Hi all: I am fairly new to Prometheus. I am using the Prometheus version 2.15.2 that comes with Ubuntu 20.04.
On this page: https://awesome-prometheus-alerts.grep.to/rules I found this alert: - alert: PrometheusNotConnectedToAlertmanager expr: prometheus_notifications_alertmanagers_discovered < 1 for: 0m labels: severity: critical annotations: summary: Prometheus not connected to alertmanager (instance {{ $labels.instance }}) But it is not working properly. Metric prometheus_notifications_alertmanagers_discovered starts at 0, and then it goes to 1 as expected. However, when I stop the service, it does not revert to 0: systemctl stop prometheus-alertmanager.service I checked that Alertmanager is not running by trying to load this URL: http://localhost:9093/metrics By the way, my Prometheus configuration looks like this: alerting: alertmanagers: - static_configs: - targets: ['localhost:9093'] In fact, with prometheus-alertmanager.service still stopped, if I restart Prometheus, the value for prometheus_notifications_alertmanagers_discovered still goes from 0 to 1. When I start the Alertmanager, then alerts are generated and the e-mails come through. Is this a known issue with that Prometheus version? Or is there a better way to check whether the connection between Prometheus and Alertmanager is healthy? Thanks in advance, rdiez -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/1c5a0810-d916-4450-b579-7e56910788een%40googlegroups.com.
