I have kubernetes cluster. I have started mysql from kubectl. I have a image of spring boot application. I am confused with the JDBC url to be used in application.yml. I have tried multiple IP addresses by describing pods, services etc. It is getting errored out with "communication Link failure"

Below is my mysql-deployment.yml

apiVersion: v1
kind: Service
metadata:
  name: mysql
spec:
  #type: NodePort
  ports:
  - port: 3306
    #targetPort: 3306
    #nodePort: 31000
  selector:
    app: mysql
  clusterIP: None
---
apiVersion: v1    
kind: Secret
metadata:
  name: mysql-secret
type: Opaque
data:
  MYSQL_ROOT_PASSWORD: cGFzc3dvcmQ= #password
  MYSQL_DATABASE: dGVzdA== #test
  MYSQL_USER: dGVzdHVzZXI= #testuser
  MYSQL_PASSWORD: dGVzdDEyMw== #test123
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-pv-claim
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql
spec:
  selector:
    matchLabels:
      app: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - image: mysql:5.7
        name: mysql
        env:
          # Use secret in real usage
        - name: MYSQL_ROOT_PASSWORD
          valueFrom:
              secretKeyRef:
                name: mysql-secret
                key: MYSQL_ROOT_PASSWORD
        - name: MYSQL_DATABASE
          valueFrom:
              secretKeyRef:
                name: mysql-secret
                key: MYSQL_DATABASE
        - name: MYSQL_USER
          valueFrom:
              secretKeyRef:
                name: mysql-secret
                key: MYSQL_USER
        - name: MYSQL_PASSWORD
          valueFrom:
              secretKeyRef:
                name: mysql-secret
                key: MYSQL_PASSWORD          
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim