[ClusterLabs] Forcing rgmanager to re-read the config

Digimer lists at alteeve.ca
Thu Jul 9 00:41:09 UTC 2015


Hi all,

Second time in a couple of years I hit a weird bug... I have no idea how
to reproduce it, sadly.

I added a VM to cluster.conf via ccs and it showed up on node 1 but not
node 2. I confirmed that node 2 had the updated cluster.conf, but the
running process wouldn't see it.

I tried up'ing the version and running 'cman_tool version -r', no bueno
(tried on both nodes). I tried deleting the VM, pushing the new
cluster.conf and it disappeared from node 1 as expected. Added it back,
pushed again and again, only showed up on node 1's 'clustat'. I tried
again on the other node. No bueno...

So I tried freezing all of the services on both nodes and restart
rgmanager on both nodes. The stop didn't touch the services, but
starting it back up tore down and restarted the services, messing up the
VMs. =/

I noticed on node 2 the following during shutdown:

========
Jul  8 20:24:57 rm-a01n02 rgmanager[3971]: Shutting down
Jul  8 20:25:07 rm-a01n02 rgmanager[3971]: Shutting down
Jul  8 20:25:08 rm-a01n02 rgmanager[3971]: Member 1 shutting down
Jul  8 20:25:13 rm-a01n02 rgmanager[3971]: Initializing vm:vm07-rhel6-temp
Jul  8 20:25:13 rm-a01n02 rgmanager[3971]: vm:vm07-rhel6-temp was added
to the config, but I am not initializing it.
Jul  8 20:25:13 rm-a01n02 rgmanager[3971]: Reconfiguring
Jul  8 20:25:16 rm-a01n02 rgmanager[3971]: Reconfiguring
Jul  8 20:25:17 rm-a01n02 rgmanager[3971]: Disconnecting from CMAN
Jul  8 20:25:18 rm-a01n02 rgmanager[3971]: Reconfiguring
Jul  8 20:25:21 rm-a01n02 rgmanager[3971]: Reconfiguring
Jul  8 20:25:24 rm-a01n02 rgmanager[3971]: Reconfiguring
Jul  8 20:25:27 rm-a01n02 rgmanager[3971]: Reconfiguring
Jul  8 20:25:32 rm-a01n02 rgmanager[3971]: Exiting
========

Notice that at this point, the VM suddenly was found.

So I am wondering; Is it possible to force the process above without
restarting rgmanager?

-- 
Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without
access to education?




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