阿里云的镜像加速器已经停止服务了，历经艰辛终于在网上找到了可以用的docker镜像源了
vim /etc/docker/daemon.json 贴入如下内容：
{
"registry-mirrors" : [
"https://docker.registry.cyou",
"https://docker-cf.registry.cyou",
"https://dockercf.jsdelivr.fyi",
"https://docker.jsdelivr.fyi",
"https://dockertest.jsdelivr.fyi",
"https://mirror.aliyuncs.com",
"https://mirror.baidubce.com",
"https://docker.m.daocloud.io",
"https://docker.mirrors.sjtug.sjtu.edu.cn",
"https://docker.mirrors.ustc.edu.cn",
"https://gst6rzl9.mirror.aliyuncs.com",
"https://registry.docker-cn.com",
"http://hub-mirror.c.163.com",
"http://mirrors.ustc.edu.cn/",
"https://mirrors.tuna.tsinghua.edu.cn/",
"https://1i2gr0x5.mirror.aliyuncs.com",
],
"insecure-registries" : [
],
"debug": true,
"experimental": false
}
成功以后重启docker然后用docker info查看是否生效