看到这个都是情非得已的，话不多说，直接卷

搭建本地yum源

本地yum源，就意味着只有搭建该yum源的这台服务器能使用，其它的服务器都不能使用该yum源。搭建本地yum源的所有步骤如下：

#准备好一个centos 的镜像，我这里是CentOS-7-x86_64-DVD-1810.iso


# 在/local-yum目录创建挂载镜像的文件夹


# 将iso镜像挂载到/mnt/iso目录
mount -o loop CentOS-7-x86_64-DVD-1810.iso /local-yum


# 挂载成功后可以使用df -h命令查看
[root@localhost application]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   50G  1.9G   49G   4% /
devtmpfs                  63G     0   63G   0% /dev
tmpfs                     63G     0   63G   0% /dev/shm
tmpfs                     63G   11M   63G   1% /run
tmpfs                     63G     0   63G   0% /sys/fs/cgroup
/dev/sda2               1014M  138M  877M  14% /boot
/dev/sda1                200M   12M  189M   6% /boot/efi
/dev/mapper/centos-home  392G  9.0G  383G   3% /home
tmpfs                     13G     0   13G   0% /run/user/0
/dev/loop0               4.5G  4.5G     0 100% /local-yum




# 修改yum配置文件，把原先的配置先备份了
cd /etc/yum.repos.d
mkdir bak
mv *.repo ./bak

#新建local.repo
vim /etc/yum.repos.d/local.repo

[base]
name=CentOS
baseurl=file:///local-yum
enabled=1
gpgcheck=0



#清除下yum 原有的信息，载入新的缓存
yum clean all
yum makecache

这样，一个崭新的本地yum源就可以使用了。

搭建局域网yum源

除了可以搭建本地yum源外，我们还可以基于HTTP方式配置yum源，这样我们就可以配置一个局域网内都可以使用的yum源。

一般都是通过apache 来搭建HTTP的yum源，本次我们使用Nginx搭建

#官网下载nginx1.18.0
wget http://nginx.org/download/nginx-1.18.0.tar.gz

#安装依赖包，NGINX是C语言写的，pcre-devel支持正则表达式，openssl 开启加密
[root@proxy ~]# yum -y install gcc pcre-devel openssl-devel   


#创建NGINX用户，为了安全起见，不允许登录系统
[root@proxy ~]# useradd -s /sbin/nologin nginx  


#解压，安装，这里把nginx 部署在/home/application/nginx 目录下
[root@proxy ~]# mkdir /home/application/nginx 

[root@proxy ~]# tar  -xf   nginx-1.18.0.tar.gz
[root@proxy ~]# cd  nginx-1.18.0
[root@proxy nginx-1.18.0]# ./configure --prefix=/home/application/nginx --user=nginx --group=nginx --with-http_ssl_module

#编译安装
[root@proxy nginx-1.10.3]# make && make install


#创建yum仓库文件路径 /home/application/nginx-yum
[root@proxy ~]#mkdir -p /home/application/nginx-yum 

#编辑nginx 配置文件,定义端口为8899
[root@proxy ~]# vim /home/application/nginx/conf/nginx.conf

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    keepalive_timeout  65;
    server {
        listen       8899;
        server_name  localhost;
        location / {
            autoindex  on;
            root   /home/application/nginx-yum/;
        }
    }
}


#检查nginx 配置文件是否正确
[root@proxy ~]# /home/application/nginx/sbin/nginx -t
nginx: the configuration file /home/application/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /home/application/nginx/conf/nginx.conf test is successful

#将iso镜像文件挂载到临时目录下，再拷贝到yum仓库路径下 /home/application/nginx-yum
[root@proxy ~]# mkdir local-yum
[root@proxy ~]# mount -o loop CentOS-7-x86_64-DVD-1810.iso /local-yum
[root@proxy ~]# cd local-yum
[root@proxy ~]# cp -rp *  /home/application/nginx-yum/
[root@proxy ~]# ls -l /home/application/nginx-yum/
total 4669768
-rw-r--r--. 1 root root 4781506560 Aug 17 18:36 CentOS-7-x86_64-DVD-2003.iso
-rw-rw-r--. 1 root root         14 Apr 21  2020 CentOS_BuildTag
drwxr-xr-x. 3 root root         35 Apr 21  2020 EFI
-rw-rw-r--. 1 root root        227 Aug 30  2017 EULA
-rw-rw-r--. 1 root root      18009 Dec 10  2015 GPL
drwxr-xr-x. 3 root root         57 Apr 21  2020 images
drwxr-xr-x. 2 root root        198 Apr 21  2020 isolinux
drwxr-xr-x. 2 root root         43 Apr 21  2020 LiveOS
drwxr-xr-x. 2 root root     225280 Apr 22  2020 Packages
drwxrwxr-x. 2 root root       4096 Apr 22  2020 repodata
-rw-rw-r--. 1 root root       1690 Dec 10  2015 RPM-GPG-KEY-CentOS-7
-rw-rw-r--. 1 root root       1690 Dec 10  2015 RPM-GPG-KEY-CentOS-Testing-7
-r--r--r--. 1 root root       2883 Apr 22  2020 TRANS.TBL



#确认配置没有问题后，启动nginx
[root@proxy ~]# /home/application/nginx/sbin/nginx


#查看端口
[root@localhost conf]# netstat -ntlup 
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      16129/sshd               
tcp        0      0 0.0.0.0:8899            0.0.0.0:*               LISTEN      41103/nginx: master 
tcp6       0      0 :::22                   :::*                    LISTEN      16129/sshd          

#登陆浏览器访问查看yum仓库

#最后，我们开始配置yum的配置文件，在/etc/yum.repos.d新建一个名为nginx-yum.repo 的配置文件，内容如下：

vim /etc/yum.repos.d/nginx-yum.repo
[Nginx-yum]
name=nginx-yum
baseurl=http://10.114.0.15:8899
enabled=1
gpgcheck=0

#清除下yum 原有的信息，载入新的缓存

yum clean all
yum makecache

这样，局域网yum源就可以使用了

#安装一个软件试下效果

[root@localhost ~]# yum install bash*
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Package bash-4.2.46-34.el7.x86_64 already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package bash-completion.noarch 1:2.1-6.el7 will be updated
---> Package bash-completion.noarch 1:2.1-8.el7 will be an update
--> Finished Dependency Resolution

Dependencies Resolved

===================================================================================================================================================================================================================================================================
 Package                                                            Arch                                                      Version                                                           Repository                                                    Size
===================================================================================================================================================================================================================================================================
Updating:
 bash-completion                                                    noarch                                                    1:2.1-8.el7                                                       Nginx-yum                                                     87 k

Transaction Summary
===================================================================================================================================================================================================================================================================
Upgrade  1 Package

Total download size: 87 k
Is this ok [y/d/N]: y
Downloading packages:
No Presto metadata available for Nginx-yum
bash-completion-2.1-8.el7.noarch.rpm                                                                                                                                                                                                        |  87 kB  00:00:00     
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
  Updating   : 1:bash-completion-2.1-8.el7.noarch                                                                                                                                                                                                              1/2 
  Cleanup    : 1:bash-completion-2.1-6.el7.noarch                                                                                                                                                                                                              2/2 
  Verifying  : 1:bash-completion-2.1-8.el7.noarch                                                                                                                                                                                                              1/2 
  Verifying  : 1:bash-completion-2.1-6.el7.noarch                                                                                                                                                                                                              2/2 

Updated:
  bash-completion.noarch 1:2.1-8.el7                                                                                                                                                                                                                        
Complete!