topic Re: Removing node from the cluster in Operating System - HP-UX

Removing node from the cluster

Srinikalyan — Tue, 22 Sep 2009 12:22:50 GMT

Hi,

HP-UX 11iv2
SG A.11.17
I have a two node SG cluster node1 and node2. For one of the deployment to be carried out, we need to bring out the node2(adoptive) out of the cluster (Say for 2 months period). For that we need to remove all the references of node2 in the cluster conf files. Can that be done without halting the cluster and package(running on node1)?

Thanks,
Srini

Re: Removing node from the cluster

SUDHAKAR_18 — Tue, 22 Sep 2009 13:17:04 GMT

Halt the package on the one of the node.

then edit the cluster configuration files.

Dont edit the conf files when cluter is working !!

Re: Removing node from the cluster

Steven E. Protter — Tue, 22 Sep 2009 13:25:20 GMT

Shalom,

cmviewcl -v

To see what is running where.

You can do this:
cmhaltnode
# On node 2

Or you can move all the packages from node2 to node1 and then cmhaltnode.

What you need to be certain of is that all your packages will run on node1.

SEP

Re: Removing node from the cluster

Stephen Doud — Tue, 22 Sep 2009 14:03:04 GMT

1) halt any package running on node2

2) Edit the package configuration files that reference node2. Comment out:
#NODE_NAME

repeat for each package.

3) cmapplyconf -f -P ...

4) edit the cluster configuration file. Comment out the node2 lines

5) update the cluster: cmapplyconf -f -C

When you are ready to bring node2 back into the cluster, reverse these steps.

Re: Removing node from the cluster

Srinikalyan — Wed, 23 Sep 2009 01:57:27 GMT

As I said before all the packages are currently running in node1. Node2 is the failover node.

I believe removing the references in the package and cluster conf and applying the conf, doesn't required to be halt the package and the cluster. Please confirm.

Thanks,
Srini

Re: Removing node from the cluster

Stephen Doud — Wed, 23 Sep 2009 13:36:27 GMT

All currently supported versions of Serviceguard permit online (while the cluster is running) removal of a node from a cluster, or addition of a node to the cluster.

Re: Removing node from the cluster

Srinikalyan — Thu, 24 Sep 2009 12:23:58 GMT

Thanks for all.