光盘镜像挂载
上传或者从其它服务器scp传输镜像CentOS-7-x86_64-DVD-1908.iso到目标服务器/mnt目录下（我这里从集群中别的服务器scp过来的）：
scp传输命令(1024是服务器端口，需要改成你自己的，IP地址也是同样的需要修改)：
如果服务器上有镜像就不用管下面这条命令
scp -P 1024 -r CentOS-7-x86_64-DVD-1908.iso root@192.168.67.200:/mnt/
登录到目标服务器查看镜像
[root@localhost mnt]# ll total 4554750 -rw-r--r-- 8 root root 4664066080 Dec 5 2016 CentOS-7-x86_64-DVD-1908.iso
创建挂载目录
[root@localhost mnt]# mkdir /mnt/iso [root@localhost mnt]# ls 4554752 -rw-r--r-- 8 root root 4664066080 Dec 5 2016 CentOS-7-x86_64-DVD-1908.iso drwxr-xr-x 8 root root 2048 Dec 5 2016 iso
挂载镜像
[root@localhost mnt]# mount CentOS-7-x86_64-DVD-1908.iso /mnt/iso/ mount: /dev/sr0 is write-protected, mounting read-only
有的系统会提示错误需要使用mount -o loop -t iso9660
则将上面的mount语句换成下面语句：（如果你执行上面的mount语句不报错就跳过下面这条命令）
mount -o loop -t iso9660 CentOS-7-x86_64-DVD-1908.iso /mnt/iso
挂载完毕进入挂载目录查看
[root@localhost mnt]# cd iso/ [root@localhost iso]# ll total 654 -rw-r--r-- 1 root root 14 Dec 5 2016 CentOS_BuildTag drwxr-xr-x 3 root root 2048 Dec 5 2016 EFI -rw-r--r-- 1 root root 215 Dec 10 2015 EULA -rw-r--r-- 1 root root 18009 Dec 10 2015 GPL drwxr-xr-x 3 root root 2048 Dec 5 2016 images drwxr-xr-x 2 root root 2048 Dec 5 2016 isolinux drwxr-xr-x 2 root root 2048 Dec 5 2016 LiveOS drwxrwxr-x 2 root root 630784 Dec 5 2016 Packages drwxrwxr-x 2 root root 4096 Dec 5 2016 repodata -rw-r--r-- 1 root root 1690 Dec 10 2015 RPM-GPG-KEY-CentOS-7 -rw-r--r-- 1 root root 1690 Dec 10 2015 RPM-GPG-KEY-CentOS-Testing-7 -r--r--r-- 1 root root 2883 Dec 5 2016 TRANS.TBL
镜像已经被解压到挂载目录。
备份原始repo文件
创建备份目录
mkdir /etc/yum.repos.d/bak
移动文件
mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/bak/
创建新的repo文件
新建Centos-CDROM.repo文件
vi /etc/yum.repos.d/Centos-CDROM.repo [CDROM] name=CentOS-$releasever - CDROM baseurl=file:///mnt/iso gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
刷新repo信息
[root@localhost ~]# yum clean all Loaded plugins: fastestmirror, langpacks Cleaning repos: CDROM Cleaning up everything Cleaning up list of fastest mirrors [root@localhost ~]# yum makecache Loaded plugins: fastestmirror, langpacks CDROM | 3.6 kB 00:00:00 (1/4): CDROM/group_gz | 155 kB 00:00:00 (2/4): CDROM/primary_db | 3.0 MB 00:00:00 (3/4): CDROM/filelists_db | 3.0 MB 00:00:00 (4/4): CDROM/other_db | 1.3 MB 00:00:00 Determining fastest mirrors Metadata Cache Created
验证一下
[root@localhost ~]# yum -y install mariadb Loaded plugins: fastestmirror, langpacks Loading mirror speeds from cached hostfile Resolving Dependencies --> Running transaction check ---> Package mariadb.x86_64 1:5.5.52-1.el7 will be installed --> Processing Dependency: mariadb-libs(x86-64) = 1:5.5.52-1.el7 for package: 1:mariadb-5.5.52-1.el7.x86_64 --> Running transaction check ---> Package mariadb-libs.x86_64 1:5.5.52-1.el7 will be installed Removing mariadb-libs.x86_64 1:5.5.52-1.el7 - u due to obsoletes from installed mysql-community-libs-5.6.37-2.el7.x86_64 Removing mariadb.x86_64 1:5.5.52-1.el7 - u due to obsoletes from installed mysql-community-client-5.6.37-2.el7.x86_64 --> Restarting Dependency Resolution with new changes. --> Running transaction check ---> Package mariadb.x86_64 1:5.5.52-1.el7 will be installed ---> Package mariadb-libs.x86_64 1:5.5.52-1.el7 will be installed --> Finished Dependency Resolution
总结
可以看到没问题了，本地yum源已经可以使用了。