Source code for airflow.executors.celery_kubernetes_executor

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from typing import Dict, List, Optional, Set, Union

from airflow.configuration import conf
from airflow.executors.base_executor import CommandType, EventBufferValueType, QueuedTaskInstanceType
from airflow.executors.celery_executor import CeleryExecutor
from airflow.executors.kubernetes_executor import KubernetesExecutor
from airflow.models.taskinstance import SimpleTaskInstance, TaskInstance, TaskInstanceKey
from airflow.utils.log.logging_mixin import LoggingMixin

[docs]class CeleryKubernetesExecutor(LoggingMixin): """ CeleryKubernetesExecutor consists of CeleryExecutor and KubernetesExecutor. It chooses an executor to use based on the queue defined on the task. When the queue is the value of ``kubernetes_queue`` in section ``[celery_kubernetes_executor]`` of the configuration (default value: `kubernetes`), KubernetesExecutor is selected to run the task, otherwise, CeleryExecutor is used. """
[docs] KUBERNETES_QUEUE = conf.get('celery_kubernetes_executor', 'kubernetes_queue')
def __init__(self, celery_executor, kubernetes_executor): super().__init__() self._job_id: Optional[str] = None self.celery_executor = celery_executor self.kubernetes_executor = kubernetes_executor @property
[docs] def queued_tasks(self) -> Dict[TaskInstanceKey, QueuedTaskInstanceType]: """Return queued tasks from celery and kubernetes executor""" queued_tasks = self.celery_executor.queued_tasks.copy() queued_tasks.update(self.kubernetes_executor.queued_tasks) return queued_tasks
[docs] def running(self) -> Set[TaskInstanceKey]: """Return running tasks from celery and kubernetes executor""" return self.celery_executor.running.union(self.kubernetes_executor.running)
[docs] def job_id(self): """ This is a class attribute in BaseExecutor but since this is not really an executor, but a wrapper of executors we implement as property so we can have custom setter. """ return self._job_id
@job_id.setter def job_id(self, value): """job_id is manipulated by SchedulerJob. We must propagate the job_id to wrapped executors.""" self._job_id = value self.kubernetes_executor.job_id = value self.celery_executor.job_id = value
[docs] def start(self) -> None: """Start celery and kubernetes executor""" self.celery_executor.start() self.kubernetes_executor.start()
[docs] def slots_available(self): """Number of new tasks this executor instance can accept""" return self.celery_executor.slots_available
[docs] def queue_command( self, task_instance: TaskInstance, command: CommandType, priority: int = 1, queue: Optional[str] = None, ): """Queues command via celery or kubernetes executor""" executor = self._router(task_instance) self.log.debug("Using executor: %s for %s", executor.__class__.__name__, task_instance.key) executor.queue_command(task_instance, command, priority, queue)
[docs] def queue_task_instance( self, task_instance: TaskInstance, mark_success: bool = False, pickle_id: Optional[str] = None, ignore_all_deps: bool = False, ignore_depends_on_past: bool = False, ignore_task_deps: bool = False, ignore_ti_state: bool = False, pool: Optional[str] = None, cfg_path: Optional[str] = None, ) -> None: """Queues task instance via celery or kubernetes executor""" executor = self._router(SimpleTaskInstance(task_instance)) self.log.debug( "Using executor: %s to queue_task_instance for %s", executor.__class__.__name__, task_instance.key ) executor.queue_task_instance( task_instance, mark_success, pickle_id, ignore_all_deps, ignore_depends_on_past, ignore_task_deps, ignore_ti_state, pool, cfg_path,
[docs] def has_task(self, task_instance: TaskInstance) -> bool: """ Checks if a task is either queued or running in either celery or kubernetes executor. :param task_instance: TaskInstance :return: True if the task is known to this executor """ return self.celery_executor.has_task(task_instance) or self.kubernetes_executor.has_task( task_instance
[docs] def heartbeat(self) -> None: """Heartbeat sent to trigger new jobs in celery and kubernetes executor""" self.celery_executor.heartbeat() self.kubernetes_executor.heartbeat()
[docs] def get_event_buffer(self, dag_ids=None) -> Dict[TaskInstanceKey, EventBufferValueType]: """ Returns and flush the event buffer from celery and kubernetes executor :param dag_ids: to dag_ids to return events for, if None returns all :return: a dict of events """ cleared_events_from_celery = self.celery_executor.get_event_buffer(dag_ids) cleared_events_from_kubernetes = self.kubernetes_executor.get_event_buffer(dag_ids) return {**cleared_events_from_celery, **cleared_events_from_kubernetes}
[docs] def try_adopt_task_instances(self, tis: List[TaskInstance]) -> List[TaskInstance]: """ Try to adopt running task instances that have been abandoned by a SchedulerJob dying. Anything that is not adopted will be cleared by the scheduler (and then become eligible for re-scheduling) :return: any TaskInstances that were unable to be adopted :rtype: list[airflow.models.TaskInstance] """ celery_tis = [] kubernetes_tis = [] abandoned_tis = [] for ti in tis: if ti.queue == self.KUBERNETES_QUEUE: kubernetes_tis.append(ti) else: celery_tis.append(ti) abandoned_tis.extend(self.celery_executor.try_adopt_task_instances(celery_tis)) abandoned_tis.extend(self.kubernetes_executor.try_adopt_task_instances(kubernetes_tis)) return abandoned_tis
[docs] def end(self) -> None: """End celery and kubernetes executor""" self.celery_executor.end() self.kubernetes_executor.end()
[docs] def terminate(self) -> None: """Terminate celery and kubernetes executor""" self.celery_executor.terminate() self.kubernetes_executor.terminate()
[docs] def _router(self, simple_task_instance: SimpleTaskInstance) -> Union[CeleryExecutor, KubernetesExecutor]: """ Return either celery_executor or kubernetes_executor :param simple_task_instance: SimpleTaskInstance :return: celery_executor or kubernetes_executor :rtype: Union[CeleryExecutor, KubernetesExecutor] """ if simple_task_instance.queue == self.KUBERNETES_QUEUE: return self.kubernetes_executor return self.celery_executor
[docs] def debug_dump(self): """Called in response to SIGUSR2 by the scheduler""""Dumping CeleryExecutor state") self.celery_executor.debug_dump()"Dumping KubernetesExecutor state") self.kubernetes_executor.debug_dump()

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