[Pacemaker] Dependency Trees

[Lars Marowsky-Bree]

On 2013-02-21T14:43:47, Andrew Beekhof <andrew at beekhof.net> wrote:

> > I'd love to be able to create a group called "filesystem" that
> > includes all of the file system mounts I have- and then be able to
> > create a group that includes the listener, the IP, and the filesystem
> > group- except you can't have a group of groups. And if I try to create
> > a group with the listener, the IP and the individual filesystems- then
> > I can't create another group that also includes those filesystems
> > because they're already in a group.

It's of course possible to have that filesystem group and then reference
the group in dependencies, which can simplify some setups.

> On the one hand, you say OraListener1 and OraInstance1 need to be on
> the same node, but on the other you say they can start/stop
> individually.
> 
> I hadn't read that part so closely when I said "shouldn't be too hard"
> and indeed that is hard for us to express.
> In Pacemaker, either A needs B or it doesn't.

An unordered group can achieve this, no? (I've not tested it.)

Regards,
    Lars

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