apiVersion: apps/v1
kind: Deployment
metadata:
  name: mysql-deployment
  namespace: blog
spec:
  replicas: 1
  selector:
    matchLabels:
      app: mysql
  template:
    metadata:
      labels:
        app: mysql
    spec:
      containers:
      - name: mysql
        image: mysql:8.0
        ports:
        - containerPort: 3306
        env:
        - name: MYSQL_ROOT_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysql-secret
              key: root_password
        - name: MYSQL_DATABASE
          valueFrom:
            configMapKeyRef:
              name: mysql-config
              key: database_name
        - name: MYSQL_USER
          valueFrom:
            configMapKeyRef:
              name: mysql-config
              key: database_user
        - name: MYSQL_PASSWORD
          valueFrom:
            secretKeyRef:
              name: mysql-secret
              key: database_password
        resources:
          requests:
            memory: "256Mi"
            cpu: "250m"
          limits:
            memory: "512Mi"
            cpu: "500m"
        volumeMounts:
        - name: mysql-persistent-storage
          mountPath: /var/lib/mysql
      volumes:
      - name: mysql-persistent-storage
        persistentVolumeClaim:     
          claimName: mysql-pvc