Add Prometheus liveness and readiness probes

CHANGES.md

@@ -6,6 +6,10 @@ Notable changes between versions.
 
 * Update Calico from v3.1.2 to v3.1.3
 
+#### Addons
+
+* Add Prometheus liveness and readiness probes
+
 ## v1.10.3
 
 * Kubernetes [v1.10.3](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.10.md#v1103)

addons/prometheus/deployment.yaml

@@ -20,6 +20,7 @@ spec:
         - name: prometheus
           image: quay.io/prometheus/prometheus:v2.2.1
           args:
+            - --web.listen-address=0.0.0.0:9090
             - --config.file=/etc/prometheus/prometheus.yaml
             - --storage.tsdb.path=/var/lib/prometheus
           ports:
@@ -32,8 +33,18 @@ spec:
               mountPath: /etc/prometheus/rules
             - name: data
               mountPath: /var/lib/prometheus
-      dnsPolicy: ClusterFirst
-      restartPolicy: Always
+          readinessProbe:
+            httpGet:
+              path: /-/ready
+              port: 9090
+            initialDelaySeconds: 10
+            timeoutSeconds: 10
+          livenessProbe:
+            httpGet:
+              path: /-/healthy
+              port: 9090
+            initialDelaySeconds: 10
+            timeoutSeconds: 10
       terminationGracePeriodSeconds: 30
       volumes:
         - name: config