Puppet users - Apr 2013 - How to reference a class in site.pp without creating a module?

Hi,

Trying to get some understanding on how code should be structured in 
Puppet. I have a class oracle_java defined to deploy the Java virtual 
machine on the agents  (basically copy of 
http://log.scalemotion.com/2013/04/oracle-java-under-linux-with-puppet.html). 
It works fine if i copy the body of the class (omitting the class 
declaration) within site.pp. But that''s no way to do business as you
may
presume.

Now, I put the class under /etc/puppet/manifests/jdk.pp and change site.pp 
into:

node default{
  include jdk
}

Unfortunately, this doesn''t work. I keep getting the following error 
message from the agent:

Could not retrieve catalog from remote server: Error 400 on SERVER: Could 
not find class jdk for 
ec2-52-221-193-75.compute-1.amazonaws.com-c1421f15-ac06-c6ab-6b5d-95f238bf27c7.

Is there a way to reference a class in site.pp without creating a module?

Thanks,
Max.

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You will need to import your jdk class file in site.pp

Something like this:

import "jdk.pp"

At the top of site.pp

Cheers,
Josh

On Sunday, April 21, 2013 9:18:36 AM UTC-4, max.bri...@gmail.com
wrote:
>
> Hi,
>
> Trying to get some understanding on how code should be structured in 
> Puppet. I have a class oracle_java defined to deploy the Java virtual 
> machine on the agents  (basically copy of 
>
http://log.scalemotion.com/2013/04/oracle-java-under-linux-with-puppet.html).
> It works fine if i copy the body of the class (omitting the class 
> declaration) within site.pp. But that''s no way to do business as
you may
> presume.
>
> Now, I put the class under /etc/puppet/manifests/jdk.pp and change site.pp 
> into:
>
> node default{
>   include jdk
> }
>
> Unfortunately, this doesn''t work. I keep getting the following
error
> message from the agent:
>
> Could not retrieve catalog from remote server: Error 400 on SERVER: Could 
> not find class jdk for 
>
ec2-52-221-193-75.compute-1.amazonaws.com-c1421f15-ac06-c6ab-6b5d-95f238bf27c7.
>
> Is there a way to reference a class in site.pp without creating a module?
>
> Thanks,
> Max.
>
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Hi Max,

Making the module directory structure is pretty easy and will serve you well as
you develop your manifest.

mkdir -p /etc/puppet/manifests/jdk/manifests

Then copy your jdk class into init.pp in that new directory.

Alternatively you can add the import clause into site.pp to find your jdk class.

import ''*.pp''

That will tell puppet to import any .pp file in the same directory as site.pp.

Regards,
Den

On 21/04/2013, at 23:18, max.bridgewater@gmail.com wrote:
> Hi,
> 
> Trying to get some understanding on how code should be structured in
Puppet. I have a class oracle_java defined to deploy the Java virtual machine on
the agents  (basically copy of
http://log.scalemotion.com/2013/04/oracle-java-under-linux-with-puppet.html). It
works fine if i copy the body of the class (omitting the class declaration)
within site.pp. But that''s no way to do business as you may presume.
> 
> Now, I put the class under /etc/puppet/manifests/jdk.pp and change site.pp
into:
> 
> node default{
>   include jdk
> }
> 
> Unfortunately, this doesn''t work. I keep getting the following
error message from the agent:
> 
> Could not retrieve catalog from remote server: Error 400 on SERVER: Could
not find class jdk for
ec2-52-221-193-75.compute-1.amazonaws.com-c1421f15-ac06-c6ab-6b5d-95f238bf27c7.
> 
> Is there a way to reference a class in site.pp without creating a module?
> 
> Thanks,
> Max.
> -- 
> You received this message because you are subscribed to the Google Groups
"Puppet Users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
email to puppet-users+unsubscribe@googlegroups.com.
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> Visit this group at http://groups.google.com/group/puppet-users?hl=en.
> For more options, visit https://groups.google.com/groups/opt_out.
>  
>  
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On Sunday, April 21, 2013 8:18:36 AM UTC-5, max.bri...@gmail.com
wrote:
>
> Hi,
>
> Trying to get some understanding on how code should be structured in 
> Puppet. I have a class oracle_java defined to deploy the Java virtual 
> machine on the agents  (basically copy of 
>
http://log.scalemotion.com/2013/04/oracle-java-under-linux-with-puppet.html).
> It works fine if i copy the body of the class (omitting the class 
> declaration) within site.pp. But that''s no way to do business as
you may
> presume.
>
>
No, no way to do business at all.

 
> Now, I put the class under /etc/puppet/manifests/jdk.pp and change site.pp 
> into:
>
> node default{
>   include jdk
> }
>
> Unfortunately, this doesn''t work. I keep getting the following
error
> message from the agent:
>
> Could not retrieve catalog from remote server: Error 400 on SERVER: Could 
> not find class jdk for 
>
ec2-52-221-193-75.compute-1.amazonaws.com-c1421f15-ac06-c6ab-6b5d-95f238bf27c7.
>

The ''include'' function operates on class names, not file
names.  Unless you
have renamed the class, you should be writing "include
''oracle_java''".

In light of that, it should be clear that the issue is largely one of 
instructing Puppet where to find the definition of the class you want to 
declare.  There are three ways to do that:

   1. put the whole class definition (not just the body) in site.pp;
   2. ''import'' the class''s manifest *file* into
site.pp; or
   3. correctly put the class into a module so that Puppet can find its 
   manifest automatically.


> Is there a way to reference a class in site.pp without creating a module?
>
>
Why don''t you want to create a module?  It''s the right thing
to do.

The other respondents have covered ''import'', which is the
direct answer to
your question.  But don''t do that.  Creating a module is very simple --
it''s basically just a matter of creating a couple of directories. 
Putting
your class into a module is mostly a matter of putting its file in the 
right place, with the right name.  To create a one-class module containing 
your particular class, simply move /etc/puppet/manifests/jdk.pp to 
/etc/puppet/modules/oracle_java/manifests/init.pp.  Done.

There''s room for refinement, however.  Your class references a file
whose
source it assumes can be found on the master, in /etc/puppet/files/.  It 
can continue to do so, but it would be far better to move the source file 
into the module, too, so that the whole is, um, modular.  To do that, move 
/etc/puppet/files/jdk-7u17-linux-x64.tar.gz to 
/etc/puppet/module/oracle_java/files/jdk-7u17-linux-x64.tar.gz, and change 
the line ''source  =>
"puppet:///files/${file_name}",'' to ''source  =>
"puppet:///modules/oracle_java/${file_name}",''.

There are further improvements that could be considered, but they go well 
beyond the scope of your question.  You may need a bit more experience with 
Puppet before you are prepared look into such things.


John

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Thanks lot guys. Really appreciate your help. I got started using modules.

On Sunday, April 21, 2013 9:18:36 AM UTC-4, max.bri...@gmail.com
wrote:
>
> Hi,
>
> Trying to get some understanding on how code should be structured in 
> Puppet. I have a class oracle_java defined to deploy the Java virtual 
> machine on the agents  (basically copy of 
>
http://log.scalemotion.com/2013/04/oracle-java-under-linux-with-puppet.html).
> It works fine if i copy the body of the class (omitting the class 
> declaration) within site.pp. But that''s no way to do business as
you may
> presume.
>
> Now, I put the class under /etc/puppet/manifests/jdk.pp and change site.pp 
> into:
>
> node default{
>   include jdk
> }
>
> Unfortunately, this doesn''t work. I keep getting the following
error
> message from the agent:
>
> Could not retrieve catalog from remote server: Error 400 on SERVER: Could 
> not find class jdk for 
>
ec2-52-221-193-75.compute-1.amazonaws.com-c1421f15-ac06-c6ab-6b5d-95f238bf27c7.
>
> Is there a way to reference a class in site.pp without creating a module?
>
> Thanks,
> Max.
>
-- 
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