There's a host type built into puppet.
--
Brian Lalor
bla...@bravo5.org
On Aug 25, 2013, at 9:39 AM, Stefan Schmid <sc...@web.de> wrote:
> Hi
>
> I am new to puppet and need to manage host entries in file /etc/hosts as
> follows on node mail.example.com and db.example.com. I do not want to manage
> the whole file /etc/hosts with puppet, only a few entries.
>
> puppet version 3.2.1
>
> node mail.example.com, file /etc/hosts:
> (..)
> 172.16.89.96 ldapmaster.example.com ldapmaster ldap
> 172.16.89.85 sms.example.com sms sms-gateway
> (..)
>
> node db.example.com, file /etc/hosts:
> (..)
> 172.16.89.80 abc.example.com abc
> 172.16.89.81 xyz.example.com xyz bigben
> (..)
>
> In general, a node may have 0 to n host entries. The number of host entries
> on a node A may differ from the number host entries on a node B. A certain
> host entry ( IP-Address Full-Qualified-Hostname Short-Hostname)
> may be in the file /etc/hosts on 0 to n nodes concurrently.
>
> To manage the above host entries on node mail.example.com and db.example.com
> I used Ruby DSL as follows, then I learnt that Ruby DSL is deprecated. What
> is the alternative to Ruby DSL ? Any hint
> would be helpful.
>
> A puppet module using Ruby DSL:
>
> puppetmaster:/etc/puppet/modules/hosts/manifests # cat init.rb
>
> hostclass :hosts do
>
> entries = scope.lookupvar("hosts_entries")
>
> raise Puppet::ERROR,
> "hosts_entries must be a Hash" unless entries.kind_of?(Hash)
>
> entries.each do |title, parameters|
>
> host( title,
> :ensure => parameters["ensure"],
> :target => parameters["target"],
> :ip => parameters["ip"],
> :host_aliases => parameters["host_aliases"])
> end
> end
>
> puppetmaster:/etc/puppet/modules/hosts/manifests #
>
>
> Basic ENC script output for the Ruby DSL and node mail.example.com :
> (..)
> ---
> parameters:
> hosts_entries:
> sms.example.com:
> ensure: present
> target: /etc/hosts
> ip: 172.16.89.85
> host_aliases:
> - sms
> - sms-gateway
> ldapmaster.example.com:
> ensure: present
> target: /etc/hosts
> ip: 172.16.89.96
> host_aliases:
> - ldapmaster
> - ldap
> classes:
> - hosts
> (..)
>
>
> Basic ENC script output for the Ruby DSL and node db.example.com :
> (..)
> ---
> parameters:
> hosts_entries:
> abc.example.com:
> ensure: present
> target: /etc/hosts
> ip: 172.16.89.80
> host_aliases: abc
> xyz.example.com:
> ensure: present
> target: /etc/hosts
> ip: 172.16.89.81
> host_aliases:
> - xyz
> - bigben
> classes:
> - hosts
> (..)
>
>
> Thanks.
>
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