gistfile1.rb

#!/usr/bin/env ruby
# Do not edit this script from the host, it is generated by chef

require 'rubygems'
require 'aws'

$aws_id = "REDACTED"
$aws_key = "REDACTED"

AWS.config(:access_key_id => $aws_id, :secret_access_key => $aws_key, :ec2_endpoint => "ec2.amazonaws.com")

ec2 = AWS::EC2.new

backups = YAML::load(File.open('/etc/backups.yml'))

backups.each do |host|
  host["volumes"].each do |volume|
    snapshot = ec2.volumes[volume["id"]].create_snapshot("automated backup")
    name = "#{host["name"]}-#{host["env"]}-#{volume["device"]}"
    snapshot.add_tag('Name', :value => name)
    snapshot.add_tag('app', :value => host["name"])
    snapshot.add_tag('env', :value => host["env"])
    snapshot.add_tag('device', :value => volume["device"])
    if ec2.snapshots.filter("tag:Name", name).count > host["retention"]
      ec2.snapshots.filter("tag:Name", name).first.delete
    end
  end
end