docker执行yum报错Could not resolve host: mirrorlist.centos.org

解决办法：

    -- 依次执行以下命令cd /etc/yum.repos.d/sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*yum update -yecho "export LC_ALL=en_US.utf8"  >>  /etc/profileecho "export LC_CTYPE=en_US.utf8"  >>  /etc/profilesource /etc/profileyum install -y net-tools