mysql-deployment.yaml

apiVersion:  apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  namespace: wordpress
  name: mysql-deployment
  labels:
    app: wordpress
spec:
  selector:
    matchLabels:
      app: wordpress
      tier: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: wordpress
        tier: mysql
    spec:
      containers:
      - image: mysql:5.6
        name: mysql
        env:
        - name: MYSQL_ROOT_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysql-pass        # the one generated before in secret.yml
              key: password
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage  # which data will be stored
          mountPath: "/var/lib/mysql"
      volumes:
      - name: mysql-persistent-storage    # PVC
        persistentVolumeClaim:
          claimName: mysql-persistent-storage