持久化存储

数据持久化存储类型：
emptyDir
HostPath

1. emptyDir:

    spec:
      nodeName: 10.0.0.13
      volumes:
      - name: mysql
        emptyDir: {}
      containers:
        - name: wp-mysql
          image: 10.0.0.11:5000/mysql:5.7
          imagePullPolicy: IfNotPresent
          ports:
          - containerPort: 3306
          volumeMounts:
          - mountPath: /var/lib/mysql
            name: mysql

2.HostPath:

    spec:
      nodeName: 10.0.0.13
      volumes:
      - name: mysql
        hostPath:
          path: /data/wp_mysql
      containers:
        - name: wp-mysql
          image: 10.0.0.11:5000/mysql:5.7
          imagePullPolicy: IfNotPresent
          ports:
          - containerPort: 3306
          volumeMounts:
          - mountPath: /var/lib/mysql
            name: mysql