On Thu, Oct 11, 2012 at 8:32 AM, Mohit Chawla <mohit.chawla.bin...@gmail.com
> wrote:
> Hello,
>
> On Thu, Oct 11, 2012 at 8:39 PM, Jeff McCune <j...@puppetlabs.com> wrote:
> > Yes, this is a perfect example of when to employ the anchor pattern. It's
> > also a perfect example of the bug we need to fix in puppet.
> >
> > Class foo, bar, an baz will "float off" in the relationship graph because
> > class wrapper contains no other resources to "anchor" them down.
> >
> > If you add a begin an end anchor resources to class wrapper and establish
> > relationships between them and the three contained classes, it should
> work
> > as you expect
> >
> > I will give a concrete example, if you wish, once I get to my desk.
> >
>
> Thank you for the response, an example for the wrapper class would
> indeed be nice.
>
> And although this might be a difficult question to give a generalized
> (or rather, a slightly less technical) answer, but this behaviour of
> floating off of the graph, is it easy to attribute this to particular
> scenarios ? For example, as you noticed in the previous replies - Luke
> suggested this for nested classes, while llowder thought this was a
> perfect example, as so you ! :)
>
> Also, @Luke, your suggestion to be explicit about the relationships like
> so:
> class wrapper {
> include foo
> include bar
> class["foo"]->Class["wrapper"]
> class["bar"]->Class["wrapper"]
> }
>
> node x {
> include someclass
> include wrapper
> class["someclass"]->Class["wrapper"]
> }
>
> ... didn't work. "someclass" was still applied after the wrapper
> class's classes.
Here's how I'd do it:
class wrapper {
anchor { 'wrapper::begin': }
anchor { 'wrapper::end':
require => Anchor['wrapper::begin'],
}
# Note, foo, bar, baz still do not have relationships between one another.
class { foo:
require => Anchor['wrapper::begin'],
before => Anchor['wrapper::end'],
}
class { bar:
require => Anchor['wrapper::begin'],
before => Anchor['wrapper::end'],
}
class { baz:
require => Anchor['wrapper::begin'],
before => Anchor['wrapper::end'],
}
}
And a node like:
node x {
include someclass
include wrapper
Class["someclass"]->Class["wrapper"]
}
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