puppet-gai

Manage /etc/gai.conf with Puppet.

RFC 3484 provides an algorithm to sort the result of a call to getaddrinfo(3) when multiple answers are returned. Especially for hosts connected to an IPv4 and an IPv6 network it might be necessary to modify these static rules. For Linux using the glibc implementation this can be done with the /etc/gai.conf configuration file.

Usage

Create an empty configuration enforcing the default rules

class { 'gai': }

Modify the precedence rules to prefer IPv4 addresses

class { 'gai':
  precedence        => {
    '::/96'         => '20',
    '2002::/16'     => '30',
    '::/0'          => '40',
    '::1/128'       => '50',
    '::ffff:0:0/96' => '100',
  }
}

There is also a builtin class to achieve this:

class { 'gai::preferipv4': }