'Get the details of a service
:param  cluster: The hosting cluster
:type   cluster: :class:`libcloud.container.base.ContainerCluster`
:param  service_arn: The service ARN to describe
:type   service_arn: ``str``
:return: The service object
:rtype: ``object``'

def ex_describe_service(self, service_arn):

    request = {'services': [service_arn]}
    response = self.connection.request(ROOT, method='POST', data=json.dumps(request), headers=self._get_headers('DescribeServices')).object
    return response['services'][0]
