Simple, serverless, low-cost service monitor deployable on Amazon Web Services, that allows you to monitorize the status of any HTTP/S endpoints and receive notification updates through Telegram.
- Python3 with
pipinstalled. - Terraform, for deploying the infrastructure.
Once deployed, the monitor will be composed by the following AWS resources:
- A SNS Topic, that will receive the state updates and broadcast them among all its subscriptors. By default, it will only send notifications to Telegram, but you might create your own subscriptions (email, SMS, etc)
- A Lambda function, that will receive the updates from SNS, and forward it to the recipients specified in the config.
- Some lambda functions, one per monitorized service, that will be in charge of periodically make requests to the services to check their status.
- Some Cloudwatch events, one per monitorized service, that will execute each Lambda monitor of each service one time each minute, to perform the checks.
- A S3 bucket, that will store the state of all the monitors. Everytime a monitorized service changes its status, it is saved on the bucket. Usually, the monitor will grab its own state from a cache on the Lambda function itself, but it might fully reload its state from the bucket if a "cold-start" occurs.
- All the required IAM roles & policies.
- Copy the
deploy-config.sh.templatefile todeploy-config.sh - Modify the
deploy-config.shto change the monitor configuration fit your needs (More info on the file itself) - Run
make deploy. This will deploy all your configured monitors to your AWS account.
The best way to use this monitor is to take advantage of the AWS Free Tier, that will make you to be able to run up to (theorically) 13 different monitors with a near-free price.
If don't, you'll probably be charged with about $0.40/service, mainly for the executions of the Lambda functions that monitorize the services.
Also, if you enable the upload of CloudWatch metrics and you are out of the AWS Free Tier, you'll be charged for each custom metric measured by each monitor. You can fully disable CloudWatch metrics from the monitors, anyway.
This software is distributed under the GNU GPL License v3.0. You can freely use this software, and modify it. But if you distribute some modification, do it for everyone!.