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$ curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -

$ cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb <httpshttps://apt.kubernetes.io/> kubernetes-xenial main
EOF

$ sudo apt-get update

$ sudo apt-get install -y kubelet kubeadm kubectl

# 패키지가 자동으로 설치, 업그레이드, 제거되지 않도록 hold함.
$ sudo apt-mark hold kubelet kubeadm kubectl

# 설치 완료 확인
$ kubeadm version
$ kubelet --version
$ kubectl version