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67 lines
2.4 KiB
67 lines
2.4 KiB
# |
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# Licensed to the Apache Software Foundation (ASF) under one |
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# or more contributor license agreements. See the NOTICE file |
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# distributed with this work for additional information |
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# regarding copyright ownership. The ASF licenses this file |
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# to you under the Apache License, Version 2.0 (the |
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# "License"); you may not use this file except in compliance |
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# with the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, |
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# software distributed under the License is distributed on an |
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
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# KIND, either express or implied. See the License for the |
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# specific language governing permissions and limitations |
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# under the License. |
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# |
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from typing import Optional |
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from airflow.providers.amazon.aws.hooks.ec2 import EC2Hook |
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from airflow.sensors.base import BaseSensorOperator |
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from airflow.utils.decorators import apply_defaults |
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class EC2InstanceStateSensor(BaseSensorOperator): |
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""" |
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Check the state of the AWS EC2 instance until |
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state of the instance become equal to the target state. |
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:param target_state: target state of instance |
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:type target_state: str |
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:param instance_id: id of the AWS EC2 instance |
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:type instance_id: str |
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:param region_name: (optional) aws region name associated with the client |
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:type region_name: Optional[str] |
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""" |
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template_fields = ("target_state", "instance_id", "region_name") |
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ui_color = "#cc8811" |
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ui_fgcolor = "#ffffff" |
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valid_states = ["running", "stopped", "terminated"] |
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@apply_defaults |
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def __init__( |
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self, |
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*, |
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target_state: str, |
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instance_id: str, |
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aws_conn_id: str = "aws_default", |
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region_name: Optional[str] = None, |
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**kwargs, |
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): |
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if target_state not in self.valid_states: |
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raise ValueError(f"Invalid target_state: {target_state}") |
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super().__init__(**kwargs) |
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self.target_state = target_state |
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self.instance_id = instance_id |
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self.aws_conn_id = aws_conn_id |
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self.region_name = region_name |
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def poke(self, context): |
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ec2_hook = EC2Hook(aws_conn_id=self.aws_conn_id, region_name=self.region_name) |
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instance_state = ec2_hook.get_instance_state(instance_id=self.instance_id) |
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self.log.info("instance state: %s", instance_state) |
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return instance_state == self.target_state
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