[Pacemaker] apache on too many nodes?

[Andreas Kurz]

On 10/03/2012 10:47 PM, Jake Smith wrote:
> 
> 
> 
> ----- 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

It has to be:

colocation lamp_services inf: drbd_fs services_group drbd_ms:Master

... if you really want to use resource-sets, I'd recommend putting the
fs into the services_group on the first position to avoid confusion and use:

colocation lamp_services inf: services_group drbd_ms:Master

You disabled automatic start via init for apache & mysql? You checked
the apache LSB script for LSB compliance?

Regards,
Andreas

-- 
Need help with Pacemaker?
http://www.hastexo.com/now

> 
> 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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>>
> 
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