Hi I am running a 2 node cluster with this config on centos 6.5/6.6 where i have a multi-state resource foo being run in master/slave mode and a bunch of floating IP addresses configured. Additionally i have a collocation constraint for the IP addr to be collocated with the master.
Please find the following files attached cluster.conf CIB Issues that i have :- 1. Daemons required for fencing Earlier we were invoking cman start quorum from pacemaker script which ensured that fenced / gfs and other daemons are not started. This was ok since fencing wasn't being handled earlier. For fencing purpose do we only need the fenced to be started ? We don't have any gfs partitions that we want to monitor via pacemaker. My concern here is that if i use the unmodified script then pacemaker start time increases significantly. I see a difference of 60 sec from the earlier startup before service pacemaker status shows up as started. 2. Fencing test cases. Based on the internet queries i could find , apart from plugging out the dedicated cable. The only other case suggested is killing corosync process on one of the nodes. Are there any other basic cases that i should look at ? What about bring up interface down manually ? I understand that this is an unlikely scenario but i am just looking for more ways to test this out. 3. Testing whether fencing is working or not. Previously i have been using fence_ilo4 from the shell to test whether the command is working. I was assuming that similar invocation would be done by stonith when actual fencing needs to be done. However based on other threads i could find people also use fence_tool <node-name> to try this out. According to me this tests out whether fencing when invoked by fenced for a particular node succeeds or not. Is that valid ? Since we are configuring fence_pcmk as the fence device the flow of things is fenced -> fence_pcmk -> stonith -> fence agent. 4. Fencing agent to be used (fence_ipmilan vs fence_ilo4) Also for ILO fencing i see fence_ilo4 and fence_ipmilan both available. I had been using fence_ilo4 till now. I think this mail has multiple questions and i will probably send out another mail for a few issues i see after fencing takes place. Thanks in advance Arjun
cib
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cluster.conf
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