[Pacemaker] Failing back a multi-state resource eg. DRBD

[David McCurley]

Are you wanting to move all the resources back or just that one resource?

I'm still learning, but one simple way I move all resources back from nodeb to nodea is like this:

# on nodeb
sudo crm node standby
# now services migrate to nodea
# still on nodeb
sudo crm node online

This may be a naive way to do it but it works for now :)

There is also a "crm resource migrate" to migrate individual resources.  For that, see here:

http://www.clusterlabs.org/doc/crm_cli.html


----- Original Message -----
> From: "Dominic Malolepszy" <dmalolepszy at optusnet.com.au>
> To: pacemaker at oss.clusterlabs.org
> Sent: Thursday, March 3, 2011 12:18:51 AM
> Subject: [Pacemaker] Failing back a multi-state resource eg. DRBD
> Hi,
> 
> I'm trying to simulate various scenarios and what to do to correct the
> problem. I have a DRBD cluster as defined below; if the primary fails
> (ie power cycled drbd01.test), the secondary (drbd02.test) takes over
> successfully, so DRBD:master now runs on drbd02.test. When node
> drbd01.test comes back up, DRBD:master remains on drbd02.st (ie due to
> resource stickness); and drbd01.test simply becomes DRBD:Slave; this
> is what I want.
> 
> Now what command/s would I need to run to move the master back to
> drbd01.test, and make drbd02.test the new slave? The name of the
> multi-state resource is ms-drbd0, below is the config I am currently
> running.
> 
> 
> node drbd01.test \
> attributes standby="off"
> node drbd02.test \
> attributes standby="off"
> primitive drbd0 ocf:linbit:drbd \
> params drbd_resource="drbd0" \
> op monitor interval="60s" \
> op start interval="0" timeout="240s" \
> op promote interval="0" timeout="90s" start-delay="3s" \
> op demote interval="0" timeout="90s" start-delay="3s" \
> op notify interval="0" timeout="90s" \
> op stop interval="0" timeout="100s" \
> op monitor interval="10s" role="Master" timeout="20s" start-delay="5s"
> \
> op monitor interval="20s" role="Slave" timeout="20s" start-delay="5s"
> primitive fs0 ocf:heartbeat:Filesystem \
> params directory="/var/lib/pgsql/9.0/data" device="/dev/drbd0"
> fstype="ext3" \
> op start interval="0" timeout="60s" start-delay="1s" \
> op stop interval="0"
> primitive ip ocf:heartbeat:IPaddr \
> params ip="192.168.1.50" cidr_netmask="24" \
> op monitor interval="10s"
> primitive pgsql0 ocf:heartbeat:pgsql \
> params pgctl="/usr/pgsql-9.0/bin/pg_ctl" \
> params psql="/usr/pgsql-9.0/bin/psql" \
> params pgdata="/var/lib/pgsql/9.0/data" \
> op monitor interval="30s" timeout="30s" \
> op start interval="0" timeout="120s" start_delay="1s" \
> op stop interval="0" timeout="120s"
> primitive ping_gateway ocf:pacemaker:ping \
> params host_list="192.168.1.1" multiplier="1000" \
> op monitor interval="10s" timeout="60s" \
> op start interval="0" timeout="60s" \
> op stop interval="0" timeout="20s"
> ms ms-drbd0 drbd0 \
> meta master-max="1" master-node-max="1" notify="true"
> clone-node-max="1" clone-max="2"
> clone connectivity_check ping_gateway \
> meta globally-unique="false"
> location master-connected-node ms-drbd0 \
> rule $id="master-connected-node-rule" $role="master" -inf: not_defined
> pingd or pingd lte 0
> location primary_location ip 50: drbd01.test
> colocation fs0-with-drbd0 inf: fs0 ms-drbd0:Master
> colocation ip-with-pgsql0 inf: ip pgsql0
> colocation pgsql0-with-fs0 inf: pgsql0 fs0
> order fs0-after-drbd0 inf: ms-drbd0:promote fs0:start
> order ip-after-pgsql0 inf: pgsql0 ip
> order pgsql0-after-fs0 inf: fs0:start pgsql0
> property $id="cib-bootstrap-options" \
> cluster-infrastructure="openais" \
> expected-quorum-votes="2" \
> stonith-enabled="false" \
> no-quorum-policy="ignore" \
> dc-version="1.0.10-da7075976b5ff0bee71074385f8fd02f296ec8a3"
> rsc_defaults $id="rsc-options" \
> resource-stickiness="100"
> 
> 
> Cheers,
> Dominic.
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