AWS Route53 Hostname manipulation Chef Cookbook (needs more time and tests but is working as desired with VPC)

attributes.default.rb

# cluster identifier
default[:route53][:zone] = "my.default-domain.com"

dhcclient.conf.erb

interface "eth0" {
        supersede host-name "<%= node['hostname'] %>";
        supersede domain-name "<%= node['route53']['zone'] %> ec2.internal";

}

ec2-name.erb

#!/bin/bash

#
# /etc/sudoers
#
# Generated by Chef for <%= node[:fqdn] %>
#
. /etc/profile.d/aws-apitools-common.sh

export PATH=/opt/aws/bin:$PATH

ec2-describe-tags -O $AWS_ACCESS_KEY_ID -W $AWS_SECRET_ACCESS_KEY \
--filter "resource-id=${1}" \
--filter "resource-type=instance" --filter "key=Name" | cut -f5

recipe.default.rb

#
# Cookbook Name:: aws_base
# Recipe:: default
#
# Copyright 2012, zircote
#
# All rights reserved - Do Not Redistribute
#
unless node['ec2']['instance_id'].to_s.strip.length == 0
  aws = data_bag_item("aws", "route53")
  if node['ec2']['public_hostname'].to_s.strip.length == 0
    cname =node['ec2']['local_ipv4']
  else
    cname = node['ec2']['public_hostname']
  end

  execute "install_pip" do
    command <<-EOF
    if ! which cli53; then
      sudo easy_install -U pip
      sudo pip install -U cli53
    fi
    EOF
  end

  template "/usr/bin/ec2-name" do
    source "ec2-name.erb"
    owner "root"
    group "root"
    mode 0755
    variables(
        {:aws => aws}
    )
  end

  service "network" do
    supports :status => true, :restart => true, :reload => true
    action :nothing
  end

  template "/etc/dhcp/dhclient.conf" do
    source "dhclient.conf.erb"
    owner "root"
    group "root"
    mode 0644
    variables({
                  :hostname => node[:hostname]
              })
    notifies :restart, resources(:service => "network"), :immediately
    action :nothing
  end

  ruby_block "set and fetch hostnames" do
    block do
      command = <<-EOF
        export AWS_ACCESS_KEY_ID=#{aws['aws_access_key_id']}
        export AWS_SECRET_ACCESS_KEY=#{aws['aws_secret_access_key']}
        /usr/bin/ec2-name #{node[:ec2][:instance_id]}
      EOF
      hostname = `#{command}`.sub('.' + node['route53']['zone'], '').to_s.strip()
      if hostname.length == 0
          hostname = node[:ec2][:instance_id1]
      end
      node.automatic_attrs[:hostname] = hostname
      node.automatic_attrs[:fqdn] = "#{node['hostname']}.#{node['route53']['zone']}"
      record_type = 'A'
      unless /^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/.match(cname)
        record_type = 'CNAME'
      end
      shell=<<-EOF
      export AWS_ACCESS_KEY_ID=#{aws['aws_access_key_id']}
      export AWS_SECRET_ACCESS_KEY=#{aws['aws_secret_access_key']}
      echo "127.0.0.1 #{node['fqdn']} #{node['hostname']} localhost" > /etc/hosts
      echo "#{node['hostname']}" > /etc/hostname
      hostname --file /etc/hostname
      cli53 rrcreate -x 600 -r #{node['route53']['zone']} #{node['hostname']} #{record_type} #{cname}
      EOF
      unless /Success/.match(`#{shell}`)
        Chef::Log.info("Failed to set Hostname")
      end
    end
    notifies :create, resources(:template => "/etc/dhcp/dhclient.conf"), :immediately
  end

end