kubernetes ingress - proxying to a specific url

When the ingress is exposed externally but the server handling it is not a service inside kubernetes but a separate external server, set proxy_pass like below. (Really, if you get creative, anything nginx supports should work.)

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kind: Ingress
apiVersion: extensions/v1beta1
metadata:
  name: gitlab.test.com
  namespace: nginx-ingress
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/proxy-connect-timeout: '3600'
    nginx.ingress.kubernetes.io/proxy-read-timeout: '3600'
    nginx.ingress.kubernetes.io/proxy-send-timeout: '3600'
    nginx.ingress.kubernetes.io/send-timeout: '3600'
    nginx.ingress.kubernetes.io/server-snippet: |
      location ~ / {
         proxy_pass http://10.10.10.101:8084;
      }
spec:
  rules:
    - host: gitlab.test.com
      http:
        paths:
          - path: /
            backend:
              serviceName: nginx-ingress-default-backend
              servicePort: 8080
status:
  loadBalancer:
    ingress:
      - {}

The serviceName above is not a real service, it’s a dummy.
The annotations are added because of websockets. (Not needed if you don’t use websockets)

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    nginx.ingress.kubernetes.io/proxy-connect-timeout: '3600'
    nginx.ingress.kubernetes.io/proxy-read-timeout: '3600'
    nginx.ingress.kubernetes.io/proxy-send-timeout: '3600'
    nginx.ingress.kubernetes.io/send-timeout: '3600'