1.进入etc/docker/目录
[root@iZwz98nzsodcbigjqrrmxmZ ~]# cd /etc/docker/
2.在该目录下新建daemon.json文件
{
"registry-mirrors" : ["https://docker.mirrors.ustc.edu.cn"]
}
3.让镜像生效
[root@iZwz98nzsodcbigjqrrmxmZ docker]# systemctl daemon-reload
4.重启docker
[root@iZwz98nzsodcbigjqrrmxmZ docker]# systemctl restart docker