今天遇到个报错：
docker: Error response from daemon: Get "https://registry.aliyuncs.com/v2/": dial tcp: lookup registry.aliyuncs.com on 100.100.100.100:53: read udp 100.115.220.43:42364->100.100.100.100:53: i/o timeout.
其实还是DNS的问题：
[root@iz2zeimmhbueqxvif1bzmqz cert]# ping registry.aliyuncs.com ping: registry.aliyuncs.com: 未知的名称或服务 [root@iz2zeimmhbueqxvif1bzmqz cert]# ping baidu.com ping: baidu.com: 未知的名称或服务
解决方案：
cp /etc/resolv.conf /etc/resolv.conf.bak echo "nameserver 223.5.5.5" > /etc/resolv.conf echo "nameserver 223.6.6.6" >> /etc/resolv.conf echo "nameserver 8.8.8.8" >> /etc/resolv.confchattr +i /etc/resolv.confping baidu.com -c 3