docker制作基础镜像，报错“Delta RPMs disabled because /usr/bin/applydeltarpm not installed，Could not resolve h

[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

标签：aliyuncs,because,mirrors,Unknown,RPMs,installed,报错
来源： https://www.cnblogs.com/weiweirui/p/13996647.html