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I have 2 CentOS machines with Heartbeat. If node01 has a problem or reboots, node02 takes over -- this works.

After node01 comes back up, node01 is no longer my primary which is great (node02 has taken over). But when I reboot node02, node01 becomes the primary again.

I don't want node01 to become primary again. I want to wait for node02 to come up as the primary. How can I achieve this?

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Why would you want a HA configuration to not fail over to a working node when the other node goes away? – womble Mar 25 '12 at 19:37
they are both Mysql servers. I don't want to take any chances. If my Master server goes down (reboot, service goes up and down) I want node02 to take over and in the meantime I'll fix Node01 but I prefer that if for some reason node02 goes down then I lose the HA. is that possible? – edotan Mar 25 '12 at 19:47
I seriously doubt it. You probably want to do manually-triggered failovers (stop one, start the other) anyway, given that want to take no chances. – womble Mar 25 '12 at 19:52
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I think this question is valid and good. There might be reasons to prevent a failback until the source of the problem has been found and eliminated. – Nils Mar 25 '12 at 20:32

1 Answer

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If you want to avoid a "ping-pong" situation or want to check the system before it is ready to take over services again, I would recommend to

  • Start heartbeat manually after system boot chkconfig heartbeat off
  • Stop heartbeat after failover on the failed node.

The latter is a little bit tricky - but you could define a resource in your mysql-resource-group that stops heartbeat (but I would not recommend that - since you are shooting at your own feet that way).

This might be better outside heartbeat-control (perhaps a script that checks if cl_status rscstatus returns none and then stops heartbeat.

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