Source code for airflow.contrib.operators.ecs_operator

# -*- coding: utf-8 -*-
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import sys
import re

from airflow.exceptions import AirflowException
from airflow.models import BaseOperator
from airflow.utils import apply_defaults

from airflow.contrib.hooks.aws_hook import AwsHook

[docs]class ECSOperator(BaseOperator): """ Execute a task on AWS EC2 Container Service :param task_definition: the task definition name on EC2 Container Service :type task_definition: str :param cluster: the cluster name on EC2 Container Service :type cluster: str :param overrides: the same parameter that boto3 will receive (templated): :type overrides: dict :param aws_conn_id: connection id of AWS credentials / region name. If None, credential boto3 strategy will be used ( :type aws_conn_id: str :param region_name: region name to use in AWS Hook. Override the region_name in connection (if provided) :type region_name: str :param launch_type: the launch type on which to run your task ('EC2' or 'FARGATE') :type launch_type: str """ ui_color = '#f0ede4' client = None arn = None template_fields = ('overrides',) @apply_defaults def __init__(self, task_definition, cluster, overrides, aws_conn_id=None, region_name=None, launch_type='EC2', **kwargs): super(ECSOperator, self).__init__(**kwargs) self.aws_conn_id = aws_conn_id self.region_name = region_name self.task_definition = task_definition self.cluster = cluster self.overrides = overrides self.launch_type = launch_type self.hook = self.get_hook()
[docs] def execute(self, context): 'Running ECS Task - Task definition: %s - on cluster %s', self.task_definition, self.cluster )'ECSOperator overrides: %s', self.overrides) self.client = self.hook.get_client_type( 'ecs', region_name=self.region_name ) response = self.client.run_task( cluster=self.cluster, taskDefinition=self.task_definition, overrides=self.overrides, startedBy=self.owner, launchType=self.launch_type ) failures = response['failures'] if len(failures) > 0: raise AirflowException(response)'ECS Task started: %s', response) self.arn = response['tasks'][0]['taskArn'] self._wait_for_task_ended() self._check_success_task()'ECS Task has been successfully executed: %s', response)
def _wait_for_task_ended(self): waiter = self.client.get_waiter('tasks_stopped') waiter.config.max_attempts = sys.maxsize # timeout is managed by airflow waiter.wait( cluster=self.cluster, tasks=[self.arn] ) def _check_success_task(self): response = self.client.describe_tasks( cluster=self.cluster, tasks=[self.arn] )'ECS Task stopped, check status: %s', response) if len(response.get('failures', [])) > 0: raise AirflowException(response) for task in response['tasks']: # This is a `stoppedReason` that indicates a task has not # successfully finished, but there is no other indication of failure # in the response. # See, # noqa E501 if re.match(r'Host EC2 \(instance .+?\) (stopped|terminated)\.', task.get('stoppedReason', '')): raise AirflowException( 'The task was stopped because the host instance terminated: {}'. format(task.get('stoppedReason', ''))) containers = task['containers'] for container in containers: if container.get('lastStatus') == 'STOPPED' and \ container['exitCode'] != 0: raise AirflowException( 'This task is not in success state {}'.format(task)) elif container.get('lastStatus') == 'PENDING': raise AirflowException('This task is still pending {}'.format(task)) elif 'error' in container.get('reason', '').lower(): raise AirflowException( 'This containers encounter an error during launching : {}'. format(container.get('reason', '').lower())) def get_hook(self): return AwsHook( aws_conn_id=self.aws_conn_id )
[docs] def on_kill(self): response = self.client.stop_task( cluster=self.cluster, task=self.arn, reason='Task killed by the user')