CentOS搭建本地YUM源

为了减少公司内部大量vps使用外部yum源导致带宽不足情况，于是就搭建一台本地yum源服务器，通过脚本服务器定时去镜像站点更新yum数据。

1. 建立yum源存放路径(本文以搭建CentOS 5,6,7YUM源为例)

#分别创建5,6,7三个文件夹
$ mkdir -p /cache1/{5,6,7}

2. 创建获取镜像站点数据脚本/CentOS/sysyum.sh(本文选用的是rsync.mirrors.ustc.edu.cn镜像站点)

#!/bin/bash  
*****************************CentOS5*****************************
/usr/bin/rsync -avzL --exclude=addons --exclude=centosplus --exclude=contrib --exclude=cr --exclude=fasttrack --exclude=isos --exclude=RELEASE-NOTES* --exclude=i386 --exclude=*i386.rpm --exclude=repodata rsync://rsync.mirrors.ustc.edu.cn/centos/5/ /cache1/5
for i in /cache1/5/extras/x86_64 /cache1/5/os/x86_64 /cache1/5/updates/x86_64 ; 
do 
/bin/rm $i/repodata -rf && /usr/bin/createrepo -s sha --workers 8 $i ;
done
/usr/bin/rsync -avzL --exclude=i386 --exclude=ppc --exclude=repodata --exclude=repoview --exclude=SRPMS rsync://rsync.mirrors.ustc.edu.cn/epel/5 /cache1/epel/
for i in /cache1/epel/5/x86_64 ; 
do 
/bin/rm $i/repodata -rf && /usr/bin/createrepo -s sha --worker 8 $i ;
done
*****************************CentOS6*****************************
/usr/bin/rsync -avzL --exclude=addons --exclude=centosplus --exclude=contrib --exclude=cr --exclude=fasttrack --exclude=isos --exclude=sclo --exclude=storage --exclude=virt --exclude=cloud --exclude=RELEASE-NOTES* --exclude=i386 --exclude=*i386.rpm --exclude=repodata --exclude=SCL --exclude=xen4 rsync://rsync.mirrors.ustc.edu.cn/centos/6/ /cache1/6
for i in /cache1/6/extras/x86_64 /cache1/6/os/x86_64 /cache1/6/updates/x86_64 ; 
do 
/bin/rm $i/repodata -rf && /usr/bin/createrepo --workers 8 $i ;
done
/usr/bin/rsync -avzL --exclude=i386 --exclude=ppc64 --exclude=repodata --exclude=repoview --exclude=SRPMS rsync://rsync.mirrors.ustc.edu.cn/epel/6 /cache1/epel/
for i in /cache1/epel/6/x86_64 ;
 do 
/bin/rm $i/repodata -rf && /usr/bin/createrepo --worker 8 $i ;
done
*****************************CentOS7*****************************
/usr/bin/rsync -avzL --exclude=atomic --exclude=centosplus --exclude=contrib --exclude=cloud  --exclude=cr --exclude=fasttrack --exclude=isos --exclude=paas --exclude=sclo --exclude=virt --exclude=storage --exclude=RELEASE-NOTES* --exclude=i386 --exclude=*i386.rpm --exclude=repodata rsync://rsync.mirrors.ustc.edu.cn/centos/7/ /cache1/7
for i in /cache1/7/extras/x86_64 /cache1/7/os/x86_64 /cache1/7/updates/x86_64 ; 
do 
/bin/rm $i/repodata -rf && /usr/bin/createrepo -s sha --workers 8 $i ;
done
/usr/bin/rsync -avzL --exclude=i386 --exclude=ppc64 --exclude=ppc64le --exclude=repodata --exclude=repoview --exclude=SRPMS rsync://rsync.mirrors.ustc.edu.cn/epel/7 /cache1/epel/
for i in /cache1/epel/7/x86_64 ; 
do 
/bin/rm $i/repodata -rf && /usr/bin/createrepo --worker 8 $i ;
done

3. 添加排程，定时去爬数据(flock是防止旧的排程没有结束，而新的排程有开始运行)

01 02 * * * flock -xn /tmp/mytest.lock -c '/bin/bash /CentOS/sysyum.sh 2>&1 >> /dev/null'

6. 创建内网机器获取内网YUM源的脚本yum.sh

#!/bin/bash
[ -f /etc/init.d/functions ] && . /etc/init.d/functions
# Configure yum Packgae Manager
ARCH=`/usr/bin/getconf LONG_BIT`
REPOD="/etc/yum.repos.d"
#判断5和6系统的版本命令
OSVER=`/bin/awk -F "[ .]" '{print $3}' /etc/redhat-release`
#判断7系统的版本命令
OSVER7=`/bin/awk -F "[ .]" '{print $4}' /etc/redhat-release`
#创建yum源备份文件，移动所有repo文件到备份目录
if [ "$(ls -A $REPOD)" ] ; then
    [ -d ${REPOD}/repos.old ] || /bin/mkdir ${REPOD}/repos.old
    /bin/mv ${REPOD}/*.repo ${REPOD}/repos.old/ -f
fi
#判断系统版本，并生成新的repo文件
#判断是否为CentOS5版本
if [ ${ARCH}x == 64x -a ${OSVER}x == 5x ] ; then
    /bin/cat >>${REPOD}/CentOS-Base.repo <<EOF
[base]
name=CentOS-\$releasever - Base
baseurl=http://ip:port/5/os/x86_64
gpgcheck=0 
[updates]
name=CentOS-\$releasever - Updates
baseurl=http://ip:port/5/updates/x86_64
gpgcheck=0
[extras]
name=CentOS-\$releasever - Extras
baseurl=http://ip:port/5/extras/x86_64
gpgcheck=0
[epel]
name=CentOS-\$releaserver - Epel
baseurl=http://ip:port/epel/5/x86_64
gpgcheck=0
EOF
#判断是否为CentOS6版本
elif [ ${ARCH}x == 64x -a ${OSVER}x == 6x ] ; then
    /bin/cat >>${REPOD}/CentOS-Base.repo <<EOF
[base]
name=CentOS-\$releasever - Base
baseurl=http://ip:port/6/os/x86_64
gpgcheck=0
[updates]
name=CentOS-\$releasever - Updates
baseurl=http://ip:port/6/updates/x86_64
gpgcheck=0
[extras]
name=CentOS-\$releasever - Extras
baseurl=http://ip:port/6/extras/x86_64
gpgcheck=0
[epel]
name=CentOS-\$releaserver - Epel
baseurl=http://ip:port/epel/6/x86_64
gpgcheck=0
EOF
#判断是否为CentOS7版本
elif [ ${ARCH}x == 64x -a ${OSVER7}x == 7x ] ; then
    /bin/cat >>${REPOD}/CentOS-Base.repo <<EOF
[base]
name=CentOS-\$releasever - Base
baseurl=http://ip:port/7/os/x86_64
gpgcheck=0
[updates]
name=CentOS-\$releasever - Updates
baseurl=http://ip:port/7/updates/x86_64
gpgcheck=0
[extras]
name=CentOS-\$releasever - Extras
baseurl=http://ip:port/7/extras/x86_64
gpgcheck=0
[epel]
name=CentOS-\$releaserver - Epel
baseurl=http://ip:port/epel/7/x86_64
gpgcheck=0
EOF
else
    echo "only support CentOS [5/6/7].x86_64"
    exit 1
fi

5. 配置nginx(即第4步中url的ip和port)

server {
 listen port;
 server_name localhost;
 index index.html index.htm;
 #yum.sh脚本目录，可自行替换,
 root /CentOS;
 autoindex on;
 access_log logs/yum.access.log access;
 }

6. 使用内网YUM源
   一切准备就绪后，我们内网机器就可以通过下面命令去安装内网YUM并使用。

$ wget -O - http://ip:port/yum.sh | sh

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