cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

k8s_version=1.28
yum install -y kubelet-${k8s_version}.* kubectl-${k8s_version}.* kubeadm-${k8s_version}.*
systemctl enable kubelet
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc
####1.27以后版本需要执行如下命令
echo '' >/var/lib/kubelet/kubeadm-flags.env
echo '' >/etc/sysconfig/kubelet