Test case for mounting configmaps with a subpath

gistfile1.txt

apiVersion: v1
kind: ConfigMap
metadata:
  name: resolv-conf-configmap
  labels:
    app: configmap-test
data:
  resolv.conf: |
    nameserver 8.8.8.8

---

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: configmap-test
spec:
  replicas: 1
  selector:
    matchLabels:
      app: configmap-test
  template:
    metadata:
      labels:
        app: configmap-test
    spec:
      containers:
      - name: helloworld
        image: giantswarm/helloworld:latest
        ports:
        - containerPort: 8080
        volumeMounts:
          - name: resolv-conf
            mountPath: /etc/resolv.conf
            subPath: resolv.conf
      volumes:
        - name: resolv-conf
          configMap:
            name: resolv-conf-configmap
            optional: true