def _process_received_request(self, scaling_request, fail_count=0):
scaling_success = False
created_service_instance = None
self._logger.info("Received request: %s", scaling_request)
try:
if scaling_request.command == DynamiteScalingCommand.SCALE_UP:
service_name = scaling_request.service_name
created_service_instance = self._dynamite_service_handler.add_new_fleet_service_instance(service_name)
elif scaling_request.command == DynamiteScalingCommand.SCALE_DOWN:
service_name = scaling_request.service_name
service_instance_name = scaling_request.service_instance_name
self._dynamite_service_handler.remove_fleet_service_instance(service_name, service_instance_name)
scaling_success = True
except FleetSubmissionError as fse:
self._logger.error("Submitting fleet file failed!")
raise FleetSubmissionError("Submission error on unit: {}" + service_name) from fse
except FleetStartError as fse:
self._logger.error("Starting fleet service failed!")
if created_service_instance is not None:
self._unload_unit(created_service_instance)
raise FleetStartError ("Unit start error on unit: {}" + service_name) from fse
except FleetDestroyError as fde:
self._logger.error("Destroying fleet service failed!")
raise FleetDestroyError ("Failed destroying unit: {}" + service_name) from fde
except FleetCommunicationError as fce:
self._logger.error("Communication with fleet failed!")
raise FleetCommunicationError("Fleet communication error working on unit: {}" + service_name) from fce
except:
self._logger.exception("Unexpected error")
scaling_response = DynamiteScalingResponse.from_scaling_request(scaling_request, scaling_success)
self._scaling_response_sender.send_response(scaling_response)
scaling_response.message_processed()
def test_from_scaling_request(self):
scaling_request = DynamiteScalingRequest()
scaling_request.command = DynamiteScalingCommand.SCALE_DOWN
scaling_request.failure_counter = 4
scaling_request.service_instance_name = "apache_service_instance_name"
scaling_request.service_name = "apache_service_name"
scaling_response = DynamiteScalingResponse.from_scaling_request(scaling_request, True)
assert scaling_response.command == scaling_request.command
assert scaling_response.service_instance_name == scaling_request.service_instance_name
assert scaling_response.service_name == scaling_request.service_name
assert scaling_response.failure_counter == scaling_request.failure_counter
assert scaling_response.success is True
def test_from_scaling_request(self):
scaling_request = DynamiteScalingRequest()
scaling_request.command = DynamiteScalingCommand.SCALE_DOWN
scaling_request.failure_counter = 4
scaling_request.service_instance_name = "apache_service_instance_name"
scaling_request.service_name = "apache_service_name"
scaling_response = DynamiteScalingResponse.from_scaling_request(
scaling_request, True)
assert scaling_response.command == scaling_request.command
assert scaling_response.service_instance_name == scaling_request.service_instance_name
assert scaling_response.service_name == scaling_request.service_name
assert scaling_response.failure_counter == scaling_request.failure_counter
assert scaling_response.success is True
def _process_received_request(self, scaling_request, fail_count=0):
scaling_success = False
created_service_instance = None
try:
if scaling_request.command == DynamiteScalingCommand.SCALE_UP:
service_name = scaling_request.service_name
created_service_instance = self._dynamite_service_handler.add_new_fleet_service_instance(service_name)
elif scaling_request.command == DynamiteScalingCommand.SCALE_DOWN:
service_name = scaling_request.service_name
service_instance_name = scaling_request.service_instance_name
self._dynamite_service_handler.remove_fleet_service_instance(service_name, service_instance_name)
scaling_success = True
except FleetSubmissionError:
self._logger.exception("Submitting fleet file failed!")
retry_success = self._retry_processing_request(scaling_request, fail_count)
if retry_success:
return
except FleetStartError:
self._logger.exception("Starting fleet service failed!")
if created_service_instance is not None:
self._unload_unit(created_service_instance)
retry_success = self._retry_processing_request(scaling_request, fail_count)
if retry_success:
return
except FleetDestroyError:
self._logger.exception("Destroying fleet service failed!")
retry_success = self._retry_processing_request(scaling_request, fail_count)
if retry_success:
return
except FleetCommunicationError:
self._logger.exception("Communication with fleet failed!")
scaling_response = DynamiteScalingResponse.from_scaling_request(scaling_request, scaling_success)
self._scaling_response_sender.send_response(scaling_response)
scaling_response.message_processed()
