Alain Moulle wrote: >>>> Hi >>>> >>>> I wonder what is the best way to stop safely the CS 4 on a big amount >>>> HA pairs, from a management node, with the idea to shutdown >>>> all nodes after that : >>>> >>>> Is it better to use : >>>> 1/ >>>> pdsh "clusvcadm -l" launched on all nodes >>>> then >>>> pdsh "clushutdown" launched on all nodes >>>> then >>>> proceed to poweroff on all nodes. >>>> >>>> or >>>> 2/ >>>> pdsh "service rgmanager stop" launched on all nodes >>>> pdsh "service fenced stop" launched on all nodes >>>> pdsh "service cman stop" launched on all nodes >>>> pdsh "service ccsd stop" launched on all nodes >>>> >>>> I think that 1/ is more safe, because in 2/ some applications >>>> could begin to failover just before the 2nd node of a pair >>>> receives at its turn the stop commands . >>>> The 1/ avoids any attempt to failover for nothing. >>>> >>>> Am I right ? >>>> Thanks >>>> Alain >>>> >> Hi Alain, >> I'm kind of new to this (so I could be wrong), but here are my beliefs: >> Option 1 only takes care of stopping the rgmanager services running on the >> cluster. (Besides, clushutdown already does a clusvcadm -l for you). It >> really doesn't inform the rest of the cluster the intent of the node >> going down. >> Option 2 shouldn't really be necessary, because reboot or halt should >> execute the proper service shutdowns in the proper order. However, it >> also doesn't inform the rest of the cluster the intent of the node going >> down. >> You want to inform the rest of the cluster that they're going down, >> otherwise >> some of the nodes may start trying to fence the other nodes going down, etc. >> Perhaps you should consider something like: >> pdsh "clushutdown" launched on all nodes >> pdsh "cman_tool leave remove" launched on all nodes >> pdsh "shutdown" or "halt" launched on all nodes >> Regards, >> Bob Peterson >> Red Hat Cluster Suite Hi Bob Thanks for you clarification . Nethertheless, several questions : 1/It seems that clushutdown is not packaged in the CS4 update 2 rpms whereas the man is in package ... is it missing for a special reason ? 2/ what does cman_tool leave remove does exactly ? and would it be a workaround for the remaining problem about "service cman stop" which fails 1 time for 5 (and in this case lsmod lists a remaining user of the module, but without its name) Regards Alain Moullé -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
