istory-app-deploy.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name:  istory
  labels:
    app:  istory
spec:
  selector:
    matchLabels:
      app: istory
  replicas: 3
  template:
    metadata:
      labels:
        app: istory
    spec:
      initContainers:
        - name: check-mysql-ready
          image: mysql:8.0
          env:
            - name: MYSQL_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: istory-db-secret
                  key: MYSQL_PASSWORD
          command: ['sh',
                    '-c',
                    'until mysqladmin ping -u dangtong -p${MYSQL_PASSWORD} -h mysql-svc.default; do echo waiting for database; sleep 2; done;']
      containers:
        - name: istory
          image: dangtong/istory:12
          envFrom:
            - configMapRef:
                name: istory-app-config
          env:
            - name: spring.datasource.password
              valueFrom:
                secretKeyRef:
                  name: istory-db-secret
                  key: MYSQL_PASSWORD
            - name: spring.datasource.username
              valueFrom:
                configMapKeyRef:
                  name: istory-db-config
                  key: MYSQL_USER
          readinessProbe:
            httpGet:
              path: /actuator
              port: 8080
            initialDelaySeconds: 30
            timeoutSeconds: 3
            successThreshold: 2
            failureThreshold: 3
            periodSeconds: 10
          ports:
            - containerPort:  3306
              name: istory
      volumes:
        - name: application-config
          configMap:
            name: istory-app-config
      restartPolicy: Always