server.go:218] unable to load client CA file /etc/kubernetes/pki/ca.crt: open /etc/kubernetes/pki/ca.crt: no such file or directory
根據github上的說法。
You have to initialize the kubelet config before it will start successfully. That is typically done with kubeadm init or kubeadm join
需要運行kubeadm init 產生配置文件後，再啓動kubelet才能成功，所以和這個報錯可以忽略。