If these occur on e.g. a mountpoint for MySQL for example this will
> no doubt lead to problems with the database and that means the storage
> isn't really redundant.
>
> The second question is how do I reduce the failover time? I tried adding
> timeo=30 to the client mount options but that doesn't seem to help.
>
> This is what my cib looks like:
>
> node storage1.dev
> node storage2.dev
> primitive p_drbd_nfs ocf:linbit:drbd \
>        params drbd_resource="nfs" \
>        op monitor interval="15" role="Master" \
>        op monitor interval="30" role="Slave"
> primitive p_exportfs_data ocf:heartbeat:exportfs \
>        params fsid="1" directory="/mnt/data/export"
> options="rw,no_root_squash" clientspec="*" \
>        op monitor interval="30s"
> primitive p_fs_data ocf:heartbeat:Filesystem \
>        params device="/dev/drbd/by-res/nfs" directory="/mnt/data"
> fstype="ext3" \
>        op monitor interval="10s"
> primitive p_ip_nfs ocf:heartbeat:IPaddr2 \
>        params ip="192.168.2.190" cidr_netmask="24" \
>        op monitor interval="30s"
> group g_nfs p_fs_data p_exportfs_data p_ip_nfs
> ms ms_drbd_nfs p_drbd_nfs \
>        meta master-max="1" master-node-max="1" clone-max="2"
> clone-node-max="1" notify="true"
> colocation c_nfs_on_drbd inf: g_nfs ms_drbd_nfs:Master
> order o_drbd_before_nfs inf: ms_drbd_nfs:promote g_nfs:start
> property $id="cib-bootstrap-options" \
>        dc-version="1.0.12-unknown" \
>        cluster-infrastructure="**openais" \
>        expected-quorum-votes="2" \
>        stonith-enabled="false" \
>        no-quorum-policy="ignore"
> rsc_defaults $id="rsc-options" \
>        resource-stickiness="200"
>
> Regards,
>  Dennis
>
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