[Pacemaker] drbd / libvirt / Pacemaker Cluster?

[emmanuel segura]

And you need to configure your cluster fencing and you need to be sure
sure to configure drbd to use the pacemaker fencing
http://www.drbd.org/users-guide/s-pacemaker-fencing.html

2014-11-13 14:58 GMT+01:00 Dejan Muhamedagic <dejanmm at fastmail.fm>:
> Hi,
>
> On Thu, Nov 13, 2014 at 01:57:08PM +0100, Heiner Meier wrote:
>> Hello,
>>
>> i need an Cluster with drbd, the active Cluster Member should hold a
>> running kvm instance, started via libvirt.
>>
>> A virtual IP is not needet.
>>
>> It runs, but from time to Time it doesnt take over correctly when i
>> reboot the "master" System, normaly all resources after the machine is
>> up again should migrate back to the master System (via location statement).
>>
>> In the most cases this works, but from time to time drbd failed and the
>> ressources stay on the slave Server, after rebooting the master Server
>> one time more, all is OK.
>>
>> What i later still need ist a automatic drbd Split Brain recovery, if
>> anyone have a working config for this it should be interesting to see it.
>>
>> Here is my pacemaker configuration:
>>
>> node $id="1084777473" master \
>> attributes standby="off" maintenance="off"
>> node $id="1084777474" slave \
>> attributes maintenance="off" standby="off"
>> primitive libvirt upstart:libvirt-bin \
>> op start timeout="120s" interval="0" \
>> op stop timeout="120s" interval="0" \
>> op monitor interval="30s" \
>> meta target-role="Started"
>> primitive vmdata ocf:linbit:drbd \
>> params drbd_resource="vmdata" \
>> op monitor interval="29s" role="Master" \
>> op monitor interval="31s" role="Slave"
>> primitive vmdata_fs ocf:heartbeat:Filesystem \
>> params device="/dev/drbd0" directory="/vmdata" fstype="ext4" \
>> meta target-role="Started"
>> ms drbd_master_slave vmdata \
>> meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1"
>> notify="true"
>> location PrimaryNode-libvirt libvirt 200: master
>> location PrimaryNode-vmdata_fs vmdata_fs 200: master
>> location SecondaryNode-libvirt libvirt 10: slave
>> location SecondaryNode-vmdata_fs vmdata_fs 10: slave
>> colocation services_colo inf: drbd_master_slave:Master vmdata_fs
>
> This one should be the other way around:
>
> colocation services_colo inf: vmdata_fs drbd_master_slave:Master
>
>> order fs_after_drbd inf: drbd_master_slave:promote vmdata_fs:start
>> libvirt:start
>
> And you need one more collocation:
>
> colocation libvirt-with-fs inf: libvirt vmdata_fs
>
> HTH,
>
> Dejan
>
>> property $id="cib-bootstrap-options" \
>> dc-version="1.1.10-42f2063" \
>> cluster-infrastructure="corosync" \
>> stonith-enabled="false" \
>> no-quorum-policy="ignore" \
>> last-lrm-refresh="1415619869"
>>
>>
>> There must be an Error in this configuration, but i dont know in which
>> part.
>>
>> _______________________________________________
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>> 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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> 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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