Authentication problem when installing something - kubernetes-helm

Question

The command fails due to credentials problems, but when you test with kubectl get nodes everything looks fine.
Output of helm install:
⋊> ~/t/mtltech on master ⨯ helm install --name nginx-ingress stable/nginx-ingress --set rbac.create=true 00:31:41
Error: the server has asked for the client to provide credentials
Output of kubectl get nodes:
⋊> ~/t/mtltech on master ⨯ kubectl get nodes 00:37:41
NAME STATUS ROLES AGE VERSION
gke-mtltech-default-pool-977ee0b2-5lmi Ready <none> 7h v1.11.7-gke.4
gke-mtltech-default-pool-977ee0b2-hi4v Ready <none> 7h v1.11.7-gke.4
gke-mtltech-default-pool-977ee0b2-mjiv Ready <none> 7h v1.11.7-gke.4
Output of helm version:
Client: &version.Version{SemVer:"v2.13.0", GitCommit:"79d07943b03aea2b76c12644b4b54733bc5958d6", GitTreeState:"clean"}
Server: &version.Version{SemVer:"v2.13.0", GitCommit:"79d07943b03aea2b76c12644b4b54733bc5958d6", GitTreeState:"clean"}
Output of kubectl version:
Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.11", GitCommit:"637c7e288581ee40ab4ca210618a89a555b6e7e9", GitTreeState:"clean", BuildDate:"2018-11-26T14:38:32Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"11+", GitVersion:"v1.11.7-gke.4", GitCommit:"618716cbb236fb7ca9cabd822b5947e298ad09f7", GitTreeState:"clean", BuildDate:"2019-02-05T19:22:29Z", GoVersion:"go1.10.7b4", Compiler:"gc", Platform:"linux/amd64"}
Cloud Provider: Google Cloud
I've tried to reset it several times with rm -rf ~/.helm && helm init --service-account tiller but it doesn't change anything.
Any idea ?
Thanks.

Answer 1

The problem here is the Tiller. I do not know how you deployed Helm and Tiller, but the mistake was there.
I used this chart and all works correctly, then I deleted my service account and cluster role binding and I met the same error - deleting only cluster role binding gives error:
Error: release nginx-ingress failed: namespaces "default" is forbidden: User "system:serviceaccount:kube-system:tiller" cannot get namespaces in the namespace "default"
So the error is due to missing Service Account or both.
Solution for this:
rm -rf ~/.helm
kubectl create serviceaccount tiller --namespace kube-system
kubectl create clusterrolebinding tiller-cluster-rule \
--clusterrole=cluster-admin \
--serviceaccount=kube-system:tiller
helm init --service-account=tiller
kubectl get pods -n kube-system
check the full name of tiller pod:
kubectl delete pod -n kube-system tiller-deploy-xxx
Wait till the tiller pod will be redeployed and install your helm chart:
helm install --name nginx-ingress stable/nginx-ingress --set rbac.create=true