root@k8s-master:~# cat app.yaml
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-nginx
spec:
  selector:
    matchLabels:
      run: my-nginx
  replicas: 4
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 25%
  template:
    metadata:
      labels:
        run: my-nginx
    spec:
      containers:
      - name: apple-app
        image: hashicorp/http-echo:0.2.3
        imagePullPolicy: ""
        readinessProbe:
          httpGet:
             path: /
             port: 5679
          initialDelaySeconds: 5
          periodSeconds: 5
          successThreshold: 1
        args:
          - "-text=xxx"

---

apiVersion: v1
kind: Service
metadata:
  name: my-nginx
  labels:
    run: my-nginx
spec:
  ports:
  - port: 5678
    protocol: TCP
  selector:
    run: my-nginx