问kubernetes获得502坏网关

EN

apiVersion: v1
kind: Service
metadata:
    name: api-cluster-ip-service
spec:
    type: ClusterIP
    selector:
        component: api
    ports:
        - port: 80
          targetPort: 5000


apiVersion: apps/v1
kind: Deployment
metadata:
  name: api-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      component: api
  template:
    metadata:
      labels:
        component: api
    spec:
      containers:
        - name: books-api
          image: mctabor/books-api
          ports:
            - containerPort: 5000


apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: books-ingress-service
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/rewrite-target: /$1
spec:
  rules:
    - http:
        paths:
          - path: /api/?(.*)
            backend:
              serviceName: api-cluster-ip-service
              servicePort: 80

if __name__ == "__main__":
app.run(host='0.0.0.0', port=5000)