[Pacemaker] apache on too many nodes?

Jake Smith jsmith at argotec.com
Wed Oct 3 16:47:55 EDT 2012

----- Original Message -----
> From: marvin at nic.fi
> To: pacemaker at oss.clusterlabs.org
> Sent: Wednesday, October 3, 2012 4:36:10 PM
> Subject: [Pacemaker] apache on too many nodes?
> Hello,
> I'm currently testing out a 2 node system with the simple goal of
> providing failover so that the services are run on one node at a
> time.
> I have some of the mysql and apache configuration files in the drbd
> partition.
> Without apache everything works as expected drbd and mysql start and
> stop properly on the nodes, but as soon as i try to put apache into
> to mix nothing works anymore.
> Using the following configuration:
> primitive drbd ocf:linbit:drbd params drbd_resource="drbd" op start
> interval="0" timeout="240s" op stop interval="0" timeout="100s"
> ms drbd_ms drbd meta master-max="1" master-node-max="1" clone-max="2"
> clone-node-max="1" notify="true"
> primitive drbd_fs ocf:heartbeat:Filesystem params device="/dev/drbd0"
> directory="/mnt/drbd" fstype="ext3" op start interval="0"
> timeout="60" op stop interval="0" timeout="120"
> primitive service_mysqld lsb:mysql op monitor interval="15s"
> primitive service_apache lsb:apache2 op monitor interval="15s"
> group services_group service_mysqld service_apache
> colocation lamp_services inf: drbd_fs drbd_ms:Master services_group

Pretty sure your colocation is the problem - services_group should be first not last...

colocation lamp_services inf: services_group drbd_fs drbd_ms:Master

because you want the services group to run on the same node as the drbd filesystem which has to run on the same node as the drbd Master.

> order lamp_order inf: drbd_ms:promote drbd_fs:start
> services_group:start
> I think it wants to start apache on both nodes for some reason (and
> fails ofcourse) and promptly stops everything.
> service_apache (lsb:apache2) Started (unmanaged) FAILED[ node1 node2
> ]
> I'm probably doing something stupid here. Using debian squeeze.
> :Mrv
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