----- "Thomas Bellman" <bell...@nsc.liu.se> wrote:
> 2010-09-15 16:51, R.I.Pienaar wrote:
>
> > ----- "Thomas Bellman" <bell...@nsc.liu.se> wrote:
> >
> >> define pkg($app) {
> >> $version = extlookup("pkg_${name}_${app}", "present")
> >> package { $name: ensure => $version; }
> >> }
> >>
> >> class app1 {
> >> pkg { "needed-package": app => "app1"; } # Needs version
> >> 10.17
> >> }
> >> class app2 {
> >> pkg { "needed-package": app => "app2"; } # Needs version
> >> 10.17
> >> }
> >> class app3 {
> >> pkg { "needed-package": app => "app3"; } # Needs version
> >> 10.23
> >> }
> >
> > no, you just write pkg{"needed-package": } once, and then configure
> > extlookup to give different hosts different versions.
>
> Ah, I understand.
>
> But then you instead need to maintain the mapping between which apps
> are installed on which nodes in two places: your manifest files,
> where you write include statements, and the extlookup data file. I'm not
> Marc, so I don't know his exact circumstances, but to me it sounds
> messy and not very maintainable. Unless you generate both from a common
> data source... (And for this purpose, an external nodes tool would
> probably count as "generating" the manifest.)
yeah, I agree it might not be ideal for all uses, it's just an option to
consider. I didn't read all of his thread.
Trying to model complex relationships like this with classes is a nightmare you
either need lots of inheritance that can be hard to read, debug and anticipate
or you need big if/case logic. For my example use case I'd have to make a new
2.6 class and go about editing nodes in groups doing a whole lot of potentially
error prone edits when all I really want is a short term way to do a staged
upgrade
--
You received this message because you are subscribed to the Google Groups
"Puppet Users" group.
To post to this group, send email to puppet-us...@googlegroups.com.
To unsubscribe from this group, send email to
puppet-users+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/puppet-users?hl=en.
