Once a minute this lambda function will check to see if your endpoint is up. If so it will send the response time to Cloudwatch. A Cloudwatch alarm will then email you when the endpoint is down (ALARM) or if the lambda function stops working (INSUFFICENT RESULTS).
Cloudwatch Event (1 minute) > AWS Lambda > Cloudwatch Data > Cloudwatch Alarm > SNS Topic > SNS Email Subscription
Estimated Costs: $0.05/month (not including free tier) source
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Install node.js
- manually: https://nodejs.org
- or via package manager: https://nodejs.org/en/download/package-manager/
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Install the serverless command line tools
npm install -g serverless
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Define AWS Credentials that serverless will use.
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Deploy this service to AWS (swap out parameters for your needs)
serverless deploy \
--ping-name=google \
--ping-host=https://google.com \
--ping-alarm-email=alertme@gmail.com
That's it! 🎉
To remove all resources created run
serverless remove --ping-name=google
Alarm namespace - By default the cloudwatch data will be put under the Serverless/Ping namespace. You can override it using --ping-alarm-namespace.
--ping-alarm-namespace=MyNamespace/Ping
Exception Monitoring - Any exceptions thrown in the lambda function will be logged to CloudWatch Logs. If you would like them also sent to sentry add the DSN as another paramter to the serverless deploy command above.
--ping-sentry-dsn=https://*********:*******@sentry.io/*****
Installing dependencies. Vendored dependencies are included in the git repo to make it easier for users to deploy this.
pip3 install -t vendored/ -r requirements.txt --upgrade