http://www.dockone.io/article/1380
https://www.cnblogs.com/lixiaolun/p/7449017.html
为docker设置代理
创建目录
创建文件/etc/systemd/system/docker.service.d/http-proxy.conf，内容如下：
mkdir -p /etc/systemd/system/docker.service.d
vi /etc/systemd/system/docker.service.d/http-proxy.conf
[Service]
Environment="HTTP_PROXY=http://pill:pill@node2:3128/"
[root@host-10-1-1-71 harbor]# source /etc/profile
重启docker
systemctl daemon-reload
systemctl restart docker
验证docker代理是否设置成功
systemctl show --property=Environment docker
显示如下结果说明设置成功
Environment=GOTRACEBACK=crash HTTP_PROXY=http://pill:pill@node2:3128/