自建yum仓库，分别为网络源和本地源

1、配置网络源（此处使用阿里源为例）

#备份原有yum配置文件
cp /etc/yum.repo.d
mkdir back
cp CentOS*  pe*  back

#下载阿里云的镜像到/etc/yum.repos.d/
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

2、创建文件夹，挂载本地光盘，拷贝rpm包到/mnt/yum

mkdir /mnt/cdrom
mount /dev/cdrom /mnt/cdrom
cp /mnt/cdrom/Packages/* /mnt/yum

3、创建yum仓库

createrepo -v /mnt/yum

4、编辑/etc/yum.repo.d/CentOS-Base.repo文件设置本地源

#在网络源前面添加
[base-local]
name=Centos
baseurl=file:///mnt/yum
enable=1
gpgckeck=0

5、使用yum repolist 查看仓库

yum repolist
已加载插件：fastestmirror, langpacks
Repository base is listed more than once in the configuration
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
源标识                                                             源名称                                                                                     状态
base/7/x86_64                                                      CentOS-7 - Base - mirrors.aliyun.com                                                       10,097
base-local                                                         Centos                                                                                      4,021
extras/7/x86_64                                                    CentOS-7 - Extras - mirrors.aliyun.com                                                        307
updates/7/x86_64                                                   CentOS-7 - Updates - mirrors.aliyun.com                                                     1,010
repolist: 15,435