1. [从节点重新加入]
    3. kubeadm token create --print-join-command
    5. kubeadm join 192.168.0.109:6443 --token mgi1s2.f050udymydgaic9t     --discovery-token-ca-cert-hash sha256:1f3e68ec1f77fb963382483b0acbc1623137018b7a9b16d124c4bd475a38a3f8

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