Sample: Kubernetes deployment file to deploy MySQL DB with persistence storage, deploy PHP MyAdmin tool to manage data in MySQL DB and a sample ASP.NET Core web application that interacts with MySQLDB

aspnetcore-webapp-deployment.yaml

apiVersion: v1
kind: Service
metadata:
  name: aspnetcore
  labels:
    name: aspnetcore
    owner:  Bindu
spec:
  type: NodePort
  ports:
  - port: 8001
    targetPort: 80
  selector:
    app: aspnetcore

---  
apiVersion: apps/v1 
kind: Deployment
metadata:
  name:  aspnetcore
  labels:
    name:  aspnetcore
spec:
  selector:
      matchLabels:
        app: aspnetcore
  template:
    metadata:
      labels:
        app:  aspnetcore
        owner:  Bindu
    spec:
      containers:
      - image:  bindukaladeepan/corewebappsimple:3.0
        name:  corewebappsimple
        env:
          # This will help in displaying full error
        - name: ASPNETCORE_ENVIRONMENT
          value: Development
        - name: MYSQLCONNECTION
          value: server=db;port=3306;database=sakila;user=root;password=bindu123  
        ports:
        - containerPort:  80
      restartPolicy: Always
        
      

mysql-deployment.yaml

apiVersion: v1
kind: Service
metadata:
  name: db
spec:
  ports:
  - port: 3306
  selector:
    app: mysql
  clusterIP: None
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: mysql-pv-claim
spec:
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 2Gi
---
apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
  name: mysql
spec:
  selector:
    matchLabels:
      app: mysql
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: mysql
        owner: Bindu
    spec:
      containers:
      - image: mysql:latest
        name: mysql
        env:
          # Use secret in real usage
        - name: MYSQL_ROOT_PASSWORD
          value: bindu123
        ports:
        - containerPort: 3306
          name: mysql
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:
          claimName: mysql-pv-claim

phpmyadmin-deployment.yaml

apiVersion: v1
kind: Service
metadata:
  name: phpmyadmin
  labels:
    name: phpmyadmin
    owner:  Bindu
spec:
  type: NodePort
  ports:
  - port: 80 
  selector:
    app: phpmyadmin

---  
apiVersion: apps/v1 
kind: Deployment
metadata:
  name:  phpmyadmin
  labels:
    name:  phpmyadmin
spec:
  selector:
      matchLabels:
        app: phpmyadmin
  template:
    metadata:
      labels:
        app:  phpmyadmin
        owner:  Bindu
    spec:
      containers:
      - image:  phpmyadmin/phpmyadmin:latest
        name:  phpmyadmin
        ports:
        - containerPort:  80
      restartPolicy: Always