[root@ubuntu1804-1 /data/dockerfile/system/centos]#docker build -t centos7-base:v1 .

Delta RPMs disabled because /usr/bin/applydeltarpm not installed.
Could not resolve host: mirrors.cloud.aliyuncs.com; Unknown error

 

 

解决方法

apt install -y deltarpm
yum clean all
yum repolist