将参数向下传递到 ingress-nginx 中的永久重定向

Question

我正在使用 nginx.ingress.kubernetes.io/permanent-redirect: https://www.google.com，但想在重定向中的 / 之后传递参数。但是不能让它与纯 ingress-nginx 一起工作，如果你可以设置 /$1 或类似的东西，那就太好了。这可能与其他注释或技巧混合使用吗？

例如 https://www.example.com/hello

应该重定向到 https://www.google.com/hello

Answer 1

可以使用以下 ingress.kubernetes.io/configuration-snippet 配置进行这种重定向：

我的ingress.yaml:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:                                                                                                                                                  
  name: ingress-redirect
  annotations:
    nginx.ingress.kubernetes.io/server-snippet: |
      return 301 http://www.google.com$request_uri;
spec:
  rules:
  - host: www.example.com
    http:
      paths:
      - path: /
        backend:
          serviceName: servicename
          servicePort: 80

应用入口配置：

$ kubectl apply -f ingress.yaml
ingress.extensions/ingress-redirect created

验证入口配置并检查其 address。

$ kubectl describe ingress
Name:             ingress-redirect
Namespace:        default
Address:          10.156.0.33
Default backend:  default-http-backend:80 (<none>)
Rules:
  Host             Path  Backends
  ----             ----  --------
  www.example.com  
                   /   my-nginx:80 (<none>)
Annotations:
  kubectl.kubernetes.io/last-applied-configuration:  {"apiVersion":"extensions/v1beta1","kind":"Ingress","metadata":{"annotations":{"nginx.ingress.kubernetes.io/server-snippet":"return 301 http://www.google.com$request_uri;                                                                                                        \n"},"name":"ingress-redirect","namespace":"default"},"spec":{"rules":[{"host":"www.example.com","http":{"paths":[{"backend":{"serviceName":"my-nginx","servicePort":80},"path":"/"}]}}]}}

  nginx.ingress.kubernetes.io/server-snippet:  return 301 http://www.google.com$request_uri;                                                                                                        

Events:
  Type    Reason  Age                From                      Message
  ----    ------  ----               ----                      -------
  Normal  CREATE  33m                nginx-ingress-controller  Ingress default/ingress-redirect
  Normal  UPDATE  30m (x2 over 33m)  nginx-ingress-controller  Ingress default/ingress-redirect

最后测试 if 重定向是否有效：

$ curl -v http://10.156.0.33/test/with?some=query -H "Host: www.example.com"
*   Trying 10.156.0.33...
* TCP_NODELAY set
* Connected to 10.156.0.33 (10.156.0.33) port 80 (#0)
> GET /test/with?some=query HTTP/1.1
> Host: www.example.com
> User-Agent: curl/7.52.1
> Accept: */*
> 
< HTTP/1.1 301 Moved Permanently
< Server: openresty/1.15.8.2
< Date: Wed, 27 Nov 2019 13:03:08 GMT
< Content-Type: text/html
< Content-Length: 175
< Connection: keep-alive
< Location: http://www.google.com/test/with?some=query
< 
<html>
<head><title>301 Moved Permanently</title></head>
<body>
<center><h1>301 Moved Permanently</h1></center>
<hr><center>openresty/1.15.8.2</center>
</body>
</html>
* Curl_http_done: called premature == 0
* Connection #0 to host 10.156.0.33 left intact

确保您的 ingress-controller 运行正确并为 ingress 分配了 IP 地址。请注意，即使没有端点服务，重定向也能正常工作。

Answer 2

出奇的简单：

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: test-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
    nginx.ingress.kubernetes.io/permanent-redirect: http://www.google.com$request_uri
spec:
  rules:
  - host: www.example.com
    http:
      paths:
      - path: /testpath
        pathType: Prefix
        backend:
          serviceName: test
          servicePort: 80

在nginx.conf中会导致这样的事情：

if ($uri ~* /) {
        return 301 http://www.google.com$request_uri;
}

看来您可以在地址中使用任何 nginx variable。所以我想你也可以做 $scheme://www.google.com$request_uri 之类的事情:)

我首先尝试了一个 nginx.ingress.kubernetes.io/server-snippet 块，就像这里另一个答案中建议的那样，但是 redirect 301 http://www.google.com$request_uri; 在 nginx.conf 中劫持了太多，并停止了 cert-manager 的工作。所以我需要一个更好的集成解决方案。

如果要调试，自己看nginx.conf就可以了，真的很简单：

$ kubectl exec -n nginx-ingress nginx-ingress-controller-*** -- cat /etc/nginx/nginx.conf

将参数向下传递到 ingress-nginx 中的永久重定向

Passing parameters down to permanent redirect in ingress-nginx

nginx

kubernetes

nginx-ingress