服务器自建yum源

rm /etc/yum.repos.d/*.repo

mkdir /mnt

mount -t iso9660 -o loop /data/centos_iso/CentOS-7-x86_64-DVD-2009.iso  /mnt

mkdir -p /data/repos/centos

cp -r /mnt/Packages /data/repos/centos/

cp -r /mnt/repodata /data/repos/centos/

        server {
                listen 65530;
                server_name localhost;
                location /centos {
                        autoindex on;
                        autoindex_localtime on;
                        autoindex_exact_size off;
                        root /data/repos;
                }
        }

cd /etc/yum.repos.d/
vi centos.repo

[centos]
name=centos
baseurl=http://192.192.1.230:65530/centos/
enabled=1
gpgcheck=0

yum clean all
yum makecache