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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<!--[if IE]><meta http-equiv="X-UA-Compatible" content="IE=edge"><![endif]-->
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="generator" content="Asciidoctor 1.5.8">
<meta name="description" content="Janus网关是一个高性能的网关，基于Netty研发.">
<meta name="keywords" content="Janus，Netty">
<title>Janus Reference Documentation</title>
<link rel="stylesheet" href="styles/halo.css">
<link rel="stylesheet" href="styles/coderay-asciidoctor.css">
</head>
<body class="book toc2 toc-left">
<div id="header">
<h1>Janus Reference Documentation</h1>
<div class="details">
<span id="revnumber">version: 1.0.0.REALESE</span>
<br><span id="revremark">Copyright (c) 2019-2044 xujin (http://xujin.org)</span>
</div>
<div id="toc" class="toc2">
<div id="toctitle">目录</div>
<ul class="sectlevel1">
<li><a href="#preface">I. 前言</a></li>
<li><a href="#release_notes">Release Note</a></li>
<li><a href="#Halo-introduction">II. Janus 概述</a>
<ul class="sectlevel1">
<li><a href="#_janus网关介绍">1. Janus网关介绍</a></li>
<li><a href="#_janus_基本功能和定位">2. Janus 基本功能和定位</a></li>
<li><a href="#_janus_项目">3. Janus 项目</a>
<ul class="sectlevel2">
<li><a href="#_janus_team">3.1. Janus Team</a></li>
<li><a href="#_janus工程">3.2. Janus工程</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#janus-design">III. janus设计</a>
<ul class="sectlevel1">
<li><a href="#_janus_filter设计">4. janus filter设计</a>
<ul class="sectlevel2">
<li><a href="#_filter设计">4.1. Filter设计</a></li>
<li><a href="#_filter执行流程">4.2. filter执行流程</a></li>
<li><a href="#_invoke_filter设计">4.3. Invoke Filter设计</a></li>
</ul>
</li>
<li><a href="#_janus_路由设计">5. Janus 路由设计</a>
<ul class="sectlevel2">
<li><a href="#_路由模型设计">5.1. 路由模型设计</a></li>
<li><a href="#_示例路由配置">5.2. 示例路由配置</a></li>
</ul>
</li>
<li><a href="#_janus_predicates断言设计">6. Janus Predicates(断言设计)</a>
<ul class="sectlevel2">
<li><a href="#_断言设计">6.1. 断言设计</a></li>
<li><a href="#_精准匹配">6.2. 精准匹配</a></li>
<li><a href="#_模糊匹配">6.3. 模糊匹配</a></li>
</ul>
</li>
<li><a href="#_janus_netty中的设计">7. Janus Netty中的设计</a>
<ul class="sectlevel2">
<li><a href="#_janus_server的设计">7.1. Janus Server的设计</a>
<ul class="sectlevel4">
<li><a href="#_网关接受请求的netty_server">7.1.1. 网关接受请求的Netty Server</a></li>
<li><a href="#_网关转发调用内部源服务的client">7.1.2. 网关转发调用内部源服务的Client</a></li>
<li><a href="#_网关转发调用源服务的连接池">7.1.3. 网关转发调用源服务的连接池</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#_rpc数据传输">8. RPC数据传输</a></li>
<li><a href="#_http数据处理">9. http数据处理</a></li>
<li><a href="#_janus监控告警系统设计">10. Janus监控告警系统设计</a>
<ul class="sectlevel2">
<li><a href="#_背景">10.1. 背景</a></li>
<li><a href="#_应用场景">10.2. 应用场景</a></li>
</ul>
</li>
<li><a href="#_waf2_0">11. WAF2.0</a></li>
<li><a href="#_janus限流方案设计">12. Janus限流方案设计</a>
<ul class="sectlevel2">
<li><a href="#_需求">12.1. 需求</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#janus-Admin-design">IV. janus Admin设计</a>
<ul class="sectlevel1">
<li><a href="#_数据库设计">13. 数据库设计</a>
<ul class="sectlevel2">
<li><a href="#_db表结构设计">13.1. DB表结构设计</a></li>
<li><a href="#_api的模型设计">13.2. API的模型设计</a></li>
</ul>
</li>
<li><a href="#_janus_admin使用">14. Janus Admin使用</a>
<ul class="sectlevel2">
<li><a href="#_api管理">14.1. API管理</a>
<ul class="sectlevel3">
<li><a href="#_新建api">14.1.1. 新建API</a></li>
</ul>
</li>
</ul>
</li>
<li><a href="#_开发者手册">15. 开发者手册</a>
<ul class="sectlevel2">
<li><a href="#_启动janus_server">15.1. 启动Janus Server</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="preface"><a class="anchor" href="#preface"></a><a class="link" href="#preface">I. 前言</a></h2>
<div class="sectionbody">
<div class="openblock">
<div class="content">
<div class="paragraph">
<p>本文档是Janus Reference Documentation</p>
</div>
<div class="paragraph">
<p>总之,Janus是一个基于Netty自主研发的高性能网关</p>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="release_notes"><a class="anchor" href="#release_notes"></a><a class="link" href="#release_notes">Release Note</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>关于Janus的Release Note可以访问<a href="#Janus-Release-Note">[Janus-Release-Note]</a></p>
</div>
</div>
</div>
<h1 id="Halo-introduction" class="sect0"><a class="anchor" href="#Halo-introduction"></a><a class="link" href="#Halo-introduction">II. Janus 概述</a></h1>
<div class="sect1">
<h2 id="_janus网关介绍"><a class="anchor" href="#_janus网关介绍"></a><a class="link" href="#_janus网关介绍">1. Janus网关介绍</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>Janus（汉译作“杰纳斯”或“雅努斯”）是天门神,早晨打开天门，让阳光普照人间，晚上又把天门关上，使黑暗降临大地。他的头部前后各有一副面孔，同时看着两个不同方向，一副看着过去，一副看着未来，因此也称两面神</p>
</div>
<div class="paragraph">
<p>Janus掌握所有对外接口的进出.</p>
</div>
<div class="paragraph">
<p>服务网关Janus是Halo体系的一个组成模块，为各业务开发部门开发的业务服务（RESTful、RPC）提供对外统一的，高性能的HTTP网关。<br>
Janus致力于优化API入口的七层协议接入，主要从下面几个方面进行优化：<br></p>
</div>
<div class="ulist">
<ul>
<li>
<p>协议支持：外网HTTPS、HTTP2、HTTP、自定义协议等，自动适配到内网RPC协议和HTTP协议。</p>
</li>
<li>
<p>接入优化：SSL session复用、SSL 加解密异步化、异地多活、流量管控</p>
</li>
<li>
<p>安全： 认证验签、验签加固、设备指纹、WAF、防刷、限流、风控</p>
</li>
<li>
<p>其他： 单元化、轻量数据聚合、A/B test, mock api, 多租户等</p>
</li>
</ul>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_janus_基本功能和定位"><a class="anchor" href="#_janus_基本功能和定位"></a><a class="link" href="#_janus_基本功能和定位">2. Janus 基本功能和定位</a></h2>
<div class="sectionbody">
</div>
</div>
<div class="sect1">
<h2 id="_janus_项目"><a class="anchor" href="#_janus_项目"></a><a class="link" href="#_janus_项目">3. Janus 项目</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_janus_team"><a class="anchor" href="#_janus_team"></a><a class="link" href="#_janus_team">3.1. Janus Team</a></h3>
<div class="paragraph">
<p>Janus Team开发团队信息如下，感谢所有对Janus有贡献的所有人！</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 25%;">
<col style="width: 25%;">
<col style="width: 25%;">
<col style="width: 25%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">github id</th>
<th class="tableblock halign-left valign-top">角色</th>
<th class="tableblock halign-left valign-top">github地址</th>
<th class="tableblock halign-left valign-top">备注</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">SoftwareKing</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">PPMC</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/SoftwareKing" class="bare">https://github.com/SoftwareKing</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">wolfgump</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">PPMC</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/wolfgump" class="bare">https://github.com/wolfgump</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">tbkk</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">PPMC</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/tbkk" class="bare">https://github.com/tbkk</a></p></td>
<td class="tableblock halign-left valign-top"></td>
</tr>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="_janus工程"><a class="anchor" href="#_janus工程"></a><a class="link" href="#_janus工程">3.2. Janus工程</a></h3>
<div class="paragraph">
<p>Janus工程主要为3个项目，如下所示:</p>
</div>
<table class="tableblock frame-all grid-all stretch">
<colgroup>
<col style="width: 33.3333%;">
<col style="width: 33.3333%;">
<col style="width: 33.3334%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">工程名</th>
<th class="tableblock halign-left valign-top">说明</th>
<th class="tableblock halign-left valign-top">github地址</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">janus</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">janus网关Server</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/JanusTeam/Janus" class="bare">https://github.com/JanusTeam/Janus</a></p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">janus-ui</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">janus管控平台前端</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><a href="https://github.com/JanusTeam/janus-ui" class="bare">https://github.com/JanusTeam/janus-ui</a></p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">janus-admin</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Janus网关的管控平台后端</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">暂无</p></td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<h1 id="janus-design" class="sect0"><a class="anchor" href="#janus-design"></a><a class="link" href="#janus-design">III. janus设计</a></h1>
<div class="sect1">
<h2 id="_janus_filter设计"><a class="anchor" href="#_janus_filter设计"></a><a class="link" href="#_janus_filter设计">4. janus filter设计</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_filter设计"><a class="anchor" href="#_filter设计"></a><a class="link" href="#_filter设计">4.1. Filter设计</a></h3>
<div class="paragraph">
<p>责任链模式是实现了类似「流水线」结构的逐级处理，通常是一条链式结构，将「抽象处理者」的不同实现串联起来：
如果当前节点能够处理任务则直接处理掉，如果无法处理则委托给责任链的下一个节点，如此往复直到有节点可以处理这个任务。</p>
</div>
<div class="paragraph">
<p>Filter链的设计正式采用了这种责任链的设计方式</p>
</div>
</div>
<div class="sect2">
<h3 id="_filter执行流程"><a class="anchor" href="#_filter执行流程"></a><a class="link" href="#_filter执行流程">4.2. filter执行流程</a></h3>
</div>
<div class="sect2">
<h3 id="_invoke_filter设计"><a class="anchor" href="#_invoke_filter设计"></a><a class="link" href="#_invoke_filter设计">4.3. Invoke Filter设计</a></h3>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_janus_路由设计"><a class="anchor" href="#_janus_路由设计"></a><a class="link" href="#_janus_路由设计">5. Janus 路由设计</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_路由模型设计"><a class="anchor" href="#_路由模型设计"></a><a class="link" href="#_路由模型设计">5.1. 路由模型设计</a></h3>
</div>
<div class="sect2">
<h3 id="_示例路由配置"><a class="anchor" href="#_示例路由配置"></a><a class="link" href="#_示例路由配置">5.2. 示例路由配置</a></h3>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="yml"><span class="key">routes</span>:
- <span class="string"><span class="content">id: 1</span></span> <span class="comment">#演示Spring Cloud应用模糊匹配并走LB # http://localhost:8081/janus-admin/admin/menu/manage/allMenu</span>
<span class="key">filters</span>:
- <span class="string"><span class="content">name: StripPrefix</span></span> <span class="comment">#去前缀</span>
<span class="key">args</span>:
<span class="key">parts</span>: <span class="string"><span class="content">1</span></span>
- <span class="string"><span class="content">name: AddRequestHeader</span></span> <span class="comment">#添加Header</span>
<span class="key">args</span>:
<span class="key">X-Request-Blue</span>: <span class="string"><span class="content">Blue</span></span>
<span class="key">X-Request-Red</span>: <span class="string"><span class="content">red</span></span>
<span class="key">protocol</span>: <span class="string"><span class="content">lb://sc</span></span>
<span class="key">serviceName</span>: <span class="string"><span class="content">janus-admin</span></span>
<span class="key">loadBalancerName</span>: <span class="string"><span class="content">round-robin</span></span> <span class="comment">#random、hash; default is round-robin</span>
<span class="key">predicates</span>: <span class="comment"># and ; if need or add a new route</span>
- <span class="string"><span class="content">name: PathRegex</span></span>
<span class="key">args</span>:
<span class="key">pattern</span>: <span class="string"><span class="content">^/janus-admin/.*</span></span>
- <span class="string"><span class="content">id: 2</span></span> <span class="comment">#演示 URL1->URL2 并走LB #http://localhost:8081/api/getAllMenu</span>
<span class="key">protocol</span>: <span class="string"><span class="content">lb://sc</span></span>
<span class="key">serviceName</span>: <span class="string"><span class="content">janus-admin</span></span>
<span class="key">filters</span>:
- <span class="string"><span class="content">name: PathMapping</span></span>
<span class="key">args</span>:
<span class="key">/api/getAllMenu</span>: <span class="string"><span class="delimiter">"</span><span class="content">/admin/menu/manage/allMenu</span><span class="delimiter">"</span></span>
<span class="key">predicates</span>: <span class="comment"># and ; if need or add a new route</span>
- <span class="string"><span class="content">name: PathPrecise</span></span>
<span class="key">args</span>:
<span class="key">pattern</span>: <span class="string"><span class="content">/api/getAllMenu</span></span>
- <span class="string"><span class="content">id: 3</span></span> <span class="comment">#用于演示精准匹配,不走LB http://localhost:8081/admin/menu/manage/allMenu</span>
<span class="key">protocol</span>: <span class="string"><span class="content">http</span></span>
<span class="key">hosts</span>:
- <span class="string"><span class="content">127.0.0.1:8084</span></span>
<span class="key">predicates</span>: <span class="comment"># and ; if need or add a new route</span>
- <span class="string"><span class="content">name: PathPrecise</span></span>
<span class="key">args</span>:
<span class="key">paths</span>: <span class="string"><span class="content">/admin/menu/manage/allMenu</span></span>
- <span class="string"><span class="content">id: 4</span></span> <span class="comment">#用于模糊匹配,不走LB</span>
<span class="key">protocol</span>: <span class="string"><span class="content">http</span></span>
<span class="key">hosts</span>:
- <span class="string"><span class="content">127.0.0.1:8084</span></span>
<span class="key">predicates</span>: <span class="comment"># and ; if need or add a new route</span>
- <span class="string"><span class="content">name: PathRegex</span></span>
<span class="key">args</span>:
<span class="key">pattern</span>: <span class="string"><span class="content">^/janus-admin-test/.*</span></span>
- <span class="string"><span class="content">id: 5</span></span> <span class="comment">#用于演示精准匹配,不走LB http://localhost:8081/admin1/menu/manage/allMenu3</span>
<span class="key">filters</span>:
- <span class="string"><span class="content">name: MockResponse</span></span>
<span class="key">args</span>:
<span class="key">/admin1/menu/manage/allMenu3</span>: <span class="string"><span class="delimiter">"</span><span class="content">hello word!</span><span class="delimiter">"</span></span>
<span class="key">protocol</span>: <span class="string"><span class="content">http</span></span>
<span class="key">hosts</span>:
- <span class="string"><span class="content">127.0.0.1:8084</span></span>
<span class="key">predicates</span>: <span class="comment"># and ; if need or add a new route</span>
- <span class="string"><span class="content">name: PathPrecise</span></span>
<span class="key">args</span>:
<span class="key">paths</span>: <span class="string"><span class="content">/admin1/menu/manage/allMenu3</span></span>
- <span class="string"><span class="content">id: 6</span></span> <span class="comment">#用于演示精准匹配,不走LB,直接转发到指定的IP和端口 http://localhost:8081/admin2/menu/manage/allMenu2</span>
<span class="key">filters</span>:
- <span class="string"><span class="content">name: PathMapping</span></span>
<span class="key">args</span>:
<span class="key">/admin2/menu/manage/allMenu2</span>: <span class="string"><span class="delimiter">"</span><span class="content">/admin/menu/manage/allMenu</span><span class="delimiter">"</span></span>
<span class="key">protocol</span>: <span class="string"><span class="content">http</span></span>
<span class="key">hosts</span>:
- <span class="string"><span class="content">127.0.0.1:8084</span></span>
<span class="key">predicates</span>: <span class="comment"># and ; if need or add a new route</span>
- <span class="string"><span class="content">name: PathPrecise</span></span>
<span class="key">args</span>:
<span class="key">paths</span>: <span class="string"><span class="content">/admin2/menu/manage/allMenu2</span></span>
- <span class="string"><span class="content">id: 7</span></span> <span class="comment">#根据配置的多个Hosts不通过注册中心进行LB #http://localhost:8081/admin7/menu/manage/allMenu2</span>
<span class="key">filters</span>:
- <span class="string"><span class="content">name: PathMapping</span></span>
<span class="key">args</span>:
<span class="key">/admin7/menu/manage/allMenu2</span>: <span class="string"><span class="delimiter">"</span><span class="content">/admin/menu/manage/allMenu</span><span class="delimiter">"</span></span>
<span class="key">protocol</span>: <span class="string"><span class="content">lb://hosts</span></span>
<span class="key">hosts</span>:
- <span class="string"><span class="content">127.0.0.1:8084</span></span>
- <span class="string"><span class="content">admin.qingcloud.net:80</span></span>
<span class="key">predicates</span>: <span class="comment"># and ; if need or add a new route</span>
- <span class="string"><span class="content">name: PathPrecise</span></span>
<span class="key">args</span>:
<span class="key">paths</span>: <span class="string"><span class="content">/admin7/menu/manage/allMenu2</span></span></code></pre>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_janus_predicates断言设计"><a class="anchor" href="#_janus_predicates断言设计"></a><a class="link" href="#_janus_predicates断言设计">6. Janus Predicates(断言设计)</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_断言设计"><a class="anchor" href="#_断言设计"></a><a class="link" href="#_断言设计">6.1. 断言设计</a></h3>
</div>
<div class="sect2">
<h3 id="_精准匹配"><a class="anchor" href="#_精准匹配"></a><a class="link" href="#_精准匹配">6.2. 精准匹配</a></h3>
</div>
<div class="sect2">
<h3 id="_模糊匹配"><a class="anchor" href="#_模糊匹配"></a><a class="link" href="#_模糊匹配">6.3. 模糊匹配</a></h3>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_janus_netty中的设计"><a class="anchor" href="#_janus_netty中的设计"></a><a class="link" href="#_janus_netty中的设计">7. Janus Netty中的设计</a></h2>
<div class="sectionbody">
<div class="paragraph">
<p>org.xujin.janus.core.netty.client.NettyConnectClient</p>
</div>
<div class="paragraph">
<p>org.xujin.janus.core.netty.server.NettyServer-→NettyServerHandler</p>
</div>
<div class="sect2">
<h3 id="_janus_server的设计"><a class="anchor" href="#_janus_server的设计"></a><a class="link" href="#_janus_server的设计">7.1. Janus Server的设计</a></h3>
<div class="sect4">
<h5 id="_网关接受请求的netty_server"><a class="anchor" href="#_网关接受请求的netty_server"></a><a class="link" href="#_网关接受请求的netty_server">7.1.1. 网关接受请求的Netty Server</a></h5>
<div class="paragraph">
<p>org.xujin.janus.core.netty.NettyServer.java</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="java"><span class="comment">/**
* 初始化EventPool 参数
*/</span>
<span class="directive">private</span> <span class="type">void</span> initEventPool() {
bossGroup = <span class="keyword">new</span> NioEventLoopGroup(serverConfig.getBossThread(), <span class="keyword">new</span> <span class="predefined-type">ThreadFactory</span>() {
<span class="directive">private</span> <span class="predefined-type">AtomicInteger</span> index = <span class="keyword">new</span> <span class="predefined-type">AtomicInteger</span>(<span class="integer">0</span>);
<span class="annotation">@Override</span>
<span class="directive">public</span> <span class="predefined-type">Thread</span> newThread(<span class="predefined-type">Runnable</span> r) {
<span class="keyword">return</span> <span class="keyword">new</span> <span class="predefined-type">Thread</span>(r, <span class="string"><span class="delimiter">"</span><span class="content">Janus_Boss_</span><span class="delimiter">"</span></span> + index.incrementAndGet());
}
});
workGroup = <span class="keyword">new</span> NioEventLoopGroup(serverConfig.getWorkThread(), <span class="keyword">new</span> <span class="predefined-type">ThreadFactory</span>() {
<span class="directive">private</span> <span class="predefined-type">AtomicInteger</span> index = <span class="keyword">new</span> <span class="predefined-type">AtomicInteger</span>(<span class="integer">0</span>);
<span class="annotation">@Override</span>
<span class="directive">public</span> <span class="predefined-type">Thread</span> newThread(<span class="predefined-type">Runnable</span> r) {
<span class="keyword">return</span> <span class="keyword">new</span> <span class="predefined-type">Thread</span>(r, <span class="string"><span class="delimiter">"</span><span class="content">Janus_Work_</span><span class="delimiter">"</span></span> + index.incrementAndGet());
}
});
}
<span class="comment">/**
* 服务开启
*/</span>
<span class="directive">public</span> <span class="type">void</span> start(<span class="type">int</span> port) {
<span class="comment">//TODO 上生产时去掉</span>
ResourceLeakDetector.setLevel(ResourceLeakDetector.Level.ADVANCED);
initEventPool();
ServerBootstrap bootstrap = <span class="keyword">new</span> ServerBootstrap();
<span class="comment">//绑定线程池</span>
bootstrap.group(bossGroup, workGroup)
.channel(NioServerSocketChannel.class) <span class="comment">//指定使用的channel</span>
.option(ChannelOption.SO_REUSEADDR, serverConfig.isReUseAddr())
.option(ChannelOption.SO_BACKLOG, serverConfig.getBackLog())
.childOption(ChannelOption.SO_RCVBUF, serverConfig.getRevBuf())
.childOption(ChannelOption.SO_SNDBUF, serverConfig.getSndBuf())
.childOption(ChannelOption.TCP_NODELAY, serverConfig.isTcpNoDelay())
.childOption(ChannelOption.SO_KEEPALIVE, serverConfig.isKeepalive())
.childHandler(initChildHandler());
bootstrap.bind(port).addListener((ChannelFutureListener) channelFuture -> {
<span class="keyword">if</span> (channelFuture.isSuccess()) {
changeOnLine(<span class="predefined-constant">true</span>);
log.info(<span class="string"><span class="delimiter">"</span><span class="content">服务端启动成功【</span><span class="delimiter">"</span></span> + IpUtils.getHost() + <span class="string"><span class="delimiter">"</span><span class="content">:</span><span class="delimiter">"</span></span> + port + <span class="string"><span class="delimiter">"</span><span class="content">】</span><span class="delimiter">"</span></span>);
} <span class="keyword">else</span> {
log.error(<span class="string"><span class="delimiter">"</span><span class="content">服务端启动失败【</span><span class="delimiter">"</span></span> + IpUtils.getHost() + <span class="string"><span class="delimiter">"</span><span class="content">:</span><span class="delimiter">"</span></span> + port + <span class="string"><span class="delimiter">"</span><span class="content">】,cause:</span><span class="delimiter">"</span></span>
+ channelFuture.cause().getMessage());
shutdown(port);
}
});
}</code></pre>
</div>
</div>
<div class="ulist">
<ul>
<li>
<p>Netty的Server端，不管是Netty Server端和Client端都有NioEventLoopGroup</p>
</li>
<li>
<p>因为是Netty Server端,所以Channel类型是NioServerSocketChannel.</p>
</li>
<li>
<p>childHandler(initChildHandler())是基于Pipeline的自定义Handler机制。</p>
</li>
<li>
<p>EventLoopGroup：无论是服务端还是客户端，都必须指定EventLoopGroup。
在上面的代码中，
指定了NioEventLoopGroup，表示一个NIO的EventLoopGroup，不过服务端需要指定两个EventLoopGroup，一个是bossGroup，
用于处理客户端的连接请求；另一个是workerGroup，用于处理与各个客户端连接的I/O操作。</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>（2）指定Channel的类型。这里是服务端，所以使用了NioServerSocketChannel。</p>
</div>
<div class="paragraph">
<p>（3）配置自定义的业务处理器Handler。</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="java"><span class="annotation">@SuppressWarnings</span>(<span class="string"><span class="delimiter">"</span><span class="content">rawtypes</span><span class="delimiter">"</span></span>)
<span class="directive">private</span> ChannelInitializer initChildHandler() {
<span class="keyword">return</span> <span class="keyword">new</span> ChannelInitializer<<span class="predefined-type">SocketChannel</span>>() {
<span class="directive">final</span> <span class="predefined-type">ThreadPoolExecutor</span> serverHandlerPool = ThreadPoolUtils.makeServerThreadPool(NettyServer.class.getSimpleName());
<span class="comment">//网关Server的Http请求入口Handler</span>
<span class="directive">final</span> NettyServerHandler nettyServerHandler = <span class="keyword">new</span> NettyServerHandler(serverHandlerPool);
<span class="annotation">@Override</span>
<span class="directive">protected</span> <span class="type">void</span> initChannel(<span class="predefined-type">SocketChannel</span> ch) <span class="directive">throws</span> <span class="exception">Exception</span> {
<span class="comment">//initHandler(ch.pipeline(), serverConfig);</span>
ch.pipeline().addLast(<span class="keyword">new</span> IdleStateHandler(<span class="integer">180</span>, <span class="integer">0</span>, <span class="integer">0</span>));
ch.pipeline().addLast(<span class="string"><span class="delimiter">"</span><span class="content">logging</span><span class="delimiter">"</span></span>, <span class="keyword">new</span> LoggingHandler(LogLevel.DEBUG));
<span class="comment">// We want to allow longer request lines, headers, and chunks</span>
<span class="comment">// respectively.</span>
ch.pipeline().addLast(<span class="string"><span class="delimiter">"</span><span class="content">decoder</span><span class="delimiter">"</span></span>, <span class="keyword">new</span> HttpRequestDecoder(
serverConfig.getMaxInitialLineLength(),
serverConfig.getMaxHeaderSize(),
serverConfig.getMaxChunkSize()));
<span class="comment">//ch.pipeline().addLast("inflater", new HttpContentDecompressor());</span>
ch.pipeline().addLast(<span class="string"><span class="delimiter">"</span><span class="content">aggregator</span><span class="delimiter">"</span></span>, <span class="keyword">new</span> HttpObjectAggregator(serverConfig.getMaxHttpLength()));
<span class="comment">//响应解码器</span>
ch.pipeline().addLast(<span class="string"><span class="delimiter">"</span><span class="content">http-encoder</span><span class="delimiter">"</span></span>, <span class="keyword">new</span> HttpResponseEncoder());
<span class="comment">//目的是支持异步大文件传输（）</span>
ch.pipeline().addLast(<span class="string"><span class="delimiter">"</span><span class="content">http-chunked</span><span class="delimiter">"</span></span>, <span class="keyword">new</span> ChunkedWriteHandler());
<span class="comment">//网关Server的Netty HTTP连接处理类</span>
ch.pipeline().addLast(<span class="string"><span class="delimiter">"</span><span class="content">process</span><span class="delimiter">"</span></span>, nettyServerHandler);
}
};
}</code></pre>
</div>
</div>
</div>
<div class="sect4">
<h5 id="_网关转发调用内部源服务的client"><a class="anchor" href="#_网关转发调用内部源服务的client"></a><a class="link" href="#_网关转发调用内部源服务的client">7.1.2. 网关转发调用内部源服务的Client</a></h5>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>网关内部转发的客户端Java类 org.xujin.janus.core.netty.client.NettyConnectClient.java</p>
</li>
</ol>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="java"><span class="annotation">@Slf4j</span>
<span class="directive">public</span> <span class="type">class</span> <span class="class">NettyConnectClient</span> <span class="directive">extends</span> ConnectClient {
<span class="directive">public</span> NioEventLoopGroup clientGroup = <span class="keyword">new</span> NioEventLoopGroup(<span class="integer">0</span>,
<span class="keyword">new</span> DefaultThreadFactory(<span class="string"><span class="delimiter">"</span><span class="content">Janus-client-Worker</span><span class="delimiter">"</span></span>, <span class="predefined-constant">true</span>));
<span class="directive">private</span> <span class="predefined-type">Channel</span> channel;
<span class="annotation">@Override</span>
<span class="directive">public</span> <span class="type">void</span> init(<span class="predefined-type">String</span> address) <span class="directive">throws</span> <span class="exception">Exception</span> {
<span class="predefined-type">Object</span><span class="type">[]</span> array = IpUtils.parseIpPort(address);
<span class="predefined-type">String</span> host = (<span class="predefined-type">String</span>) array[<span class="integer">0</span>];
<span class="type">int</span> port = (<span class="type">int</span>) array[<span class="integer">1</span>];
Bootstrap bootstrap = <span class="keyword">new</span> Bootstrap();
bootstrap.group(clientGroup)
.channel(NioSocketChannel.class)
.handler(<span class="keyword">new</span> ChannelInitializer<<span class="predefined-type">SocketChannel</span>>() {
<span class="annotation">@Override</span>
<span class="directive">public</span> <span class="type">void</span> initChannel(<span class="predefined-type">SocketChannel</span> channel) <span class="directive">throws</span> <span class="exception">Exception</span> {
channel.pipeline()
.addLast(<span class="keyword">new</span> IdleStateHandler(<span class="integer">0</span>, <span class="integer">0</span>, <span class="integer">60</span>, <span class="predefined-type">TimeUnit</span>.SECONDS))
<span class="comment">// .addLast(new HttpClientCodec())</span>
<span class="comment">// .addLast(new HttpObjectAggregator(65536))</span>
<span class="comment">//解压</span>
<span class="comment">//.addLast(new HttpContentDecompressor())</span>
.addLast(<span class="keyword">new</span> HttpClientCodec(NettyConstants.MAX_INITIAL_LINE_LENGTH,NettyConstants.MAX_HEADER_SIZE, NettyConstants.MAX_CHUNK_SIZE),
<span class="keyword">new</span> HttpObjectAggregator(NettyConstants.MAX_RESPONSE_SIZE))
<span class="comment">//Netty Client把请求转发给内网源服务的Handler</span>
.addLast(<span class="string"><span class="delimiter">"</span><span class="content">handler</span><span class="delimiter">"</span></span>, <span class="keyword">new</span> NettyClientHandler());
}
})
.option(ChannelOption.TCP_NODELAY, <span class="predefined-constant">true</span>)
.option(ChannelOption.SO_KEEPALIVE, <span class="predefined-constant">true</span>)
.option(ChannelOption.CONNECT_TIMEOUT_MILLIS, <span class="integer">60</span>*<span class="integer">1000</span>);
<span class="local-variable">this</span>.channel = bootstrap.connect(host, port).sync().channel();
<span class="comment">// valid</span>
<span class="keyword">if</span> (!isValidate()) {
close();
<span class="keyword">return</span>;
}
log.debug(<span class="string"><span class="delimiter">"</span><span class="content">netty client proxy, connect to server success at host:{}, port:{}</span><span class="delimiter">"</span></span>, host, port);
}
}</code></pre>
</div>
</div>
<div class="ulist">
<ul>
<li>
<p>Netty客户端必须有NioEventLoopGroup</p>
</li>
<li>
<p>ChannelType：指定Channel的类型。因为是客户端，所以使用了NioSocketChannel。</p>
</li>
<li>
<p>new NioEventLoopGroup()核心线程数是CPU*2，如果我们传入的线程数nThreads是0，那么Netty会设置默认的线程数DEFAULT_EVENT_LOOP_THREADS，而这个默认的</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Netty的客户端如何发起TCP长连接</p>
</div>
<div class="paragraph">
<p>bootstrap.connect(host, port).sync().channel()</p>
</div>
<div class="paragraph">
<p>客户端通过调用Bootstrap的connect()方法进行连接。在connect()方法中进行一些参数检查，并调用doConnect()方法，</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="java"><span class="directive">static</span> {
DEFAULT_EVENT_LOOP_THREADS = <span class="predefined-type">Math</span>.max(<span class="integer">1</span>, SystemPropertyUtil.getInt(
<span class="string"><span class="delimiter">"</span><span class="content">io.netty.eventLoopThreads</span><span class="delimiter">"</span></span>, NettyRuntime.availableProcessors() * <span class="integer">2</span>));
<span class="keyword">if</span> (logger.isDebugEnabled()) {
logger.debug(<span class="string"><span class="delimiter">"</span><span class="content">-Dio.netty.eventLoopThreads: {}</span><span class="delimiter">"</span></span>, DEFAULT_EVENT_LOOP_THREADS);
}
}
<span class="comment">/**
* @see MultithreadEventExecutorGroup#MultithreadEventExecutorGroup(int, ThreadFactory, Object...)
*/</span>
<span class="directive">protected</span> MultithreadEventLoopGroup(<span class="type">int</span> nThreads, <span class="predefined-type">ThreadFactory</span> threadFactory, <span class="predefined-type">Object</span>... args) {
<span class="local-variable">super</span>(nThreads == <span class="integer">0</span> ? DEFAULT_EVENT_LOOP_THREADS : nThreads, threadFactory, args);
}</code></pre>
</div>
</div>
</div>
<div class="sect4">
<h5 id="_网关转发调用源服务的连接池"><a class="anchor" href="#_网关转发调用源服务的连接池"></a><a class="link" href="#_网关转发调用源服务的连接池">7.1.3. 网关转发调用源服务的连接池</a></h5>
<div class="paragraph">
<p>网关Server内置的Netty客户端不是每次转发都立即创建一个连接,而是从连接池中获取一个连接。</p>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_rpc数据传输"><a class="anchor" href="#_rpc数据传输"></a><a class="link" href="#_rpc数据传输">8. RPC数据传输</a></h2>
<div class="sectionbody">
</div>
</div>
<div class="sect1">
<h2 id="_http数据处理"><a class="anchor" href="#_http数据处理"></a><a class="link" href="#_http数据处理">9. http数据处理</a></h2>
<div class="sectionbody">
</div>
</div>
<div class="sect1">
<h2 id="_janus监控告警系统设计"><a class="anchor" href="#_janus监控告警系统设计"></a><a class="link" href="#_janus监控告警系统设计">10. Janus监控告警系统设计</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_背景"><a class="anchor" href="#_背景"></a><a class="link" href="#_背景">10.1. 背景</a></h3>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>需要统一的流量统计、监控告警指标，以便对Janus系统性能、运行状态进行分析。</p>
</li>
<li>
<p>Janus网关需要对进来的业务流量进行监控、统计和实时告警，以让业务方了解他们的服务经过Janus的实时状态。</p>
</li>
<li>
<p>对Janus本身运行情况进行监控和告警，以便发现Janus系统的问题，对产品持续做改进。</p>
</li>
<li>
<p>通过监控告警，直接定位到相应的处理人员，提高故障处理效率。</p>
</li>
</ol>
</div>
</div>
<div class="sect2">
<h3 id="_应用场景"><a class="anchor" href="#_应用场景"></a><a class="link" href="#_应用场景">10.2. 应用场景</a></h3>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>业务方人员。了解服务调用统计信息、调用耗时、出错率、异常等信息，方便排查问题。</p>
</li>
<li>
<p>Janus开发人员。评估系统性能、流量负载情况，发现系统运行问题。</p>
</li>
<li>
<p>系统运维人员。了解Janus机器和进程运行状态，机器负载，以发现集群运行问题。</p>
</li>
</ol>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_waf2_0"><a class="anchor" href="#_waf2_0"></a><a class="link" href="#_waf2_0">11. WAF2.0</a></h2>
<div class="sectionbody">
</div>
</div>
<div class="sect1">
<h2 id="_janus限流方案设计"><a class="anchor" href="#_janus限流方案设计"></a><a class="link" href="#_janus限流方案设计">12. Janus限流方案设计</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_需求"><a class="anchor" href="#_需求"></a><a class="link" href="#_需求">12.1. 需求</a></h3>
<div class="olist arabic">
<ol class="arabic">
<li>
<p>保证Janus服务器在 瞬间 极限流量的冲击下，稳定提供服务。</p>
</li>
</ol>
</div>
</div>
</div>
</div>
<h1 id="janus-Admin-design" class="sect0"><a class="anchor" href="#janus-Admin-design"></a><a class="link" href="#janus-Admin-design">IV. janus Admin设计</a></h1>
<div class="sect1">
<h2 id="_数据库设计"><a class="anchor" href="#_数据库设计"></a><a class="link" href="#_数据库设计">13. 数据库设计</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_db表结构设计"><a class="anchor" href="#_db表结构设计"></a><a class="link" href="#_db表结构设计">13.1. DB表结构设计</a></h3>
</div>
<div class="sect2">
<h3 id="_api的模型设计"><a class="anchor" href="#_api的模型设计"></a><a class="link" href="#_api的模型设计">13.2. API的模型设计</a></h3>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="yml">- <span class="string"><span class="content">id: 7</span></span> <span class="comment">#根据配置的多个Hosts不通过注册中心进行LB #http://localhost:8081/admin7/menu/manage/allMenu2</span>
<span class="key">filters</span>:
- <span class="string"><span class="content">name: PathMapping</span></span>
<span class="key">args</span>:
<span class="key">/admin7/menu/manage/allMenu2</span>: <span class="string"><span class="delimiter">"</span><span class="content">/admin/menu/manage/allMenu</span><span class="delimiter">"</span></span>
<span class="key">protocol</span>: <span class="string"><span class="content">lb://hosts</span></span>
<span class="key">hosts</span>:
- <span class="string"><span class="content">127.0.0.1:8084</span></span>
- <span class="string"><span class="content">admin.qingcloud.net:80</span></span>
<span class="key">predicates</span>: <span class="comment"># and ; if need or add a new route</span>
- <span class="string"><span class="content">name: PathPrecise</span></span>
<span class="key">args</span>:
<span class="key">paths</span>: <span class="string"><span class="content">/admin7/menu/manage/allMenu2</span></span></code></pre>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_janus_admin使用"><a class="anchor" href="#_janus_admin使用"></a><a class="link" href="#_janus_admin使用">14. Janus Admin使用</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_api管理"><a class="anchor" href="#_api管理"></a><a class="link" href="#_api管理">14.1. API管理</a></h3>
<div class="sect3">
<h4 id="_新建api"><a class="anchor" href="#_新建api"></a><a class="link" href="#_新建api">14.1.1. 新建API</a></h4>
<div class="ulist">
<ul>
<li>
<p>新建路由进行负载均衡</p>
</li>
</ul>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="yml">- <span class="string"><span class="content">id: 7</span></span> <span class="comment">#根据配置的多个Hosts不通过注册中心进行LB #http://localhost:8081/admin7/menu/manage/allMenu2</span>
<span class="key">filters</span>:
- <span class="string"><span class="content">name: PathMapping</span></span>
<span class="key">args</span>:
<span class="key">/admin7/menu/manage/allMenu2</span>: <span class="string"><span class="delimiter">"</span><span class="content">/admin/menu/manage/allMenu</span><span class="delimiter">"</span></span>
<span class="key">protocol</span>: <span class="string"><span class="content">lb://hosts</span></span>
<span class="key">hosts</span>:
- <span class="string"><span class="content">127.0.0.1:8084</span></span>
- <span class="string"><span class="content">admin.qingcloud.net:80</span></span>
<span class="key">predicates</span>: <span class="comment"># and ; if need or add a new route</span>
- <span class="string"><span class="content">name: PathPrecise</span></span>
<span class="key">args</span>:
<span class="key">paths</span>: <span class="string"><span class="content">/admin7/menu/manage/allMenu2</span></span></code></pre>
</div>
</div>
<div class="paragraph">
<p>Janus Admin的UI操作</p>
</div>
<div class="imageblock">
<div class="content">
<img src="images/admin/api/lb-hosts-1.png" alt="lb hosts 1" width="100%">
</div>
</div>
<div class="imageblock">
<div class="content">
<img src="images/admin/api/lb-hosts-2.png" alt="lb hosts 2" width="100%">
</div>
</div>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_开发者手册"><a class="anchor" href="#_开发者手册"></a><a class="link" href="#_开发者手册">15. 开发者手册</a></h2>
<div class="sectionbody">
<div class="sect2">
<h3 id="_启动janus_server"><a class="anchor" href="#_启动janus_server"></a><a class="link" href="#_启动janus_server">15.1. 启动Janus Server</a></h3>
<div class="paragraph">
<p>在IDEA中运行JanusServerApplication.java,设置启动参数即可。
eg:-Dcluster=Janus_Test -Dlocal=true,如下图所示:</p>
</div>
<div class="imageblock">
<div class="content">
<img src="images/dev-guide/1.png" alt="1" width="100%">
</div>
</div>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
-Dcluster=Janus_Test是网关集群编码Janus_Test,
-Dlocal=true表示启动的时候读取本地配置文件,而不是远端配置文件
</td>
</tr>
</table>
</div>
</div>
</div>
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<div id="footer-text">
version: 1.0.0.REALESE<br>
Last updated 2020-08-02 12:35:57 UTC
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