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| <article class="page" itemscope itemtype="http://schema.org/CreativeWork"> |
| <meta itemprop="headline" content="mesher快速入门"> |
| <meta itemprop="description" content="介绍如何使用mesher快速改造微服务应用"> |
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| <meta itemprop="dateModified" content="August 08, 2019"> |
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| <header> |
| <h1 class="page__title" itemprop="headline">mesher快速入门 |
| </h1> |
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| </header> |
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| <section class="page__content" itemprop="text"> |
| <h1 id="安装运行环境">安装运行环境</h1> |
| |
| <ul> |
| <li> |
| <p>安装<strong>git</strong>,详情可参考<a href="https://git-scm.com/book/zh/v2/%E8%B5%B7%E6%AD%A5-%E5%AE%89%E8%A3%85-Git" target="_blank">git安装教程</a>。</p> |
| </li> |
| <li> |
| <p>安装<strong>golang 1.12.7</strong> ,详情可参考<a href="https://golang.google.cn/doc/install" target="_blank">Go安装教程</a>。</p> |
| </li> |
| <li> |
| <p>安装<strong>python 2.7</strong>,详情可参考<a href="https://wiki.python.org/moin/BeginnersGuide/Download" target="_blank">python安装教程</a>。</p> |
| </li> |
| <li> |
| <p>安装<strong>nodejs v10.16.2</strong>,详情可参考<a href="https://nodejs.org/en/download/" target="_blank">nodejs安装教程</a>。</p> |
| </li> |
| </ul> |
| |
| <h1 id="运行-service-center">运行 Service Center</h1> |
| |
| <p>在 <strong>ServiceComb</strong> 微服务框架中,<strong>Service Center</strong> 提供服务注册及服务发现功能,可直接使用 Docker 运行。</p> |
| |
| <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>docker pull servicecomb/service-center |
| docker run <span class="nt">-d</span> <span class="nt">-p</span> 30100:30100 servicecomb/service-center:latest |
| </code></pre></div></div> |
| |
| <p><em>您可以通过阅读<a href="/cn/users/setup-environment/#运行service-center">环境配置</a>获取在本地以二进制方式运行<strong>Service Center</strong>和<strong>front</strong>的方法。</em></p> |
| |
| <h1 id="使用mesher接入servicecomb微服务体系">使用mesher接入servicecomb微服务体系</h1> |
| |
| <h2 id="案例背景">案例背景</h2> |
| |
| <ul> |
| <li>本用例主要是帮助用户快速入门<strong>mesher sidecar模式</strong>;希望用户通过该例子,快速上手使用mesher服务,了解mesher的工作模式,并了解如何通过mesher的帮助改造已有的http服务,接入ServiceComb微服务体系,得到go-chassis微服务框架提供的负载均衡、流控、服务治理、调用链追踪等微服务能力。完整案例将提交至<a href="https://github.com/apache/servicecomb-mesher/tree/master/examples/quick_start">案例下载</a>.</li> |
| </ul> |
| |
| <h2 id="用例服务介绍">用例服务介绍</h2> |
| |
| <ul> |
| <li> |
| <p>如下图所示,用例中的服务部署在地址为192.168.88.64的机器上,用户在地址为192.168.88.78的机器上通过浏览器发起请求;</p> |
| </li> |
| <li> |
| <p>1、 <strong>httpserver_calculator</strong>:基于python语言实现的http体质指数服务,可替换为任何语言开发的http服务;</p> |
| </li> |
| <li> |
| <p>2、 <strong>httpserver_webapp</strong>:基于nodejs语言实现的web服务,用于在浏览器上展示可视化结果;</p> |
| </li> |
| <li> |
| <p>3、 <strong>mesher_webapp</strong>:通过sidecar模式为httpserver_webapp提供服务的mesher实例;</p> |
| </li> |
| <li> |
| <p>4、 <strong>mesher_calculator</strong>:通过sidecar模式为httpserver_calculator提供服务的mesher实例;</p> |
| </li> |
| <li> |
| <p>5、 <strong>servicecenter</strong>:服务中心,接收mesher服务的注册,提供服务发现、路由查询、服务监控功能;</p> |
| |
| <p><img src="/assets/images/mesher/mesher-deployment-simple.png" alt="mesher部署图" /></p> |
| </li> |
| </ul> |
| |
| <h2 id="流程详情">流程详情</h2> |
| |
| <ul> |
| <li> |
| <p>1、 浏览器[192.168.88.78]对 <strong>httpserver_webapp</strong> 服务发起http调用<a href=""></a><a href="http://192.168.88.64:4597/calculator/bmi">http://192.168.88.64:4597/calculator/bmi</a>;</p> |
| </li> |
| <li> |
| <p>2、 httpserver_webapp服务接收请求,并发起对地址<a href=""></a><a href="http://calculator/bmi">http://calculator/bmi</a>的http调用,因为设置了代理<a href=""></a><a href="http://127.0.0.1:30101">http://127.0.0.1:30101</a>,<strong>httpserver_webapp</strong> 发起的请求将被转发到 <strong>mesher_webapp</strong> 服务;</p> |
| </li> |
| <li> |
| <p>3、 <strong>mesher_webapp</strong> 根据请求的服务名(microservice.yaml配置的服务名<strong>calculator</strong>)从服务中心<strong>servicecenter</strong>获得该服务名的地址,转发到<strong>mesher_calculator</strong>;</p> |
| </li> |
| <li> |
| <p>4、 <strong>mesher_calculator</strong>服务根据设置好的specific地址,转发到自己绑定的体质指数<strong>calculator</strong>服务(<strong>httpserver_calculator</strong>)进行处理;</p> |
| </li> |
| <li> |
| <p>5、 <strong>httpserver_calculator</strong>会根据用户身高和体重进行计算,并返回自己的服务标识展示在界面上;流程图如下所示:</p> |
| |
| <p><img src="/assets/images/mesher/mesher-flowchart-simple.png" alt="mesher流程图" /></p> |
| </li> |
| </ul> |
| |
| <h2 id="环境搭建">环境搭建</h2> |
| |
| <ul> |
| <li> |
| <p>1、 编译 <strong>mesher</strong> :<a href="https://github.com/apache/servicecomb-mesher">下载地址</a>, 按README.md编译项目得到可执行文件mesher(linux),windows(mesher.exe);</p> |
| </li> |
| <li> |
| <p>2、 创建 <strong>mesher_webapp</strong> 用于为<strong>httpserver_webapp</strong>服务: 在mesher目录下执行下列linux命令创建mesher_webapp,此处除了可执行文件,还需要拷贝conf</p> |
| |
| <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">mkdir</span> /usr/local/src/mesher_webapp |
| <span class="nb">cp</span> ./mesher /usr/local/src/mesher_webapp |
| <span class="nb">cp</span> <span class="nt">-r</span> ./conf /usr/local/src/mesher_webapp |
| </code></pre></div> </div> |
| |
| <p>更改conf中配置文件,microservice.yaml中的<strong>服务name</strong>,从hellomesher改为<strong>webapp</strong>;更改chassis.yaml中监听的服务地址,从本地回环(127.0.0.1)地址改为<strong>内网ip</strong>(linux下通过ifconfig查看,如192.168.88.64):</p> |
| |
| <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>listenAddress: 127.0.0.1:40101 <span class="nt">-----</span>》 listenAddress: 192.168.88.64:40101 |
| listenAddress: 127.0.0.1:30101 <span class="nt">-----</span>》 listenAddress: 192.168.88.64:30101 |
| listenAddress: 127.0.0.1:30102 <span class="nt">-----</span>》 listenAddress: 192.168.88.64:30102 |
| </code></pre></div> </div> |
| </li> |
| <li> |
| <p>3、 创建<strong>mesher_calculator</strong></p> |
| |
| <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">mkdir</span> /usr/local/src/mesher_calculator |
| <span class="nb">cp</span> ./mesher /usr/local/src/mesher_calculator |
| <span class="nb">cp</span> <span class="nt">-r</span> ./conf /usr/local/src/mesher_calculator |
| </code></pre></div> </div> |
| |
| <p>更改conf中配置文件,分别更改<strong>microservice.yaml</strong>中的<strong>服务name</strong>为体质指数微服务名<strong>calculator</strong>;<br /> |
| 更改<strong>mesher_calculator</strong>配置<strong>chassis.yaml</strong>监听的地址和端口:</p> |
| |
| <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>listenAddress: 127.0.0.1:40101 <span class="nt">-----</span>》 listenAddress: 192.168.88.64:40107 |
| listenAddress: 127.0.0.1:30101 <span class="nt">-----</span>》 listenAddress: 192.168.88.64:30111 |
| listenAddress: 127.0.0.1:30102 <span class="nt">-----</span>》 listenAddress: 192.168.88.64:30112 |
| </code></pre></div> </div> |
| </li> |
| <li> |
| <p>4、 启动mesher服务,分别进入<strong>mesher_webapp</strong>和<strong>mesher_calculator</strong>,启动服务,其中需要设置mesher_calculator的<strong>SPECIFIC_ADDR</strong>地址,该地址用于将mesher和http服务绑定起来;</p> |
| |
| <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/mesher_calculator |
| <span class="nb">export </span><span class="nv">SPECIFIC_ADDR</span><span class="o">=</span>127.0.0.1:4540 |
| ./mesher |
| </code></pre></div> </div> |
| |
| <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/mesher_webapp |
| ./mesher |
| </code></pre></div> </div> |
| </li> |
| <li> |
| <p>5、 启动<strong>httpserver_webapp</strong>服务:</p> |
| |
| <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/httpserver_webapp |
| npm <span class="nb">install |
| export </span><span class="nv">http_proxy</span><span class="o">=</span>http://127.0.0.1:30101 |
| node ./httpserver_webapp.js |
| </code></pre></div> </div> |
| </li> |
| <li> |
| <p>6、 <strong>httpserver_calculator</strong>作为体质指数计算服务,需要安装python2.7,依赖BaseHTTPServer包:</p> |
| |
| <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="nb">cd</span> /usr/local/src/httpserver_calculator |
| ./httpserver_calculator.py |
| </code></pre></div> </div> |
| </li> |
| </ul> |
| |
| <h2 id="开始测试">开始测试</h2> |
| |
| <ul> |
| <li> |
| <p>1、 浏览器打开页面<a href="http://192.168.88.64:30103">http://192.168.88.64:30103</a> (如果打不开需要开启服务中心service-center的front服务,参考 <a href="http://servicecomb.apache.org/cn/users/setup-environment/#%E8%BF%90%E8%A1%8Cservice-center">http://servicecomb.apache.org/cn/users/setup-environment/#%E8%BF%90%E8%A1%8Cservice-center</a>) 查看服务,其中地址service-center服务启动的地址,看到如图界面。<strong>webapp</strong>代表<strong>mesher_webapp</strong>服务,这里展示的是microservice.yaml中配置的服务名。<strong>calculator</strong>代表<strong>mesher_calculator</strong>服务,这里展示的是microservice.yaml中配置的服务名。大写的<strong>SERVICECENTER</strong>是服务中心;</p> |
| |
| <p><img src="/assets/images/mesher/mesher-servercenter.png" alt="服务中心监控图" /></p> |
| </li> |
| <li> |
| <p>2、 浏览器打开<a href="http://192.168.88.64:4597">http://192.168.88.64:4597</a>,可以看到如下界面,为webapp呈现的静态页面:</p> |
| |
| <p><img src="/assets/images/mesher/mesher-testinit.png" alt="bmi测试初始化图" /></p> |
| </li> |
| <li> |
| <p>3、 输入参数(180、70)点击submit,显示如下图:</p> |
| |
| <p><img src="/assets/images/mesher/mesher-testpythonhttp.png" alt="bmi测试初始化图" /></p> |
| </li> |
| </ul> |
| |
| <h1 id="下一步">下一步</h1> |
| |
| <ul> |
| <li>阅读<a href="/cn/docs/mesher-quick-start-advance/"><strong>mesher</strong>进阶</a>。</li> |
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