[Pacemaker] Multiple DRBD resources how best to configure resources on top.
Brett Delle Grazie
brett.dellegrazie at gmail.com
Mon Feb 21 17:45:49 UTC 2011
Forgot to add:
RHEL 5.6, pacemaker 1.0.10, drbd 8.3.10, kernel 2.6.18-238.1.1.el5
On 21 February 2011 17:44, Brett Delle Grazie
<brett.dellegrazie at gmail.com> wrote:
> Hi,
>
> If I have two DRBD resources:
> resourceA
> resourceB
>
> What's the best way to configure the constraints in pacemaker so that
> a tomcat resource, which serves both of them when mounted,
> will not be started unless they are both present? My current
> configuration (below) fails to migrate correctly when drbd_B fails due
> to network glitch
> and tomcat fails to stop. In this case, the demote on drbd_B fails
> because the directory is still mounted and I end up with a split brain
> scenario. Basically I want to force drbd_A and drbd_B to be master on
> the same system.
>
> Currently I have:
> node nodeA
> node nodeB
>
> primitive drbd_A ocf:linbit:drbd \
> params drbd_resource="A" \
> op start interval="0" timeout="240" \
> op stop interval="0" timeout="100" \
> op monitor interval="30"
> primitive drbd_B ocf:linbit:drbd \
> params drbd_resource="B" \
> op start interval="0" timeout="240" \
> op stop interval="0" timeout="100" \
> op monitor interval="30"
>
> primitive fs_A ocf:heartbeat:Filesystem \
> params device="/dev/drbd/by-res/A" directory="/mnt/A"
> fstype="ext3" options="defaults,noatime" \
> op start interval="0" timeout="60" \
> op stop interval="0" timeout="60" \
> op monitor interval="60" timeout="40" depth="0"
> primitive fs_B ocf:heartbeat:Filesystem \
> params device="/dev/drbd/by-res/B" directory="/mnt/B"
> fstype="ext3" options="defaults,noatime" \
> op start interval="0" timeout="60" \
> op stop interval="0" timeout="60" \
> op monitor interval="60" timeout="40" depth="0"
>
> primitive tomcat_tc1 ocf:heartbeat:tomcat \
> params tomcat_user="tomcat" catalina_home="/opt/tomcat6"
> catalina_base="/home/tomcat/tc1"
> catalina_pid="/home/tomcat/tc1/temp/tomcat.pid"
> catalina_rotate_log="NO" script_log="/home/tomcat/tc1/logs/tc1.log"
> statusurl="http://localhost/manager/serverinfo"
> java_home="/usr/lib/jvm/java" \
> op start interval="0" timeout="60" \
> op stop interval="0" timeout="20" \
> op monitor interval="60" timeout="30" start-delay="60"
> primitive vip_1 ocf:heartbeat:IPaddr2 \
> params ip="10.xx,xx,xx" nic="bond0" iflabel="3" \
> op monitor interval="10" timeout="20"
> group grp_1 fs_A fs_B vip_1 tomcat_tc1
>
> ms ms_drbd_A drbd_A \
> meta master-max="1" master-node-max="1" clone-max="2"
> clone-node-max="1" notify="true"
> ms ms_drbd_B drbd_B \
> meta master-max="1" master-node-max="1" clone-max="2"
> clone-node-max="1" notify="true"
>
> location loc_ms_drbd_A ms_drbd_A 100: nodeA
> location loc_ms_drbd_B ms_drbd_B 100: nodeA
>
> colocation A_on_drbdA inf: grp_1 ms_drbd_A:Master
> colocation B_on_drbdB inf: grp_1 ms_drbd_B:Master
>
> order A_after_drbdA inf: ms_drbd_A:promote grp_1:start
>
> Is there a better way to configure this?
>
> Thanks for any help /pointers.
>
> --
> Best Regards,
>
> Brett Delle Grazie
>
--
Best Regards,
Brett Delle Grazie
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