Originally posted by: dot7171

I have a two-node cluster with one as primary and the other as failover. I will be replacing
the failover with a new server. So I need to add the new server to the cluster and make it the new failover server, then remove the old failover server from the cluster

Can this be done while the cluster is up and the application is running? If anyone has done this before
could you provide the steps you took

Thanks
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Originally posted by: bodily

Though it may vary ever so slightly based on the version of PowerHA/HACMP you are running the short answer here again is yes you can.

I would see something like this. Add the cluster nodename, topology info (assuming proper boot IPs are already configured), make sure the shared disks are seen with their PVIDs so the shared datavg can updated (may have to C-SPOC to do it, this may prove to be the tricky part of the whole thing). Of course also make sure the app server scripts exist in the proper location, and /etc/hosts has all the appropriate cluster IP entries. Probably a good time to run a sync at this point.

Then swap the two nodes (old failover for new failover) in the RG list, sync again.

Then go delete the old fallover cluster node. Deleting the old cluster node SHOULD delete everything associated with that node. That is something that has varied in versions but recent 3-4 versions should clean it up associated topology for you. Then sync again and you should be done.

Now of course, proper change management says this should all be tested in a test environment first.
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