Puppet users - Jul 2013 - Inheriting variables from supernode into lower nodes

Hi Guys,

I''d like to have some default values which are used in templates to be 
inherited from the basenode hosts.
I tried, but I can''t get it to work. This is my setup:


Currently, I''m trying to do something like this:

node basenode {
         include ntp
         include postfix
         include denyhosts
         include ssh
         include nrpe
         <et cetera>

}
in my node definition file.
Then I do:

import "internal-nodes"

in the same file.

Then in internal-nodes.pp :

node ''internal-node'' inherits basenode {
         $internalIP = true
}

node ''vpn.XXX.nl'' inherits internal-node {
}

The internalIP variable is being used in templates for the vpn.xxx.nl 
host, but it doesn''t seem to get set properly.
The code in the ERB template:


<% if $internalIP == true %>
foo
<% else %>
bar
<% end %>


This will just not work. How can I get this to work properly, I''d love 
to set the internalIP variable *just* in the  ''internal-node''
class, and
NOT in every internal client.


Cheers,

Boudewijn

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Node inheritance does not work like class inheritance.

http://docs.puppetlabs.com/puppet/3/reference/lang_node_definitions.html#inheritance
"Nodes can inherit from other nodes using the inherits keyword. Inheritance
works identically to class inheritance. This feature is not recommended; see the
aside below.”

https://ask.puppetlabs.com/question/395/why-is-inheritance-frowned-upon/
https://groups.google.com/forum/#!topic/puppet-users/7OQPA9iKimM  (Best
Practices on node declaration)

http://docs.puppetlabs.com/hiera/1/puppet.html#assigning-classes-to-nodes-with-hiera-hierainclude
"You can use Hiera to assign classes to nodes with the special
hiera_include function. This lets you assign classes in great detail without
repeating yourself — it’s essentially what people have traditionally tried and
failed to use node inheritance for.”

And some food for thought: http://www.craigdunn.org/2012/05/239/ (Designing
Puppet – Roles and Profiles)

On Jul 1, 2013, at 5:09 PM, Boudewijn Ector wrote:
> Hi Guys,
> 
> I''d like to have some default values which are used in templates
to be inherited from the basenode hosts.
> I tried, but I can''t get it to work. This is my setup:
> 
> 
> Currently, I''m trying to do something like this:
> 
> node basenode {
>        include ntp
>        include postfix
>        include denyhosts
>        include ssh
>        include nrpe
>        <et cetera>
> 
> }
> in my node definition file.
> Then I do:
> 
> import "internal-nodes"
> 
> in the same file.
> 
> Then in internal-nodes.pp :
> 
> node ''internal-node'' inherits basenode {
>        $internalIP = true
> }
> 
> node ''vpn.XXX.nl'' inherits internal-node {
> }
> 
> The internalIP variable is being used in templates for the vpn.xxx.nl host,
but it doesn''t seem to get set properly.
> The code in the ERB template:
> 
> 
> <% if $internalIP == true %>
> foo
> <% else %>
> bar
> <% end %>
> 
> 
> This will just not work. How can I get this to work properly, I''d
love to set the internalIP variable *just* in the 
''internal-node'' class, and NOT in every internal client.
> 
> 
> Cheers,
> 
> Boudewijn
> 
> -- 
> 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.
> To post to this group, send email to puppet-users@googlegroups.com.
> Visit this group at http://groups.google.com/group/puppet-users.
> For more options, visit https://groups.google.com/groups/opt_out.
> 
> 
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