https://blog.51cto.com/life2death/1708417

3.搭建yum仓库，准备需要的软件
mlocate lrzsz tree vim nc nmap lrzsz wget bash-completion bash-completion-extras cowsay sl htop iotop iftop lsof net-tools sysstat unzip bc psmisc ntpdate wc telnet-server bind-utils createrepo

gcc gcc-c++ autoconf pcre pcre-devel make automake httpd-tools
还有架构中要用到的软件与依赖环境也要下载放到仓库中

服务端—m01管理机

提前下载好nginx

yum install nginx -y

把rpm包及其相关依赖全部都下载到本地，保存好。
手动在/etc/yum.repos.d/目录下配置本地仓库信息。
使用createrepo命令生成repodata信息。
使用yum repoinfo检查确认。

yum仓库本地存放rpm包的路径：/yum/

创建一个本地仓库的目录
mkdir /yum/

yum install  --downloadonly --downloaddir=/yum/ mlocate lrzsz tree vim nc nmap lrzsz wget bash-completion bash-completion-extras cowsay sl htop iotop iftop lsof net-tools sysstat unzip bc psmisc ntpdate wc telnet-server bind-utils gcc gcc-c++ autoconf pcre pcre-devel make automake httpd-tools 

只下载不安装的命令:

--downloadonly 只下载不安装
--downloaddir 指定rpm包的下载路径

1.修改yum配置文件，打开本地缓存，1为开启，0为不开启

这里要把keepcache打开
从外网下载的rpm包可以到缓存目录/var/cache/yum/下查找，可以将本地缓存下面需要的包都移动到yum仓库中。

[root@m01 /etc/yum.repos.d]# cat /etc/yum.conf 
[main]
cachedir=/var/cache/yum/$basearch/$releasever
keepcache=1
debuglevel=2
logfile=/var/log/yum.log
exactarch=1
obsoletes=1
gpgcheck=1
plugins=1
installonly_limit=5
...

2.安装createrepo

#创建一个本地仓库的目录
mkdir /yum/

#安装
yum install createrepo -y

#生成索引文件
createrepo /yum/

3.每次下载了新的rpm包需要执行此命令

createrepo --update /yum/

--update 如果元数据已经存在，且软件仓库中只有部分软件发生了改变或增减，则可用update参数直接对原有元数据进行升级，效率比重新分析rpm包依赖并生成新的元数据要高很多。

4.通过http协议访问

创建一个本地源

[root@m01]# vim /etc/yum.repos.d/yum-Media.repo
[yum_ck] #本地仓库名
name=CentOS- - 仓库 #注释信息
baseurl=http://10.0.0.61:8888/  #http协议，rpm包存放路径
gpgcheck=0  #关闭安全验证
enabled=1   #启用本仓库
priority=1  #优先级为1,最高

通过http协议访问

配置.conf文件
不要与ngin.conf文件冲突

vim /etc/nginx/conf.d/yum_ck.conf

server {
    listen 8888;
    server_name 10.0.0.61;
    root /yum;
    index index.html;
    location / {
      root /yum;
      autoindex on;
    }
}

重启nginx

nginx -t

systemctl start nginx

5.清除yum缓存

yum clean all

6.下载一款软件放到/yum/下测试

yum install  --downloadonly --downloaddir=/yum nfs-utils

# 执行此命令检查是否是从本地源找的包
yum provides nfs-utils

#显示结果为本地仓库名代表成功
Repo        : @yum_ck

7.优先级设置

1.下载第三方插件

yum install yum-plugin-priorities.noarch

2.检查是否启动服务（默认是开启的）

cat /etc/yum/pluginconf.d/priorities.conf
[main]
enabled = 1

3.修改源的优先级(新建的本地源在创建时已添加优先级为1）
vim /etc/yum.repos.d/CentOS-Base.repo
代码中已注释“#添加优先级为2”

[root@m01 /etc/yum.repos.d]# vim CentOS-Base.repo
[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/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
priority=2  #添加优先级为2
#released updates 
[updates]
name=CentOS-$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
priority=2  #添加优先级为2
#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/$basearch/
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
priority=2  #添加优先级为2
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$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
priority=2  #添加优先级为2
#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
priority=2  #添加优先级为2

8.对本地仓库进行更新

下载一个新的rpm软件包到本地仓库，此时我们使用’yum repoinfo yum_ck ‘查看会发现软件包的数量并没有增加，我们安装新增的软件包也会提示，找不到此软件包的现象，可以按照下述步骤，更新仓库信息。

yum_ck === 本地仓库的名称


查看旧的软件包总数 yum repoinfo yum_ck | grep pkgs
更新本地仓库 createrepo --update /yum/
清除所有缓存 yum clean all
查看新的软件包总数 yum repoinfo yum_ck | grep pkgs
如果软件包的数量增加，说明仓库更新成功。

9.将配置推送到所有的客户端

yum -y install yum-plugin-priorities.noarch

/etc/yum.repos/yum-Media.repo

/etc/yum.repos.d/CentOS-Base.repo

用ansible剧本实现,在本地配置好

这里的/etc/ansible/file路径是根据自己的环境创建的，只是为了推送这个本地源的配置文件，推送到客户端的路径不要写错就好。

[root@m01 /etc/ansible]# cat /etc/ansible/yum_ck.yml 
#本地yum仓库搭建
---
  - hosts: all
    tasks:

    - name: cp yum-Media.repo
      copy: 
        src: /etc/ansible/file/yum-Media.repo
        dest: /etc/yum.repos.d/
        force: yes

    - name: copy .repo
      copy:
        src: /etc/ansible/file/CentOS-Base.repo
        dest: /etc/yum.repos.d/CentOS-Base.repo
        force: yes

    - name: yum-plugin-priorities.noarch
      yum:
        name: yum-plugin-priorities.noarch
        state: present