1.下載阿里雲映象repo檔案
專案使用CentOS6系統，因此我下載的檔案是：

# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client.  You should use this for CentOS updates
# unless you are
 
 manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the 
# remarked out baseurl= line instead.
#
#

[base]
name=CentOS-$releasever - Base - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/
        http
 
://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-6

#released updates 
[updates]
name=CentOS-$releasever - Updates - mirrors.aliyun.com
failovermethod=priority
 

baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
        http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-6

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
        http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-6

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/
        http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-6

#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/
        http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-6

2.重新整理快取

yum clean all
yum makecache

3.yum repolist

[[email protected] yum.repos.d]# yum repolist
已載入外掛：fastestmirror, security
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * extras: mirrors.aliyun.com
 * updates: mirrors.aliyun.com
倉庫標識倉庫名稱狀態
baseCentOS-6 - Base - mirrors.aliyun.com6,706
extras  CentOS-6 - Extras - mirrors.aliyun.com 46
updates CentOS-6 - Updates - mirrors.aliyun.com   826
repolist: 7,778

4.同步映象到本地

reposync -r base
reposync -r extras
reposync -r updates

5.建立YUM倉庫

yum installcreaterepo yum-utils -y
cd base
createrepo ./
cd ../extras
createrepo ./
cd ../updates
createrepo ./

6.安裝nginx，搭建本地Web伺服器
內容省略...
貼上配置檔案nginx.conf:

server {
    listen       80;
    server_name  localhost;
    root /yumrepo;
    #charset koi8-r;

    #access_log  logs/host.access.log  main;

    location / {
        autoindex on;
        autoindex_exact_size off;
        autoindex_localtime on;
    }

7.其他伺服器連線YUM倉庫：

vim /etc/yum.repos.d/test.repo

[base]
name=CentOS-Base(GDS)
baseurl=http://10.63.215.7/base
path=/
enabled=1
gpgcheck=0

[updates]
name=CentOS-Updates(GDS)
baseurl=http://10.63.215.7/updates
path=/
enabled=1
gpgcheck=0

[extras]
name=CentOS-Extras(GDS)
baseurl=http://10.63.215.7/extras
path=/
enabled=1
gpgcheck=0

8.完工！
上面的3個base，extras，updates下載到本地是11GB