[Pacemaker] how does the exportfs resource agent work?

[Dennis Jacobfeuerborn]

What am I supposed to look for?

Regards,
   Dennis

On 01/16/2012 12:13 PM, emmanuel segura wrote:
> 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
> <mailto: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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>
>
> --
> esta es mi vida e me la vivo hasta que dios quiera
>
>
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