使用阿里云镜像加速器
[root@localhost ~]# /etc/docker
[root@localhost ~]# vi /etc/docker/daemon.json
{
"registry-mirrors": ["https://9cpn8tt6.mirror.aliyuncs.com"]
}
[root@localhost ~]# systemctl daemon-reload
[root@localhost ~]# systemctl restart docker
完美解决