Customized bootstrap to add the private IP address to /etc/network/interfaces and set up Linsides' apt-cacher proxy

custom_bootstrap.erb

bash -c '
<%= "export http_proxy=\"#{knife_config[:bootstrap_proxy]}\"" if knife_config[:bootstrap_proxy] -%>

<% private_ip = (@config[:first_boot_attributes]["ip_addresses"] || []).select{|x| x =~ /^192.168/ }.first
   if private_ip -%>
function add_private_network_and_proxy() {
  cat <<'EOP' >>/etc/network/interfaces

auto eth0:0
iface eth0:0 inet static
  address <%= private_ip %>
  netmask 255.255.128.0
EOP
  ifconfig eth0:0 <%= private_ip %> netmask 255.255.128.0 up
<% # If we're in the right datacenter, we can use the Linsides apt cache
   # see: https://linsides.com/services/aptcache/
   datacenter = { # only works in newark or dallas
     '2' => 'dallas',
     '6' => 'newark'
   }[@config[:first_boot_attributes]["linode_datacenter_id"].to_s]
   if datacenter %>
  cat >/etc/apt/apt.conf.d/01proxy <<'EOP'
Acquire::http { Proxy "http://apt-cache.<%= datacenter %>.linsides.com:3142"; };
EOP
<% end -%>
}
grep -q eth0:0 /etc/network/interfaces || add_private_network_and_proxy

<% end -%>
if [ ! -f /usr/bin/chef-client ]; then
  apt-get update
  apt-get install -y ruby ruby1.8-dev build-essential wget libruby1.8 rubygems
fi

gem update --no-rdoc --no-ri
gem install ohai --no-rdoc --no-ri --verbose
gem install chef --no-rdoc --no-ri --verbose <%= bootstrap_version_string %>

mkdir -p /etc/chef

(
cat <<'EOP'
<%= validation_key %>
EOP
) > /tmp/validation.pem
awk NF /tmp/validation.pem > /etc/chef/validation.pem
rm /tmp/validation.pem

<% if @chef_config[:encrypted_data_bag_secret] -%>
(
cat <<'EOP'
<%= encrypted_data_bag_secret %>
EOP
) > /tmp/encrypted_data_bag_secret
awk NF /tmp/encrypted_data_bag_secret > /etc/chef/encrypted_data_bag_secret
rm /tmp/encrypted_data_bag_secret
<% end -%>

(
cat <<'EOP'
<%= config_content %>
EOP
) > /etc/chef/client.rb

(
cat <<'EOP'
<%= @config[:first_boot_attributes].merge("run_list" => @run_list).to_json %>
EOP
) > /etc/chef/first-boot.json

<%= start_chef %>'