问题描述
在 Centos7 系统下 docker 镜像拉取失败、报错
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) 之类

解决方案
vim 打开 /etc/resolv.conf

sudo vi /etc/resolv.conf

将 nameserver 改为 8.8.8.8

重启 docker

sudo systemctl restart docker

再重新运行 docker 拉取镜像命令