kubeadm init is thorwing the error unmarshaling JSON: while decoding JSON: json: unknown field "tls"

ajay.prajapati2691

sudo kubeadm init --config $USER_HOME/k8s_files/cluster_config.yaml
where cluster_config.yaml is
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
kubernetesVersion: "v1.21.1"
networking:
podSubnet: "172.16.0.0/24,fde1::/64"
serviceSubnet: "172.16.1.0/24,fde1::/112"
controllerManager:
extraArgs:
feature-gates: "IPv6DualStack=true"
apiServer:
extraArgs:
advertise-address: "172.16.2.1"

but on executing it , showing error as** error unmarshaling configuration schema.GroupVersionKind{Group:"kubeadm.k8s.io", Version:"v1beta2", Kind:"ClusterConfiguration"}: error unmarshaling JSON: while decoding JSON: json: unknown field "tls"**

chrispokorni

Hi @ajay.prajapati2691,

It is impossible to tell if anything is out of its place in your config file if it is not formatted as code block.
However, the latest release of the course material is on Kubernetes 1.28.1 (with installation instructions for 1.27.1 followed by an upgrade to 1.28.1). The apiVersion of the config file is dated also, the latest supported is v1beta3.

https://kubernetes.io/docs/reference/config-api/kubeadm-config.v1beta3/

Regards,
-Chris

ajay.prajapati2691

Thanks Chris, I will try to update the config file version .