title: error converting YAML to JSON, did not find expected key kubernetes
body: <p>I am doing a lab about kubernetes in google cloud.<br>
  I have create the YAML file, but when I am trying to deploy it a shell shows me this error:  </p>
  
  <pre><code>error converting YAML to JSON: yaml: line 34: did not find expected key
  </code></pre>
  
  <p>YAML file:</p>
  
  <pre><code>apiVersion: apps/v1
  kind: Deployment
  metadata:
    name: nginx
    labels:
      app: nginx
  spec:
    replicas: 2
    selector:
      matchLabels:
        app: nginx
      spec:
        volumes:
        - name: nginx-config
          configMap:
            name: nginx-config
        - name: php-config
          configMap:
            name: php-config
        containers:
        - image: php-fpm:7.2
          name: php
          ports:
          - containerPort: 9000
          volumeMounts:
          - name: persistent-storage
            mountPath: /var/www/data
          - name: php-config
            mountPath: /usr/local/etc/php-fpm.d/www.conf
            subPath: www.conf
        - image: nginx:latest
          name: nginx
          - containerPort: 80
          volumeMounts:
          - name: persistent-storage
            mountPath: /var/www/data
          - name: nginx-config
            mountPath: /etc/nginx/nginx.conf
            subPath: nginx.conf
        volumes:
          - name: persistent-storage
            persistentVolumeClaim:
              claimName: nfs-pvc
  </code></pre>