Changing IP in a Serviceguard server

[Bandar_3]

We have MC Serviceguard 2 node cluster 1 pkg
We are going to upgrade our network class from class C to class B.
So we need to change our HPUX servers IP address which it’s running on cluster
Can anyone please tell the exact steps to do that with the minimum downtime if it possible?

[Steven E. Protter]

Shalom,

cmhaltnode the first server. Take it out of the cluster.

Make changes needed to the server.

Make any patches needed as well.

change the cluster configuration.

Distribute the cluster configuration to the second node.

enable the node you have been working on.

cmcheckconf
cmapplyconf

Your system is back in the cluster.

cmhaltnode the second node if needed.

Repeat the above steps.

Wala, changed both systems in a cluster with no down time.

SEP

[nanan]

You have to have cluster down time.
Because you need to change your cluster configuration.

1. cluster halt
cmhaltpkg -> cmhaltnode -> cmhaltcl
2. IP chnage
/etc/rc.config.d/netconf
3. Reflect the changed IP to the cluster configfile
/etc/cmcluster/cluser.asc
4. cluster compile
cmapplyconf -v -C /etc/cmclutser/clutser.asc

5. cmruncl


good luck!

[IT_2007 · Accepted solution]

Without shutting down entire cluster you won't be able to make changes since you are making changes to Network means you have to change in cmclconf.ascii file to reflect those changes and issue command like cmapplyconf so that binaries will be distributed to other node.

Since you are making changes to network, no need to update any patches unless you are going to install any OS softwares, products etc..

Here is the steps to have min. impact.
1. Bring down app first.
2. Then issue cmhaltpkg, cmhaltcl commands.
3. IP chnage on cmclconf.ascii in /etc/cmcluster directory.
Change IP address for lan in
/etc/rc.config.d/netconf file.
4. Make sure that your nework settings work.
5. Compile cluster ascii file
cmapplyconf -v -C /etc/cmclutser/cmclconf.ascii
7. cmruncl should bring up both nodes and package.

[Bandar_3]

Thanks guys very much for the valuables steps which it was exactly what I needed to do the job .

[Bandar_3]

I am closing the thread.
As I got the steps I was looking for .
Thanks again specially to Srini_2007 and nanan .