我正在学习这里的持久磁盘教程，同时还将其创建为statefulset而不是部署。
当我将yaml文件运行到gke中时，数据库无法启动，查看日志，它有以下错误。
[错误]--指定了初始化，但数据目录中有文件。正在中止。
是否可以检查创建的卷以查看目录中的内容？否则，我做错了什么导致磁盘非空？
谢谢

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: datalayer-pvc
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 100Gi
---
apiVersion: v1
kind: Service
metadata:
  name: datalayer-svc
  labels:
    app: myapplication
spec:
  ports:
  - port: 80
    name: dbadmin
  clusterIP: None
  selector:
    app: database
---
apiVersion: apps/v1beta2
kind: StatefulSet
metadata:
  name: datalayer
spec:
  selector:
    matchLabels:
      app: myapplication
  serviceName: "datalayer-svc"
  replicas: 1
  template:
    metadata:
      labels:
        app: myapplication
    spec:
      terminationGracePeriodSeconds: 10
      containers:
      - name: database
        image: mysql:5.7.22
        env:
        - name: "MYSQL_ROOT_PASSWORD"
          valueFrom:
            secretKeyRef:
              name: mysql-root-password
              key: password
        - name: "MYSQL_DATABASE"
          value: "appdatabase"
        - name: "MYSQL_USER"
          value: "app_user"
        - name: "MYSQL_PASSWORD"
          value: "app_password"
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: datalayer-pv
          mountPath: /var/lib/mysql
      volumes:
      - name: datalayer-pv
        persistentVolumeClaim:
          claimName: datalayer-pvc