Yum 与 DNF：Linux 包管理的"父子恩仇录"
在 Linux 的世界里，安装软件就像点外卖------你只需要动动嘴（敲敲命令），剩下的让包管理器去操心。今天我们要聊的，就是 Red Hat 系的两代"外卖小哥"：Yum 和 DNF。
一、先讲个故事：老爸 Yum 的光辉岁月
很久很久以前（其实也就2003年），Fedora 社区里诞生了一个叫 Yum （Yellowdog Updater, Modified）的家伙。他的使命很朴素却也很伟大：帮你自动解决软件依赖问题。
在 Yum 出现之前，用 RPM 装软件就像徒手搭乐高------你装一个包，它告诉你缺 A，你去找 A，A 又告诉你缺 B，你再去装 B......恭喜你，已经陷进传说中的**"依赖地狱"**了。
Yum 横空出世，拍拍胸脯说："交给我！"------它自动下载、自动解析依赖、自动安装，简直就是那个年代的程序员之友。
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装软件
缺少依赖A
手动找A
缺少依赖B
手动找B
缺少依赖C
......崩溃了😭
用户
RPM
RPM
RPM
陷入依赖地狱
二、Yum 是怎么干活的？（架构图来了）
Yum 的架构其实非常清晰，核心思路就三件事：找源 → 解依赖 → 装包。
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缓存层
仓库层
Yum核心层
用户层
查询已装包
读取 repo 配置
读取 repo 配置
读取 repo 配置
下载并缓存
调用
输出安装/卸载列表
rpm -i
yum install 软件包
Yum CLI 前端
RPM 本地数据库
Base 仓库
EPEL 仓库
Updates 仓库
/var/cache/yum
元数据缓存
依赖求解器
自动计算依赖链
已安装软件包
Yum 的工作流其实就像你去食堂打饭------看看菜单（repo），想想今天吃啥（依赖解析），然后阿姨给你一顿猛打（安装）。
三、Yum 老了，DNF 来接班
Yum 用了十几年，慢慢的，大家发现这老伙计有几个**"慢性病"**：
| Yum 的毛病 | 症状 |
|---|---|
| Python 2 依赖 | Python 2 都退休了，Yum 还赖在上面不走 |
| 依赖解析慢 | 用的是自己写的 C 扩展，算法不给力，算依赖像在数绵羊 |
| 内存泄漏 | 用久了就"吃内存"，跟 Chrome 浏览器一个德性 |
| API 混乱 | 源码乱成一锅粥，维护者看了想辞职 |
| 并发能力差 | 一次只能干一件事，多任务？不存在的 |
于是，2012年 Fedora 18 带来了新同学------DNF （DaNdiFied Yum）。名字很拗口对吧？其实它自己人也觉得拗口，后来又强行解释为 Dandified Yum（"被包装过的 Yum"，听着像前女友化了妆回来找你）。
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text{fill:lightgray;}#mermaid-svg-cp8w3YyR1b0xejAO .disabled text{fill:#efefef;}#mermaid-svg-cp8w3YyR1b0xejAO .section-root rect,#mermaid-svg-cp8w3YyR1b0xejAO .section-root path,#mermaid-svg-cp8w3YyR1b0xejAO .section-root circle{fill:hsl(240, 100%, 46.2745098039%);}#mermaid-svg-cp8w3YyR1b0xejAO .section-root text{fill:#ffffff;}#mermaid-svg-cp8w3YyR1b0xejAO .icon-container{height:100%;display:flex;justify-content:center;align-items:center;}#mermaid-svg-cp8w3YyR1b0xejAO .edge{fill:none;}#mermaid-svg-cp8w3YyR1b0xejAO .eventWrapper{filter:brightness(120%);}#mermaid-svg-cp8w3YyR1b0xejAO :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} 2003 Yum 诞生 解决 RPM 依赖地狱 2012 DNF 实验性发布 Fedora 18 引入 2015 Fedora 22 默认使用DNF DNF 正式上位 2019 RHEL 8 抛弃 Yum yum 命令变成 dnf的软链接 2024 Yum 彻底成为历史 对新用户来说它只是一个传说 Yum → DNF 进化史
四、DNF 的内部构造（现代工业风）
DNF 并不是从零开始写的------它站在 Yum 的肩膀上，但把核心引擎整个换掉了。
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数据存储层
依赖求解器
DNF 核心引擎
前端API层
dnf / yum 命令
Python API
DNF Daemon
(后台守护进程)
Hawkey
(高效的查询库)
libdnf
(C++ 底层库)
Delta RPM
(增量更新支持)
libsolv
(SAT求解器, 速度飙升)
SQLite 数据库
替代 Yum 的 XML 缓存
RPM 本地数据库
BaseOS
AppStream
EPEL
Copr
DNF 把依赖求解换成了 libsolv（基于 SAT 算法），这就像把一辆老捷达的发动机换成了 F1 赛车的------外观还是那辆车，但一脚油门下去直接起飞。
五、Yum vs DNF：父子终极对决
#mermaid-svg-LgZmduFGmKzIkNiL{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-LgZmduFGmKzIkNiL .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-LgZmduFGmKzIkNiL .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-LgZmduFGmKzIkNiL .error-icon{fill:#552222;}#mermaid-svg-LgZmduFGmKzIkNiL .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-LgZmduFGmKzIkNiL .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-LgZmduFGmKzIkNiL .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-LgZmduFGmKzIkNiL .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-LgZmduFGmKzIkNiL .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-LgZmduFGmKzIkNiL .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-LgZmduFGmKzIkNiL .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-LgZmduFGmKzIkNiL .marker{fill:#333333;stroke:#333333;}#mermaid-svg-LgZmduFGmKzIkNiL .marker.cross{stroke:#333333;}#mermaid-svg-LgZmduFGmKzIkNiL svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-LgZmduFGmKzIkNiL p{margin:0;}#mermaid-svg-LgZmduFGmKzIkNiL .label{font-family:"trebuchet ms",verdana,arial,sans-serif;color:#333;}#mermaid-svg-LgZmduFGmKzIkNiL .cluster-label text{fill:#333;}#mermaid-svg-LgZmduFGmKzIkNiL .cluster-label span{color:#333;}#mermaid-svg-LgZmduFGmKzIkNiL .cluster-label span p{background-color:transparent;}#mermaid-svg-LgZmduFGmKzIkNiL .label text,#mermaid-svg-LgZmduFGmKzIkNiL span{fill:#333;color:#333;}#mermaid-svg-LgZmduFGmKzIkNiL .node rect,#mermaid-svg-LgZmduFGmKzIkNiL .node circle,#mermaid-svg-LgZmduFGmKzIkNiL .node ellipse,#mermaid-svg-LgZmduFGmKzIkNiL .node polygon,#mermaid-svg-LgZmduFGmKzIkNiL .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-LgZmduFGmKzIkNiL .rough-node .label text,#mermaid-svg-LgZmduFGmKzIkNiL .node .label text,#mermaid-svg-LgZmduFGmKzIkNiL .image-shape .label,#mermaid-svg-LgZmduFGmKzIkNiL .icon-shape .label{text-anchor:middle;}#mermaid-svg-LgZmduFGmKzIkNiL .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-LgZmduFGmKzIkNiL .rough-node .label,#mermaid-svg-LgZmduFGmKzIkNiL .node .label,#mermaid-svg-LgZmduFGmKzIkNiL .image-shape .label,#mermaid-svg-LgZmduFGmKzIkNiL .icon-shape .label{text-align:center;}#mermaid-svg-LgZmduFGmKzIkNiL .node.clickable{cursor:pointer;}#mermaid-svg-LgZmduFGmKzIkNiL .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-LgZmduFGmKzIkNiL .arrowheadPath{fill:#333333;}#mermaid-svg-LgZmduFGmKzIkNiL .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-LgZmduFGmKzIkNiL .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-LgZmduFGmKzIkNiL .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-LgZmduFGmKzIkNiL .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-LgZmduFGmKzIkNiL .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-LgZmduFGmKzIkNiL .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-LgZmduFGmKzIkNiL .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-LgZmduFGmKzIkNiL .cluster text{fill:#333;}#mermaid-svg-LgZmduFGmKzIkNiL .cluster span{color:#333;}#mermaid-svg-LgZmduFGmKzIkNiL div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-LgZmduFGmKzIkNiL .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-LgZmduFGmKzIkNiL rect.text{fill:none;stroke-width:0;}#mermaid-svg-LgZmduFGmKzIkNiL .icon-shape,#mermaid-svg-LgZmduFGmKzIkNiL .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-LgZmduFGmKzIkNiL .icon-shape p,#mermaid-svg-LgZmduFGmKzIkNiL .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-LgZmduFGmKzIkNiL .icon-shape .label rect,#mermaid-svg-LgZmduFGmKzIkNiL .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-LgZmduFGmKzIkNiL .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-LgZmduFGmKzIkNiL .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-LgZmduFGmKzIkNiL :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} 🚀 DNF (2012-至今)
🐢 Yum (2003-2019)
升级!
升级!
升级!
修复!
重写!
加功能!
Python 2 编写
XML 元数据存储
（文件多、加载慢）
自研 C 扩展
（依赖解析慢）
内存泄漏
（用久了就胀）
API 不友好
（二次开发头疼）
不支持增量更新
Python 3 + C++ 混合
SQLite 数据库
（加载飞快）
libsolv SAT 求解器
（毫秒级解析）
内存管理优化
（告别泄漏）
完善的 Python API
（二次开发友好）
支持 Delta RPM
（增量更新省流量）
六、DNF 的独门武功
1. Delta RPM ------ 只下载"差异"部分
传统 Yum 更新一个软件包，即使只改了一行代码，也得整个包重新下载一遍。DNF 的 Delta RPM 技术只下载新旧版本之间的差异，自动在本地合成新包。
#mermaid-svg-XJri2IxtSf4J9dL5{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-XJri2IxtSf4J9dL5 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-XJri2IxtSf4J9dL5 .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-XJri2IxtSf4J9dL5 .error-icon{fill:#552222;}#mermaid-svg-XJri2IxtSf4J9dL5 .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-XJri2IxtSf4J9dL5 .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-XJri2IxtSf4J9dL5 .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-XJri2IxtSf4J9dL5 .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-XJri2IxtSf4J9dL5 .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-XJri2IxtSf4J9dL5 .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-XJri2IxtSf4J9dL5 .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-XJri2IxtSf4J9dL5 .marker{fill:#333333;stroke:#333333;}#mermaid-svg-XJri2IxtSf4J9dL5 .marker.cross{stroke:#333333;}#mermaid-svg-XJri2IxtSf4J9dL5 svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-XJri2IxtSf4J9dL5 p{margin:0;}#mermaid-svg-XJri2IxtSf4J9dL5 .label{font-family:"trebuchet ms",verdana,arial,sans-serif;color:#333;}#mermaid-svg-XJri2IxtSf4J9dL5 .cluster-label text{fill:#333;}#mermaid-svg-XJri2IxtSf4J9dL5 .cluster-label span{color:#333;}#mermaid-svg-XJri2IxtSf4J9dL5 .cluster-label span p{background-color:transparent;}#mermaid-svg-XJri2IxtSf4J9dL5 .label text,#mermaid-svg-XJri2IxtSf4J9dL5 span{fill:#333;color:#333;}#mermaid-svg-XJri2IxtSf4J9dL5 .node rect,#mermaid-svg-XJri2IxtSf4J9dL5 .node circle,#mermaid-svg-XJri2IxtSf4J9dL5 .node ellipse,#mermaid-svg-XJri2IxtSf4J9dL5 .node polygon,#mermaid-svg-XJri2IxtSf4J9dL5 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-XJri2IxtSf4J9dL5 .rough-node .label text,#mermaid-svg-XJri2IxtSf4J9dL5 .node .label text,#mermaid-svg-XJri2IxtSf4J9dL5 .image-shape .label,#mermaid-svg-XJri2IxtSf4J9dL5 .icon-shape .label{text-anchor:middle;}#mermaid-svg-XJri2IxtSf4J9dL5 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-XJri2IxtSf4J9dL5 .rough-node .label,#mermaid-svg-XJri2IxtSf4J9dL5 .node .label,#mermaid-svg-XJri2IxtSf4J9dL5 .image-shape .label,#mermaid-svg-XJri2IxtSf4J9dL5 .icon-shape .label{text-align:center;}#mermaid-svg-XJri2IxtSf4J9dL5 .node.clickable{cursor:pointer;}#mermaid-svg-XJri2IxtSf4J9dL5 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-XJri2IxtSf4J9dL5 .arrowheadPath{fill:#333333;}#mermaid-svg-XJri2IxtSf4J9dL5 .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-XJri2IxtSf4J9dL5 .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-XJri2IxtSf4J9dL5 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-XJri2IxtSf4J9dL5 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-XJri2IxtSf4J9dL5 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-XJri2IxtSf4J9dL5 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-XJri2IxtSf4J9dL5 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-XJri2IxtSf4J9dL5 .cluster text{fill:#333;}#mermaid-svg-XJri2IxtSf4J9dL5 .cluster span{color:#333;}#mermaid-svg-XJri2IxtSf4J9dL5 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-XJri2IxtSf4J9dL5 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-XJri2IxtSf4J9dL5 rect.text{fill:none;stroke-width:0;}#mermaid-svg-XJri2IxtSf4J9dL5 .icon-shape,#mermaid-svg-XJri2IxtSf4J9dL5 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-XJri2IxtSf4J9dL5 .icon-shape p,#mermaid-svg-XJri2IxtSf4J9dL5 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-XJri2IxtSf4J9dL5 .icon-shape .label rect,#mermaid-svg-XJri2IxtSf4J9dL5 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-XJri2IxtSf4J9dL5 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-XJri2IxtSf4J9dL5 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-XJri2IxtSf4J9dL5 :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} 旧版本 v1.0
100MB
Delta 差异
只下载 5MB
合成新版本 v1.1
省流量？是的，DNF 帮你的服务器省下的带宽，够你再开一台云主机了。
2. 事务化操作
bash
# 回滚上一次操作（没错，DNF 有"后悔药"）
dnf history undo last
# 查看操作历史
dnf history listDNF 会记录每一次安装/卸载/更新操作，生成事务 ID。出问题了？一键回滚，比时光机还好使。
3. 模块化流（Modularity）
RHEL 8 / CentOS 8 引入的模块化概念，同一个软件可以有多个版本流，互不冲突。
#mermaid-svg-VgF6m4UdyVBt3Fb5{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .error-icon{fill:#552222;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .marker{fill:#333333;stroke:#333333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .marker.cross{stroke:#333333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-VgF6m4UdyVBt3Fb5 p{margin:0;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .label{font-family:"trebuchet ms",verdana,arial,sans-serif;color:#333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .cluster-label text{fill:#333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .cluster-label span{color:#333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .cluster-label span p{background-color:transparent;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .label text,#mermaid-svg-VgF6m4UdyVBt3Fb5 span{fill:#333;color:#333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .node rect,#mermaid-svg-VgF6m4UdyVBt3Fb5 .node circle,#mermaid-svg-VgF6m4UdyVBt3Fb5 .node ellipse,#mermaid-svg-VgF6m4UdyVBt3Fb5 .node polygon,#mermaid-svg-VgF6m4UdyVBt3Fb5 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .rough-node .label text,#mermaid-svg-VgF6m4UdyVBt3Fb5 .node .label text,#mermaid-svg-VgF6m4UdyVBt3Fb5 .image-shape .label,#mermaid-svg-VgF6m4UdyVBt3Fb5 .icon-shape .label{text-anchor:middle;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .rough-node .label,#mermaid-svg-VgF6m4UdyVBt3Fb5 .node .label,#mermaid-svg-VgF6m4UdyVBt3Fb5 .image-shape .label,#mermaid-svg-VgF6m4UdyVBt3Fb5 .icon-shape .label{text-align:center;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .node.clickable{cursor:pointer;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .arrowheadPath{fill:#333333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-VgF6m4UdyVBt3Fb5 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-VgF6m4UdyVBt3Fb5 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-VgF6m4UdyVBt3Fb5 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .cluster text{fill:#333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .cluster span{color:#333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-VgF6m4UdyVBt3Fb5 rect.text{fill:none;stroke-width:0;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .icon-shape,#mermaid-svg-VgF6m4UdyVBt3Fb5 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .icon-shape p,#mermaid-svg-VgF6m4UdyVBt3Fb5 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .icon-shape .label rect,#mermaid-svg-VgF6m4UdyVBt3Fb5 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-VgF6m4UdyVBt3Fb5 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-VgF6m4UdyVBt3Fb5 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-VgF6m4UdyVBt3Fb5 :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} Python 模块
Node.js 模块
Node.js 10 流
Node.js 12 流
Node.js 18 流
Python 2.7 流
Python 3.6 流
Python 3.9 流
应用程序A
需要 Node 14 + Python 3.9
应用程序B
需要 Node 10 + Python 2.7
模块化简直是运维福音------再也不用为了装不同版本的软件而打架了。
七、常用命令速查（附幽默翻译）
| 命令 | 正经翻译 | 接地气翻译 |
|---|---|---|
dnf search <关键字> |
搜索软件包 | "老王，咱仓库里有这玩意儿吗？" |
dnf install <包名> |
安装软件包 | "老板，这个！打包带走！" |
dnf remove <包名> |
卸载软件包 | "这软件不好使，退货！" |
dnf update |
更新所有软件包 | "全部给我换成最新款！" |
dnf upgrade |
升级系统（可过时包） | "大扫除，过时的都扔了！" |
dnf info <包名> |
查看软件包信息 | "把这东西的户口本调出来看看" |
dnf list installed |
列出已安装软件包 | "让我瞅瞅我都装了些啥" |
dnf repolist |
列出仓库 | "看看咱家有几家供应商" |
dnf history |
查看操作历史 | "翻翻小本本，刚才我都干啥了" |
dnf autoremove |
自动卸载孤儿依赖 | "当初为了你装的，现在你也走了，它们也该走了" |
dnf downgrade <包名> |
降级软件包 | "新版本太拉了，退回去！" |
八、yum 命令还能用吗？
在 RHEL 8 / CentOS 8 及之后的系统里，你敲 yum install xxx，系统仍然会乖乖执行------因为 /usr/bin/yum 本质上已经是 DNF 的软链接了：
bash
$ ls -l /usr/bin/yum
lrwxrwxrwx. 1 root root 5 /usr/bin/yum -> dnf-3说白了，你喊的是"Yum"，但来干活的是 DNF。这就像你妈喊你小名，但你已经是成年人了------名字没变，内核不一样了。
九、CentOS 7 能装 DNF 吗？------"老房子装新空调"
这是个灵魂拷问。CentOS 7 的原配是 Yum，但 DNF 是可以装上去的------前提是你别指望它"全面接管"。
#mermaid-svg-Vds72WdR3WLhEGl3{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-Vds72WdR3WLhEGl3 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-Vds72WdR3WLhEGl3 .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-Vds72WdR3WLhEGl3 .error-icon{fill:#552222;}#mermaid-svg-Vds72WdR3WLhEGl3 .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-Vds72WdR3WLhEGl3 .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-Vds72WdR3WLhEGl3 .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-Vds72WdR3WLhEGl3 .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-Vds72WdR3WLhEGl3 .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-Vds72WdR3WLhEGl3 .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-Vds72WdR3WLhEGl3 .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-Vds72WdR3WLhEGl3 .marker{fill:#333333;stroke:#333333;}#mermaid-svg-Vds72WdR3WLhEGl3 .marker.cross{stroke:#333333;}#mermaid-svg-Vds72WdR3WLhEGl3 svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-Vds72WdR3WLhEGl3 p{margin:0;}#mermaid-svg-Vds72WdR3WLhEGl3 .label{font-family:"trebuchet ms",verdana,arial,sans-serif;color:#333;}#mermaid-svg-Vds72WdR3WLhEGl3 .cluster-label text{fill:#333;}#mermaid-svg-Vds72WdR3WLhEGl3 .cluster-label span{color:#333;}#mermaid-svg-Vds72WdR3WLhEGl3 .cluster-label span p{background-color:transparent;}#mermaid-svg-Vds72WdR3WLhEGl3 .label text,#mermaid-svg-Vds72WdR3WLhEGl3 span{fill:#333;color:#333;}#mermaid-svg-Vds72WdR3WLhEGl3 .node rect,#mermaid-svg-Vds72WdR3WLhEGl3 .node circle,#mermaid-svg-Vds72WdR3WLhEGl3 .node ellipse,#mermaid-svg-Vds72WdR3WLhEGl3 .node polygon,#mermaid-svg-Vds72WdR3WLhEGl3 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-Vds72WdR3WLhEGl3 .rough-node .label text,#mermaid-svg-Vds72WdR3WLhEGl3 .node .label text,#mermaid-svg-Vds72WdR3WLhEGl3 .image-shape .label,#mermaid-svg-Vds72WdR3WLhEGl3 .icon-shape .label{text-anchor:middle;}#mermaid-svg-Vds72WdR3WLhEGl3 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-Vds72WdR3WLhEGl3 .rough-node .label,#mermaid-svg-Vds72WdR3WLhEGl3 .node .label,#mermaid-svg-Vds72WdR3WLhEGl3 .image-shape .label,#mermaid-svg-Vds72WdR3WLhEGl3 .icon-shape .label{text-align:center;}#mermaid-svg-Vds72WdR3WLhEGl3 .node.clickable{cursor:pointer;}#mermaid-svg-Vds72WdR3WLhEGl3 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-Vds72WdR3WLhEGl3 .arrowheadPath{fill:#333333;}#mermaid-svg-Vds72WdR3WLhEGl3 .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-Vds72WdR3WLhEGl3 .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-Vds72WdR3WLhEGl3 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-Vds72WdR3WLhEGl3 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-Vds72WdR3WLhEGl3 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-Vds72WdR3WLhEGl3 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-Vds72WdR3WLhEGl3 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-Vds72WdR3WLhEGl3 .cluster text{fill:#333;}#mermaid-svg-Vds72WdR3WLhEGl3 .cluster span{color:#333;}#mermaid-svg-Vds72WdR3WLhEGl3 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-Vds72WdR3WLhEGl3 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-Vds72WdR3WLhEGl3 rect.text{fill:none;stroke-width:0;}#mermaid-svg-Vds72WdR3WLhEGl3 .icon-shape,#mermaid-svg-Vds72WdR3WLhEGl3 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-Vds72WdR3WLhEGl3 .icon-shape p,#mermaid-svg-Vds72WdR3WLhEGl3 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-Vds72WdR3WLhEGl3 .icon-shape .label rect,#mermaid-svg-Vds72WdR3WLhEGl3 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-Vds72WdR3WLhEGl3 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-Vds72WdR3WLhEGl3 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-Vds72WdR3WLhEGl3 :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} EPEL 仓库
CentOS 7 系统
yum install dnf
安装后
安装结果
yum 和 dnf 共存
⚠️ 但功能受限
模块化 ❌
部分仓库兼容 ❌
基础的 install/search 可用 ✅
yum (原生)
Python 2 + RPM 4.x
dnf 安装包
（可由 yum 安装）
安装步骤
bash
# 1. 先装上 EPEL 仓库（CentOS 7 的扩展包来源）
yum install -y epel-release
# 2. 从 EPEL 安装 dnf
yum install -y dnf
# 3. 验证一下
dnf --version能干啥？不能干啥？
| 功能 | CentOS 7 上的 DNF | 说明 |
|---|---|---|
search / install / remove |
✅ | 基本操作没问题 |
history |
✅ | 回滚也能用 |
repolist |
✅ | 查仓库正常 |
| 模块化 (module) | ❌ | CentOS 7 不支持模块化，DNA 缺陷 |
| AppStream | ❌ | 同上，需要系统级支持 |
| 自动替代 yum | ❌ | /usr/bin/yum 还是原版 yum，不会软链到 dnf |
总结：CentOS 7 装 DNF 就像给一台老式收音机装蓝牙------能响，但别幻想它能变成 Bose 音箱。日常用 yum 就够了，装 DNF 纯属尝鲜。到了 RHEL 8 / CentOS 8，DNF 才是正宫娘娘。
十、如何指定和配置仓库------"你的外卖菜单归谁管"
不管是 Yum 还是 DNF，它们都需要知道"去哪取货"。这个"取货地址"就是仓库 （Repository），配置文件都躺在 /etc/yum.repos.d/ 目录下，以 .repo 结尾。
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配置层
/etc/yum.repos.d/
存放 .repo 文件
CentOS-Base.repo
epel.repo
docker-ce.repo
自建的 local.repo
仓库ID ← 唯一标识，别重复
name=仓库描述
baseurl=仓库地址
enabled=1 ← 是否启用 (1=是, 0=否)
gpgcheck=1 ← 是否校验 GPG 签名
gpgkey=GPG密钥文件路径
priority=1 ← 优先级 (数字越小越优先)
一个完整的 .repo 文件长这样
ini
[my-custom-repo]
name=My Custom Repository - CentOS 7 Base
baseurl=http://mirrors.aliyun.com/centos/7/os/x86_64/
# 或者用本地路径: file:///mnt/cdrom
# 或者用 FTP: ftp://192.168.1.100/repo
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
priority=1仓库地址 (baseurl) 的三种写法
| 协议 | 示例 | 场景 |
|---|---|---|
http:// |
http://mirrors.aliyun.com/centos/7/os/x86_64/ |
互联网/内网 远程仓库 |
file:// |
file:///mnt/iso |
本地挂载的光盘或目录 |
ftp:// |
ftp://192.168.1.100/pub/repo |
局域网 FTP 服务器 |
同一个仓库配多个镜像（mirrorlist）
ini
[base]
name=CentOS-$releasever - Base
# 用 mirrorlist 让系统自动选最快的镜像
mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
# baseurl 可以作为备胎，当 mirrorlist 挂了时顶上
baseurl=http://vault.centos.org/centos/$releasever/os/$basearch/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
$releasever和$basearch是 Yum/DNF 内置变量，自动替换成系统版本和架构（如7和x86_64），省得你手动改。
仓库优先级：防止"抢单"
当多个仓库都提供同一个软件包时，装哪个？这时候需要装 yum-plugin-priorities（或 DNF 内置的 priority）来定规矩：
bash
# CentOS 7 / Yum
yum install -y yum-plugin-priorities
# 然后在 .repo 文件里加一行
priority=1 # 数字越小越优先，范围 1-99#mermaid-svg-J0a1ux9vgpTMxL6h{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-J0a1ux9vgpTMxL6h .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-J0a1ux9vgpTMxL6h .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-J0a1ux9vgpTMxL6h .error-icon{fill:#552222;}#mermaid-svg-J0a1ux9vgpTMxL6h .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-J0a1ux9vgpTMxL6h .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-J0a1ux9vgpTMxL6h .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-J0a1ux9vgpTMxL6h .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-J0a1ux9vgpTMxL6h .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-J0a1ux9vgpTMxL6h .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-J0a1ux9vgpTMxL6h .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-J0a1ux9vgpTMxL6h .marker{fill:#333333;stroke:#333333;}#mermaid-svg-J0a1ux9vgpTMxL6h .marker.cross{stroke:#333333;}#mermaid-svg-J0a1ux9vgpTMxL6h svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-J0a1ux9vgpTMxL6h p{margin:0;}#mermaid-svg-J0a1ux9vgpTMxL6h .label{font-family:"trebuchet ms",verdana,arial,sans-serif;color:#333;}#mermaid-svg-J0a1ux9vgpTMxL6h .cluster-label text{fill:#333;}#mermaid-svg-J0a1ux9vgpTMxL6h .cluster-label span{color:#333;}#mermaid-svg-J0a1ux9vgpTMxL6h .cluster-label span p{background-color:transparent;}#mermaid-svg-J0a1ux9vgpTMxL6h .label text,#mermaid-svg-J0a1ux9vgpTMxL6h span{fill:#333;color:#333;}#mermaid-svg-J0a1ux9vgpTMxL6h .node rect,#mermaid-svg-J0a1ux9vgpTMxL6h .node circle,#mermaid-svg-J0a1ux9vgpTMxL6h .node ellipse,#mermaid-svg-J0a1ux9vgpTMxL6h .node polygon,#mermaid-svg-J0a1ux9vgpTMxL6h .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-J0a1ux9vgpTMxL6h .rough-node .label text,#mermaid-svg-J0a1ux9vgpTMxL6h .node .label text,#mermaid-svg-J0a1ux9vgpTMxL6h .image-shape .label,#mermaid-svg-J0a1ux9vgpTMxL6h .icon-shape .label{text-anchor:middle;}#mermaid-svg-J0a1ux9vgpTMxL6h .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-J0a1ux9vgpTMxL6h .rough-node .label,#mermaid-svg-J0a1ux9vgpTMxL6h .node .label,#mermaid-svg-J0a1ux9vgpTMxL6h .image-shape .label,#mermaid-svg-J0a1ux9vgpTMxL6h .icon-shape .label{text-align:center;}#mermaid-svg-J0a1ux9vgpTMxL6h .node.clickable{cursor:pointer;}#mermaid-svg-J0a1ux9vgpTMxL6h .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-J0a1ux9vgpTMxL6h .arrowheadPath{fill:#333333;}#mermaid-svg-J0a1ux9vgpTMxL6h .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-J0a1ux9vgpTMxL6h .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-J0a1ux9vgpTMxL6h .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-J0a1ux9vgpTMxL6h .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-J0a1ux9vgpTMxL6h .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-J0a1ux9vgpTMxL6h .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-J0a1ux9vgpTMxL6h .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-J0a1ux9vgpTMxL6h .cluster text{fill:#333;}#mermaid-svg-J0a1ux9vgpTMxL6h .cluster span{color:#333;}#mermaid-svg-J0a1ux9vgpTMxL6h div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-J0a1ux9vgpTMxL6h .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-J0a1ux9vgpTMxL6h rect.text{fill:none;stroke-width:0;}#mermaid-svg-J0a1ux9vgpTMxL6h .icon-shape,#mermaid-svg-J0a1ux9vgpTMxL6h .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-J0a1ux9vgpTMxL6h .icon-shape p,#mermaid-svg-J0a1ux9vgpTMxL6h .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-J0a1ux9vgpTMxL6h .icon-shape .label rect,#mermaid-svg-J0a1ux9vgpTMxL6h .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-J0a1ux9vgpTMxL6h .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-J0a1ux9vgpTMxL6h .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-J0a1ux9vgpTMxL6h :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} 混乱，看谁先被找到
规则清晰
有优先级
priority=1 自建仓库 ✅ 胜出
priority=10 官方仓库
priority=20 EPEL
无优先级
EPEL 仓库
nginx v1.20
官方仓库
nginx v1.14
自建仓库
nginx v1.18
可能装到 1.14
也可能装到 1.20
全看运气 😅
必定装 1.18
自建仓库最优先
常用仓库管理命令
bash
# 列出所有仓库
yum repolist # 只看启用的
yum repolist all # 包括禁用的
# 临时禁用某个仓库
yum install --disablerepo=epel 软件包名
yum install --enablerepo=epel 软件包名 # 临时启用
# 查看仓库里有没有这个包
yum list available | grep nginx
# 清缓存（改完 repo 配置后必须执行）
yum clean all
yum makecache # 重建缓存改完
.repo文件一定要yum clean all && yum makecache，不然 Yum/DNF 会抱着过期缓存死不松手，跟抱着前任照片不放一样倔。
十一、离线仓库搭建------"没网？咱自己开一家超市！"
生产环境很多服务器是纯内网、物理隔离 的，连不上互联网。这时候就得自己动手，丰衣足食------搭建本地离线仓库。
方案对比
#mermaid-svg-Rr5QzyI486Cg8IyF{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-Rr5QzyI486Cg8IyF .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-Rr5QzyI486Cg8IyF .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-Rr5QzyI486Cg8IyF .error-icon{fill:#552222;}#mermaid-svg-Rr5QzyI486Cg8IyF .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-Rr5QzyI486Cg8IyF .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-Rr5QzyI486Cg8IyF .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-Rr5QzyI486Cg8IyF .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-Rr5QzyI486Cg8IyF .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-Rr5QzyI486Cg8IyF .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-Rr5QzyI486Cg8IyF .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-Rr5QzyI486Cg8IyF .marker{fill:#333333;stroke:#333333;}#mermaid-svg-Rr5QzyI486Cg8IyF .marker.cross{stroke:#333333;}#mermaid-svg-Rr5QzyI486Cg8IyF svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-Rr5QzyI486Cg8IyF p{margin:0;}#mermaid-svg-Rr5QzyI486Cg8IyF .label{font-family:"trebuchet ms",verdana,arial,sans-serif;color:#333;}#mermaid-svg-Rr5QzyI486Cg8IyF .cluster-label text{fill:#333;}#mermaid-svg-Rr5QzyI486Cg8IyF .cluster-label span{color:#333;}#mermaid-svg-Rr5QzyI486Cg8IyF .cluster-label span p{background-color:transparent;}#mermaid-svg-Rr5QzyI486Cg8IyF .label text,#mermaid-svg-Rr5QzyI486Cg8IyF span{fill:#333;color:#333;}#mermaid-svg-Rr5QzyI486Cg8IyF .node rect,#mermaid-svg-Rr5QzyI486Cg8IyF .node circle,#mermaid-svg-Rr5QzyI486Cg8IyF .node ellipse,#mermaid-svg-Rr5QzyI486Cg8IyF .node polygon,#mermaid-svg-Rr5QzyI486Cg8IyF .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-Rr5QzyI486Cg8IyF .rough-node .label text,#mermaid-svg-Rr5QzyI486Cg8IyF .node .label text,#mermaid-svg-Rr5QzyI486Cg8IyF .image-shape .label,#mermaid-svg-Rr5QzyI486Cg8IyF .icon-shape .label{text-anchor:middle;}#mermaid-svg-Rr5QzyI486Cg8IyF .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-Rr5QzyI486Cg8IyF .rough-node .label,#mermaid-svg-Rr5QzyI486Cg8IyF .node .label,#mermaid-svg-Rr5QzyI486Cg8IyF .image-shape .label,#mermaid-svg-Rr5QzyI486Cg8IyF .icon-shape .label{text-align:center;}#mermaid-svg-Rr5QzyI486Cg8IyF .node.clickable{cursor:pointer;}#mermaid-svg-Rr5QzyI486Cg8IyF .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-Rr5QzyI486Cg8IyF .arrowheadPath{fill:#333333;}#mermaid-svg-Rr5QzyI486Cg8IyF .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-Rr5QzyI486Cg8IyF .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-Rr5QzyI486Cg8IyF .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-Rr5QzyI486Cg8IyF .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-Rr5QzyI486Cg8IyF .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-Rr5QzyI486Cg8IyF .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-Rr5QzyI486Cg8IyF .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-Rr5QzyI486Cg8IyF .cluster text{fill:#333;}#mermaid-svg-Rr5QzyI486Cg8IyF .cluster span{color:#333;}#mermaid-svg-Rr5QzyI486Cg8IyF div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-Rr5QzyI486Cg8IyF .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-Rr5QzyI486Cg8IyF rect.text{fill:none;stroke-width:0;}#mermaid-svg-Rr5QzyI486Cg8IyF .icon-shape,#mermaid-svg-Rr5QzyI486Cg8IyF .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-Rr5QzyI486Cg8IyF .icon-shape p,#mermaid-svg-Rr5QzyI486Cg8IyF .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-Rr5QzyI486Cg8IyF .icon-shape .label rect,#mermaid-svg-Rr5QzyI486Cg8IyF .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-Rr5QzyI486Cg8IyF .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-Rr5QzyI486Cg8IyF .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-Rr5QzyI486Cg8IyF :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} 方案选择
有
没有
方案B：ISO 当仓库
- 挂载 CentOS ISO 镜像
- 直接写 .repo 指向挂载点
- 开箱即用 ✅
方案A：rsync 同步远程仓库 - 在一台能上网的机器上
rsync 同步整个仓库目录
2. 拷贝到内网服务器
3. 用 createrepo 重建索引
4. 通过 HTTP / FTP 或本地目录发布
你有互联网出口机器吗？
方案A：联网机同步 → 拷贝到内网
方案B：直接拿 ISO/DVD 当仓库
方案 A：全量同步远程仓库（适合内网多台机器共用）
第一步：在有网络的机器上同步仓库
bash
# 以 CentOS 7 为例，同步阿里云镜像站
# 这一步会下载几十 GB，请找个大硬盘、快网速的机器
# 同步 Base 仓库
rsync -avz --delete \
rsync://mirrors.aliyun.com/centos/7/os/x86_64/ \
/data/repo/centos/7/os/x86_64/
# 同步 Updates 仓库
rsync -avz --delete \
rsync://mirrors.aliyun.com/centos/7/updates/x86_64/ \
/data/repo/centos/7/updates/x86_64/
# 同步 EPEL 仓库
rsync -avz --delete \
rsync://mirrors.aliyun.com/epel/7/x86_64/ \
/data/repo/epel/7/x86_64/
--delete参数会让目标目录和源目录一模一样，源删了目标也删。不想删的话去掉它。注意：这个参数不是"删除本地文件"，而是"删除目标端不再存在于源端的文件"。
第二步：拷贝到内网服务器
bash
# 打好压缩包
tar -zcvf centos7-repo.tar.gz /data/repo/
# 通过 U盘 / 移动硬盘 / scp 等方式拷到内网服务器
# scp 示例（如果内网机器能从这台机器上去）：
scp -r /data/repo/ root@192.168.1.100:/data/repo/第三步：安装 createrepo 并重建索引
bash
# 安装 createrepo 工具
yum install -y createrepo
# 为每个仓库目录生成 repodata 元数据
createrepo /data/repo/centos/7/os/x86_64/
createrepo /data/repo/centos/7/updates/x86_64/
createrepo /data/repo/epel/7/x86_64/
# 如果有新包加入，用 --update 增量更新（比全量重建快很多）
createrepo --update /data/repo/centos/7/os/x86_64/#mermaid-svg-RubOyodKTkhKQOI6{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-RubOyodKTkhKQOI6 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-RubOyodKTkhKQOI6 .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-RubOyodKTkhKQOI6 .error-icon{fill:#552222;}#mermaid-svg-RubOyodKTkhKQOI6 .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-RubOyodKTkhKQOI6 .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-RubOyodKTkhKQOI6 .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-RubOyodKTkhKQOI6 .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-RubOyodKTkhKQOI6 .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-RubOyodKTkhKQOI6 .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-RubOyodKTkhKQOI6 .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-RubOyodKTkhKQOI6 .marker{fill:#333333;stroke:#333333;}#mermaid-svg-RubOyodKTkhKQOI6 .marker.cross{stroke:#333333;}#mermaid-svg-RubOyodKTkhKQOI6 svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-RubOyodKTkhKQOI6 p{margin:0;}#mermaid-svg-RubOyodKTkhKQOI6 .label{font-family:"trebuchet ms",verdana,arial,sans-serif;color:#333;}#mermaid-svg-RubOyodKTkhKQOI6 .cluster-label text{fill:#333;}#mermaid-svg-RubOyodKTkhKQOI6 .cluster-label span{color:#333;}#mermaid-svg-RubOyodKTkhKQOI6 .cluster-label span p{background-color:transparent;}#mermaid-svg-RubOyodKTkhKQOI6 .label text,#mermaid-svg-RubOyodKTkhKQOI6 span{fill:#333;color:#333;}#mermaid-svg-RubOyodKTkhKQOI6 .node rect,#mermaid-svg-RubOyodKTkhKQOI6 .node circle,#mermaid-svg-RubOyodKTkhKQOI6 .node ellipse,#mermaid-svg-RubOyodKTkhKQOI6 .node polygon,#mermaid-svg-RubOyodKTkhKQOI6 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-RubOyodKTkhKQOI6 .rough-node .label text,#mermaid-svg-RubOyodKTkhKQOI6 .node .label text,#mermaid-svg-RubOyodKTkhKQOI6 .image-shape .label,#mermaid-svg-RubOyodKTkhKQOI6 .icon-shape .label{text-anchor:middle;}#mermaid-svg-RubOyodKTkhKQOI6 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-RubOyodKTkhKQOI6 .rough-node .label,#mermaid-svg-RubOyodKTkhKQOI6 .node .label,#mermaid-svg-RubOyodKTkhKQOI6 .image-shape .label,#mermaid-svg-RubOyodKTkhKQOI6 .icon-shape .label{text-align:center;}#mermaid-svg-RubOyodKTkhKQOI6 .node.clickable{cursor:pointer;}#mermaid-svg-RubOyodKTkhKQOI6 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-RubOyodKTkhKQOI6 .arrowheadPath{fill:#333333;}#mermaid-svg-RubOyodKTkhKQOI6 .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-RubOyodKTkhKQOI6 .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-RubOyodKTkhKQOI6 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-RubOyodKTkhKQOI6 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-RubOyodKTkhKQOI6 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-RubOyodKTkhKQOI6 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-RubOyodKTkhKQOI6 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-RubOyodKTkhKQOI6 .cluster text{fill:#333;}#mermaid-svg-RubOyodKTkhKQOI6 .cluster span{color:#333;}#mermaid-svg-RubOyodKTkhKQOI6 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-RubOyodKTkhKQOI6 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-RubOyodKTkhKQOI6 rect.text{fill:none;stroke-width:0;}#mermaid-svg-RubOyodKTkhKQOI6 .icon-shape,#mermaid-svg-RubOyodKTkhKQOI6 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-RubOyodKTkhKQOI6 .icon-shape p,#mermaid-svg-RubOyodKTkhKQOI6 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-RubOyodKTkhKQOI6 .icon-shape .label rect,#mermaid-svg-RubOyodKTkhKQOI6 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-RubOyodKTkhKQOI6 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-RubOyodKTkhKQOI6 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-RubOyodKTkhKQOI6 :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} createrepo
一堆 RPM 文件
kernel-3.10.rpm
nginx-1.20.rpm
openssl-1.0.rpm
...成百上千个
repodata/
├─ filelists.xml.gz
├─ primary.xml.gz
├─ other.xml.gz
└─ repomd.xml
（Yum/DNF 靠这些索引找人）
仓库目录
createrepo的作用就是把一堆散装的 RPM 文件归档成"超市货架"------Yum/DNF 来了之后先翻货架目录（repodata），找到东西在哪，再精准拿取。
第四步：提供访问方式
方式 1：本地目录（最简单）
ini
# /etc/yum.repos.d/local.repo
[local-base]
name=Local CentOS 7 Base
baseurl=file:///data/repo/centos/7/os/x86_64/
enabled=1
gpgcheck=0 # 自己搭的仓库一般关掉签名校验
[local-updates]
name=Local CentOS 7 Updates
baseurl=file:///data/repo/centos/7/updates/x86_64/
enabled=1
gpgcheck=0
[local-epel]
name=Local EPEL
baseurl=file:///data/repo/epel/7/x86_64/
enabled=1
gpgcheck=0缺点：只能本机用。适合单机场景。
方式 2：HTTP 服务（局域网共享，推荐）
bash
# 装个 nginx 或 httpd
yum install -y nginx
# 配置 nginx，指向仓库目录
cat > /etc/nginx/conf.d/repo.conf << 'EOF'
server {
listen 80;
server_name 192.168.1.100; # 替换成你的内网 IP
location /repo/ {
alias /data/repo/;
autoindex on; # 允许列目录
autoindex_exact_size off;
autoindex_localtime on;
}
}
EOF
# 启动 nginx
systemctl start nginx
systemctl enable nginx
# 别忘了防火墙放行 80 端口
firewall-cmd --add-port=80/tcp --permanent
firewall-cmd --reload然后其他内网机器的 .repo 文件这样写：
ini
[local-http-base]
name=Local CentOS 7 Base via HTTP
baseurl=http://192.168.1.100/repo/centos/7/os/x86_64/
enabled=1
gpgcheck=0#mermaid-svg-P8XLiw7m3ICZcFsb{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-P8XLiw7m3ICZcFsb .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-P8XLiw7m3ICZcFsb .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-P8XLiw7m3ICZcFsb .error-icon{fill:#552222;}#mermaid-svg-P8XLiw7m3ICZcFsb .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-P8XLiw7m3ICZcFsb .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-P8XLiw7m3ICZcFsb .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-P8XLiw7m3ICZcFsb .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-P8XLiw7m3ICZcFsb .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-P8XLiw7m3ICZcFsb .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-P8XLiw7m3ICZcFsb .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-P8XLiw7m3ICZcFsb .marker{fill:#333333;stroke:#333333;}#mermaid-svg-P8XLiw7m3ICZcFsb .marker.cross{stroke:#333333;}#mermaid-svg-P8XLiw7m3ICZcFsb svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-P8XLiw7m3ICZcFsb p{margin:0;}#mermaid-svg-P8XLiw7m3ICZcFsb .label{font-family:"trebuchet ms",verdana,arial,sans-serif;color:#333;}#mermaid-svg-P8XLiw7m3ICZcFsb .cluster-label text{fill:#333;}#mermaid-svg-P8XLiw7m3ICZcFsb .cluster-label span{color:#333;}#mermaid-svg-P8XLiw7m3ICZcFsb .cluster-label span p{background-color:transparent;}#mermaid-svg-P8XLiw7m3ICZcFsb .label text,#mermaid-svg-P8XLiw7m3ICZcFsb span{fill:#333;color:#333;}#mermaid-svg-P8XLiw7m3ICZcFsb .node rect,#mermaid-svg-P8XLiw7m3ICZcFsb .node circle,#mermaid-svg-P8XLiw7m3ICZcFsb .node ellipse,#mermaid-svg-P8XLiw7m3ICZcFsb .node polygon,#mermaid-svg-P8XLiw7m3ICZcFsb .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-P8XLiw7m3ICZcFsb .rough-node .label text,#mermaid-svg-P8XLiw7m3ICZcFsb .node .label text,#mermaid-svg-P8XLiw7m3ICZcFsb .image-shape .label,#mermaid-svg-P8XLiw7m3ICZcFsb .icon-shape .label{text-anchor:middle;}#mermaid-svg-P8XLiw7m3ICZcFsb .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-P8XLiw7m3ICZcFsb .rough-node .label,#mermaid-svg-P8XLiw7m3ICZcFsb .node .label,#mermaid-svg-P8XLiw7m3ICZcFsb .image-shape .label,#mermaid-svg-P8XLiw7m3ICZcFsb .icon-shape .label{text-align:center;}#mermaid-svg-P8XLiw7m3ICZcFsb .node.clickable{cursor:pointer;}#mermaid-svg-P8XLiw7m3ICZcFsb .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-P8XLiw7m3ICZcFsb .arrowheadPath{fill:#333333;}#mermaid-svg-P8XLiw7m3ICZcFsb .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-P8XLiw7m3ICZcFsb .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-P8XLiw7m3ICZcFsb .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-P8XLiw7m3ICZcFsb .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-P8XLiw7m3ICZcFsb .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-P8XLiw7m3ICZcFsb .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-P8XLiw7m3ICZcFsb .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-P8XLiw7m3ICZcFsb .cluster text{fill:#333;}#mermaid-svg-P8XLiw7m3ICZcFsb .cluster span{color:#333;}#mermaid-svg-P8XLiw7m3ICZcFsb div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-P8XLiw7m3ICZcFsb .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-P8XLiw7m3ICZcFsb rect.text{fill:none;stroke-width:0;}#mermaid-svg-P8XLiw7m3ICZcFsb .icon-shape,#mermaid-svg-P8XLiw7m3ICZcFsb .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-P8XLiw7m3ICZcFsb .icon-shape p,#mermaid-svg-P8XLiw7m3ICZcFsb .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-P8XLiw7m3ICZcFsb .icon-shape .label rect,#mermaid-svg-P8XLiw7m3ICZcFsb .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-P8XLiw7m3ICZcFsb .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-P8XLiw7m3ICZcFsb .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-P8XLiw7m3ICZcFsb :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} 内网
HTTP 分发
HTTP 分发
HTTP 分发
HTTP 分发
仓库服务器
192.168.1.100
nginx 提供 HTTP 服务
客户端A
192.168.1.10
客户端B
192.168.1.11
客户端C
192.168.1.12
......
最多几百台都行
方案 B：直接用 ISO 镜像当仓库（适合临时或装机场景）
这是最简单粗暴的方式------CentOS 的安装 ISO 本身就自带完整的 Base 仓库。
bash
# 1. 挂载 ISO（假设 ISO 在 /root/CentOS-7-x86_64-DVD-2009.iso）
mkdir -p /mnt/cdrom
mount -o loop /root/CentOS-7-x86_64-DVD-2009.iso /mnt/cdrom
# 2. 写 repo 文件
cat > /etc/yum.repos.d/local-iso.repo << 'EOF'
[local-iso-base]
name=Local ISO - CentOS 7 Base
baseurl=file:///mnt/cdrom
enabled=1
gpgcheck=0
EOF
# 3. 禁用其他仓库，防止干扰
yum --disablerepo="*" --enablerepo="local-iso-base" install 你想要的包
# 4. 用完卸载
umount /mnt/cdrom设置开机自动挂载 ISO：
bash
echo "/root/CentOS-7-x86_64-DVD-2009.iso /mnt/cdrom iso9660 loop,defaults 0 0" >> /etc/fstabISO 方案就像"带上泡面去无人区"------虽然种类少（只有 Base 仓库），但能保命。EPEL 什么的就别想了，除非你把 EPEL 也同步下来。
完整离线仓库架构总图
#mermaid-svg-ODVOSfHXibDFWgRp{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-ODVOSfHXibDFWgRp .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-ODVOSfHXibDFWgRp .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-ODVOSfHXibDFWgRp .error-icon{fill:#552222;}#mermaid-svg-ODVOSfHXibDFWgRp .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-ODVOSfHXibDFWgRp .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-ODVOSfHXibDFWgRp .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-ODVOSfHXibDFWgRp .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-ODVOSfHXibDFWgRp .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-ODVOSfHXibDFWgRp .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-ODVOSfHXibDFWgRp .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-ODVOSfHXibDFWgRp .marker{fill:#333333;stroke:#333333;}#mermaid-svg-ODVOSfHXibDFWgRp .marker.cross{stroke:#333333;}#mermaid-svg-ODVOSfHXibDFWgRp svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-ODVOSfHXibDFWgRp p{margin:0;}#mermaid-svg-ODVOSfHXibDFWgRp .label{font-family:"trebuchet ms",verdana,arial,sans-serif;color:#333;}#mermaid-svg-ODVOSfHXibDFWgRp .cluster-label text{fill:#333;}#mermaid-svg-ODVOSfHXibDFWgRp .cluster-label span{color:#333;}#mermaid-svg-ODVOSfHXibDFWgRp .cluster-label span p{background-color:transparent;}#mermaid-svg-ODVOSfHXibDFWgRp .label text,#mermaid-svg-ODVOSfHXibDFWgRp span{fill:#333;color:#333;}#mermaid-svg-ODVOSfHXibDFWgRp .node rect,#mermaid-svg-ODVOSfHXibDFWgRp .node circle,#mermaid-svg-ODVOSfHXibDFWgRp .node ellipse,#mermaid-svg-ODVOSfHXibDFWgRp .node polygon,#mermaid-svg-ODVOSfHXibDFWgRp .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-ODVOSfHXibDFWgRp .rough-node .label text,#mermaid-svg-ODVOSfHXibDFWgRp .node .label text,#mermaid-svg-ODVOSfHXibDFWgRp .image-shape .label,#mermaid-svg-ODVOSfHXibDFWgRp .icon-shape .label{text-anchor:middle;}#mermaid-svg-ODVOSfHXibDFWgRp .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-ODVOSfHXibDFWgRp .rough-node .label,#mermaid-svg-ODVOSfHXibDFWgRp .node .label,#mermaid-svg-ODVOSfHXibDFWgRp .image-shape .label,#mermaid-svg-ODVOSfHXibDFWgRp .icon-shape .label{text-align:center;}#mermaid-svg-ODVOSfHXibDFWgRp .node.clickable{cursor:pointer;}#mermaid-svg-ODVOSfHXibDFWgRp .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-ODVOSfHXibDFWgRp .arrowheadPath{fill:#333333;}#mermaid-svg-ODVOSfHXibDFWgRp .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-ODVOSfHXibDFWgRp .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-ODVOSfHXibDFWgRp .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-ODVOSfHXibDFWgRp .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-ODVOSfHXibDFWgRp .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-ODVOSfHXibDFWgRp .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-ODVOSfHXibDFWgRp .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-ODVOSfHXibDFWgRp .cluster text{fill:#333;}#mermaid-svg-ODVOSfHXibDFWgRp .cluster span{color:#333;}#mermaid-svg-ODVOSfHXibDFWgRp div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-ODVOSfHXibDFWgRp .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-ODVOSfHXibDFWgRp rect.text{fill:none;stroke-width:0;}#mermaid-svg-ODVOSfHXibDFWgRp .icon-shape,#mermaid-svg-ODVOSfHXibDFWgRp .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-ODVOSfHXibDFWgRp .icon-shape p,#mermaid-svg-ODVOSfHXibDFWgRp .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-ODVOSfHXibDFWgRp .icon-shape .label rect,#mermaid-svg-ODVOSfHXibDFWgRp .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-ODVOSfHXibDFWgRp .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-ODVOSfHXibDFWgRp .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-ODVOSfHXibDFWgRp :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} 内网环境
外网中转机
分发方式
rsync
物理拷贝
yum/dnf install
yum/dnf install
yum/dnf install
☁️ 互联网镜像站
mirrors.163.com
rsync 同步
createrepo 建索引
数据存储
/data/repo/
U盘/硬盘拷贝
（物理摆渡）
HTTP 服务器
nginx / httpd
🎯 推荐：局域网批量分发
本地目录
file:// 直接读
📌 适合单机
FTP 服务器
vsftpd
📌 有些老系统喜欢
🐔 内网客户端机器群
192.168.1.0/24
离线仓库的精髓就一句话："仓库的本质就是一堆 RPM 文件 + 一个目录索引"。 你只要把 RPM 文件拷过去，再用
createrepo生成索引，Yum/DNF 就会认它。至于用 HTTP、FTP 还是本地目录，只是"配送方式"不同罢了。
十二、总结
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path,#mermaid-svg-LxsDazQK4DO5HZsM .section-root circle,#mermaid-svg-LxsDazQK4DO5HZsM .section-root polygon{fill:hsl(240, 100%, 46.2745098039%);}#mermaid-svg-LxsDazQK4DO5HZsM .section-root text{fill:#ffffff;}#mermaid-svg-LxsDazQK4DO5HZsM .section-root span{color:#ffffff;}#mermaid-svg-LxsDazQK4DO5HZsM .section-2 span{color:#ffffff;}#mermaid-svg-LxsDazQK4DO5HZsM .icon-container{height:100%;display:flex;justify-content:center;align-items:center;}#mermaid-svg-LxsDazQK4DO5HZsM .edge{fill:none;}#mermaid-svg-LxsDazQK4DO5HZsM .mindmap-node-label{dy:1em;alignment-baseline:middle;text-anchor:middle;dominant-baseline:middle;text-align:center;}#mermaid-svg-LxsDazQK4DO5HZsM :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;} Linux 包管理
Debian/Ubuntu 系
dpkg
apt / apt-get
Red Hat/Fedora 系
RPM 底层
上层包管理器
Yum 已退役
Python 2
依赖解析慢
成为历史
DNF 新一代
libsolv SAT求解
SQLite 缓存
增量更新
模块化支持
事务回滚
SUSE 系
zypper
Arch 系
pacman
Yum 陪伴了无数运维人的青春，它是那个时代最好的解决方案。而 DNF 接过了接力棒，带着更强的引擎、更优雅的设计继续前进。
如果你还在用 Yum，是时候说一声：
"谢谢你，Yum。接下来，交给 DNF 吧。" 🫡
------ 一个曾经在凌晨三点被 Yum 依赖地狱折磨过的运维人，含泪写于某个终于不用加班的日子