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Full Discussion: VCS - 3 node - IP change
Operating Systems Solaris VCS - 3 node - IP change Post 302921049 by rbatte1 on Tuesday 14th of October 2014 12:44:01 PM
Old 10-14-2014
The address that you publish for applications/people to use should be part of your cluster definition (and a DNS entry, of course) so that should be straightforward. The problem will come with how the nodes know each other. These will be the IP addresses you put on the cards as part of the OS and it depends how the cluster was created. These may be both the IP addresses that could be used if people knew about it and any that are non-routeable more usually used for backups or iSCSI access (if you use that) because your cluster nodes may all be set up to see each other across all the various paths.

In the extreme, you may need to do something like this for all nodes in the cluster in parallel:-
  • Stop cluster services (and prevent start on boot)
  • Edit cluster configurations for all heartbeats and node definitions
  • Set new static IP addresses on cards
  • Boot
  • Start cluster services2 (and enable start on boot if required)
  • Test
It may be better to edit the cluster configurations after the boot, and that is where their advice will be the best.

Can you list off the cluster configurations? They will be quite large so don't post them here, but your support will almost certainly want them. If you were AIX with IBM HA I'd have more advice. Sorry about that Smilie

I hope that this is useful though,
Robin
 

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LEARN ABOUT HPUX

cmrunnode

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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