def check_errors_in_cloudwatch()

in functions/simple/simple.py [0:0]

• 33 lines of code
• 1 McCabe index (conditional complexity)

def check_errors_in_cloudwatch(func_name, alias_name, new_version):
	client = boto3.client('cloudwatch')

	func_plus_alias = func_name + ":" + alias_name
	now = datetime.utcnow()
	start_time = now - timedelta(minutes=1)

	response = client.get_metric_statistics(
		Namespace='AWS/Lambda',
		MetricName='Errors',
		Dimensions=[
			{
				'Name': 'FunctionName',
				'Value': func_name
			},
			{
				'Name': 'Resource',
				'Value': func_plus_alias
			},
			{
				'Name': 'ExecutedVersion',
				'Value': new_version
			}
		],
		StartTime=start_time,
		EndTime=now,
		Period=60,
		Statistics=['Sum']
	)
	datapoints = response['Datapoints']
	for datapoint in datapoints:
		if datapoint['Sum'] > 0:
			log.info("Failing health check because error metrics were found for new version: {0}".format(datapoints))
			return False

	return True