Puppet DNS resolution

What:

Puppet

Problem:

You need to resolve dns name inside puppet to avoid hard coding ip address.

Solution:

The simplest way of doing dns lookup inside a puppet manifest is to use inline template.

You can assign IP to a variable:

$ip_address = inline_template("<% _erbout.concat(Resolv::DNS.open.getaddress('example.com').to_s) %>")

The other way of doing it is for example using one of the puppet's resource type:

host { 'dynamic-ip':
        ensure => present,
        ip => inline_template("<% _erbout.concat(Resolv::DNS.open.getaddress('example.com').to_s) %>"),
        name => example.com,
        target => '/etc/hosts',
}

Source: 1