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Hello there,
I’m new in setting up pacemaker and need some help.
My config is similar to the following howto:
http://blog.non-a.net/2011/03/27/cluster_drbd
The only modification is use of mysql instead of apache2.
At first time try, everything worked fine. Both nodes came up and the ha1-node went in service. If ha1 failed (reboot/shutdown) ha2 took all services. If ha1 came online again it took all resources again, just as excepted. BUT: If ha2 went offline and came online again, resource drbd didn’t came online again, cause it detected a split-brain and corosync kept starting and stopping drbd on ha2. (Drbd had to resnyc the whole disk every time it failed.)
Maybe I fixed that by modifying /etc/drbd.d/global_common.conf and added “ disk { fencing resource only; } Don’t know exactly, but if ha2 disconnects and connects again no full-sync happens right now.
But at the end I’m getting confused. Actually only ha1-node can become Master and if ha1 fails, ha2 does not take the resources and stays slave. I’m now trying almost 2 days to figure out the problem. Google dind’t help at all.
crm_mon --one-shot –V says:
Stack: openais Current DC: mysql-drbd-ha2 - partition with quorum Version: 1.0.9-74392a28b7f31d7ddc86689598bd23114f58978b 2 Nodes configured, 2 expected votes 3 Resources configured. ============
Online: [ mysql-drbd-ha1 mysql-drbd-ha2 ]
Resource Group: lvm datavg (ocf::heartbeat:LVM): Started mysql-drbd-ha1 fs_mysql (ocf::heartbeat:Filesystem): Started mysql-drbd-ha1 Resource Group: mysql_grp app_ip (ocf::heartbeat:IPaddr): Started mysql-drbd-ha1 app_mysql (lsb:mysql): Started mysql-drbd-ha1 Master/Slave Set: ms_drbd Masters: [ mysql-drbd-ha1 ] Slaves: [ mysql-drbd-ha2 ]
Failed actions: drbd:0_promote_0 (node=mysql-drbd-ha2, call=158, rc=1, status=complete): unknown error
after crm node standby of ha1-node it says
“ Node mysql-drbd-ha1: standby Online: [ mysql-drbd-ha2 ]
Resource Group: lvm datavg (ocf::heartbeat:LVM): Started mysql-drbd-ha2 fs_mysql (ocf::heartbeat:Filesystem): Started mysql-drbd-ha2 Resource Group: mysql_grp app_ip (ocf::heartbeat:IPaddr): Started mysql-drbd-ha2 app_mysql (lsb:mysql): Started mysql-drbd-ha2 Master/Slave Set: ms_drbd Masters: [ mysql-drbd-ha2 ] Stopped: [ drbd:1 ] “
After “crm node online” on ha1 it still is like:
“ Online: [ mysql-drbd-ha1 mysql-drbd-ha2 ]
Resource Group: lvm datavg (ocf::heartbeat:LVM): Started mysql-drbd-ha2 fs_mysql (ocf::heartbeat:Filesystem): Started mysql-drbd-ha2 Resource Group: mysql_grp app_ip (ocf::heartbeat:IPaddr): Started mysql-drbd-ha2 app_mysql (lsb:mysql): Started mysql-drbd-ha2 Master/Slave Set: ms_drbd Masters: [ mysql-drbd-ha2 ] Stopped: [ drbd:1 ]
“
Ha1 won’t become master again, unless I stop both nodes, clear the crm config and reload it. That’s not working for productive use at all.
If you need configs and logs, please write.
Thanks in advance and greetings from Frankfurt/Main, Germany
Marcus
mcn tele.com AG Im Galluspark 17, 60326 Frankfurt Aufsichtsrat: Uwe Ruecker (Vors.) Vorstand: Wolfgang Gluecks, Ralf Taegener Sitz und Registergericht: Amtsgericht Frankfurt a.M. - HRB Nr. 89717 Registerangaben: www.mcn-tele.com Diese E-Mail enthaelt vertrauliche Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtuemlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten diese E-Mail. This e-mail contains confidential information. If you are not the intended recipient or have received this e-mail in error, please notify the sender immediately and destroy this e-mail. |
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