最近安装Docker一直报这个错误，在网上寻找了很多方法，最终得到一个绝对能解决的方案

 修改/etc/docker/daemon.json文件

[root@localhost ~]# vim  /etc/docker/daemon.json
{
    "registry-mirrors": [
    "https://2a6bf1988cb6428c877f723ec7530dbc.mirror.swr.myhuaweicloud.com",
    "https://docker.m.daocloud.io",
    "https://hub-mirror.c.163.com",
    "https://mirror.baidubce.com",
    "https://your_preferred_mirror",
    "https://dockerhub.icu",
    "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"
    ]
}

[root@localhost ~]# sudo systemctl daemon-reload
[root@localhost sudo systemctl restart docker

重新拉取nginx镜像测试

[root@localhost ~]# docker pull nginx
Using default tag: latest
latest: Pulling from library/nginx
Digest: sha256:28402db69fec7c17e179ea87882667f1e054391138f77ffaf0c3eb388efc3ffb
Status: Image is up to date for nginx:latest
docker.io/library/nginx:latest
[root@localhost ~]# docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
nginx               latest              3b25b682ea82        3 weeks ago         192MB