kubectl versions Error: exec plugin is configured to use API version client.authentication.k8s.io/v1alpha1

Question

I was setting up my new Mac for my eks environment. After the installation of kubectl, aws-iam-authenticator and the kubeconfig file placement in default location. I ran the command kubectl command and got this error mentioned below in command block.

My cluster uses v1alpha1 client auth api version so basically i wanted to use the same one in my Mac as well.

I tried with latest version (1.23.0) of kubectl as well, still the same error. Whereas When i tried to do with aws-iam-authenticator (version 0.5.5) I was not able to download lower version.

Can someone help me to resolve it?

% kubectl version          
Client Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.0", GitCommit:"af46c47ce925f4c4ad5cc8d1fca46c7b77d13b38", GitTreeState:"clean", BuildDate:"2020-12-08T17:59:43Z", GoVersion:"go1.15.5", Compiler:"gc", Platform:"darwin/amd64"}
Unable to connect to the server: getting credentials: exec plugin is configured to use API version client.authentication.k8s.io/v1alpha1, plugin returned version client.authentication.k8s.io/v1beta1

Thanks and Regards, Saravana

Answer 1

I have the same problem

You're using aws-iam-authenticator 0.5.5 , AWS changed the way it behaves in 0.5.4 to require v1beta1 .

It depends on your configuration, but you can try to change the K8s context you're using to v1beta1 by checking your kubeconfig file (usually in ~/.kube/config ) from client.authentication.k8s.io/v1alpha1 to client.authentication.k8s.io/v1beta1

Otherwise switch back to aws-iam-authenticator 0.5.3 - you might need to build it from source if you're using the M1 architecture as there's no darwin-arm64 binary built for it

Answer 2

这对我使用 M1 芯片有用

sed -i .bak -e 's/v1alpha1/v1beta1/' ~/.kube/config

Answer 3

I also solved this by updating the apiVersion value in my kube config file ( ~/.kube/config ).

client.authentication.k8s.io/v1alpha1 to client.authentication.k8s.io/v1beta1

Answer 4

我用下面的命令解决了这个问题

aws eks update-kubeconfig --name mycluster 

Answer 5

Also make sure the AWS CLI version is up-to-date. Otherwise, AWS IAM Authenticator might not work with v1beta1:

curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install --update

Answer 6

This might be helpful to fix this issue for those who were using GitHub actions. For my situation I was using kodermax/kubectl-aws-eks with GitHub actions.

I added the KUBECTL_VERSION and IAM_VERSION environment variables for each steps using kodermax/kubectl-aws-eks to keep them in fixed versions.

  - name: deploy to cluster
    uses: kodermax/kubectl-aws-eks@master
    env:
      KUBE_CONFIG_DATA: ${{ secrets.KUBE_CONFIG_DATA_STAGING }}
      ECR_REGISTRY: ${{ steps.login-ecr.outputs.registry }}
      ECR_REPOSITORY: my-app
      IMAGE_TAG: ${{ github.sha }
      KUBECTL_VERSION: "v1.23.6"
      IAM_VERSION: "0.5.3"

Answer 7

Using kubectl 1.21.9 fixed it for me, with asdf:

asdf plugin-add kubectl https://github.com/asdf-community/asdf-kubectl.git
asdf install kubectl 1.21.9

And I would recommend having a .tools-versions file with:

kubectl 1.21.9

This question is a duplicate of error: exec plugin: invalid apiVersion "client.authentication.k8s.io/v1alpha1" CircleCI

Answer 8

Please change the authentication apiVersion from v1alpha1 to v1beta1 .

Old

apiVersion: client.authentication.k8s.io/v1alpha1

New

apiVersion: client.authentication.k8s.io/v1beta1

Answer 9

Sometimes this can happen if the Kube cache is corrupted (which happened in my case).

Deleting and recreating the below folder worked for me.

sudo rm -rf $HOME/.kube && mkdir -p $HOME/.kube