apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: db
  labels:
    component: db
spec:
  replicas: 1
  template:
    metadata:
      name: db
      labels:
        component: db
    spec:
      containers:
      - name: db-container
        image: mysql:8.0.3
        args:
        - --datadir
        - /var/lib/mysql/datadir
        env:
          - name: MYSQL_ROOT_PASSWORD
            valueFrom:
              secretKeyRef:
                name: metadata-db-secrets
                key: MYSQL_ROOT_PASSWORD
          - name: MYSQL_ALLOW_EMPTY_PASSWORD
            value: "true"
          - name: MYSQL_DATABASE
            value: "metadb"
        ports:
        - name: dbapi
          containerPort: 3306
        readinessProbe:
          exec:
            command:
            - "/bin/bash"
            - "-c"
            - "mysql -D $$MYSQL_DATABASE -p$$MYSQL_ROOT_PASSWORD -e 'SELECT 1'"
          initialDelaySeconds: 5
          periodSeconds: 2
          timeoutSeconds: 1
        volumeMounts:
        - name: metadata-mysql
          mountPath: /var/lib/mysql
      volumes:
      - name: metadata-mysql
        persistentVolumeClaim:
          claimName: metadata-mysql