K
Q

Enable underscores in headers on Azure ingress

10/29/2017

I have a problem with headers not forwarded into my services, I am not sure how support for Ingress was added, however I have the following Ingress service:

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: my-ingress
  annotations:
    ingress.kubernetes.io/rewrite-target: /
    "nginx.org/proxy-pass-headers": "custom_header"
spec:
  rules:
  - host: myingress.westus.cloudapp.azure.com
    http:
      paths:
      - path: /service1
        backend:
          serviceName: service1
          servicePort: 8080

However, my custom_header will not be forwarded. In nginx I set underscores_in_headers:

underscores_in_headers on;

How can I add this configuration into my ingress nginx service?

Thanks.

-- user1002065
azure
kubernetes

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3 Answers

2/13/2019

Whenever you install Nginx Ingress in Kubernetes weather from Helm Or manually, It always creates Controllers with it. Controllers are the primary containers that handles all the routing. These controller pods are defined in the deployments that resides in the Kube-System Namespace. This deployment is attached with a ConfigMap that as well reside in the Kube-System. Deployment that have Nginx Ingress Controllers definition.

Default Config Map that is Connected to Ingress Deployment.

Now all you have to do is to add your configuration in this Config Map file. Altered/Edited Config Map.

-- mkb_mc
Source: StackOverflow
8/17/2018

I've just changed "true" instead of "on", for nginx ingress controller , and workd for me . As mentioned here : https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/configmap/

apiVersion: v1

data: enable-underscores-in-headers: "true"

kind: ConfigMap

metadata:

name: nginx-configuration

namespace: ingress-nginx

labels:

app: ingress-nginx

kubectl apply -f configmap.yml

enter image description here

-- kartik
Source: StackOverflow
11/14/2017

According to ingress configmap spec you can use this header directly in configspec e.g.:

apiVersion: v1
data:
  enable-underscores-in-headers: "on"
kind: ConfigMap
metadata:
  name: nginx-configuration
  namespace: ingress-nginx
  labels:
    app: ingress-nginx

kubectl apply -f configmap.yml

Also there is an example of setting custom headers Did you try that?

-- vittore
Source: StackOverflow