问题：按照官方文档搭建ingress后，请求url都会返回301。
解决方法：
ingress.kubernetes.io/ssl-redirect: "false"
完整yaml文件：
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: nginx-ingress
namespace: default
annotations:
ingress.kubernetes.io/ssl-redirect: "false"
spec:
rules:
- http:
paths:
- path: /portal
backend:
serviceName: portal-service
servicePort: 6000
