Ingress-nginx: how to set reverse proxy with ingress

[Jacksonary]

Is this a request for help?: yes

What keywords did you search in NGINX Ingress controller issues before filing this one?: proxy

---

FEATURE REQUEST :

NGINX Ingress controller version: V0.22.0

Kubernetes version (use kubectl version): v1.11.5

What happened: I want to add some reverse proxy in ingress, but I don't know how to deal with it. If use nginx, configuration like this:

    location / {
            proxy_pass http://xxx-prod-static.oss-internal.aliyuncs.com/xxx/resources/dist/index.html;
    }       

    location /resources/dist {
                rewrite ^/(.*)$ /bops/$1 break;
                proxy_pass http://xxx-prod-static.oss.aliyuncs.com;
        }

    location /bim-resource/ueditor {
            proxy_pass http://xxx-prod-static.oss-internal.aliyuncs.com/bim-resource/ueditor;
    }

and everything is ok. I tried to use and, but nothing worked. Thank you!

[ElvinEfendi]

You can use service of type ExternalName to achieve this: https://www.elvinefendi.com/2018/08/08/ingress-nginx-proxypass-to-external-upstream.html

[aledbf]

Closing. The previous comment is the right way to do this.

[Jacksonary]

@ElvinEfendi @aledbf Thank yo, I have tried that method, but it seems does not worked, it should caused by my cluster's version.

[joe-re]

It does not work for me too. It's related with cluster's version?
I couldn't find any information about it..

[Jacksonary]

@joe-re as previous comment, I have solve the problem，2 points you should try:

1. make user your version of kube support ExternalName service;
2. make a ingress to route your path to previous service;

my cofigure as follows,:

kind: Service
apiVersion: v1
metadata:
  name: hhu-static
spec:
  type: ExternalName
  # this is domian of oss, it will return CNAME to mapping this
  externalName: hhu-prod-static.oss-cn-beijing-internal.aliyuncs.com

---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: server-hhu
  annotations:
    kubernetes.io/ingress.class: nginx-ingress
spec:
  rules:
  - host: k8s-www.hhu.com
    http:
      paths:
      - path: /*
        backend:
          serviceName: hhu-static
          servicePort: 80

note: you must bind domain k8s-www.hhu.com to your oss bucket. I hope this can help you.

[joe-re]

@Jacksonary Thank you for your response.
Unfortunately it still does't work.
ingress-nginx controller always return 502.
Maybe I have to set dns name server to resolve my external service CNAME..?

Anyway I find one solution for that, server-snippet setting allows to add additional location header to nginx.conf.
I'm gonna try that. Thanks.

https://github.com/kubernetes/ingress-nginx/blob/master/docs/user-guide/nginx-configuration/annotations.md#server-snippet

[zheker]

you should define port for service with ExternaName type like:

```kind: Service
apiVersion: v1
metadata:
name: hhu-static
spec:
type: ExternalName
externalName: hhu-prod-static.oss-cn-beijing-internal.aliyuncs.com
ports:

• port: 443

[ak895912]

you should define port for service with ExternaName type like:

apiVersion: v1
metadata:
  name: hhu-static
spec:
  type: ExternalName
  externalName: hhu-prod-static.oss-cn-beijing-internal.aliyuncs.com
  ports:
  - port: 443

Hi I am facing error
Bad Request
Your browser sent a request that this server could not understand.
Reason: You're speaking plain HTTP to an SSL-enabled server port.
Instead use the HTTPS scheme to access this URL, please.

[Jacksonary]

@ak895912 it's up to the protocol of your oss's provider