[系统运维]自建yum仓库，分别为网络源和本地源

准备工作：光盘挂载目录

rpm -q autofs || yum -y install autofs
systemctl enable --now autofs

注：yum仓库指向的路径一定必须是repodata目录所在目录

#确认光盘已经挂载到/misc/cd目录下

[root@centos7 ~]#cd /misc/cd
[root@centos7 cd]#df /dev/sr0
Filesystem     1K-blocks    Used Available Use% Mounted on
/dev/sr0         9961428 9961428         0 100% /misc/cd

#将默认的yum仓库的配置文件做备份

[root@centos7 cd]#cd /etc/yum.repos.d/
[root@centos7 yum.repos.d]#ls
CentOS-Base.repo  CentOS-Debuginfo.repo  CentOS-Media.repo    CentOS-Vault.repo          epel.repo
CentOS-CR.repo    CentOS-fasttrack.repo  CentOS-Sources.repo  CentOS-x86_64-kernel.repo  epel-testing.repo

[root@centos7 yum.repos.d]#mkdir bak
[root@centos7 yum.repos.d]#mv *.repo bak/
[root@centos7 yum.repos.d]#ls
bak

#创建配置文件

[root@centos7 yum.repos.d]#vim base.repo
[root@centos7 yum.repos.d]#cat base.repo
[base]
name=CentOS
baseurl=file:///misc/cd
        https://mirrors.cloud.tencent.com/centos/$releasever/os/$basearch/
        https://mirrors.aliyun.com/centos/$releasever/os/$basearch/
        https://repo.huaweicloud.com/centos/$releasever/os/$basearch/
gpgcheck=0
enabled=1

[extras]
name=Extras
baseurl=https://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
        https://mirrors.cloud.tencent.com/centos/$releasever/extras/$basearch/
        https://repo.huaweicloud.com/centos/$releasever/extras/$basearch/
gpgcheck=0
enabled=1

[epel]
name=Epel
baseurl=https://mirrors.aliyun.com/epel/$releasever/$basearch/
        https://mirrors.cloud.tencent.com/epel/$releasever/$basearch/
        https://mirrors.huaweicloud.com/epel/$releasever/$basearch/
gpgcheck=0
enabled=1

#显示所有仓库

[root@centos7 yum.repos.d]#yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: 
 * epel: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
repo id                                                  repo name                                        status
base/7/x86_64                                            CentOS                                           10,072
epel/7/x86_64                                            Epel                                             13,692
extras/7/x86_64                                          Extras                                              500
repolist: 24,264