Can someone provide a generic example of AWS Cloudwatch Alarm based on Anomaly Detection of a metric built with AWS CDK in Python3?
I have tried mapping aws cloudformation example of it to aws_cdk.aws_cloudwatch.Alarm and aws_cdk.aws_cloudwatch.CfnAlarm with little to no luck.
Eventually managed to make anomaly detection work with CfnAlarm
from aws_cdk import (
aws_sns as sns,
aws_cloudwatch as cw,
core
)
anomaly_detector = cw.CfnAnomalyDetector(
self, "AnomalyDetector",
metric_name="my_metric",
namespace="my_namespace",
stat="Sum"
)
slack_topic = sns.Topic(self, "AnomalySns",
display_name="anomaly-sns",
topic_name="anomaly-sns"
)
anomaly_cfnalarm = cw.CfnAlarm(self, "AnomalyAlarm",
actions_enabled=True,
alarm_actions=[slack_topic.topic_arn],
alarm_description="<..>",
alarm_name="AnomalyAlarm",
comparison_operator="LessThanLowerOrGreaterThanUpperThreshold",
datapoints_to_alarm=1,
evaluation_periods=1,
insufficient_data_actions=[slack_topic.topic_arn],
metrics=[
cw.CfnAlarm.MetricDataQueryProperty(
expression="ANOMALY_DETECTION_BAND(m1, 2)",
id="ad1"
),
cw.CfnAlarm.MetricDataQueryProperty(
id="m1",
metric_stat=cw.CfnAlarm.MetricStatProperty(
metric=cw.CfnAlarm.MetricProperty(
metric_name=anomaly_detector.metric_name,
namespace=anomaly_detector.namespace
),
period=core.Duration.minutes(5).to_seconds(),
stat="Sum"
)
)
],
ok_actions=[slack_topic.topic_arn],
threshold_metric_id="ad1",
treat_missing_data="breaching"
)
This is partially based on AWS Docs CloudFormation example of Cloudwatch Anomaly Alarm https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html
There is no high level constructor for AbnormalDetector in current CDK(v1.27.0).
Pls directly use low level class CfnAnomalyDetector.
There is an example usage of AbnormalDetector with Alarm in CloudFormation doc. Use CDK low level Cfn* classes to create corresponding CFN configuration.