centos 下创建本地镜像源，结合 nginx

1. 创建同步文件

参考清华的Centos源，配置同步文件。https://mirrors.tuna.tsinghua.edu.cn/help/centos/ 

[root@localhost centos]# cat centos-repo.conf
[base]
name=CentOS-$releasever - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=0
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=0
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=0
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=0
enabled=0
#gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

2. 同步源到本地文件夹（此文件夹需要结合nginx 配置成网络可访问的文件服务器：nginx location 配置详解）

[root@localhost centos]# reposync -c centos-repo.conf 

3. 创建 repo 

cd $i && createrepo .

4. 定时同步

crontab -e
1 2 * * * /usr/bin/reposync -np /home/centos

5. 重新配置镜像地址

本方法的一个例子，可以参考lustre文件系统安装 

参考链接：

https://www.cnblogs.com/juandx/p/6136621.html 

https://blog.csdn.net/u012402276/article/details/53158682

https://blog.csdn.net/moyuanbomo/article/details/81667006

可参考：可选配置文件

/usr/bin/reposync -np /home/centos -c centos-repo.conf