cant create a second ingress controller using helm with custom class in Azure k8s cluster

Question

I have created an ingress controller using Helm with default configuration

default        nginx-ingress-controller        LoadBalancer   10.0.182.128   xx.xxx.xx.90     80:32485/TCP,443:31756/TCP   62m
default        nginx-ingress-default-backend   ClusterIP      10.0.12.39     <none>           80/TCP                       62m

using Helm:

helm install nginx-ingress stable/nginx-ingress \         
--set controller.replicaCount=2 \     
--set controller.nodeSelector."beta\.kubernetes\.io/os"=linux \
--set defaultBackend.nodeSelector."beta\.kubernetes\.io/os"=linux \
--set controller.service.loadBalancerIP="Created static IP" \
--set controller.service.annotations."service\.beta\.kubernetes\.io/azure-dns-label-name"="XXX-aks-ingress"

this ingress is running in the default namespace.

Now, I wanted to add a second ingress controller, from the official doc I have specific Ingress class

helm install nginx-ingress stable/nginx-ingress \     
--namespace ingress-nginx-devices \ #I create this namespace first 
--set controller.ingressClass="nginx-devices" \   # custom class to use for different ingress resources  
--set controller.replicaCount=2 \     
--set controller.nodeSelector."beta\.kubernetes\.io/os"=linux \
--set defaultBackend.nodeSelector."beta\.kubernetes\.io/os"=linux \
--set controller.service.loadBalancerIP="A second static Ip address created before" \
--set controller.service.annotations."service\.beta\.kubernetes\.io/azure-dns-label-name"="serviceIot-aks-ingress-iot"

but I keep getting this error:

Error: rendered manifests contain a resource that already exists. Unable to continue with install: ClusterRole "nginx-ingress" in namespace "" exists and cannot be imported into the current release: invalid ownership metadata; annotation validation error: key "meta.helm.sh/release-namespace" must equal "ingress-nginx-devices": current value is "default"

What could be wrong here ? Any help is appreciated :)

Answer 1

you can try, what we are changing is name : nginx-ingress-devices instead of nginx-ingress

helm install nginx-ingress-devices stable/nginx-ingress \     
--namespace ingress-nginx-devices \ #I create this namespace first 
--set controller.ingressClass="nginx-devices" \   # custom class to use for different ingress resources  
--set controller.replicaCount=2 \     
--set controller.nodeSelector."beta\.kubernetes\.io/os"=linux \
--set defaultBackend.nodeSelector."beta\.kubernetes\.io/os"=linux \
--set controller.service.loadBalancerIP="A second static Ip address created before" \
--set controller.service.annotations."service\.beta\.kubernetes\.io/azure-dns-label-name"="serviceIot-aks-ingress-iot"

error you are getting is due to already there is cluster role with same name : nginx-ingress due to that you are getting the error.

ClusterRoleBindings grant a user, group, or service account a ClusterRole’s power across the entire cluster.

You can get the reference file here : https://github.com/helm/charts/blob/master/stable/nginx-ingress/templates/clusterrole.yaml

Answer 2

For my case the issue was with ingressclass existed already. I have simply deleted the ingresclass and it worked like a charm.

# kubectl get ingressclass --all-namespaces

This will return the name of already existing ingressclass. For my case, it was nginx. Delete that ingressclass.

# kubectl delete ingressclass nginx --all-namespaces

Verify that ingressclass is deleted

# kubectl get ingressclass --all-namespaces
No resources found

Rerun the helm update command should work.