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from typing import TYPE_CHECKING, Optional, Sequence

from import EC2Hook
from airflow.sensors.base import BaseSensorOperator

    from airflow.utils.context import Context

[docs]class EC2InstanceStateSensor(BaseSensorOperator): """ Check the state of the AWS EC2 instance until state of the instance become equal to the target state. .. seealso:: For more information on how to use this sensor, take a look at the guide: :ref:`howto/sensor:EC2InstanceStateSensor` :param target_state: target state of instance :param instance_id: id of the AWS EC2 instance :param region_name: (optional) aws region name associated with the client """
[docs] template_fields: Sequence[str] = ("target_state", "instance_id", "region_name")
[docs] ui_color = "#cc8811"
[docs] ui_fgcolor = "#ffffff"
[docs] valid_states = ["running", "stopped", "terminated"]
def __init__( self, *, target_state: str, instance_id: str, aws_conn_id: str = "aws_default", region_name: Optional[str] = None, **kwargs, ): if target_state not in self.valid_states: raise ValueError(f"Invalid target_state: {target_state}") super().__init__(**kwargs) self.target_state = target_state self.instance_id = instance_id self.aws_conn_id = aws_conn_id self.region_name = region_name
[docs] def poke(self, context: 'Context'): ec2_hook = EC2Hook(aws_conn_id=self.aws_conn_id, region_name=self.region_name) instance_state = ec2_hook.get_instance_state(instance_id=self.instance_id)"instance state: %s", instance_state) return instance_state == self.target_state

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