CentOS yum源设置priority优先查找本地源安装

CentOS的yum在安装时默认是将/etc/yum.repos.d/目录下.repo后缀文件都查找，然后用找到的第一个源。

如果安装有网络的源和光盘cdrom的源，在列表中CentOS-Base.repo被先找到，这里是网络源。那么光盘就不会在被安装。

可以设置文件优先级来让yum先搜索优先级高的，我们设置CentOS-Media.repo文件高，CentOS-Base.repo次之。

安装yum-priorities 来管理优先级

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1	[root@Cent0S7 ]yum -y install yum-priorities

 文件优先级设置，priority=N # N值为1-99，数字越大,优先级越低.（如果repo文件项里不写priority那默认是99，最低。）

 注意:priority=1这个要放到repo文件的项里,和enabled一样;而不是一个repo文件里放一个priority=1,另一个文件放priority=2就是priority=1文件优先级高了.

以 163.repo和aliyun.repo文件做例子,在[base_aliyun]项下和[base_163]分别放了priority代表，当使用到base里的链接时，优先使用[base_aliyun]项下地址。

其他项也是一样，当然如果有些链接报错感觉没用，直接在项下加入 enabled=0 关闭此项即可。

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1	[root@Cent0S7 ~]# vi /etc/yum.repos.d/aliyun.repo

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[base_aliyun] 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/$basearch/         http://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7 <strong>priority=1</strong>   [updates_aliyun] name=CentOS-$releasever - Updates - mirrors.aliyun.com failovermethod=priority baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/         http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/         http://mirrors.cloud.aliyuncs.com/centos/$releasever/updates/$basearch/ gpgcheck=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7   #additional packages that may be useful

　　

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1	[root@Cent0S7 ~]# vi /etc/yum.repos.d/163.repo

 

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[base_163] name=CentOS-$releasever - Base - 163.com #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os baseurl=http://mirrors.163.com/centos/$releasever/os/$basearch/ gpgcheck=1 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7 <strong>priority=2</strong>   [updates_163] name=CentOS-$releasever - Updates - 163.com #mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo =updates baseurl=http://mirrors.163.com/centos/$releasever/updates/$basearch/ gpgcheck=1 gpgkey=http://mirrors.163.com/centos/RPM-GPG-KEY-CentOS-7

启用CentOS-Media 这个光盘源

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1	[root@Cent0S7 ~]# sed -i 's/enabled=0/enabled=1/g' /etc/yum.repos.d/CentOS-Media.repo

安装httpd来测试：

网络和光盘Iso都设置好，没有设置优先级：

可以看到 Repository里是base也就是网络的源。

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[root@Cent0S7 yum.repos.d]# yum install httpd                      Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile  * base: mirrors.aliyun.com  * c7-media:  * extras: mirrors.aliyun.com  * updates: mirrors.aliyun.com Resolving Dependencies --> Running transaction check <br>----   中间略  ----   Dependencies Resolved   =====================================================================================================================  Package                    Arch                  Version                               Repository              Size ===================================================================================================================== Installing:  httpd                      x86_64                2.4.6-97.el7.centos                   updates                2.7 M Installing for dependencies:  apr                        x86_64                1.4.8-7.el7                           base                   104 k  apr-util                   x86_64                1.5.2-6.el7                           base                    92 k  httpd-tools                x86_64                2.4.6-97.el7.centos                   updates                 93 k  mailcap                    noarch                2.1.41-2.el7                          base                    31 k   Transaction Summary ===================================================================================================================== Install  1 Package (+4 Dependent packages)   Total download size: 3.0 M Installed size: 10 M Is this ok [y/d/N]:

　　

设置优先级后：

可以看到先搜索c7-media 也就是光盘里 c7-media是repo文件里设置的name可以随意改。

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[root@Cent0S7 yum.repos.d]# yum install httpd                        Loaded plugins: fastestmirror, priorities Loading mirror speeds from cached hostfile  * base: mirrors.aliyun.com  * c7-media:  * extras: mirrors.aliyun.com  * updates: mirrors.aliyun.com 10867 packages excluded due to repository priority protections Resolving Dependencies --> Running transaction check <br>----   中间略  ----   Dependencies Resolved   =====================================================================================================================  Package                    Arch                  Version                              Repository               Size ===================================================================================================================== Installing:  httpd                      x86_64                2.4.6-93.el7.centos                  c7-media                2.7 M Installing for dependencies:  apr                        x86_64                1.4.8-5.el7                          c7-media                103 k  apr-util                   x86_64                1.5.2-6.el7                          c7-media                 92 k  httpd-tools                x86_64                2.4.6-93.el7.centos                  c7-media                 92 k  mailcap                    noarch                2.1.41-2.el7                         c7-media                 31 k   Transaction Summary ===================================================================================================================== Install  1 Package (+4 Dependent packages)   Total download size: 3.0 M Installed size: 10 M Is this ok [y/d/N]:

　查看列表

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1	[root@Cent0S7 ]# yum repolist

　统计安装包个数

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1 2	[root@Cent0S7 ]# yum list | wc -l 10498

　　

 脚本安装：

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[root@Cent0S7 ]# cat <<EOF | sudo tee  yum-localrepo.sh #! /bin/bash   mkdir -p /media/cdrom/ mount /dev/cdrom /media/cdrom/   echo "/dev/cdrom    /mnt/cdrom     iso9660     defaults    0   0" >> /etc/fstab sed -i 's/enabled=0/enabled=1/g' /etc/yum.repos.d/CentOS-Media.repo echo "priority=1" >> /etc/yum.repos.d/CentOS-Media.repo echo "priority=2" >> /etc/yum.repos.d/CentOS-Base.repo   yum -y install yum-priorities yum makecache EOF

　　

执行脚本：

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1	[root@CentOs7]# sh yum-localrepo.sh

　　

 

 

参考：

http://cnblogs.com/mountain2011/p/10224350.html

 

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