报错信息：1.295 Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=container error was
1.295 14: curl#6 - "Could not resolve host: mirrorlist.centos.org; Unknown error"

在dockerfile中修改yum源配置

添加代码

RUN sed -i 's|^mirrorlist=|#mirrorlist=|g' /etc/yum.repos.d/CentOS-Base.repo && \sed -i 's|^#baseurl=http://mirror.centos.org|baseurl=http://mirrors.aliyun.com|g' /etc/yum.repos.d/CentOS-Base.repo && \yum clean all && yum -y makecache

再次构建即可