airflow cloud_formation 源码
airflow cloud_formation 代码
文件路径：/airflow/providers/amazon/aws/hooks/cloud_formation.py
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"""This module contains AWS CloudFormation Hook"""
from __future__ import annotations
from boto3 import client, resource
from botocore.exceptions import ClientError
from airflow.providers.amazon.aws.hooks.base_aws import AwsBaseHook
class CloudFormationHook(AwsBaseHook):
"""
Interact with AWS CloudFormation.
Additional arguments (such as ``aws_conn_id``) may be specified and
are passed down to the underlying AwsBaseHook.
.. seealso::
:class:`~airflow.providers.amazon.aws.hooks.base_aws.AwsBaseHook`
"""
def __init__(self, *args, **kwargs):
super().__init__(client_type='cloudformation', *args, **kwargs)
def get_stack_status(self, stack_name: client | resource) -> dict | None:
"""Get stack status from CloudFormation."""
self.log.info('Poking for stack %s', stack_name)
try:
stacks = self.get_conn().describe_stacks(StackName=stack_name)['Stacks']
return stacks[0]['StackStatus']
except ClientError as e:
if 'does not exist' in str(e):
return None
else:
raise e
def create_stack(self, stack_name: str, cloudformation_parameters: dict) -> None:
"""
Create stack in CloudFormation.
:param stack_name: stack_name.
:param cloudformation_parameters: parameters to be passed to CloudFormation.
"""
if 'StackName' not in cloudformation_parameters:
cloudformation_parameters['StackName'] = stack_name
self.get_conn().create_stack(**cloudformation_parameters)
def delete_stack(self, stack_name: str, cloudformation_parameters: dict | None = None) -> None:
"""
Delete stack in CloudFormation.
:param stack_name: stack_name.
:param cloudformation_parameters: parameters to be passed to CloudFormation (optional).
"""
cloudformation_parameters = cloudformation_parameters or {}
if 'StackName' not in cloudformation_parameters:
cloudformation_parameters['StackName'] = stack_name
self.get_conn().delete_stack(**cloudformation_parameters)
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