asterisk: Add pod monitor and alerting rules

asterisk/application.yml

@@ -48,3 +48,44 @@ spec:
         - name: config
           secret:
             secretName: asterisk-secrets
+---
+apiVersion: monitoring.coreos.com/v1
+kind: PodMonitor
+metadata:
+  name: asterisk
+spec:
+  selector:
+    matchLabels:
+      app: asterisk
+  podMetricsEndpoints:
+    - port: metrics
+---
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: asterisk
+spec:
+  groups:
+    - name: asterisk
+      rules:
+        - alert: AsteriskPhoneNotRegistered
+          expr: asterisk_endpoints_state{resource=~"1.*"} < 2
+          for: 5m
+          labels:
+            severity: critical
+          annotations:
+            summary: "{{ $labels.resource }} is not registered."
+        - alert: AsteriskOutboundNumberNotRegistered
+          expr: asterisk_pjsip_outbound_registration_status == 0
+          for: 5m
+          labels:
+            severity: critical
+          annotations:
+            summary: "{{ $labels.username }} is not registered with provider."
+        - alert: AsteriskCallsPerMinuteLimitExceed
+          expr: asterisk_channels_duration_seconds > 10*60
+          for: 20m
+          labels:
+            severity: warning
+          annotations:
+            summary: "Call at channel {{ $labels.name }} is taking longer than 10m."