Kubernetes入口-nginx保存源IP

Question

我在集群前面有一个vm。目前，它正在运行HAProxy (使用use-proxy-protocol: "true")。我的最终目标是允许与默认后端相关联的荚能够读取实际的源客户机源IP。

下面是打开use-proxy-protocol的示例日志：

10.244.0.0 - [10.244.0.0] - - [10/Jan/2018:23:06:42 +0000] "GET /platform/ping HTTP/1.1" 200 16 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/604.4.7 (KHTML, like Gecko) Version/11.0.2 Safari/604.4.7" 367 0.002 [upstream-default-backend] 10.244.3.101:80 16 0.002 200
10.244.0.0 - [10.244.0.0] - - [10/Jan/2018:23:06:59 +0000] "GET /platform/ping HTTP/1.1" 200 16 "-" "curl/7.54.0" 91 0.074 [upstream-default-backend] 10.244.3.101:80 16 0.074 200
10.244.0.0 - [10.244.0.0] - - [10/Jan/2018:23:09:51 +0000] "PROXY TCP4 127.0.0.1 127.0.0.1 43088 80" 400 173 "-" "-" 0 0.001 [] - - - -
10.244.0.0 - [10.244.0.0] - - [10/Jan/2018:23:09:59 +0000] "PROXY TCP4 127.0.0.1 127.0.0.1 43092 80" 400 173 "-" "-" 0 0.001 [] - - - -
10.244.0.0 - [10.244.0.0] - - [10/Jan/2018:23:10:09 +0000] "PROXY TCP4 127.0.0.1 127.0.0.1 43096 80" 400 173 "-" "-" 0 0.002 [] - - - -
I0110 23:11:42.050971       5 controller.go:211] backend reload required
I0110 23:11:42.054732       5 event.go:218] Event(v1.ObjectReference{Kind:"ConfigMap", Namespace:"ingress-nginx", Name:"nginx-configuration", UID:"7539f546-f599-11e7-bee6-fa163e2f1153", APIVersion:"v1", ResourceVersion:"127044", FieldPath:""}): type: 'Normal' reason: 'UPDATE' ConfigMap ingress-nginx/nginx-configuration
I0110 23:11:42.138901       5 controller.go:220] ingress backend successfully reloaded...
127.0.0.1 - [127.0.0.1] - - [10/Jan/2018:23:11:56 +0000] "GET /platform/ping HTTP/1.1" 200 16 "-" "curl/7.47.0" 86 0.003 [upstream-default-backend] 10.244.3.101:80 16 0.003 200
142.xx.xxx.xx - [142.xx.xxx.xx] - - [10/Jan/2018:23:15:50 +0000] "GET / HTTP/1.1" 500 21 "-" "curl/7.47.0" 78 0.020 [upstream-default-backend] 10.244.3.101:80 21 0.020 500
142.xx.xxx.xx - [142.xx.xxx.xx] - - [10/Jan/2018:23:16:02 +0000] "GET /platform/bitcoin HTTP/1.1" 200 45 "-" "curl/7.47.0" 94 0.165 [upstream-default-backend] 10.244.3.101:80 45 0.165 200
216.249.49.20 - [216.249.49.20] - - [10/Jan/2018:23:16:16 +0000] "GET / HTTP/1.1" 500 21 "-" "curl/7.54.0" 78 0.002 [upstream-default-backend] 10.244.3.101:80 21 0.002 500
216.249.49.20 - [216.249.49.20] - - [10/Jan/2018:23:16:30 +0000] "GET /platform/bitcoin HTTP/1.1" 200 45 "-" "curl/7.54.0" 94 0.002 [upstream-default-backend] 10.244.3.101:80 45 0.002 200
216.249.49.20 - [216.249.49.20] - - [10/Jan/2018:23:16:43 +0000] "GET /platform/bitcoin HTTP/1.1" 200 45 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/604.4.7 (KHTML, like Gecko) Version/11.0.2 Safari/604.4.7" 370 0.049 [upstream-default-backend] 10.244.3.101:80 45 0.049 200
216.249.49.20 - [216.249.49.20] - - [10/Jan/2018:23:16:44 +0000] "GET /favicon.ico HTTP/1.1" 404 9 "http://142.xx.xxx.xx/platform/bitcoin" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/604.4.7 (KHTML, like Gecko) Version/11.0.2 Safari/604.4.7" 324 0.013 [upstream-default-backend] 10.244.3.101:80 9 0.013 404
216.249.49.20 - [216.249.49.20] - - [10/Jan/2018:23:17:04 +0000] "GET /platform/bitcoin HTTP/1.1" 200 45 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/604.4.7 (KHTML, like Gecko) Version/11.0.2 Safari/604.4.7" 370 0.002 [upstream-default-backend] 10.244.3.101:80 45 0.002 200
216.249.49.20 - [216.249.49.20] - - [10/Jan/2018:23:17:07 +0000] "GET /platform/ping HTTP/1.1" 200 16 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/604.4.7 (KHTML, like Gecko) Version/11.0.2 Safari/604.4.7" 367 0.002 [upstream-default-backend] 10.244.3.101:80 16 0.002 200
216.249.49.20 - [216.249.49.20] - - [10/Jan/2018:23:17:56 +0000] "GET /platform/ping HTTP/1.1" 200 16 "-" "curl/7.54.0" 91 0.002 [upstream-default-backend] 10.244.3.101:80 16 0.002 200
Logs from 1/10/18 10:17 PM to 1/10/18 11:17 PM UTC

142.xx.xxx.xx是HAProxy vm的IP。

216.249.49.20是一所大学的外部知识产权。正如您所看到的，入口荚可以很好地读取来自HAProxy的外部IP和use-proxy-protocol: "true"。

但是，当我缩小HAProxy vm的地址时，我得到：

demonfuse@Williams-MacBook-Pro ~/N/K/NGINX> curl 142.xx.xxx.xx/platform/ping
pong2 10.244.2.6   

10.244.2.6为进口豆荚的IP。我很有信心，在这一点上，ingress nginx有真正的来源IP.。

有没有办法通过configmap将头和真正的源IP转发到入口-nginx后面的豆荚？从我可以告诉这里的情况来看，大多数应该默认打开。

如何复制

1. 按照指南这里在全新集群上安装入口-nginx
2. 将流量从HAProxy /外部负载均衡器重定向到入口-nginx
3. 围棋脚本

如下所示：

import (
        "github.com/kataras/iris"
        "github.com/kataras/iris/context"
        //...
    )

    func main() {
        app := iris.New()
            app.Get("/platform/ping", func(ctx context.Context) {
            fmt.Println("connected with " + ctx.RemoteAddr() + "!")
            ctx.WriteString("pong2 " + ctx.RemoteAddr())
        })

        //...

        app.Run(iris.Addr(":80"), iris.WithoutServerError(iris.ErrServerClosed))
    }

附加信息：

环境：Internet -> Dedicated HAProxy VM -> Bare metal OVH K8S Cluster (1 master, 2 worker)

configmap.yaml

apiVersion: v1
data:
  proxy-set-headers: "ingress-nginx/custom-headers"
  use-proxy-protocol: "true"
kind: ConfigMap
metadata:
  name: nginx-configuration
  namespace: ingress-nginx
  labels:
    app: ingress-nginx

custom_headers.yaml

apiVersion: v1
data:
  X-Forwarded-For: "142.xx.xxx.xxx"
kind: ConfigMap
metadata:
  name: custom-headers
  namespace: ingress-nginx

haproxy配置

global
   maxconn 4096
   log 127.0.0.1 local0 notice
   maxconn 2000
   user haproxy
   group haproxy

defaults
   log   global
   mode   http
   retries   3
   option redispatch
   maxconn   2000
   timeout connect 5000
   timeout client  50000
   timeout server  50000

frontend TestServerTest
    bind 142.xx.xxx.xxx:80
    mode tcp
    default_backend TestServernodes

backend TestServernodes
    mode tcp
    server TestServer01 142.xx.xxx.xxx:80 send-proxy

我在哪里和怎么犯了一个错误？

我尝试将与内部入口IP、与入口服务相关联的外部IP以及HAProxy vm的公共IP结合起来。到目前为止，卷曲HAProxy的外部IP仍然返回pong2 10.244.2.6 (入口荚的内部IP )。

Answer 1

我想出来了！问题在于Iris web框架，与ingress没有什么关系。

解决方案是在ctx.Application().ConfigurationReadOnly().GetRemoteAddrHeaders()中手动读取远程标头。默认情况下，Iris框架不检查X-Forwarded-For和X-Real-Ip

希望这对那些在库伯奈特之间运行反向代理的人是有用的。