topic Single Node Cluster in Operating System - HP-UX

Single Node Cluster

Senthilkumaran.T — Fri, 18 Jan 2002 05:20:29 GMT

Hello,

Can I set up the single node cluster without any failover policy?. If yes, could you let me the steps also?

Background:
I have only one server, the second server takes more than one month to reach. Therefore, I intend to setup a single node cluster by mounting volume groups when cluster and package starts. This package does not have any fail over scripts.

Regards
Senthil

Re: Single Node Cluster

Animesh Chakraborty — Fri, 18 Jan 2002 06:21:14 GMT

Hi Senthil,

Yes you can configure single node cluster.
Go ahead as normal and no need to provide information regarding 2nd node in your configuration file.
See the link below.
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x92bf6af52b04d5118fef0090279cd0f9,00.html

Regards
Animesh

Re: Single Node Cluster

melvyn burnard — Fri, 18 Jan 2002 09:57:51 GMT

A single node cluster can be configured and will work, allowing you to use the network failover facility. Obviously, no package failover can be done. If you plan the network and disc connectivity correcttly, once your second system is available, you ensure the SG and patching levels are the same, make sure you kernels are correctly tuned/amended where necessary, connect the 2nd node to the discs and lan's.
You then try to see if SG is happy with the configuration by running (for example)
cmquerycl -v -C /etc/cmcluster/newconfig.ascii -n node1 -n node2

Check for any errors, and to see what the config file looks like.
You can then choose to recreate th ewhole new cluster, or just edit the exisiting ascii file, check with cmcheckconf, and add in the new node without taking down the existing cluster.
I believe this should be in the Managing MC/ServiceGuard manual at
http://docs.hp.com/hpux/ha