[incubator/kafka] Fix initContainer failure which did not error (#4400)

* [incubator/kafka] Fix initContainer failure which did not error

* [incubator/kafka] Set initContainer to fail when vars are undefined

incubator/kafka/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v1
 description: Apache Kafka is publish-subscribe messaging rethought as a distributed
   commit log.
 name: kafka
-version: 0.4.3
+version: 0.4.4
 keywords:
 - kafka
 - zookeeper

incubator/kafka/templates/statefulset.yaml

@@ -28,8 +28,10 @@ spec:
       - name: init-ext
         image: "{{ .Values.external.init.image }}:{{ .Values.external.init.imageTag }}"
         imagePullPolicy: "{{ .Values.external.init.imagePullPolicy }}"
-        args:
-        - -n ${POD_NAMESPACE} label pods ${POD_NAME} pod=${POD_NAME}
+        command:
+          - sh
+          - -euxc
+          - "kubectl label pods ${POD_NAME} --namespace ${POD_NAMESPACE} pod=${POD_NAME}"
         env:
           - name: POD_NAME
             valueFrom:

incubator/kafka/values.yaml

@@ -69,8 +69,8 @@ external:
   firstListenerPort: 31090
   domain: cluster.local
   init:
-    image: "lachlanevenson/k8s-kubectl"
-    imageTag: "v1.9.3"
+    image: "lwolf/kubectl_deployer"
+    imageTag: "0.4"
     imagePullPolicy: "IfNotPresent"
 
 ## Configuration Overrides. Specify any Kafka settings you would like set on the StatefulSet