[stable/kube2iam] Add liveness probe (#3400)

* Add liveness check so kube takes care of kube2iam in the event of any issues

* Configure --app-port to remain consistent with Helm chart value of .host.port

* Bump minor version

* Remove option to disable liveness probe

stable/kube2iam/Chart.yaml

@@ -1,5 +1,5 @@
 name: kube2iam
-version: 0.7.0
+version: 0.8.0
 description: Provide IAM credentials to pods based on annotations.
 keywords:
 - kube2iam

stable/kube2iam/README.md

@@ -56,7 +56,6 @@ Parameter | Description | Default
 `updateStrategy` | Strategy for DaemonSet updates (requires Kubernetes 1.6+) | `OnDelete`
 `verbose` | Enable verbose output | `false`
 
-
 Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
 
 ```console

stable/kube2iam/templates/daemonset.yaml

@@ -37,6 +37,7 @@ spec:
           {{- if .Values.verbose }}
             - --verbose
           {{- end }}
+            - --app-port={{ .Values.host.port }}
           env:
             - name: HOST_IP
               valueFrom:
@@ -59,7 +60,17 @@ spec:
               value: {{ .Values.aws.region }}
           {{- end }}
           ports:
-            - containerPort: 8181
+            - containerPort: {{ .Values.host.port }}
+          livenessProbe:
+            httpGet:
+              path: /healthz
+              port: {{ .Values.host.port }}
+              scheme: HTTP
+            initialDelaySeconds: 30
+            periodSeconds: 5
+            successThreshold: 1
+            failureThreshold: 3
+            timeoutSeconds: 1
           resources:
 {{ toYaml .Values.resources | indent 12 }}
         {{- if .Values.host.iptables }}

stable/kube2iam/values.yaml

@@ -8,6 +8,7 @@ host:
   ip: $(HOST_IP)
   iptables: false
   interface: docker0
+  port: 8181
 
 image:
   repository: jtblin/kube2iam