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 <denni...@conversis.de <mailto:denni...@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 _________________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org <mailto:Pacemaker@oss.clusterlabs.org> http://oss.clusterlabs.org/__mailman/listinfo/pacemaker <http://oss.clusterlabs.org/mailman/listinfo/pacemaker> Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/__doc/Cluster_from_Scratch.pdf <http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf> Bugs: http://bugs.clusterlabs.org -- esta es mi vida e me la vivo hasta que dios quiera _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
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