[Pacemaker] Configuring ocf:heartbeat:Filesystem monitoring

[emmanuel segura]

vim /usr/lib/ocf/resource.d/heartbeat/Filesystem
===========================================
<longdesc lang="en">
Resource script for Filesystem. It manages a Filesystem on a
shared storage medium.

The standard monitor operation of depth 0 (also known as probe)
checks if the filesystem is mounted. If you want deeper tests,
set OCF_CHECK_LEVEL to one of the following values:

10: read first 16 blocks of the device (raw read)

This doesn't exercise the filesystem at all, but the device on
which the filesystem lives. This is noop for non-block devices
such as NFS, SMBFS, or bind mounts.

20: test if a status file can be written and read

The status file must be writable by root. This is not always the
case with an NFS mount, as NFS exports usually have the
"root_squash" option set. In such a setup, you must either use
read-only monitoring (depth=10), export with "no_root_squash" on
your NFS server, or grant world write permissions on the
directory where the status file is to be placed.
</longdesc>
<shortdesc lang="en">Manages filesystem mounts</shortdesc>
=======================================================

Il giorno 11 aprile 2012 15:22, Terry Johnson
<terry.johnson at scribendi.com>ha scritto:

> Hi –****
>
> ** **
>
> I’m working on a two node cluster on CentOS 6.2, using iscsi shared
> storage, and I’m having difficulty detecting a lost connection to the
> storage.****
>
> ** **
>
> Maybe this is a n00b issue, but I understand that monitor depth="20" in
> ocf:heartbeat:Filesystem is supposed to create a test file and check
> whether it can write to that file, and declare the resource failed if the
> filesystem goes read-only. The test file does not get created, and I can’t
> see where any errors might be being logged to. ****
>
> ** **
>
> I’ve tested this configuration by disabling a switch port. The second node
> picks up the services correctly, but the first node keeps on running them
> too, and does not notice that it no longer has a writeable filesystem.  If
> the port is reconnected, they both have the same ext3 filesystem mounted at
> once, which makes a fine mess.****
>
> ** **
>
> Here’s my current configuration. Have I missed some vital detail?  Should
> I be brining the iscsi connection into pacemaker too?****
>
> ** **
>
> node dba****
>
> node dbb****
>
> primitive ClusterIP ocf:heartbeat:IPaddr2 \****
>
>         params ip="10.232.169.130" cidr_netmask="24" \****
>
>         op monitor interval="30s" nic="eth0" \****
>
>         meta target-role="Started"****
>
> primitive p_fs_mysql ocf:heartbeat:Filesystem \****
>
>         params device="/dev/sdb1" directory="/mnt/mysql" fstype="ext3"
> options="noatime,nodiratime,noexec" \****
>
>         op start interval="0" timeout="60" \****
>
>         op stop interval="0" timeout="240" \****
>
>         op monitor interval="30s" depth="20" \****
>
>         meta target-role="Started"****
>
> primitive p_mysql lsb:mysql \****
>
>         op start interval="0" timeout="60s" \****
>
>         op stop interval="0" timeout="60s" \****
>
>         op monitor interval="15s" \****
>
>         meta target-role="Started"****
>
> group g_mysql p_fs_mysql ClusterIP p_mysql \****
>
>         meta target-role="Started"****
>
> property $id="cib-bootstrap-options" \****
>
>         dc-version="1.1.6-3.el6-a02c0f19a00c1eb2527ad38f146ebc0834814558" \
> ****
>
>         cluster-infrastructure="openais" \****
>
>         expected-quorum-votes="2" \****
>
>         stonith-enabled="false" \****
>
>         no-quorum-policy="ignore"****
>
> rsc_defaults $id="rsc-options" \****
>
>         resource-stickiness="200"****
>
> ** **
>
> corosync (1.4.1-4.el6_2.1) ****
>
> pacemaker (1.1.6-3.el6) ****
>
> ** **
>
> Any suggestions are appreciated.****
>
> ** **
>
> Terry.****
>
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>
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-- 
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