我正在尝试使用mysql部署kubernetes，以便我可以从主机连接到它。
下面是部署文件：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: database
spec:
  replicas: 1
  selector:
    matchLabels:
      app: database
  template:
    metadata:
      labels:
        app: database
    spec:
      containers:
      - name: database
        image: mysql:5.6
        env:
        - name: MYSQL_ROOT_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysql-secret
              key: password
        - name: MYSQL_USER 
          valueFrom:
            secretKeyRef:
              name: mysql-secret
              key: username
        - name: MYSQL_PASSWORD 
          valueFrom:
            secretKeyRef:
              name: mysql-secret
              key: password
        ports:
          - containerPort: 3306
            protocol: TCP
        resources:
          limits:
            cpu: "250m"
            memory: "1Gi"
      volumes:  
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim
---
apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  type: NodePort
  selector:
    app: mysql
  ports:
  - port: 3306
    targetPort: 3306
    nodePort: 32700
  externalIPs:
  - 1.2.4.8

如果我运行minikube service list，就会显示：

|----------------------|---------------------------|--------------|-----|
|      NAMESPACE       |           NAME            | TARGET PORT  | URL |
|----------------------|---------------------------|--------------|-----|
| default              | kubernetes                | No node port |     |
| default              | mysql                     |         3306 |     |
| kube-system          | kube-dns                  | No node port |     |
| kubernetes-dashboard | dashboard-metrics-scraper | No node port |     |
| kubernetes-dashboard | kubernetes-dashboard      | No node port |     |
|----------------------|---------------------------|--------------|-----|

如果我尝试minikube service mysql --url，它会给我：
由于SVC_UNREACHABLE而退出：服务不可用：没有找到服务mysql的运行pod
不知道该怎么办;
1.为什么它不提供给我外部IP 1.2.4.8
1.为什么不显示节点端口？
1.为什么--url在服务似乎出现在列表中时不起作用？