构建ubuntu12.十、centos6本地更新源

    在公司内部使用国内的16三、sohu等源的时候，发如今安装软件较多的时候，仍是有点慢，目前公司内部的openstack平台上面跑了60多台vm实例，按照趋势还有增多的可能，确实须要搭建一套本地源。

    不少搭建本地源的案例都是把发行DVD中的rpm、deb包拷贝到本地，而后经过http协议进行访问，DVD中的包都是没有更新过的，而openstack项目更新仍是比较快的，尤为是ubuntu常常更新东西仍是不少的，因此决定把国内的某个源拉一套到本地，而后天天定时同步更新。

1 搭建ubuntu 12.10源

  在debian/ubuntu下有个神器叫apt-mirror，该工具可让你镜像一部分或者所有发行版的apt sources到本地，apt-mirror具备如下特性：

        * It uses a config similar to apts sources.list

        * It's fully pool comply

        * It supports multithreaded downloading

        * It supports multiple architectures at the same time

        * It can automatically remove unneeded files

        * It works well on overloaded channel to internet

        * It never produces an inconsistent mirror including while mirroring

        * It works on all POSIX compliant systems with perl and wget

  如今让咱们把sohu的ubuntu 12.10的源mirror到本地，先安装apt-mirror工具：

apt-get install apt-mirror

   /etc/cron.d/apt-mirror  设置天天何时同步更新内容

   /etc/apt/mirror.list  mirror相关信息的配置

   因为源的内容比较多，并且比较重要，全部同步下来的源内容咱们不放在本地磁盘，而是在共享存储上划出一块空间，挂载在宿主机上，这样在宿主机宕机或者硬盘故障的时候，可使共享存储的内容在其余宿主机上继续发挥做用，本编中挂载在/opt/apt-source目录下。

mirror.list配置以下：

set base_path    /opt/apt-source
set mirror_path  $base_path/mirror
set skel_path    $base_path/skel
set var_path     $base_path/var
set cleanscript $var_path/clean.sh
set defaultarch  <running host architecture>
set postmirror_script $var_path/postmirror.sh
set run_postmirror 0
set nthreads     40
set _tilde 0

deb-amd64 http://mirrors.sohu.com/ubuntu/  quantal  main restricted universe multiverse
deb-amd64 http://mirrors.sohu.com/ubuntu/  quantal-backports  main restricted universe multiverse
deb-amd64 http://mirrors.sohu.com/ubuntu/  quantal-proposed  main restricted universe multiverse
deb-amd64 http://mirrors.sohu.com/ubuntu/  quantal-security  main restricted universe multiverse
deb-amd64 http://mirrors.sohu.com/ubuntu/  quantal-updates  main restricted universe multiverse

deb-i386 http://mirrors.sohu.com/ubuntu/  quantal  main restricted universe multiverse
deb-i386 http://mirrors.sohu.com/ubuntu/  quantal-backports  main restricted universe multiverse
deb-i386 http://mirrors.sohu.com/ubuntu/  quantal-proposed  main restricted universe multiverse
deb-i386 http://mirrors.sohu.com/ubuntu/  quantal-security  main restricted universe multiverse
deb-i386 http://mirrors.sohu.com/ubuntu/  quantal-updates  main restricted universe multiverse

  开始在后台同步sohu的源：

nohup apt-mirror -c /etc/apt/mirror.list &

  同步完毕后，搭建web服务

apt-get install apache2
cd /var/www
ln -s /opt/apt-source/mirror/mirrors.sohu.com/ubuntu ubuntu

  把/etc/apt/sources.list文件的内容替换成以下(10.1.6.6)：

deb http://10.1.6.6/ubuntu quantal main  multiverse restricted  universe
deb http://10.1.6.6/ubuntu quantal-backports main  multiverse restricted  universe
deb http://10.1.6.6/ubuntu quantal-proposed main  multiverse restricted  universe
deb http://10.1.6.6/ubuntu quantal-updates main  multiverse restricted  universe
deb http://10.1.6.6/ubuntu quantal-security main  multiverse restricted  universe

    若是在设置mirror.list时，源设置的是'deb http://'，则默认是同步64位的包，可是有些包安装时须要32位的支持，因此还须要同步32位的源，就如上面配置文件设置。

  更新apt数据库信息

apt-get update

2 搭建centos6源

    在搞定完ubuntu以后，想按照上面的思路把centos也搞定，google一番后，没发现centos下有类似的工具，只能另换方法，决定直接从官方把整个源同步下来，到mirrors.kernel.org上一看，提供了三种方式mirror sources：HTTP、FTP、RSYNC，那就用rsync把它所有同步下来吧。

经过下面脚本进行同步

#!/bin/sh
#rsync -avzL --delete -stats rsync://mirrors.kernel.org/centos/6/ /opt/apt-source/centos6/
rsync="/usr/bin/rsync -avzL --delete"
mirror=rsync://mirrors.kernel.org/centos

ver=6
arch="x86_64 i386"
base="os updates centosplus isos fasttrack extras cr contrib"
local=/opt/apt-source/centos6

for arch in $arch
do
  for base in $base
  do
    remote=$mirror/$ver/$base/$arch/
    if [ ! -e $local/$base/$arch ]; then
      mkdir -p "$local/$base/$arch"
    fi
    $rsync $remote $local/$base/$arch/
  done
done

    脚本放入后台执行便可，同步完毕后，用以下内容替换centos6的/etc/yum.repos.d/CentOS-Base.repo内容便可。

[base]
name=CentOS - Base
baseurl=http://10.1.6.6/centos/6/os/$basearch/
gpgcheck=1
gpgkey=http://10.1.6.6/centos/6/os/$basearch/RPM-GPG-KEY-CentOS-6

#released updates
[update]
name=CentOS - Updates
baseurl=http://10.1.6.6/centos/6/updates/$basearch/
gpgcheck=1
gpgkey=http://10.1.6.6/centos/6/os/$basearch/RPM-GPG-KEY-CentOS-6

#released extras
[extras]
name=CentOS - Extras
baseurl=http://10.1.6.6/centos/6/extras/$basearch/
gpgcheck=1
gpgkey=http://10.1.6.6/centos/6/os/$basearch/RPM-GPG-KEY-CentOS-6

#released CentOSPlus
[centosplus]
name=CentOS - CentOSPlus
baseurl=http://10.1.6.6/centos/6/centosplus/$basearch/
gpgcheck=1
gpgkey=http://10.1.6.6/centos/6/os/$basearch/RPM-GPG-KEY-CentOS-6

#contrib - packages by Centos Users
[contrib]
name=CentOS - Contrib
baseurl=http://10.1.6.6/centos/6/contrib/$basearch/
gpgcheck=1
gpgkey=http://10.1.6.6/centos/6/os/$basearch/RPM-GPG-KEY-CentOS-6

更新yum源缓存信息

yum clean all
yum makecache