环境 系统版本:Centos7 (vmware虚拟机) Docker版本:Docker version 19.03.12, build 48a66213fe 问题 [root@localhost docker]# docker pull portainer/portainer Using default tag: latest 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)解决 首先执行如下命令 vim /etc/resolv.conf将DNS地...