grafana: make alerts better for fux

resources/chaosknoten/grafana/docker_compose/prometheus_alerts.rules.yaml

@@ -410,7 +410,7 @@ groups:
           summary: Prometheus job missing (instance {{ $labels.instance }})
           description: "A Prometheus job has disappeared\n  VALUE = {{ $value }}"
       - alert: PrometheusTargetMissing
-        expr: up == 0
+        expr: up{job!~"snmp|noc_room_temp"} == 0
         for: 0m
         labels:
           severity: critical
@@ -418,7 +418,7 @@ groups:
           summary: Prometheus target missing (instance {{ $labels.instance }})
           description: "A Prometheus target has disappeared. An exporter might be crashed.\n  VALUE = {{ $value }}"
       - alert: PrometheusAllTargetsMissing
-        expr: sum by (job) (up) == 0
+        expr: sum by (job) (up{job!~"snmp|noc_room_temp"}) == 0
         for: 0m
         labels:
           severity: critical