Re: [Puppet Users] node definition too big in mutualized hosting context

[Ramin K]

On 8/7/2013 6:55 AM, mezcalit...@gmail.com wrote:
Hi,
I use puppet to manage servers in a mutualized hosting context and I get
some trouble concerning the node definitions.

For example on dns nodes I have to declare many `bind::zone` resources
like this:

bind::zone { ['website1.com']:
   expire => 604800,
   minimum => 3600,
   ttl => 38400,
   …
   records => [
     'www        IN    A    xxx.xxx.xxx.xxx'
     …
         ]
}

bind::zone { ['website2.com']:
   expire => 604800,
   minimum => 3600,
   ttl => 38400,
   …
   records => [
     'www        IN    A    xxx.xxx.xxx.xxx'
     …
         ]
}

… and hundred others like this.

Finally, the file containing node definition became very big and
difficult to maintain.
I have the same issue for a webserver with apache::vhost resources for
example.

For the moment I use a workaround like this:

import vhosts/*.pp

And in each files I put a condition to make a restriction for a
particular nodes like this:

if $::fqdn =~ /^web(\d*)\.example\.net$/ {
     apache::vhost { 'website2':
     …
     }
}

I suppose that many puppet users use puppet to manage nodes in
mutualized hosting context and I would ask if someone have a better
solution for this issue?


You might consider using create_resources with hiera. Here's a simple 
example.

yaml data
---
apache::a2mods:
  expires: {}
  gnutls:  {}
  headers: {}
  rewrite: {}
apache::vhosts:
    statsstage.example.com:
        priority:   '99'
        a_template: 'apache/vhosts/stats.example.com.erb'
    stage.example.com:
        priority:   '00'

And the class the queries Hiera and pumps the data through various defines.

class profile::apache {

  include ::apache
  include logrotate::apache

  $mymods = hiera('apache::a2mods', {})
  create_resources('apache::a2mod', $mymods)

  $myvhosts = hiera('apache::vhosts', {})
  create_resources('apache::vhost', $myvhosts)

}

Ramin

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