由于某某公司针对安全这一块做的比较严谨，服务器全部都不可以连接外网。由于开发环境只有局域网，没法使用网上的各种YUM源，来回拷贝rpm包安装麻烦，还得解决依赖问题。想着在CentOS7.3搭建个本地/局域网YUM源，方便自己跟同事安装软件。
创建本地YUM源
环境：
[root@zhdy-01 ~]#cat /etc/centos-release
CentOS Linux release 7.3.1611 (Core)
并且是Minimal Install。
准备rpm包：
挂载CentOS-7-x86_64-Everything-1611.iso，把里面所有文件都拷贝到本地目录/yum/yum-iso
[root@zhdy-01 ~]#mkdir /mnt/yum-iso
[root@zhdy-01 ~]#mount /dev/cdrom /mnt/yum-iso/
mount: /dev/sr0 is write-protected,mounting read-only
[root@zhdy-01 ~]#mkdir /yum/
[root@zhdy-01 ~]#cp -a /mnt/yum-iso/ /yum/
[root@zhdy-01 ~]#ll /yum/
total 4
dr-xr-xr-x. 8 root root 4096 Dec 10 2015 yum-iso
[root@zhdy-01 ~]#ll /yum/yum-iso/
total 640
-r�Cr�Cr�C. 1 root root 14 Dec 10 2015 CentOS_BuildTag
dr-xr-xr-x. 3 root root 33 Dec 10 2015 EFI
-r�Cr�Cr�C. 1 root root 215 Dec 10 2015 EULA
-r�Cr�Cr�C. 1 root root 18009 Dec 10 2015 GPL
dr-xr-xr-x. 3 root root 69 Dec 10 2015 images
dr-xr-xr-x. 2 root root 4096 Dec 10 2015 isolinux
dr-xr-xr-x. 2 root root 41 Dec 10 2015 LiveOS
dr-xr-xr-x. 2 root root 483328 Dec 10 2015 Packages
dr-xr-xr-x. 2 root root 4096 Dec 10 2015 repodata
-r�Cr�Cr�C. 1 root root 1690 Dec 10 2015 RPM-GPG-KEY-CentOS-7
-r�Cr�Cr�C. 1 root root 1690 Dec 10 2015 RPM-GPG-KEY-CentOS-Testing-7
-r�Cr�Cr�C. 1 root root 2883 Dec 10 2015 TRANS.TBL
备份、移除其他repo
[root@zhdy-01 ~]#cd /etc/yum.repos.d/
[root@zhdy-01 yum.repos.d]#ll
-rw-r�Cr�C. 1 root root 1664 Dec 9 2015 CentOS-Base.repo
-rw-r�Cr�C. 1 root root 1309 Dec 9 2015 CentOS-CR.repo
-rw-r�Cr�C. 1 root root 649 Dec 9 2015 CentOS-Debuginfo.repo
-rw-r�Cr�C. 1 root root 290 Dec 9 2015 CentOS-fasttrack.repo
-rw-r�Cr�C. 1 root root 630 Dec 9 2015 CentOS-Media.repo
-rw-r�Cr�C. 1 root root 1331 Dec 9 2015 CentOS-Sources.repo
-rw-r�Cr�C. 1 root root 1952 Dec 9 2015 CentOS-Vault.repo
[root@zhdy-01 yum.repos.d]#tar zcvf repo-bk.tar.gz CentOS-*
CentOS-Base.repo
CentOS-CR.repo
CentOS-Debuginfo.repo
CentOS-fasttrack.repo
CentOS-Media.repo
CentOS-Sources.repo
CentOS-Vault.repo
[root@zhdy-01 yum.repos.d]#rm -f CentOS-Base.repoCentOS-CR.repoCentOS-Debuginfo.repoCentOS-fasttrack.repoCentOS-Sources.repoCentOS-Vault.repo
配置本地repo
[root@zhdy-01 yum.repos.d]#vi CentOS-Media.repo
填入如下内容：
[c7-media]
name=CentOS-$releasever-Mediabaseurl=file:///yum/yum-iso/gpgcheck=0enabled=1gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
注释：配置repo路径、关闭gbp校验、启用这个repo
制作cache
[root@zhdy-01 yum.repos.d]#yum clean all
Loaded plugins: fastestmirror
Cleaning repos: c7-media
Cleaning up everything
Cleaning up list of fastest mirrors
[root@zhdy-01 yum.repos.d]#yum makecache
c7-media | 3.6 kB 00:00:00
(1/4): c7-media/group_gz | 155 kB 00:00:00
(2/4): c7-media/primary_db | 5.3 MB 00:00:00
(3/4): c7-media/filelists_db | 6.2 MB 00:00:00
(4/4): c7-media/other_db | 2.3 MB 00:00:00
Determining fastest mirrors
Metadata Cache Created
这样就可以使用yum安装软件了
[root@zhdy-01 yum.repos.d]#yum groupinstall “Development tools”
There is no installed groups file.
Maybe run: yum groups mark convert (see man yum)
Loading mirror speeds from cached hostfile
Resolving Dependencies
�C> Running transaction check
―> Package autoconf.noarch 0:2.69-11.el7 will be installed
�C> Processing Dependency: perl >= 5.006 for package: autoconf-2.69-11.el7.noarch
�C> Processing Dependency: m4 >= 1.4.14 for package: autoconf-2.69-11.el7.noarch
�C> Processing Dependency: perl(warnings) for package: autoconf-2.69-11.el7.noarch
或者
[root@zhdy-01 yum.repos.d]#yum install tree
―> Package tree.x86_64 0:1.6.0-10.el7 will be installed
�C> Finished Dependency Resolution
自定义YUM源
[root@zhdy-01 yum.repos.d]#yum -y install createrepo
准备rpm包
（需要自己确定依赖包）、目录。这里使用tree做演示。
[root@zhdy-01 ~]#mkdir -p /yum/yum-custom/packages
创建repo
[root@zhdy-01 ~]#createrepo -u -d /yum/yum-custom/
Spawning worker 0 with 1 pkgs
Spawning worker 1 with 0 pkgs
Workers Finished
Saving Primary Metadata
Saving file lists Metadata
Saving other Metadata
Generating sqlite DBs
sqlite DBs complete
[root@zhdy-01 ~]#ll /yum/yum-custom/
drwxr-xr-x. 2 root root 41 Dec 20 07:03 packages
drwxr-xr-x. 2 root root 4096 Dec 20 07:08 repodata
配置自定义repo
[root@zhdy-01 ~]#vi /etc/yum.repos.d/CentOS-Media.repo
[c7-media]
name=CentOS-$releasever-Media
baseurl=file:///yum/yum-custom/
gpgcheck=0
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
制作cache：
[root@zhdy-01 ~]#yum clean all
[root@zhdy-01 ~]#yum makecache
c7-media | 3.0 kB 00:00:00
(1/3): c7-media/filelists_db | 880 B 00:00:00
(2/3): c7-media/primary_db | 1.8 kB 00:00:00
(3/3): c7-media/other_db | 1.3 kB 00:00:00
使用自定义repo：
[root@zhdy-01 ~]#yum install tree
制作局域网YUM源
局域网YUM源可以配成：本地YUM源+FTP服务器
这里使用自定义源yum-custom（上文所提到的目录） + VSFTP演示。
下载vsftpd：
[root@zhdy-01 ~]#yum -y install vsftpd
配置vsftpd：
编辑vsftp.conf
[root@zhdy-01 ~]#vi /etc/vsftpd/vsftpd.conf
anon_root=/yum/
注意目录权限如下
[root@zhdy-01 ~]#ll -a /yum/
total 8
drwxr-xr-x. 4 root root 37 Dec 20 07:37 .
dr-xr-xr-x. 18 root root 4096 Dec 20 06:32 ..
drwxr-xr-x. 4 root root 36 Dec 20 07:08 yum-custom
关闭selinux
临时
[root@zhdy-01 ~]#setenforce 0
或者，永久：
编辑config
[root@zhdy-01 ~]#vi /etc/selinux/config
设置
SELINUX=disabled
重启
[root@zhdy-01 ~]#reboot
启用vsftp：
[root@zhdy-01 ~]#systemctl start vsftpd
[root@zhdy-01 ~]#systemctl enable vsftpd
Created symlink from /etc/systemd/system/multi-user.target.wants/vsftpd.service to /usr/lib/systemd/system/vsftpd.service.
局域网使用：
局域网另外一台机器zhdy-02，
配置repo：
[root@zhdy-02 ~]#vim /etc/yum.repos.d/CentOS-Media.repo
内容如下：
[c7-media]
name=CentOS-$releasever-Media
baseurl=ftp://192.168.96.129/yum-custom
gpgcheck=0
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
其中192.168.96.129为上面vsftp服务器地址
启用这个局域网的repo：
[root@zhdy-02 ~]#yum clean all
[root@zhdy-02 ~]#yum makecache
c7-media | 3.0 kB 00:00
(1/3): c7-media/filelists_db | 880 B 00:00
(2/3): c7-media/other_db | 1.3 kB 00:00
(3/3): c7-media/primary_db | 1.8 kB 00:00
测试~
[root@zhdy-02 ~]# yum -y install tree
�C> Finished Dependency Resolution
