- k8s-node1과 k8s-node2 모두 똑같이 설정하고 커맨드를 쳤는데
`kubeadm join 192.168.75.133:6443 --token 19zx2v.15rjjnquni2w7p4e --discovery-token-ca-cert-hash sha256:8a3fe31ec9a914e6eaf2fc9dc6c08403f504b80c37ba3bc309ecbb015a930980`
node를 연결하는 과정에서 k8s-node2에서 에러가 납니다.
에러는 다음과 같습니다.
'''
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml' error execution phase preflight: unable to fetch the kubeadm-config ConfigMap: this version of kubeadm only supports deploying clusters with the control plane version >= 1.21.0. Current version: v1.15.12 To see the stack trace of this error execute with --v=5 or higher
'''