Puppet DNS lookup

From time to time NetworkManager breaks my /etc/resolv.conf. I normally turn that off using puppet but when /etc/resolv.conf is broken, puppet won't run so I have to fix it manually :-(

Well, not any more. Now I add a static /etc/hosts entry for the puppet server and puppet will run even when /etc/resolv.conf is broken.

The special part about this is that I look up the IP address using a template so I don't have to hard code the value in my manifest. Google said it could not be done without writing a custom function. As always, I did not believe it...

Assuming you have set $puppetserver to contain the fqdn of your puppet server:

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