環境准備
1，vmware上准備好掛載需要的鏡像比如6,7,8系統
2，掛載在centos8系統
3，需要用centos7下載epel鏡像
4，制作成repodata數據源
5，從centos7遠程拷貝到centos8掛載目錄
注意：這里不講解怎么制作base源，原因太過簡單，差不多與epel相同
第一步，在centos7操作
yum install epel-release
第二步，大概需要一個小時左右
[root@localhost ~]# reposync -r epel -p /root/
第三步，制作成repodata
[root@localhost ~]# yum -y install createrepo
[root@localhost ~]# createrepo -v /root/epel
[root@localhost ~]# ls
anaconda-ks.cfg epel
[root@localhost ~]# cd epel/
[root@localhost epel]# ls
Packages repodata
第四步，拷貝數據到目標服務器上
[root@localhost ~]# scp -rv epel/ 172.31.0.100:/var/www/html/epel/centos7
...
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: channel 0: free: client-session, nchannels 1
debug1: fd 0 clearing O_NONBLOCK
debug1: fd 1 clearing O_NONBLOCK
Transferred: sent 17431826984, received 4855652 bytes, in 425.1 seconds
Bytes per second: sent 41005321.5, received 11422.1
debug1: Exit status 0
[root@localhost ~]#
使用機器驗證
centos8下載epel源到本地操作，路徑按照自己設置來
[root@localhost ~]# dnf reposync --repoid=epel --download-metadata -p /path
安裝httpd並創建目錄掛載
[root@localhost ~]# cd /var/www/html/
[root@localhost html]# mkdir centos/{6,7,8} -p
[root@localhost centos]# mount /dev/sr0 /var/www/html/centos/8
[root@localhost centos]# mount /dev/sr1 /var/www/html/centos/7
[root@localhost centos]# mount /dev/sr2 /var/www/html/centos/6
永久掛載
[root@localhost epel]# cat /etc/fstab
/dev/sr0 /var/www/html/centos/8 iso9660 defaults 0 0
/dev/sr1 /var/www/html/centos/7 iso9660 defaults 0 0
/dev/sr2 /var/www/html/centos/6 iso9660 defaults 0 0
使用隨便一台沒有epel源的機器驗證
[root@localhost ~]# cat /etc/yum.repos.d/centos7.repo
[base]
name=base
baseurl=http://www.longxuan.top/centos/7/
gpgcheck=0
enabled=1
[epel]
name=epel
baseurl=http://www.longxuan.top/epel/centos7/epel/
gpgcheck=0
enabled=1
路徑設置成了需要域名解析，所有需要機器配置都要設置域名解析，不然不會成功，例如：
[root@localhost ~]# vim /etc/hosts
[root@localhost ~]# cat !*
cat /etc/hosts
# yum
172.31.0.100 www.longxuan.top
win系統也要設置hosts如上
重新yum repolist就會看到上面制作的本地epel源了
[root@localhost ~]# yum repolist
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
repo id repo name status
!base base 0
!epel epel 0
repolist: 0
[root@localhost ~]# yum clean all
Loaded plugins: fastestmirror
Cleaning repos: base epel
Cleaning up list of fastest mirrors
Other repos take up 46 M of disk space (use --verbose for details)
[root@localhost ~]# yum repolist
Loaded plugins: fastestmirror
Determining fastest mirrors
base | 3.6 kB 00:00:00
epel | 2.9 kB 00:00:00
(1/3): epel/primary_db | 6.8 MB 00:00:00
(2/3): base/group_gz | 166 kB 00:00:00
(3/3): base/primary_db | 3.1 MB 00:00:00
repo id repo name status
base base 4,021
epel epel 13,584
repolist: 17,605
到此本地搭建完成，不用到外網去epel源了
使用本地的epel源安裝一個Nginx試試吧
[root@localhost ~]# yum install -y nginx
從上圖看到簡直不要太爽，但也有缺點，就是要是epel第三方有更新就不能直接更新