topic Re: halting cluster without halting package in Operating System - HP-UX

halting cluster without halting package

Quin Hammes — Mon, 18 Jun 2001 19:11:08 GMT

We need to update the timing variables for the cluster but we do not want to bring down the package. Is there a way to bring down a cluster without bringing down the package (or just the applications which are part of the package) so you can update timing variables? I could just edit the stop and start scripts so it does not do anything and then bring down the cluster but I don't want the volume group deactivated or anything. Any suggestions? We are not running a monitorig script nor are we using using any services. Any help would be appreciated.

Quin

Re: halting cluster without halting package

Carsten Krege — Tue, 19 Jun 2001 04:46:02 GMT

This won't work. You could replace the package control script with a simple script that does nothing else but "exit 0", leaving the package up and running when running cmhaltpkg.
But you still wouldn't be able to halt the cluster while the VG is activated in exclusive mode (vgchange -a e), what is the normal case.

Halting the node, with the package VG still activated, would give you:

"Clustered Volume Groups must be deactivated before the cluster can be halted."

Since the VG can only be deactivated when all filesystems are umounted, you need to halt your application first, before you can do this.

BTW, what timing parameters do you want to change and why?

Carsten

Re: halting cluster without halting package

melvyn burnard — Tue, 19 Jun 2001 06:37:26 GMT

What you are looking to do cannot be done.
If you try to force the packages to stay up, i.e. VG's are activated, then the cluster will not halt. SG is not designed to work in this way. You will need to halt the cluster, make your changes and then restart the cluster and packages.

Re: halting cluster without halting package

Rita C Workman — Tue, 19 Jun 2001 11:58:54 GMT

The experts have given you the answer...
The package is part of the cluster. You can not stop the whole, without the parts of it being stopped as well.

Rita

Re: halting cluster without halting package

Vincenzo Restuccia — Tue, 19 Jun 2001 15:32:22 GMT

#cmhaltpkg
#vgchange -c n /dev/vgcluster
#vgchange -a y /dev/vgcluster
#mount /dev/vgcluster/lvolx /mount_point

Re: halting cluster without halting package

Vincenzo Restuccia — Tue, 19 Jun 2001 15:34:30 GMT

sorry #cmhaltpkg -> cmhaltcl

Re: halting cluster without halting package

melvyn burnard — Tue, 19 Jun 2001 20:06:14 GMT

And by the time you have done the last two suggestions, you could have reapplied th ebinary and restarted the cluster !