I have a nginx ingress controller on aks which I configured using official guide. I also wanted to configure the nginx to allow underscores in the header so I wrote down the following configmap
apiVersion: v1
kind: ConfigMap
data:
enable-underscores-in-headers: "true"
metadata:
name: nginx-configuration
Note that I am using default namespace for nginx. However applying the configmap nothing seem to be happening. I see no events. What am I doing wrong here?
Name: nginx-configuration
Namespace: default
Labels: <none>
Annotations: kubectl.kubernetes.io/last-applied-configuration:
{"apiVersion":"v1","data":{"enable-underscores-in-headers":"true"},"kind":"ConfigMap","metadata":{"annotations":{},"name":"nginx-configura...
Data
====
enable-underscores-in-headers:
----
true
Events: <none>
The nginx ingress controller deployment refer to a ConfigMap which can be checked by describing the deployment.
args:
- /nginx-ingress-controller
- --configmap=$(POD_NAMESPACE)/nginx-configuration
You need to edit that configMap and add that parameter rather than creating new one.
kubectl edit cm nginx-configuration -n namespacename
Solution was to correctly name the configmap, firstly I did kubectl describe deploy nginx-ingress-controller which contained the configmap this deployment is looking for. In my case it was something like this --configmap=default/nginx-ingress-controller. I changed name of my configmap to nginx-ingress-controller. As soon I did that controller picked up the data from my configmap and changed the configuration inside my nginx pod.