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| <meta itemprop="headline" content="负载均衡"> |
| <meta itemprop="description" content="介绍如何在体质指数应用中使用mesher提供的负载均衡能力"> |
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| <meta itemprop="dateModified" content="August 08, 2019"> |
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| <div class="page__inner-wrap"> |
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| <header> |
| <h1 class="page__title" itemprop="headline">负载均衡 |
| </h1> |
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| </header> |
| |
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| <section class="page__content" itemprop="text"> |
| <ul> |
| <li>mesher支持灵活的负载均衡算法。本指南将展示如何使用 <strong>mesher</strong> 提供的负载均衡能力。</li> |
| </ul> |
| |
| <h1 id="前言">前言</h1> |
| |
| <ul> |
| <li>在您进一步阅读之前,请确保您已阅读了<a href="/cn/docs/mesher-quick-start/">mesher快速入门</a>,并已成功运行用例服务。</li> |
| </ul> |
| |
| <h1 id="负载均衡算法">负载均衡算法</h1> |
| |
| <ul> |
| <li>启动一个新的<strong>mesher_calculator</strong>和<strong>httpserver_calculator</strong>实例用于负载均衡测试,可以使用例子目录<a href="https://github.com/apache/servicecomb-mesher/tree/master/examples/quick_start/test_balance">test_balance</a>下的服务:</li> |
| <li> |
| <p>1、修改mesher_calculator配置文件<strong>microservice.yaml</strong>中的服务name为<strong>calculator</strong>;<br /> |
| 更改配置<strong>chassis.yaml</strong>监听的地址和端口避免冲突:</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: 192.168.88.64:40102 |
| listenAddress: 127.0.0.1:30101 <span class="nt">-----</span>》 listenAddress: 192.168.88.64:30108 |
| listenAddress: 127.0.0.1:30102 <span class="nt">-----</span>》 listenAddress: 192.168.88.64:30109 |
| </code></pre></div> </div> |
| </li> |
| <li> |
| <p>2、 启动<strong>mesher_calculator</strong>,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">export </span><span class="nv">SPECIFIC_ADDR</span><span class="o">=</span>127.0.0.1:4537 |
| ./mesher |
| </code></pre></div> </div> |
| </li> |
| <li> |
| <p>3、 默认情况下会使用roundbin(轮询)负载均衡算法,另外还支持Random和SessionStickiness负载均衡算法。 我们修改mesher_webapp的配置文件chassis.yaml,将负载均衡方法配置为Random:</p> |
| |
| <div class="language-bash highlighter-rouge"><div class="highlight"><pre class="highlight"><code>loadbalance: |
| strategy: |
| name: Random |
| </code></pre></div> </div> |
| </li> |
| <li> |
| <p>4、 开启httpserver_calculator服务新实例,监听4537端口;</p> |
| </li> |
| <li> |
| <p>5、 此时点击 <em>Submit</em> 按钮就可以看到如下两个界面中的BMI Instance ID随机出现。</p> |
| |
| <p><img src="/assets/images/mesher/mesher-testpythonhttp.png" alt="bmi测试初始化图1" /><br /></p> |
| |
| <p><img src="/assets/images/mesher/mesher-testpythonhttp2.png" alt="bmi测试初始化图2" /></p> |
| </li> |
| </ul> |
| |
| <h1 id="下一步">下一步</h1> |
| |
| <ul> |
| <li> |
| <p>阅读<a href="/cn/docs/mesher-quick-start-advance/mesher-flow-control/">流量控制快速入门</a></p> |
| </li> |
| <li> |
| <p>了解更多<a href="/cn/users/service-configurations/#负载均衡策略">负载均衡</a>的使用方式</p> |
| </li> |
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