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Operating Systems AIX AIX Hardware Migration w/ HACMP...Advice Needed Post 302971881 by bakunin on Tuesday 26th of April 2016 02:28:55 PM
Old 04-26-2016
Quote:
Originally Posted by uzair_rock
How should I add those disks/VGs on the resource group and re-configure the cluster with the imported npiv disks. can you please explain?
You can configure your cluster with a single disk (visible on all cluster-nodes) as a stand-in. WIth this you test all the IP-adresses, start-/stop-scripts, etc.. You said you want to use new IP-ranges anyways, so you can test with your new production-IPs safely while the old cluster is still running.

On the day of the transition you

- zone the datadisks of your old cluster to the new cluster-nodes (you need SAN support for this)

- throw away your (test-)VG and the RG residing on it.

- run cfgmgr to see the newly discovered discs, import the VGs on all nodes (be sure to end with concurrent-capable Vgs), run a clmgr disco vg ("discover VGs") on one node to make the VGs available in HACMP and run the RG-definition from above (clmgr add rg ...) again. It is that simple.

Do yourself a favour: when importing the VGs on all nodes make sure the same VG gets the same major number on all nodes. It will work without that too, but it makes keeping track easier that way. I even try to have the same hdisk-numbers on all nodes, so that hdiskXX on node1 is also hdiskXX on node2, etc..

I hope that helps.

bakunin
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cmrunnode(1m)															     cmrunnode(1m)

NAME
cmrunnode - run a node in a high availability cluster SYNOPSIS
cmrunnode [-v] [node_name...] [-t | -w none] DESCRIPTION
cmrunnode causes a node to start its cluster daemon to join the existing cluster. This command verifies the network configuration before causing the node to start its cluster daemon. To start a cluster on one of its nodes, a user must either be superuser(UID=0), or have an access policy of FULL_ADMIN allowed in the clus- ter configuration file. See access policy in cmquerycl(1m). Starting a node will not cause any active packages to be moved to the new node. However, if a package is DOWN, has its switching enabled, and is able to run on the new node, that package will automatically run there. If node_name is not specified, the cluster daemon will be started on the local node and will join the existing cluster. Options cmrunnode supports the following options: -v Verbose output will be displayed. -t Test only. Provide an assessment of the package placement without affecting the current state of the nodes or packages. The -w option is not required with the -t option as -t does not validate network connectivity, but assumes that all the nodes can meet any external dependencies such as EMS resources, package subnets, and storage. node_name... Start the cluster daemon on the specified node(s). -w none By default network probing is performed to check that the network connectivity is the same as when the cluster was configured. Any anomalies are reported before the cluster daemons are started. The -w none option disables this probing. The option should only be used if this network configuration is known to be correct from a recent check. RETURN VALUE
cmrunnode returns the following value: 0 Successful completion. 1 Command failed. EXAMPLES
Run the cluster daemon on the current node: cmrunnode Run the cluster daemons on node1 and node2: cmrunnode node1 node2 AUTHOR
cmrunnode was developed by HP. SEE ALSO
cmquerycl(1m), cmhaltcl(1m), cmhaltnode(1m), cmruncl(1m), cmviewcl(1m), cmeval(1m). Requires Optional Serviceguard Software cmrunnode(1m)
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