看到這個都是情非得已的，話不多說，直接卷

搭建本地yum源

本地yum源，就意味著只有搭建該yum源的這台伺服器能使用，其它的伺服器都不能使用該yum源。搭建本地yum源的所有步驟如下：

#準備好一個centos 的鏡像，我這裡是CentOS-7-x86_64-DVD-1810.iso


# 在/local-yum目錄創建掛載鏡像的文件夾


# 將iso鏡像掛載到/mnt/iso目錄
mount -o loop CentOS-7-x86_64-DVD-1810.iso /local-yum


# 掛載成功後可以使用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，把原先的配置先備份了
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，載入新的緩存
yum clean all
yum makecache

這樣，一個嶄新的本地yum源就可以使用了。

搭建區域網yum源

除了可以搭建本地yum源外，我們還可以基於HTTP方式配置yum源，這樣我們就可以配置一個區域網內都可以使用的yum源。

一般都是通過apache 來搭建HTTP的yum源，本次我們使用Nginx搭建

#官網下載nginx1.18.0
wget http://nginx.org/download/nginx-1.18.0.tar.gz

#安裝依賴包，NGINX是C語言寫的，pcre-devel支持正則表達式，openssl 開啟加密
[root@proxy ~]# yum -y install gcc pcre-devel openssl-devel   


#創建NGINX用戶，為了安全起見，不允許登錄系統
[root@proxy ~]# useradd -s /sbin/nologin nginx  


#解壓，安裝，這裡把nginx 部署在/home/application/nginx 目錄下
[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

#編譯安裝
[root@proxy nginx-1.10.3]# make && make install


#創建yum倉庫文件路徑 /home/application/nginx-yum
[root@proxy ~]#mkdir -p /home/application/nginx-yum 

#編輯nginx 配置文件,定義埠為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/;
        }
    }
}


#檢查nginx 配置文件是否正確
[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

#將iso鏡像文件掛載到臨時目錄下，再拷貝到yum倉庫路徑下 /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



#確認配置沒有問題後，啟動nginx
[root@proxy ~]# /home/application/nginx/sbin/nginx


#查看埠
[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