[stable/heapster] Add support for environment variables (#1919)

* [stable/heapster] Add support for environment variables

* Incorporate code review feedback

stable/heapster/templates/deployment.yaml

@@ -31,6 +31,10 @@ spec:
           timeoutSeconds: 5
         resources:
 {{ toYaml .Values.resources | indent 12 }}
+      {{- if .Values.env }}
+        env:
+{{ toYaml .Values.env | indent 10 }}
+      {{- end }}
         command:
           {{- range .Values.command }}
           - {{ . | quote }}

stable/heapster/values.yaml

@@ -45,6 +45,9 @@ command:
 - "/heapster"
 - "--source=kubernetes.summary_api:''"
 
+## heapster env variables
+env: []
+
 ## Resizer scales resources linearly with the number of nodes in the cluster
 ## Resizer is enabled by default
 ##