Basic AWS lambda function use to raise received notifications to Slack.
Notification originates from Cloudwatch Alarm -> SNS -> Lambda
Expects SLACK_WEBHOOK_URL env var to raise notification, if not supplied it will print payload that would be sent to Slack.
Parses incoming SNS message and POSTs to above webhook url.
See sample.json for example data, this allows the main.py to be run locally.
See package.sh to build zip file with dependencies
Terraform creates:
- Lambda function
- SNS Topic
- SNS Topic subscription to Lambda
- SNS Topic policy to allow Cloudwatch Alarms to publish
| Variable | Description | Default |
|---|---|---|
| s3_bucket | S3 bucket containing cloudwatch-to-slack Lambda function | |
| s3_key | S3 key for cloudwatch-to-slack Lambda function | |
| sns_topic_arn | ARN of topic that will trigger Lambda | |
| prefix | Prefix for services | |
| slack_webhook_url | Slack webhook URL to call | |
| runtime | Python runtime to use for lambda | python3.11 |
| Variable | Description |
|---|---|
| sns_topic_arn | ARN of SNS topic for handling Cloudwatch Alarm |