[Pacemaker] "Grouping" of master/slave resources
Stallmann, Andreas
AStallmann at CONET.DE
Mon Jun 25 16:14:58 UTC 2012
Hi!
We are currently switching from mysql-on-drbd with tomcat and a shared IP to mysql-master-slave with tomcat-master-slave and shared IP and an additonal cloned service (activemq).
Up until now we had quite an easy setup – especially for the admins who did the daily maintenance. All services (exept drbd) where grouped like this:
Resource Group: cluster_grp
fs_r0 (ocf::heartbeat:Filesystem): Started qs-cms-appl01
sharedIP (ocf::heartbeat:IPaddr2): Started qs-cms-appl01
database_res (ocf::heartbeat:mysql): Started qs-cms-appl01
tomcat_res (ocf::ucrs:tomcat): Started qs-cms-appl01
Master/Slave Set: ms_drbd_r0
Masters: [ qs-cms-appl01 ]
Slaves: [ qs-cms-appl02 ]
There was only one further colocation-constrain, which let fs_r0 only run where ms_drbd was running in Master mode. Easy.
Now, with our new scenario, the situation is a little more complex. First, the start order:
sharedIP
ms_MySQL:Master
activemq_clone
ms_tomcat:Master
then the constrains:
ms_MySQL:Master only where shared_IP
ms_tomcat:Master only where database
activemq_clone only where database
I thought this might be quite easy to achieve with grouping the services, but crm won’t let me put Master/Slave resource into a group. Why is that?
If I try...
group cluster-grp p_writer_vip ms_MySQL:Master activemq_clone ms_tomcat:Master
I get:
ERROR: object ms_MySQL:Master does not exist
ERROR: object ms_tomcat:Master does not exist
Any ideas welcome.
Cheers and thanks,
Andreas
--
CONET Solutions GmbH
----------------------------
CONET Solutions GmbH, Theodor-Heuss-Allee 19, 53773 Hennef.
Registergericht/Registration Court: Amtsgericht Siegburg (HRB Nr. 9136)
Geschäftsführer/Managing Director: Anke Höfer
----------------------------
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.clusterlabs.org/pipermail/pacemaker/attachments/20120625/9d7f1a1d/attachment-0003.html>
More information about the Pacemaker
mailing list