Source code for airflow.providers.google.cloud.hooks.compute

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

import time
from typing import Any, Dict, Optional, Sequence, Union

from googleapiclient.discovery import build

from airflow.exceptions import AirflowException
from airflow.providers.google.common.hooks.base_google import GoogleBaseHook

# 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"
[docs]class ComputeEngineHook(GoogleBaseHook): """ 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. """ def __init__( self, api_version: str = 'v1', gcp_conn_id: str = 'google_cloud_default', delegate_to: Optional[str] = None, impersonation_chain: Optional[Union[str, Sequence[str]]] = None, ) -> None: super().__init__( gcp_conn_id=gcp_conn_id, delegate_to=delegate_to, impersonation_chain=impersonation_chain, ) self.api_version = api_version _conn: Optional[Any] = None
[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
@GoogleBaseHook.fallback_to_default_project_id
[docs] def start_instance(self, zone: str, resource_id: str, project_id: str) -> 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 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 project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the Google Cloud connection is used. :type project_id: str :return: None """ response = ( self.get_conn() .instances() .start(project=project_id, zone=zone, instance=resource_id) .execute(num_retries=self.num_retries) ) try: operation_name = response["name"] except KeyError: raise AirflowException(f"Wrong response '{response}' returned - it should contain 'name' field") self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name, zone=zone)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def stop_instance(self, zone: str, resource_id: str, project_id: str) -> 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 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 project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the Google Cloud connection is used. :type project_id: str :return: None """ response = ( self.get_conn() .instances() .stop(project=project_id, zone=zone, instance=resource_id) .execute(num_retries=self.num_retries) ) try: operation_name = response["name"] except KeyError: raise AirflowException(f"Wrong response '{response}' returned - it should contain 'name' field") self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name, zone=zone)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def set_machine_type(self, zone: str, resource_id: str, body: dict, project_id: str) -> 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 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 project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the Google Cloud 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(f"Wrong response '{response}' returned - it should contain 'name' field") self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name, zone=zone)
def _execute_set_machine_type(self, zone: str, resource_id: str, body: dict, project_id: str) -> dict: return ( self.get_conn() .instances() .setMachineType(project=project_id, zone=zone, instance=resource_id, body=body) .execute(num_retries=self.num_retries) ) @GoogleBaseHook.fallback_to_default_project_id
[docs] def get_instance_template(self, resource_id: str, project_id: str) -> dict: """ 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 project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the Google Cloud 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(project=project_id, instanceTemplate=resource_id) .execute(num_retries=self.num_retries) ) return response
@GoogleBaseHook.fallback_to_default_project_id
[docs] def insert_instance_template( self, body: dict, project_id: str, request_id: Optional[str] = None, ) -> 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 project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the Google Cloud connection is used. :type project_id: str :return: None """ response = ( self.get_conn() .instanceTemplates() .insert(project=project_id, body=body, requestId=request_id) .execute(num_retries=self.num_retries) ) try: operation_name = response["name"] except KeyError: raise AirflowException(f"Wrong response '{response}' returned - it should contain 'name' field") self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def get_instance_group_manager( self, zone: str, resource_id: str, project_id: str, ) -> dict: """ Retrieves Instance Group Manager by project_id, zone and resource_id. Must be called with keyword arguments rather than positional. :param zone: Google Cloud 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 project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the Google Cloud 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(project=project_id, zone=zone, instanceGroupManager=resource_id) .execute(num_retries=self.num_retries) ) return response
@GoogleBaseHook.fallback_to_default_project_id
[docs] def patch_instance_group_manager( self, zone: str, resource_id: str, body: dict, project_id: str, request_id: Optional[str] = None, ) -> None: """ Patches Instance Group Manager with the specified body. Must be called with keyword arguments rather than positional. :param zone: Google Cloud 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 project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the Google Cloud connection is used. :type project_id: str :return: None """ response = ( self.get_conn() .instanceGroupManagers() .patch( 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(f"Wrong response '{response}' returned - it should contain 'name' field") self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name, zone=zone)
def _wait_for_operation_to_complete( self, project_id: str, operation_name: str, zone: Optional[str] = None ) -> 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: operation_response = self._check_global_operation_status( service=service, operation_name=operation_name, project_id=project_id, num_retries=self.num_retries, ) else: 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(f"{code} {msg}: " + error_msg) break time.sleep(TIME_TO_SLEEP_IN_SECONDS) @staticmethod def _check_zone_operation_status( service: Any, operation_name: str, project_id: str, zone: str, num_retries: int ) -> dict: return ( service.zoneOperations() .get(project=project_id, zone=zone, operation=operation_name) .execute(num_retries=num_retries) ) @staticmethod def _check_global_operation_status( service: Any, operation_name: str, project_id: str, num_retries: int ) -> dict: return ( service.globalOperations() .get(project=project_id, operation=operation_name) .execute(num_retries=num_retries) ) @GoogleBaseHook.fallback_to_default_project_id
[docs] def get_instance_info(self, zone: str, resource_id: str, project_id: str) -> Dict[str, Any]: """ Gets instance information. :param zone: Google Cloud 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 project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the Google Cloud connection is used. :type project_id: str """ instance_info = ( self.get_conn() .instances() .get(project=project_id, instance=resource_id, zone=zone) .execute(num_retries=self.num_retries) ) return instance_info
@GoogleBaseHook.fallback_to_default_project_id
[docs] def get_instance_address( self, zone: str, resource_id: str, project_id: str, use_internal_ip: bool = False ) -> str: """ Return network address associated to instance. :param zone: Google Cloud 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 project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the Google Cloud connection is used. :type project_id: str :param use_internal_ip: If true, return private IP address. :type use_internal_ip: bool """ instance_info = self.get_instance_info(project_id=project_id, resource_id=resource_id, zone=zone) if use_internal_ip: return instance_info["networkInterfaces"][0].get("networkIP") access_config = instance_info.get("networkInterfaces")[0].get("accessConfigs") if access_config: return access_config[0].get("natIP") raise AirflowException("The target instance does not have external IP")
@GoogleBaseHook.fallback_to_default_project_id
[docs] def set_instance_metadata( self, zone: str, resource_id: str, metadata: Dict[str, str], project_id: str ) -> None: """ Set instance metadata. :param zone: Google Cloud zone where the Instance Group Manager exists :type zone: str :param resource_id: Name of the Instance Group Manager :type resource_id: str :param metadata: The new instance metadata. :type metadata: Dict :param project_id: Optional, Google Cloud project ID where the Compute Engine Instance exists. If set to None or missing, the default project_id from the Google Cloud connection is used. :type project_id: str """ response = ( self.get_conn() .instances() .setMetadata(project=project_id, zone=zone, instance=resource_id, body=metadata) .execute(num_retries=self.num_retries) ) operation_name = response["name"] self._wait_for_operation_to_complete(project_id=project_id, operation_name=operation_name, zone=zone)

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