卸载已经安装的Docker

sudo yum remove docker \
                  docker-client \
                  docker-client-latest \
                  docker-common \
                  docker-latest \
                  docker-latest-logrotate \
                  docker-logrotate \
                  docker-selinux \
                  docker-engine-selinux \
                  docker-engine

添加阿里镜像

sudo yum install -y yum-utils device-mapper-persistent-data lvm2

sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

查看可以安装的docker版本

yum list docker-ce --showduplicates

安装18.03.1

sudo yum install docker-ce-18.03.1.ce

启动 Docker

systemctl enable docker
systemctl start docker

设置Docker阿里云加速器

sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://xxxxx.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

注意：需要替换xxxxx为你的阿里云加速器地址，该加速器地址获取方法可以参考我的另外一篇教程:配置Aliyun Docker加速器