报错

docker pull nginx
Using default tag: latest
Error response from daemon: Get "https://registry-1.docker.io/v2/": context deadline exceeded (Client.Timeout exceeded while awaiting headers)

方法一：换源

cat /etc/docker/daemon.json
{
"registry-mirrors":[
        "https://docker.m.daocloud.io",
        "https://registry.docker-cn.com",
        "https://docker.mirrors.ustc.edu.cn",
        "https://hub-mirror.c.163.com",
        "https://mirror.baidubce.com",
        "https://ccr.ccs.tencentyun.com",
        "https://mirror.ccs.tencentyun.com",
        "https://docker.mirrors.ustc.edu.cn",
        "https://docker.anyhub.us.kg",
        "https://dockerhub.jobcher.com",
        "https://dockerhub.icu"
    ]	
}

换完之后记得重启docker