ruby code with AWS-graph.

protected
    def load(yml)
      @config = YAML.load_file(yml)
      @ec2 = AWS::EC2.new(
                          :access_key_id => @config['aws_access_key_id'],
                          :secret_access_key => @config['aws_secret_access_key'],
                          :region => @config['aws_region'],
                          )
      @rds = AWS::RDS.new(
                          :access_key_id => @config['aws_access_key_id'],
                          :secret_access_key => @config['aws_secret_access_key'],
                          :region => @config['aws_region'],
                          )
      @elb = AWS::ELB.new(
                          :access_key_id => @config['aws_access_key_id'],
                          :secret_access_key => @config['aws_secret_access_key'],
                          :region => @config['aws_region'],
                          )
    end