无论6跟7都要先准备两个文件，一个CentOS-Base.repo，另一个是epel.repo。
首先，制作私有仓库的目的就是为那些在内网的机器提供标准版本的yum源，所以我们可以先找一台可以访问外网的机器，将仓库制作下来，之后导入到内网机器，并设置从指定目录yum的repo即可使用。
一、centos7准备两个文件：
1.base文件
[root@localhost 7_repo]# cat CentOS-Base.repo
# 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/$basearch/
http://mirrors.cloud.aliyuncs.com/centos/$releasever/os/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/
http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/
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
[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/$basearch/
http://mirrors.cloud.aliyuncs.com/centos/$releasever/extras/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/
http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/
http://mirrors.cloud.aliyuncs.com/centos/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#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/$basearch/
http://mirrors.cloud.aliyuncs.com/centos/$releasever/contrib/$basearch/
gpgcheck=1
enabled=0
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
2.epel文件
[root@localhost 7_repo]# cat epel.repo
[epel]
name=Extra Packages for Enterprise Linux 7 - $basearch
baseurl=http://mirrors.aliyun.com/epel/7/$basearch
failovermethod=priority
enabled=1
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
[epel-debuginfo]
name=Extra Packages for Enterprise Linux 7 - $basearch - Debug
baseurl=http://mirrors.aliyun.com/epel/7/$basearch/debug
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=0
[epel-source]
name=Extra Packages for Enterprise Linux 7 - $basearch - Source
baseurl=http://mirrors.aliyun.com/epel/7/SRPMS
failovermethod=priority
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
gpgcheck=0
yum clean all
yum makecache
之后创建一个目录，或者直接拿家目录搞，比如/root
cd /yum
执行以下四个命令：
[root@xxx ~]# reposync -r base #reposync将根据刚下载的repo下载rpm包到指定文件夹
[root@xxx ~]# reposync -r extras
[root@xxx ~]# reposync -r updates
[root@xxx ~]# reposync -r epel
包很多，要等待很久下载完成，可以放在后台上跑。命令如下：
nohup reposync --repoid=BaseOS --repoid=extras >output 2>&1 &
[root@xxx ~]# cd /root/base
[root@xxx ~]# createrepo ./
[root@xxx ~]# cd /root/extras
[root@xxx ~]# createrepo ./
[root@xxx ~]# cd /root/updates
[root@xxx ~]# createrepo ./
[root@xxx ~]# cd /root/epel
[root@xxx ~]# createrepo ./
到此就i完成了，7版本现在大概50G，可以将整个root目录拷贝到移动硬盘上，再导入到内网机器
并设置base.repo，如下：
[root@localhost 7_repo]# cat base.repo [base] name=CentOS-Base baseurl=file:///root/base path=/ enabled=1 gpgcheck=0 [updates] name=CentOS-Updates baseurl=file:///root/updates path=/ enabled=1 gpgcheck=0 [extras] name=CentOS-Extras baseurl=file:///root/extras path=/ enabled=1 gpgcheck=0 [epel] name=CentOS-Epel baseurl=file:///root/epel path=/ enabled=1 gpgcheck=0
之后内网机器即可使用Yum安装rpm包
二、centos6还是准备两个文件，6版本现在跟7的网址已经不同，已经不维护了，所以准备的文件需要修改。如下：
1.centos-base.repo [root@localhost yum.repos.d]# cat CentOS-Base.repo # CentOS-Base.repo # # The mirror system uses the connecting IP address of the client and the # update status of each mirror to pick mirrors that are updated to and # geographically close to the client. You should use this for CentOS updates # unless you are manually picking other mirrors. # # If the mirrorlist= does not work for you, as a fall back you can try the # remarked out baseurl= line instead. # # [base] name=CentOS-$releasever - Base - mirrors.aliyun.com failovermethod=priority baseurl=https://vault.centos.org/6.10/os/x86_64/ gpgcheck=1 gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-6 #released updates [updates] name=CentOS-$releasever - Updates - mirrors.aliyun.com failovermethod=priority baseurl=https://vault.centos.org/6.10/updates/x86_64/ gpgcheck=1 gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-6 #additional packages that may be useful [extras] name=CentOS-$releasever - Extras - mirrors.aliyun.com failovermethod=priority baseurl=https://vault.centos.org/6.10/extras/x86_64/ gpgcheck=1 gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-6 #additional packages that extend functionality of existing packages [centosplus] name=CentOS-$releasever - Plus - mirrors.aliyun.com failovermethod=priority baseurl=https://vault.centos.org/6.10/centosplus/x86_64/ gpgcheck=1 enabled=0 gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-6 #contrib - packages by Centos Users [contrib] name=CentOS-$releasever - Contrib - mirrors.aliyun.com failovermethod=priority baseurl=https://vault.centos.org/6.10/contrib/x86_64/ gpgcheck=1 enabled=0 gpgkey=https://vault.centos.org/RPM-GPG-KEY-CentOS-6 2.epel.repo（找了很久，记住这个地址） [root@localhost yum.repos.d]# cat epel.repo [epel] name=Extra Packages for Enterprise Linux 6 - $basearch baseurl=http://archives.fedoraproject.org/pub/archive//epel/6/$basearch failovermethod=priority enabled=1 gpgcheck=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 [epel-debuginfo] name=Extra Packages for Enterprise Linux 6 - $basearch - Debug baseurl=http://archives.fedoraproject.org/pub/archive//epel/6/$basearch/debug failovermethod=priority enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 gpgcheck=0 [epel-source] name=Extra Packages for Enterprise Linux 6 - $basearch - Source baseurl=http://archives.fedoraproject.org/pub/archive//epel/6/SRPMS failovermethod=priority enabled=0 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 gpgcheck=0
OK，准备完毕。
yum clean all
yum makecache
之后执行reposync等等操作，参考上面centos7的操作即可。制作完毕后，还是放到移动硬盘里，作为内网机器安装centos6版本rpm的仓库，随用随插，直接搞~！
三、centos8编写文件
[root@localhost 8_repo]# cat CentOS-AppStream.repo [AppStream] name=CentOS-8-AppStream baseurl=http://mirrors.aliyun.com/centos/8-stream/AppStream/x86_64/os/ gpgcheck=1 enabled=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official [root@localhost 8_repo]# cat CentOS-Base.repo [BaseOS] name=CentOS-8-Base baseurl=http://mirrors.aliyun.com/centos/8-stream/BaseOS/x86_64/os/ gpgcheck=1 enabled=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official [root@localhost 8_repo]# cat CentOS-Extras.repo [extras] name=CentOS-8-Extras baseurl=http://mirrors.aliyun.com/centos/8-stream/extras/x86_64/os/ gpgcheck=1 enabled=1 gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official
yum clean all
yum makecache
reposync --repoid=AppStream --repoid=BaseOS --repoid=extras
createrepo -p AppStream/
createrepo -p BaseOS
createrepo -p extras
