NETWORK IP ADDRESS on HACMP Post: 302171039

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Operating Systems AIX NETWORK IP ADDRESS on HACMP Post 302171039 by bakunin on Wednesday 27th of February 2008 11:39:21 AM

02-27-2008

Registered User

baochengchen - while being correct - is a bit short on the topic.

First off it depends which version of HACMP you are planning to use. HACMP v4.x uses concepts which are completely different from HACMP v5.x (in fact it is often easier to explain HACMP 5 to people who have never worked with HACMP than to people familiar with HACMP 4).

So please tell us which version of AIX and HACMP you are going to use and which type of cluster you want to achieve: are the two cluster nodes (lets call them A and B) both working or is one idle (is it a "cascading" or a "rotating" cluster)?

There are setups where the production is on node A and some test/development environment on node B. If node A fails, the test environment is shut down and Node B acts as if it were Node A with the production. If Node B fails nothing happens. This layout is called "cascading".

If you have an application A on Node A and an application B on node B and whenever one of the nodes fail the other will take over and run both apps or if you have only one app and 2 nodes where one will always be idle this is called a "rotating" type of cluster.

So to tell you what you have to do you will have to tell us more about your plans and about your equipment with which you want to achieve your goals.

bakunin

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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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