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<p class="MsoNormal">Hi!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">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).<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">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:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Resource Group: cluster_grp<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> fs_r0 (ocf::heartbeat:Filesystem): Started qs-cms-appl01<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> sharedIP (ocf::heartbeat:IPaddr2): Started qs-cms-appl01<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> database_res (ocf::heartbeat:mysql): Started qs-cms-appl01<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> tomcat_res (ocf::ucrs:tomcat): Started qs-cms-appl01<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Master/Slave Set: ms_drbd_r0<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Masters: [ qs-cms-appl01 ]<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"> Slaves: [ qs-cms-appl02 ]<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">There was only one further colocation-constrain, which let fs_r0 only run where ms_drbd was running in Master mode. Easy.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Now, with our new scenario, the situation is a little more complex. First, the start order:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">sharedIP<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ms_MySQL:Master<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">activemq_clone<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ms_tomcat:Master<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">then the constrains:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ms_MySQL:Master only where shared_IP<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ms_tomcat:Master only where database<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">activemq_clone only where database <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">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?
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If I try...<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">group cluster-grp p_writer_vip ms_MySQL:Master activemq_clone ms_tomcat:Master<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I get:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ERROR: object ms_MySQL:Master does not exist<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ERROR: object ms_tomcat:Master does not exist<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Any ideas welcome.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Cheers and thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Andreas<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:8.0pt;font-family:"Arial","sans-serif";color:gray;mso-fareast-language:DE">--<br>
CONET Solutions GmbH </span><span lang="EN-US"><o:p></o:p></span></p>
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<p class="e41b5dfe-2a5c-43f9-ae67-51ef28d1add3">----------------------------<br>
CONET Solutions GmbH, Theodor-Heuss-Allee 19, 53773 Hennef.<br>
Registergericht/Registration Court: Amtsgericht Siegburg (HRB Nr. 9136)<br>
Geschäftsführer/Managing Director: Anke Höfer </p>
<p class="e41b5dfe-2a5c-43f9-ae67-51ef28d1add3"> ----------------------------</p>
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