How do I remove an MCSG cluster

[frederick hannah]

I have to two node cluster of MCSG 11.16. Only one package fails between each node. How do I remove the cluster resulting in two seperate servers wiithout MCSG. The OS is Hpux 11.11

[Patrick Wallek]

Shut down the packages.

Shut down the cluster.

Shut down MC/SG services.

Remove the MC/SG software.

Do this on both servers and you now have 2 stand-alone servers.

[Ivan Krastev]

See documentation - http://docs.hp.com/en/B3936-90117/ch07s09.html


regards,
ivan

[Ivan Krastev]

See the documentation - http://docs.hp.com/en/B3936-90117/ch07s09.html


regards,
ivan

[frederick hannah]

What files would I have to modify after the swremove of MCSG? /etc/fstab is one. /etc/lvmrc is another. Anymore?

[Eric SAUBIGNAC · Accepted solution]

Bonjour frederick,

I would say, in a general guideline :

- halt all packages (cmhaltpkg)
- stop the cluster (cmhaltcl)
- remove cluster configuration (cmdeleteconf)
- inhibit automatic startup of cluster in file /etc/rc.config.d/cmcluster on each node
- delete vg configurations that will not be use on each node (vgexport)
- modify /etc/lvmrc on each node to re-activate automatic vg activation at startup
- disable cluster bit on remaining vg on each node (vgchange -c n)
- activate in a normal way remaining vg on each node (vgchange -a y)
- modify /etc/fstab to mount all needed filesystems on each node
- mount this filesystems on each node

Now, you have to deal with the floatting IP. Your software is probably configured to work with it. So the simpliest way is to permanently add it in /etc/rc.config.d/netconf with virtual NIC like lan0:1.

Hope this will help

Eric

[frederick hannah]

Yes, Eric. That answers the bulk of my questions. Thank you and the rest of the guys, too.

[Eric SAUBIGNAC]

Fred,

you said <>

I don't think it's a good idea to remove MCSG. Just keep it inactive : maybe you will later decide to activate it again. And even if swremove works pretty well, there is always a risk to damage something. If you can avoid ...

And don't forget to assign points to each answer : it's a good engine so that this forum works well.

Eric

[Emil Velez]

cmdeleteconf

removes the cluster configuration from each node also

[frederick hannah]

thanks to all