How to use ConfigMap configuration with Helm NginX Ingress controller - Kubernetes

Question

I've found a documentation about how to configure your NginX ingress controller using ConfigMap: https://kubernetes.github.io/ingress-nginx/user-guide/nginx-configuration/configmap/

Unfortunately I've no idea and couldn't find it anywhere how to load that ConfigMap from my Ingress controller.

My ingress controller:

helm install --name ingress --namespace ingress-nginx --set rbac.create=true,controller.kind=DaemonSet,controller.service.type=ClusterIP,controller.hostNetwork=true stable/nginx-ingress 

My config map:

kind: ConfigMap apiVersion: v1 metadata:   name: ingress-configmap data:   proxy-read-timeout: "86400s"   client-max-body-size: "2g"   use-http2: "false" 

My ingress:

apiVersion: extensions/v1beta1 kind: Ingress metadata:   name: ingress   annotations:     nginx.ingress.kubernetes.io/backend-protocol: "HTTPS" spec:   tls:     - hosts:         - my.endpoint.net       secretName: ingress-tls   rules:     - host: my.endpoint.net       http:         paths:           - path: /             backend:               serviceName: web               servicePort: 443           - path: /api             backend:               serviceName: api               servicePort: 443 

How do I make my Ingress to load the configuration from the ConfigMap?

Answer 1

I've managed to display what YAML gets executed by Helm using the: --dry-run --debug options at the end of helm install command. Then I've noticed that there controller is executed with the: --configmap={namespace-where-the-nginx-ingress-is-deployed}/{name-of-the-helm-chart}-nginx-ingress-controller. In order to load your ConfigMap you need to override it with your own (check out the namespace).

kind: ConfigMap apiVersion: v1 metadata:   name: {name-of-the-helm-chart}-nginx-ingress-controller   namespace: {namespace-where-the-nginx-ingress-is-deployed} data:   proxy-read-timeout: "86400"   proxy-body-size: "2g"   use-http2: "false" 

The list of config properties can be found here.

Answer 2

One can pass config mag properties at the time of installation too:

helm install stable/nginx-ingress --name nginx-ingress --set controller.config.use-forwarded-headers='"true"' 

NOTE: for non-string values had to use single quotes around double quotes to get it working.