[Kubernetes] kubeadm join 에러

Token 인증 에러

분명 Master Node에서 kubeadm init하고 나온 출력문을 그대로 복붙했지만 에러가 발생했네요..?

에러 로그를 보아 하니 token 인증 실패가 떴습니다..흐음 그럼 재발급 받아야지요~뭐~

에러 로그

root@worker-node1:~# kubeadm join 10.41.2.156:6443 --token 65z741.dd70q5p4d17ch3cv \
>         --discovery-token-ca-cert-hash sha256:a6949071dd2204e2ae577f890f5c58b330b0055ee14773f70264789
	[preflight] Running pre-flight checks
	error execution phase preflight: couldn't validate the identity of the API Server: invalid discovery token CA certificate hash: invalid hash "sha256:a6949071dd2204e2ae577f890f5c58b330b0055ee14773f70264789", expected a 32 byte SHA-256 hash, found 27 bytes
	To see the stack trace of this error execute with --v=5 or higher

이슈 해결

• 왜인지 모를 Token 불일치!!에러!!!!
• Token 다시 생성하고 kubeadm join해 준다면 Master Node와 연결 완료! 간-단!

root@master-node1:~# kubeadm token list
	TOKEN                     TTL         EXPIRES                USAGES                   DESCRIPTION                                                EXTRA GROUPS
	65z741.dd70q5p4d17ch3cv   23h         2022-05-03T15:59:09Z   authentication,signing   The default bootstrap token generated by 'kubeadm init'.   system:bootstrappers:kubeadm:default-node-token
root@master-node1:~# kubeadm token delete 65z741.dd70q5p4d17ch3cv
	bootstrap token "65z741" deleted
root@master-node1:~# kubeadm token list
root@master-node1:~# kubeadm token create --print-join-command
	kubeadm join 10.41.2.156:6443 --token 0toaxd.7se6f4jxz6zlu1qr --discovery-token-ca-cert-hash sha256:a6949071dd2204e2ae577f890f5c58b330b0055ee14773f702647895be919c0a