create, purge EBS snapshots

gistfile1.rb

require "rubygems"
require "yaml"
require "syslog"
require "aws-sdk"
 
class Snapshot
  def initialize(config_file)
    begin
      @config = YAML.load_file(config_file)
      @ec2 = AWS::EC2.new(:access_key_id => @config['access_key_id'], :secret_access_key => @config['secret_access_key'])
    rescue Exception => e
      Syslog.open('snapshot_maintenance') { |log| log.crit("Failed to load configuration file: #{e.message}") }
      exit
    end
  end
 
  def create
    @config['volumes'].each { |volume| @ec2.snapshots.create(:volume_id => volume)}
  end
 
  def purge
    @config['volumes'].each { |volume|
      @ec2.snapshots.filter('volume-id', volume).each { |snapshot|
       ((Date.today - Date.parse(snapshot.start_time.to_s)).to_i) < @config['max_age'] or snapshot.delete
      }
    }
  end
end