I dunno, I don't really mind self-hosting monitoring infrastructure. I basically pay for a website uptime checker to check that Alertmanager is working. If Al

I dunno, I don't really mind self-hosting monitoring infrastructure. I basically pay for a website uptime checker to check that Alertmanager is working. If Alertmanager is down, obviously you have to manually check to see what else is down, but it doesn't fail open. I wrote a little glue to make this straightforward for anyone else who uses Prometheus/Alertmanager: https://github.com/jrockway/alertmanager-status https://github.com/jrockway/alertmanager-status This ensures that the website check checks the health of the whole alerting pipeline; Prometheus has an always firing alert, Alertmanager is set to send that alert to alertmanager-status, and alertmanager-status starts failing its external health check if it isn't seeing that alert firing at the configured interval. If one of [Prometheus, Alertmanager, alertmanager-status] fails, then your website health check fails.