grafana: make alerts better for fux

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

@@ -1,4 +1,14 @@
 groups:
+  - name: Generic
+    rules:
+      - alert: HostJobFlaky
+        expr: group by(host, job) (changes(up{org="fux", job!="integrations/unix"}[24h]) > 5)
+        for: 0m
+        labels:
+          severity: info
+        annotations:
+          summary: Job {{ $labels.job }} flaky on (host {{ $labels.instance }})
+          description: "The job {{ $labels.job }} on target: {{ labels.host }} has been flaky over the last 24 hours.\n VALUE = {{ $value }}"
   - name: SNMP
     rules:
       - alert: SnmpTargetMissing
@@ -8,15 +18,7 @@ groups:
           severity: critical
         annotations:
           summary: SNMP target missing (instance {{ $labels.instance }})
-          description: "A SNMP target has disappeared for more the 30 min.\n  VALUE = {{ $value }}"
-      - alert: SnmpTargetFalky
-        expr: changes(up{job=~"snmp"}[24h]) > 5
-        for: 0m
-        labels:
-            severity: info
-        annotations:
-          summary: SNMP target flaky (instance {{ $labels.instance }})
-          description: "A SNMP target is has a flaky respons over the last 24 hours.\n VALUE = {{ $value }}"
+          description: "A SNMP target has disappeared for more the 15 min.\n  VALUE = {{ $value }}"
   - name: DHCP
     rules:
       - alert: DhcpFuxSharedFailed