Created
December 1, 2020 21:50
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Switch on/off AWS CloudWatch Rules
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import os | |
import logging | |
from typing import Dict, List | |
import boto3 | |
from botocore.exceptions import ClientError | |
class CloudWatchRules: | |
def __init__(self, client=None): | |
self._client = client if client else boto3.client('events') | |
def switch(self, rule_name: str): | |
if self.is_enabled(rule_name): | |
self.disable(rule_name) | |
else: | |
self.enable(rule_name) | |
def _get_state(self, rule_name: str): | |
response = self._client.describe_rule(rule_name) | |
return response['State'] | |
def is_enabled(self, rule_name: str) -> bool: | |
return self._get_state(rule_name) == 'ENABLED' | |
def enable(self, rule_name: str): | |
self._client.enable_rule(Name=rule_name) | |
def disable(self, rule_name: str): | |
self._client.disable_rule(Name=rule_name) | |
def list(self, prefix: str) -> List[Dict[str, str]]: | |
response = self._client.list_rules(NamePrefix=prefix) | |
return response['Rules'] | |
if __name__ == "__main__": | |
logger = logging.getLogger(__name__) | |
action = os.environ.get('RULE_ACTION', 'ENABLE') | |
stage = 'dev' | |
events_name_prefix = 'mdl' | |
cloudwatch_events = CloudWatchRules() | |
cloudwatch_rules = [rule['Name'] for rule in cloudwatch_events.list(events_name_prefix)] | |
for rule_name in cloudwatch_rules: | |
logger.info(f"Switching CloudWatch Event Rule: {rule_name}.") | |
try: | |
if action == 'ENABLE': | |
cloudwatch_events.enable(rule_name) | |
else: | |
cloudwatch_events.disable(rule_name) | |
except ClientError as error: | |
error_code = error.response.get("Error", {}).get("Code") | |
if error_code == "ResourceNotFoundException": | |
logger.error(f"Error when switching CloudWatch Event Rule: {rule_name}. {error}.") | |
else: | |
raise |
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