Puppet users - Jun 2012 - Discover a value for an object

I''m doing some funky things to have some shared user accounts realize
SSH
keys of authorised users.

To cut a long story short, everything basically works, except there''s a
case where I need to discover the home directory path of a user that has 
been previously created.

I had originally had an inline template:
  $home = inline_template("<%=
Etc::getpwnam(''${user}'')[''dir''] %>")
but I then realised that this won''t work because it''s
obviously evaluated
on the server.

My question is, can I lookup a value from an existing object in a similar 
way to this:

$andy_home = $::role ? {
  special_case => ''/andy'',
  default      => ''/home/andy'',
}

user { ''andy'':
  home => $andy_home,
}

$user_home = User[''andy''][''home'']
notice("Andy''s home directory is: $user_home")

cheers,

Andy

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On Thursday, June 14, 2012 8:31:23 AM UTC-5, Andy Botting
wrote:
>
> My question is, can I lookup a value from an existing object in a similar 
> way to this:
>
> $andy_home = $::role ? {
>   special_case => ''/andy'',
>   default      => ''/home/andy'',
> }
>
> user { ''andy'':
>   home => $andy_home,
> }
>
> $user_home = User[''andy''][''home'']
> notice("Andy''s home directory is: $user_home")
>
 
No, you cannot.

Custom facts are the standard mechanism for dynamically providing node 
information to the master for use in catalog compilation.  If you need 
homedir locations only for specific, known users then you could create 
custom facts for those homedirs.  Actually, you could probably persuade 
facter to generate such custom facts for all system users, but I would not 
recommend that if any of your managed systems have very many users (even 
systems that do not require this treatment).  

Alternatively, if the homedirs are computable then you could rely on that 
(i.e. $user = ''andy''; $user_home = "/home/${user}").

If none of that suffices then you need to tabulate the homedir locations 
you need.  Hiera might provide a good way for you to load the resulting 
data into Puppet.


John

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