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Hi there,<br>
<br>
I actually had the same situation and this thread helped me a lot
with the colocation thing of master slave resources by check
ms:master with ms:master .... anyways I wanted to share my
configuration with all of you guys out there, that are trying to
create a failover system with two drbd resources which should always
stay on the same host. The only thing about my config which doesn't
really work that well, is the order in which the ms resources should
start, maybee someone has an idea how this could be done better,
ms_drbd01 should start before ms_drbd02.....<br>
<br>
don't be confused by the hostnames I actually played arround a bit
with xtreemfs on those hosts before :)<br>
<br>
<br>
<tt>node $id="acf811bd-ccde-43c1-a6d5-99da002203ff" xtreemfs02 \<br>
attributes standby="off"<br>
node $id="caf5e799-4e95-4878-80a9-838705318bf9" xtreemfs01 \<br>
attributes standby="off"<br>
<br>
primitive p_drbd01 ocf:linbit:drbd \<br>
params drbd_resource="r0" \<br>
op start interval="0" timeout="240" \<br>
op stop interval="0" timeout="240" \<br>
op monitor interval="20" role="Master" \<br>
op monitor interval="30" role="Slave"<br>
<br>
primitive p_drbd02 ocf:linbit:drbd \<br>
params drbd_resource="r1" \<br>
op start interval="0" timeout="240" \<br>
op stop interval="0" timeout="240" \<br>
op monitor interval="20" role="Master" \<br>
op monitor interval="30" role="Slave"<br>
<br>
primitive p_fs01 ocf:heartbeat:Filesystem \<br>
params device="/dev/drbd0" fstype="ext2"
directory="/data1" \<br>
op start interval="0" timeout="60" \<br>
op stop interval="0" timeout="60" \<br>
op monitor interval="10" timeout="40"<br>
<br>
primitive p_fs02 ocf:heartbeat:Filesystem \<br>
params device="/dev/drbd1" fstype="ext2"
directory="/data2" \<br>
op start interval="0" timeout="60" \<br>
op stop interval="0" timeout="60" \<br>
op monitor interval="10" timeout="40"<br>
<br>
primitive p_ip ocf:heartbeat:IPaddr2 \<br>
params ip="10.90.91.60" nic="eth0" cidr_netmask="24"
broadcast="10.90.91.255" \<br>
op start interval="0" timeout="30" \<br>
op stop interval="0" timeout="40" \<br>
op monitor interval="10" timeout="20"<br>
<br>
group cluster p_ip p_fs01 p_fs02 \<br>
meta target-role="Started"<br>
<br>
ms ms_drbd01 p_drbd01 \<br>
meta notify="true"<br>
ms ms_drbd02 p_drbd02 \<br>
meta notify="true"<br>
<br>
colocation cluster_with_drbdmaster inf: cluster ms_drbd01:Master<br>
colocation drbd01_with_drbd02 inf: ms_drbd01:Master
ms_drbd02:Master<br>
order drbd01_before_drbd02 inf: ms_drbd02:promote ms_drbd01:start<br>
order drbd_before_cluster inf: ms_drbd01:promote cluster:start<br>
order fs01_before_fs02 inf: p_fs01:start p_fs02:start<br>
<br>
property $id="cib-bootstrap-options" \<br>
dc-version="1.0.8-042548a451fce8400660f6031f4da6f0223dd5dd" \<br>
cluster-infrastructure="Heartbeat" \<br>
no-quorum-policy="ignore" \<br>
stonith-enabled="false" \<br>
last-lrm-refresh="1317807669"<br>
</tt><br>
<br>
Hope this is helping someone out there.....<br>
<br>
<br>
On 02/23/2011 03:10 PM, Dejan Muhamedagic wrote:
<blockquote cite="mid:20110223141054.GA3506@squib" type="cite">
<pre wrap="">Hi,
On Mon, Feb 21, 2011 at 05:44:34PM +0000, Brett Delle Grazie wrote:
</pre>
<blockquote type="cite">
<pre wrap="">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=<a class="moz-txt-link-rfc2396E" href="http://localhost/manager/serverinfo">"http://localhost/manager/serverinfo"</a>
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
</pre>
</blockquote>
<pre wrap="">
You'd want to add $role=Master in these two. You could also
collocate them:
colocation two_drbd inf: ms_drbd_A:Master ms_drbd_B:Master
</pre>
<blockquote type="cite">
<pre wrap="">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
</pre>
</blockquote>
<pre wrap="">
The order for _B missing?
</pre>
<blockquote type="cite">
<pre wrap="">Is there a better way to configure this?
</pre>
</blockquote>
<pre wrap="">
Otherwise, it seems fine to me.
One alternative is to put the two drbd resources in a group then
make a m/s resource of that group:
group drbd_AB drbd_A drbd_B
ms ms_drbd drbd_AB
colocation tomcat_on_drbd inf: grp_1 ms_drbd:Master
order tomcat_after_drbd inf: ms_drbd:promote grp_1
But in that case the two drbd will start sequentially.
Thanks,
Dejan
</pre>
<blockquote type="cite">
<pre wrap="">Thanks for any help /pointers.
--
Best Regards,
Brett Delle Grazie
_______________________________________________
Pacemaker mailing list: <a class="moz-txt-link-abbreviated" href="mailto:Pacemaker@oss.clusterlabs.org">Pacemaker@oss.clusterlabs.org</a>
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Project Home: <a class="moz-txt-link-freetext" href="http://www.clusterlabs.org">http://www.clusterlabs.org</a>
Getting started: <a class="moz-txt-link-freetext" href="http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf">http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf</a>
Bugs: <a class="moz-txt-link-freetext" href="http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker">http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker</a>
</pre>
</blockquote>
<pre wrap="">
_______________________________________________
Pacemaker mailing list: <a class="moz-txt-link-abbreviated" href="mailto:Pacemaker@oss.clusterlabs.org">Pacemaker@oss.clusterlabs.org</a>
<a class="moz-txt-link-freetext" href="http://oss.clusterlabs.org/mailman/listinfo/pacemaker">http://oss.clusterlabs.org/mailman/listinfo/pacemaker</a>
Project Home: <a class="moz-txt-link-freetext" href="http://www.clusterlabs.org">http://www.clusterlabs.org</a>
Getting started: <a class="moz-txt-link-freetext" href="http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf">http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf</a>
Bugs: <a class="moz-txt-link-freetext" href="http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker">http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker</a>
</pre>
</blockquote>
<br>
<br>
<div class="moz-signature">-- <br>
<p style="font: 12px verdana;">
Best Regards,<br>
Frank Lazzarini
</p>
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src="cid:part1.01070607.00030209@googlemail.com" border="0"></a><br>
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