add alert for unhealthy pod

prometheus/config-map.yaml

@@ -44,6 +44,16 @@ data:
         annotations:
           summary: "Free disk space below 2 GB"
           description: "Disk space on server {{ $labels.node }} is under 2 GB. Plox fix. Free Space: {{ $value }} GB on partition {{ $labels.device }}"
+    - name: KubernetesUnhealthyPod
+      rules:
+      - alert: KubernetesUnhealthyPod
+        expr: kube_pod_container_status_waiting_reason = 1
+        for: 5m
+        labels:
+          severity: warning
+        annotations:
+          summary: "The Pod {{ $labels.pod }} is {{ $labels.reason }}""
+          description: "The Pod {{ $labels.pod }} is in the state {{ $labels.reason }} for more than 5m. The Pod is in namespace {{ $labels.namespace }} and on node {{ $labels.node }}."
     - name: PrometheusTargetMissing
       rules:
       - alert: PrometheusTargetMissing