I maintain a number of websites for different clients and need to monitor their status. At this point a simple check if the site is still up would be sufficient, so I would prefer something simple. Other requirements: open source, self-hosted, configurable, web dashboard, automatic alerts and preferably available through docker compose.

Candidates:

• Nagios claims to be the industry standard for system monitoring but is a bit too much for me. There's also its open source fork Icinga.
• Zabbix looks overly complicated
• StatusOK looks like it does exactly what I want, but seems to be discontinued.
• Dashy

I also checked others, but found nothing I liked. I also checked if there's a suitable Python module, but also no luck.

So, maybe roll my own? This seems a start, and here, here, and here is more inspiration.

To be continued...