topic Re: how to start a SG cluster without start packets in Operating System - HP-UX

how to start a SG cluster without start packets

Jdamian — Fri, 14 Mar 2003 11:49:49 GMT

I need start a Service Guard cluster without starting its packet. Is it possible ?

thanx in advance

Re: how to start a SG cluster without start packets

melvyn burnard — Fri, 14 Mar 2003 12:02:20 GMT

well if you have them already configured to auto start in the binary, the only way to do this is to re appply the binary, with each package being changed to have AUTO_RUN set to NO.
Otherwise there is no other way,as you cannot do a cmmodpkg -d wihtout the cmcld process running.

Re: how to start a SG cluster without start packets

John Palmer — Fri, 14 Mar 2003 12:06:20 GMT

Only if you've got each packaged configured with AUTO_RUN set to NO.

Change each package control file, reconfigure the cluster then you can start it without any packages. Subsequently you can start the packages manually with cmrunpkg.

Regards,
John

Re: how to start a SG cluster without start packets

Rainer von Bongartz — Fri, 14 Mar 2003 12:09:35 GMT

Set AUTO_RUN NO in your packages configuration files

See also:
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x826f42308663d611abdb0090277a778c,00.html

Regards
Rainer

Re: how to start a SG cluster without start packets

Ralph Grothe — Fri, 14 Mar 2003 13:32:42 GMT

That's an interesting issue I also occasionally felt the urge to be dealt with.

I finally came up with a script that modified all packages' AUT_START settings, distributed this to all cluster nodes, and finished with an cmapplyconf.

Since this is far from satisfactory, I wonder if it weren't possible to hold two different cluster config binaries in stock which one only would have to rename in case one wanted to start a cluster without also starting the packages?
Is this feasible?

Re: how to start a SG cluster without start packets

melvyn burnard — Fri, 14 Mar 2003 13:35:02 GMT

Ralph
I can say it is not "supportable" but that just meas we have not tested it.
SO you may have to try it, and see how it goes.

Re: how to start a SG cluster without start packets

Trond Haugen — Fri, 14 Mar 2003 13:39:18 GMT

A "dirty trick" would be to rename the package control script. That would make the starting of the package fail.

Regards,
Trond

Re: how to start a SG cluster without start packets

John Palmer — Fri, 14 Mar 2003 13:43:42 GMT

Or simply chmod the package control script so that it's not executable.

You could also consider adding some logic to the script that constitutes the package so that it doesn't start any app or whatever. Sometimes it's useful for maintenance to have the package infrastrucure available (VG's etc) without the application.

Regards,
John

Re: how to start a SG cluster without start packets

Jdamian — Fri, 14 Mar 2003 15:32:45 GMT

I cannot find AUTO_RUN on my packect control file.

is it available for Service Guard A.11.09 ?

Re: how to start a SG cluster without start packets

Duncan Edmonstone — Fri, 14 Mar 2003 15:37:17 GMT

In 11.09 AUTO_RUN was known as PKG_SWITCHING_ENABLED

It does the same thing.

HTH

Duncan

Re: how to start a SG cluster without start packets

Jdamian — Fri, 14 Mar 2003 15:54:27 GMT

PKG_SWITCHING_ENABLE ?

the text lines describing that item says:

# The default for PKG_SWITCHING_ENABLED is YES. In the event of a
# failure, this permits the cluster software to transfer the package
# to an adoptive node. Adjust as necessary.

PKG_SWITCHING_ENABLED YES

according to this, If I change it to NO, my packet won't switch to other node... then, what do I want a cluster for ?

I need to prevent packet starting when cluster forms, not prevent switching packet from a node to other when packet fails.

Re: how to start a SG cluster without start packets

John Palmer — Fri, 14 Mar 2003 16:03:50 GMT

But you're not starting it at all so it can't possibly switch!

HP have renamed the keyword to avoid this confusion.

Once you've started the package, you can change the setting with cmmodpkg.

Regards,
John