cron

* * * * * ec2-describe-instances | grep ^INSTANCE  | awk '{print $4}' > /etc/puppet/autosign.conf

default_node.pp

class default_node {
  package { 'apache2':
    ensure => installed
  }
  service { 'apache2':
    ensure => true,
    enable => true,
    require => Package['apache2'],
  }
}

install_master.sh

aptitude install puppetmaster
echo "127.0.0.1 puppet" >> /etc/hosts

site.pp

import "classes/*"

node default {
        include default_node
}

start_puppet.sh

#!/bin/bash

set -e -x

# Needed so that the aptitude/apt-get operations will not be interactive
export DEBIAN_FRONTEND=noninteractive

apt-get update && apt-get -y upgrade 

# Find the current IP of the puppet master and make "puppet" point to it
puppet_master_ip=$(host my_puppet_master.company.com | grep "has address" | head -1 | awk '{print $NF}')
echo $puppet_master_ip puppet >> /etc/hosts

aptitude -y install puppet 

# Enable the puppet client
sed -i /etc/default/puppet -e 's/START=no/START=yes/'

service puppet restart