1、配置阿里云kubernetes yum源
cat > /etc/yum.repos.d/kubernetes.repo << EOF
[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
yum makecache
2、查看支持版本
yum list kubelet --showduplicates
3、安装
k8sVersion=1.15.12
yum install -y kubelet-${k8sVersion} kubeadm-${k8sVersion} kubectl-${k8sVersion}
systemctl enable kubelet