Question on adding new server to existing pool in OVM 2.2 environment

Question

I have an existing iscsi based server pool with one server attached to the pool. I am adding a second ovm server. I have configured the iscsi and multipath modules and can see the repository lun.
I then added the server to the pool via ovm manager, but the server is not fully participating as the agent did not create a mount point for /OVS so I can't see the repos directiories from the new server. A "df" does not show the device as it does on the first server.
The manager gui does show the server as part of the pool even though we received an error.
In the ovm manager log, we see the following messages.
Check prerequisites to add server (ovm2.highlinehosting.com) to server pool (san_pool1) succeed
During adding servers ([ovm2.domain.com]) to server pool (san_pool1), Cluster setup failed: (OVM-1011 OVM Manager communication with ovm1.domain.com for operation HA Setup for Oracle VM Agent 2.2.0 failed: errcode=00000, errmsg=Unexpected error: <Exception: ha_check_cpu_compatibility failed:<Exception: CPU not compatible! {'ovm1.domain.com': 'vendor_id=GenuineIntel;cpu_family=6;model=44', 'ovm2.highlinehosting.com': 'vendor_id=GenuineIntel;cpu_family=6;model=46'}> )
I'm not sure why it's complaining about cpu compatibility as we are not using any HA features at this time, and both servers are identical in make and model. They are both equipped with the same cpu type and speed.
I checked ocfs2 network connectivity by executing the command "nc -zv nodename 7777", which ran successfully from both nodes. The manager was able to propagate a valid cluster.conf file to both servers. I restarted the ovs-agent service on the new server.
Are there any other configuration steps that I need to take on the new server before trying to add it to the pool? I do need to tread carefully as I have live guests running in the pool.
Thx

Answer 1

Bob Weinmann wrote:
If I have to go the route of using a separate pool for each server, do you have any suggestions on how I would be able to access the repos of server1 from server2 if server1 were to go down hard? I don't mean to access it as a repos for running the vms, but just to be able to copy the vm files over to the running server.This would be possible if you were using NFS for your storage, but not if you're using FC or iSCSI, as the LUN is formatted with the OCFS2 cluster ID of each pool, so probably wouldn't be able to be mounted by another pool. Your best bet is to upgrade to Oracle VM 3.0 so that you can create a pool that contains both servers: you won't have live migration, but HA will still work just fine.