首先进入/etc/docker/daemon.json文件

sudo vim /etc/docker/daemon.json

 多添加几个源：

{

"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://dockerproxy.com",

        "https://mirror.baidubce.com",

        "https://docker.m.daocloud.io",

        "https://docker.nju.edu.cn",

        "https://docker.mirrors.sjtug.sjtu.edu.cn",

        "https://docker.mirrors.ustc.edu.cn",

        "https://mirror.iscas.ac.cn",

        "https://docker.rainbond.cc"

    ]

}

然后在终端重新启动一下docker

systemctl daemon-reload 

systemctl restart docker

然后再拉镜像，成了！！！

参考：解决docker: Error response from daemon: Get "https://registry-1.docker.io/v2/": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers). - 星火撩原 - 博客园

docker报错——docker_Error response from daemon_Get "https://registry-1.docker.io/v2/" - Angry_Panda - 博客园 

在执行Dockerfile时出现Get https://registry-1.docker.io/v2/错误的解决方案_docker_达文西不辅助-云原生