# File lib/deltacloud/drivers/ec2/ec2_driver.rb, line 207
        def instances(credentials, opts={})
          ec2 = new_client(credentials)
          inst_arr = []
          safely do
            inst_arr = ec2.describe_instances.collect do |instance|
              convert_instance(instance) if instance
            end.flatten
          end
          inst_arr = filter_on( inst_arr, :id, opts )
          filter_on( inst_arr, :state, opts )
        end