[Pacemaker] How to add new resources to the production cluster

[Dejan Muhamedagic]

Hi,

On Thu, Sep 10, 2009 at 11:44:32AM +0200, Schmidt, Florian wrote:
> Hi list, 
> 
> It's my task to add a new resource (and also the corresponding drbddisk
> and Filesystem resources) to our production cluster.
> 
> Is this the right way to do this on pacemaker 0.6.5-8.2:

You should upgrade to pacemaker 1.0.5, if you can.

> cibadmin -Q > tmp.xml
> 
> edit the tmp.xml
> 	-add one resource group for both the drbddisk and Filesystem-RA,
> just like I did it before
> 	- add one primitive for the main resource
> 	- add the collocation- and ordering constraints
> 	- increase the admin_epoch #
> 
> check the tmp.xml file with crm_verify
> 
> check the config with ptest and try to understand the .dot-graph ;)

Good luck :)

> reload the config into the cluster with cibadmin --cib_replace
> --xml-file tmp.xml

Right.

> Questions:
> - tmp.xml contains both the config and the status section. Does this
> cause trouble, when replacing the old configuration?

Yes, you should remove the status section.

> - do I have to increment the admin_epoch #?

Either that or the epoch attribute. The update must be newer than
the running configuration. admin_epoch overrides epoch.

> - Is there a command to get both the resources-section and the
> constraints-section (which I think are the sections you have to modify
> mostly), without the status-section (something like cibadmin -Q -o
> configuration)?

I'm not sure. I think that you can get e.g. just resources or
just constraints, but not both without the status section.

Thanks,

Dejan

> 
> TIA
> 
> 
> Florian
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