Issue #2716 has been reported by Robin Bowes.
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Refactor #2716: Provide some way to override puppet classes
http://projects.reductivelabs.com/issues/2716
Author: Robin Bowes
Status: Unreviewed
Priority: Normal
Assigned to:
Category: modules
Target version:
Affected version: 0.25.1rc1
Branch:
I like to try and write generic puppet modules, ie. they are standalone as much
as possible and should work in copied and pasted into another puppet
environment. However, sometimes I may want to use a generic module but override
the configuration.
I generally write my modules like this:
<pre>vsftpd
|-- files
| `-- vsftpd.conf
`-- manifests
|-- config.pp
|-- init.pp
|-- install.pp
`-- service.pp</pre>
init.pp contains sometihng like this:
<pre>class vsftpd {
require vsftpd::install, vsftpd::config, vsftpd::service
}</pre>
I had hoped that I could override classes by using modulepath like:
<pre>site/modules:generic/modules</pre>
I would put my generic modules in the generic/modules tree and over-ride
specific class by putting them in the site/modules tree.
So, I created a vsftpd tree (as above) in generic/modules and created the
following tree in site/modules:
<pre>vsftpd
`-- manifests
`-- config.pp</pre>
I also added a module for my test node:
<pre>node
`-- manifests
`-- a001.pp</pre>
a001.pp contains:
<pre>class node::a001 {
include vsftpd
}</pre>
When I run puppetd --test on node a001, I get this error:
<pre># puppetd --test
info: Retrieving plugin
err: Could not retrieve catalog from remote server: Error 400 on SERVER: Could
not find class vsftpd in namespaces node::a001 at
/etc/puppet/site/modules/node/manifests/a001.pp:3 on node
a001.private.statcounter.com
warning: Not using cache on failed catalog
err: Could not retrieve catalog; skipping run</pre>
It seems that puppet is finding site/modules/vsftpd and assuming that the
vsftpd class is in site/modules/vsftpd/manifests/init.pp, which of course it
isn't.
I suggest that puppet should look for <modulename>/manifests/init.pp (not just
<modulename>) in each element of $modulepath before deciding that it can't find
<modulename>. This would allow classes to be over-ridden.
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