Source code for airflow.contrib.hooks.gcp_compute_hook

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"""
This module contains a Google Compute Engine Hook.
"""

import time
from googleapiclient.discovery import build

from airflow import AirflowException
from airflow.contrib.hooks.gcp_api_base_hook import GoogleCloudBaseHook

# Time to sleep between active checks of the operation results
[docs]TIME_TO_SLEEP_IN_SECONDS = 1
[docs]class GceOperationStatus: """ Class with GCE operations statuses. """
[docs] PENDING = "PENDING"
[docs] RUNNING = "RUNNING"
[docs] DONE = "DONE"
# noinspection PyAbstractClass
[docs]class GceHook(GoogleCloudBaseHook): """ Hook for Google Compute Engine APIs. All the methods in the hook where project_id is used must be called with keyword arguments rather than positional. """
[docs] _conn = None
def __init__(self, api_version='v1', gcp_conn_id='google_cloud_default', delegate_to=None): super(GceHook, self).__init__(gcp_conn_id, delegate_to) self.api_version = api_version
[docs] def get_conn(self): """ Retrieves connection to Google Compute Engine. :return: Google Compute Engine services object :rtype: dict """ if not self._conn: http_authorized = self._authorize() self._conn = build('compute', self.api_version, http=http_authorized, cache_discovery=False) return self._conn
@GoogleCloudBaseHook.fallback_to_default_project_id
[docs] def start_instance(self, zone, resource_id, project_id=None): """ Starts an existing instance defined by project_id, zone and resource_id. Must be called with keyword arguments rather than positional. :param zone: Google Cloud Platform zone where the instance exists :type zone: str :param resource_id: Name of the Compute Engine instance resource :type resource_id: str :param project_id: Optional, Google Cloud Platform project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the GCP connection is used. :type project_id: str :return: None """ response = self.get_conn().instances().start( # pylint: disable=no-member project=project_id, zone=zone, instance=resource_id ).execute(num_retries=self.num_retries) try: operation_name = response["name"] except KeyError: raise AirflowException( "Wrong response '{}' returned - it should contain " "'name' field".format(response)) self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name, zone=zone)
@GoogleCloudBaseHook.fallback_to_default_project_id
[docs] def stop_instance(self, zone, resource_id, project_id=None): """ Stops an instance defined by project_id, zone and resource_id Must be called with keyword arguments rather than positional. :param zone: Google Cloud Platform zone where the instance exists :type zone: str :param resource_id: Name of the Compute Engine instance resource :type resource_id: str :param project_id: Optional, Google Cloud Platform project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the GCP connection is used. :type project_id: str :return: None """ response = self.get_conn().instances().stop( # pylint: disable=no-member project=project_id, zone=zone, instance=resource_id ).execute(num_retries=self.num_retries) try: operation_name = response["name"] except KeyError: raise AirflowException( "Wrong response '{}' returned - it should contain " "'name' field".format(response)) self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name, zone=zone)
@GoogleCloudBaseHook.fallback_to_default_project_id
[docs] def set_machine_type(self, zone, resource_id, body, project_id=None): """ Sets machine type of an instance defined by project_id, zone and resource_id. Must be called with keyword arguments rather than positional. :param zone: Google Cloud Platform zone where the instance exists. :type zone: str :param resource_id: Name of the Compute Engine instance resource :type resource_id: str :param body: Body required by the Compute Engine setMachineType API, as described in https://cloud.google.com/compute/docs/reference/rest/v1/instances/setMachineType :type body: dict :param project_id: Optional, Google Cloud Platform project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the GCP connection is used. :type project_id: str :return: None """ response = self._execute_set_machine_type(zone, resource_id, body, project_id) try: operation_name = response["name"] except KeyError: raise AirflowException( "Wrong response '{}' returned - it should contain " "'name' field".format(response)) self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name, zone=zone)
[docs] def _execute_set_machine_type(self, zone, resource_id, body, project_id): return self.get_conn().instances().setMachineType( # pylint: disable=no-member project=project_id, zone=zone, instance=resource_id, body=body)\ .execute(num_retries=self.num_retries)
@GoogleCloudBaseHook.fallback_to_default_project_id
[docs] def get_instance_template(self, resource_id, project_id=None): """ Retrieves instance template by project_id and resource_id. Must be called with keyword arguments rather than positional. :param resource_id: Name of the instance template :type resource_id: str :param project_id: Optional, Google Cloud Platform project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the GCP connection is used. :type project_id: str :return: Instance template representation as object according to https://cloud.google.com/compute/docs/reference/rest/v1/instanceTemplates :rtype: dict """ response = self.get_conn().instanceTemplates().get( # pylint: disable=no-member project=project_id, instanceTemplate=resource_id ).execute(num_retries=self.num_retries) return response
@GoogleCloudBaseHook.fallback_to_default_project_id
[docs] def insert_instance_template(self, body, request_id=None, project_id=None): """ Inserts instance template using body specified Must be called with keyword arguments rather than positional. :param body: Instance template representation as object according to https://cloud.google.com/compute/docs/reference/rest/v1/instanceTemplates :type body: dict :param request_id: Optional, unique request_id that you might add to achieve full idempotence (for example when client call times out repeating the request with the same request id will not create a new instance template again) It should be in UUID format as defined in RFC 4122 :type request_id: str :param project_id: Optional, Google Cloud Platform project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the GCP connection is used. :type project_id: str :return: None """ response = self.get_conn().instanceTemplates().insert( # pylint: disable=no-member project=project_id, body=body, requestId=request_id ).execute(num_retries=self.num_retries) try: operation_name = response["name"] except KeyError: raise AirflowException( "Wrong response '{}' returned - it should contain " "'name' field".format(response)) self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name)
@GoogleCloudBaseHook.fallback_to_default_project_id
[docs] def get_instance_group_manager(self, zone, resource_id, project_id=None): """ Retrieves Instance Group Manager by project_id, zone and resource_id. Must be called with keyword arguments rather than positional. :param zone: Google Cloud Platform zone where the Instance Group Manager exists :type zone: str :param resource_id: Name of the Instance Group Manager :type resource_id: str :param project_id: Optional, Google Cloud Platform project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the GCP connection is used. :type project_id: str :return: Instance group manager representation as object according to https://cloud.google.com/compute/docs/reference/rest/beta/instanceGroupManagers :rtype: dict """ response = self.get_conn().instanceGroupManagers().get( # pylint: disable=no-member project=project_id, zone=zone, instanceGroupManager=resource_id ).execute(num_retries=self.num_retries) return response
@GoogleCloudBaseHook.fallback_to_default_project_id
[docs] def patch_instance_group_manager(self, zone, resource_id, body, request_id=None, project_id=None): """ Patches Instance Group Manager with the specified body. Must be called with keyword arguments rather than positional. :param zone: Google Cloud Platform zone where the Instance Group Manager exists :type zone: str :param resource_id: Name of the Instance Group Manager :type resource_id: str :param body: Instance Group Manager representation as json-merge-patch object according to https://cloud.google.com/compute/docs/reference/rest/beta/instanceTemplates/patch :type body: dict :param request_id: Optional, unique request_id that you might add to achieve full idempotence (for example when client call times out repeating the request with the same request id will not create a new instance template again). It should be in UUID format as defined in RFC 4122 :type request_id: str :param project_id: Optional, Google Cloud Platform project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the GCP connection is used. :type project_id: str :return: None """ response = self.get_conn().instanceGroupManagers().patch( # pylint: disable=no-member project=project_id, zone=zone, instanceGroupManager=resource_id, body=body, requestId=request_id ).execute(num_retries=self.num_retries) try: operation_name = response["name"] except KeyError: raise AirflowException( "Wrong response '{}' returned - it should contain " "'name' field".format(response)) self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name, zone=zone)
[docs] def _wait_for_operation_to_complete(self, project_id, operation_name, zone=None): """ Waits for the named operation to complete - checks status of the async call. :param operation_name: name of the operation :type operation_name: str :param zone: optional region of the request (might be None for global operations) :type zone: str :return: None """ service = self.get_conn() while True: if zone is None: # noinspection PyTypeChecker operation_response = self._check_global_operation_status( service=service, operation_name=operation_name, project_id=project_id, num_retries=self.num_retries ) else: # noinspection PyTypeChecker operation_response = self._check_zone_operation_status( service, operation_name, project_id, zone, self.num_retries) if operation_response.get("status") == GceOperationStatus.DONE: error = operation_response.get("error") if error: code = operation_response.get("httpErrorStatusCode") msg = operation_response.get("httpErrorMessage") # Extracting the errors list as string and trimming square braces error_msg = str(error.get("errors"))[1:-1] raise AirflowException("{} {}: ".format(code, msg) + error_msg) break time.sleep(TIME_TO_SLEEP_IN_SECONDS)
@staticmethod
[docs] def _check_zone_operation_status(service, operation_name, project_id, zone, num_retries): return service.zoneOperations().get( project=project_id, zone=zone, operation=operation_name).execute( num_retries=num_retries)
@staticmethod
[docs] def _check_global_operation_status(service, operation_name, project_id, num_retries): return service.globalOperations().get( project=project_id, operation=operation_name).execute( num_retries=num_retries)

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