Kubernetes NGINX Ingress将HTTP请求从POST更改为GET [英] Kubernetes NGINX Ingress changes HTTP request from a POST to a GET

问题描述

我正在使用与Docker-for-Mac捆绑在一起的Kubernetes.我正在尝试配置一个Ingress，将以/v1/开头的http请求路由到我的后端服务，并将/ui/请求路由到我的Angular应用程序.

I'm using Kubernetes that is bundled with Docker-for-Mac. I'm trying to configure an Ingress that routes http requests starting with /v1/ to my backend service and /ui/ requests to my Angular app.

我的问题似乎是请求的HTTP方法是由Ingress(NGINX)从POST更改为GET.

My issues seems to be that the HTTP method of the requests are changed by ingress (NGINX) from a POST to a GET.

我尝试了各种重写规则，但无济于事.我什至从Mac的Docker切换到Minikube，但是结果是一样的.

I have tried various rewrite rules, but to no avail. I even switched from Docker-for-Mac to Minikube, but the result is the same.

如果我使用一个没有路径的简单入口(只是默认的后端)，则该服务将获取正确的HTTP方法. 下面的入口有效:

If I use a simple ingress with no paths (just the default backend) then the service is getting the correct HTTP method. The ingress below works:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress
spec:
  backend:
    serviceName: backend
    servicePort: 8080

但是此入口不会:<​​/p>

But this ingress does not:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress
  annotations:
    kubernetes.io/ingress.class: "nginx"

spec:
  rules:
  - http:
      paths:
      - path: /v1
        backend:
          serviceName: backend
          servicePort: 8080
      - path: /ui
        backend:
          serviceName: webui
          servicePort: 80

当我调试后端"服务时，我看到HTTP请求是GET而不是POST.

When I debug the "backend" service I see that the HTTP Request is a GET instead of a POST.

我读到某个地方，NGINX进行了重写，发出了308(永久)重定向，并且HTTP方法从GET更改为POST，但是如果是这种情况，我该如何配置我的入口以支持需要的不同服务的不同路径POST通话?

I read somewhere that NGINX rewrites issue a 308 (permanent) redirect and the HTTP method is changed from a GET to a POST, but if that is the case how can I configure my ingress to support different paths for different services that require POST calls?

推荐答案

我找到了解决问题的方法.当我在配置中添加host:时，http方法不会更改.这是我当前的入口Yaml(重写和正则表达式用于省略发送/v1作为后端URL的一部分)

I found the solution to my problem. When I add host: to the configuration then the http method is not changed. Here is my current ingress yaml (the rewrite and regex are used to omit sending the /v1 as part of the backend URL)

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress
  annotations:
    kubernetes.io/ingress.class: "nginx"
    nginx.ingress.kubernetes.io/rewrite-target: /$2
spec:
  rules:
  - host: localhost
    http:
      paths:
      - path: /v1(/|$)(.*)
        backend:
          serviceName: gateway
          servicePort: 8080

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