I've been developing this tool myself as I've been constantly running into the issue of: I just want monitoring for my servers, nothing else, I don't care just let me know when they break.

So that's what I've made, you install an open source agent on your server and it automatically detects certain metrics and starts monitoring for you.

You can configure certain aspects if you like and at the moment alerting is limited to email only. I'm planning to add webhooks soon.

There is also live graphing. Metrics update every 5 seconds.

I'm using Django Rest Framework for the api, Django templates with HTMX for the frontend, Postgres for the database and Go for the agent. The agent has a pretty cool way of auto updating in the response to its requests, so you can configure the agent in the frontend if you need to and it'll tell the agent what to do when it next checks in.

Please let me know what you think :) You can monitor 1 server for free forever, no credit card required or anything.