搭建centos7，8本地epel源本地使用
环境准备
1，vmware上准备好挂载需要的镜像比如6,7,8系统
2，挂载在centos8系统
3，需要用centos7下载epel镜像
4，制作成repodata数据源
5，从centos7远程拷贝到centos8挂载目录
注意：这里不讲解怎么制作base源，原因太过简单，差不多与epel相同
第一步，在centos7操作
yum install epel-release
第二步，大概需要一个小时左右
[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，拷贝数据到目标服务器上
[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 ~]#
使用机器验证
centos8下载epel源到本地操作，路径按照自己设置来
[root@localhost ~]# dnf reposync --repoid=epel --download-metadata -p /path
安装httpd并创建目录挂载
[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
永久挂载
[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
使用随便一台没有epel源的机器验证
[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
路径设置成了需要域名解析，所有需要机器配置都要设置域名解析，不然不会成功，例如：
[root@localhost ~]# vim /etc/hosts
[root@localhost ~]# cat !*
cat /etc/hosts
# yum
172.31.0.100 www.longxuan.top
win系统也要设置hosts如上
重新yum repolist就会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，不用到外网去epel源了
使用本地的epel源安装一个Nginx试试吧
[root@localhost ~]# yum install -y nginx
从上图看到简直不要太爽，但也有缺点，就是要是epel第三方有更新就不能直接更新
