Puppet users - Nov 2011 - All nodes inherits default except for one module

Hi

I have been searching around but must give up on this one.

I have bunch of servers which all uses the same modules except for one
single module. In the worst case I have n modules and n nodes and each
one of them should not include one different module.

Example: all need resolv.conf but the nameserver should be a little
different.

node default {
 include resolv.conf
        resolv_conf { $domainname:
                domainname  => $domainname,
                searchpath  => $searchpath,
                nameservers => $nameservers
        }
 ...
}

node ''nameserver'' inherits default {
  uninclude resolv.conf
  ...
}


Example2: All should do rsyslog, except the syslog-server.

What is the best practice for this?

best regards
Hans Schou

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Hi,

You might want to try something like:

node default {
  if $hostname != ''nameserver'' {
    include resolve.conf
  }
  if....
  else....
  elsif....
}

See:
http://docs.puppetlabs.com/guides/language_guide.html#conditionals

Den

On 24/11/2011, at 21:17, Hans Schou <hans@moc.net> wrote:
> Hi
> 
> I have been searching around but must give up on this one.
> 
> I have bunch of servers which all uses the same modules except for one
> single module. In the worst case I have n modules and n nodes and each
> one of them should not include one different module.
> 
> Example: all need resolv.conf but the nameserver should be a little
> different.
> 
> node default {
> include resolv.conf
>        resolv_conf { $domainname:
>                domainname  => $domainname,
>                searchpath  => $searchpath,
>                nameservers => $nameservers
>        }
> ...
> }
> 
> node ''nameserver'' inherits default {
>  uninclude resolv.conf
>  ...
> }
> 
> 
> Example2: All should do rsyslog, except the syslog-server.
> 
> What is the best practice for this?
> 
> best regards
> Hans Schou
> 
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> 
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On Nov 24, 5:07 am, Denmat <tu2bg...@gmail.com>
wrote:
> Hi,
>
> You might want to try something like:
>
> node default {
>   if $hostname != ''nameserver'' {
>     include resolve.conf
>   }
>   if....
>   else....
>   elsif....
>
> }
>
> See:http://docs.puppetlabs.com/guides/language_guide.html#conditionals
>
> Den

Or make your classes smarter, either by
1) putting the needed conditional logic there, or
2) having them use external data via extlookup() or hiera.

Or use class inheritance to create a class that overrides the needed
properties.  Such a class can be included on the node(s) that needs to
be different, regardless of whether its parent class is also included
(not compatible with parameterized parent classes).


John

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Den 2011-11-24 12:07, Denmat skrev:
> Hi,
>
> You might want to try something like:
>
> node default {
>    if $hostname != ''nameserver'' {
>      include resolve.conf
>    }
Thanks. It is also quite easy to get an overview of which modules one 
server gets
   1. Look at the particular node
   2. Look at the default node


-- 
Venlig hilsen
Hans Schou
tel:46923438

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