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+  <article class="page" itemscope itemtype="http://schema.org/CreativeWork";>
+    <meta itemprop="headline" content="用透明RPC开发微服务">
+    <meta itemprop="description" content="用透明RPC开发微服务">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" 
itemprop="headline">用透明RPC开发微服务
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On 
This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" 
id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#开发示例" 
id="markdown-toc-开发示例">开发示例</a></li>
+  <li><a href="#通过注解配置的开发方式" 
id="markdown-toc-通过注解配置的开发方式">通过注解é…
ç½®çš„开发方式</a></li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>透明RPC开发模式是一种基于接口和接口实现的开发模式,服务的开发è€
…不需要使用Spring MVC和JAX-RS注解。</p>
+
+<h2 id="开发示例">开发示例</h2>
+
+<p>透明RPC开发模式支持Spring xml配置和注解é…
ç½®ä¸¤ç§æœåŠ¡å‘å¸ƒæ–¹å¼ï¼Œé€šè¿‡Spring xml配置的方式如下:</p>
+
+<ul>
+  <li>
+    <p><strong>步骤 1</strong> 定义服务接口。</p>
+
+    <p>根据开发之前定义好的契约,编写Java业务接口,代ç 
å¦‚下:</p>
+
+    <div class="language-java highlighter-rouge"><pre class="highlight"><code> 
<span class="kd">public</span> <span class="kd">interface</span> <span 
class="nc">Hello</span> <span class="o">{</span>
+   <span class="n">String</span> <span class="nf">sayHi</span><span 
class="o">(</span><span class="n">String</span> <span 
class="n">name</span><span class="o">);</span>
+   <span class="n">String</span> <span class="nf">sayHello</span><span 
class="o">(</span><span class="n">Person</span> <span 
class="n">person</span><span class="o">);</span>
+ <span class="o">}</span>
+</code></pre>
+    </div>
+
+    <blockquote>
+      <p><strong>说明</strong>:
+该接口的位置需要与契约中x-java-interface所指定的路径一致。</p>
+    </blockquote>
+  </li>
+  <li>
+    <p><strong>步骤 2</strong> 实现服务</p>
+
+    <p>Hello的服务实现如下:</p>
+
+    <div class="language-java highlighter-rouge"><pre class="highlight"><code> 
<span class="kn">import</span> <span 
class="nn">io.servicecomb.samples.common.schema.Hello</span><span 
class="o">;</span>
+ <span class="kn">import</span> <span 
class="nn">io.servicecomb.samples.common.schema.models.Person</span><span 
class="o">;</span>
+
+ <span class="kd">public</span> <span class="kd">class</span> <span 
class="nc">HelloImpl</span> <span class="kd">implements</span> <span 
class="n">Hello</span> <span class="o">{</span>
+   <span class="nd">@Override</span>
+   <span class="kd">public</span> <span class="n">String</span> <span 
class="nf">sayHi</span><span class="o">(</span><span class="n">String</span> 
<span class="n">name</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello "</span> <span 
class="o">+</span> <span class="n">name</span><span class="o">;</span>
+   <span class="o">}</span>
+
+   <span class="nd">@Override</span>
+   <span class="kd">public</span> <span class="n">String</span> <span 
class="nf">sayHello</span><span class="o">(</span><span class="n">Person</span> 
<span class="n">person</span><span class="o">)</span> <span class="o">{</span>
+     <span class="k">return</span> <span class="s">"Hello person "</span> 
<span class="o">+</span> <span class="n">person</span><span 
class="o">.</span><span class="na">getName</span><span class="o">();</span>
+   <span class="o">}</span>
+ <span class="o">}</span>
+</code></pre>
+    </div>
+  </li>
+  <li>
+    <p><strong>步骤 3</strong> 发布服务</p>
+
+    
<p>在resources/META-INF/spring目录下创建pojoHello.bean.xml文件,在文件中声明schema,文件å†
…容如下:</p>
+
+    <div class="language-xml highlighter-rouge"><pre class="highlight"><code> 
<span class="cp">&lt;?xml version="1.0" encoding="UTF-8"?&gt;</span>
+ <span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span 
class="s">" http://www.springframework.org/schema/beans "</span> <span 
class="na">xmlns:xsi=</span><span class="s">" 
http://www.w3.org/2001/XMLSchema-instance "</span>
+        <span class="na">xmlns:p=</span><span class="s">" 
http://www.springframework.org/schema/p "</span> <span 
class="na">xmlns:util=</span><span class="s">" 
http://www.springframework.org/schema/util "</span>
+        <span class="na">xmlns:cse=</span><span class="s">" 
http://www.huawei.com/schema/paas/cse/rpc "</span>
+        <span class="na">xmlns:context=</span><span class="s">" 
http://www.springframework.org/schema/context "</span>
+        <span class="na">xsi:schemaLocation=</span><span class="s">" 
http://www.springframework.org/schema/beans 
classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd 
http://www.huawei.com/schema/paas/cse/rpc 
classpath:META-INF/spring/spring-paas-cse-rpc.xsd"</span><span 
class="nt">&gt;</span>
+   
+     <span class="nt">&lt;cse:rpc-schema</span> <span 
class="na">schema-id=</span><span class="s">"pojoHello"</span> <span 
class="na">implementation=</span><span 
class="s">"io.servicecomb.samples.pojo.provider.PojoHelloImpl"</span><span 
class="nt">/&gt;</span>
+ <span class="nt">&lt;/beans&gt;</span>
+</code></pre>
+    </div>
+
+    <blockquote>
+      <p><strong>说明</strong>:
+每一个服务接口都需要定义一个schema声明。</p>
+    </blockquote>
+  </li>
+</ul>
+
+<h2 id="通过注解配置的开发方式">通过注解é…
ç½®çš„开发方式</h2>
+
+<ol>
+  <li>定义服务接口,与使用Spring xml的方式相同。</li>
+  <li>实现服务,与使用Spring xml的方式相同。</li>
+  <li>
+    
<p>发布服务。在接口Hello的实现类上使用@RpcSchema注解定义schema,代ç
 å¦‚下:</p>
+
+    <div class="language-java highlighter-rouge"><pre 
class="highlight"><code><span class="kn">import</span> <span 
class="nn">io.servicecomb.provider.pojo.RpcSchema</span><span class="o">;</span>
+<span class="c1">// other code omitted</span>
+<span class="nd">@RpcSchema</span><span class="o">(</span><span 
class="n">schemaId</span> <span class="o">=</span> <span 
class="s">"pojoHello"</span><span class="o">)</span>
+<span class="kd">public</span> <span class="kd">class</span> <span 
class="nc">HelloImpl</span> <span class="kd">implements</span> <span 
class="n">Hello</span> <span class="o">{</span>
+  <span class="c1">// other code omitted</span>
+<span class="o">}</span>
+</code></pre>
+    </div>
+
+    <p>在resources/META-INF/spring目录下的pojoHello.bean.xml文件中,é…
ç½®Spring进行服务扫描的base-package,文件内容如下:</p>
+
+    <div class="language-xml highlighter-rouge"><pre 
class="highlight"><code><span class="cp">&lt;?xml version="1.0" 
encoding="UTF-8"?&gt;</span>
+<span class="nt">&lt;beans</span> <span class="na">xmlns=</span><span 
class="s">" http://www.springframework.org/schema/beans "</span> <span 
class="na">xmlns:xsi=</span><span class="s">" 
http://www.w3.org/2001/XMLSchema-instance "</span>
+       <span class="na">xmlns:p=</span><span class="s">" 
http://www.springframework.org/schema/p "</span> <span 
class="na">xmlns:util=</span><span class="s">" 
http://www.springframework.org/schema/util "</span>
+       <span class="na">xmlns:cse=</span><span class="s">" 
http://www.huawei.com/schema/paas/cse/rpc "</span>
+       <span class="na">xmlns:context=</span><span class="s">" 
http://www.springframework.org/schema/context "</span>
+       <span class="na">xsi:schemaLocation=</span><span class="s">" 
http://www.springframework.org/schema/beans 
classpath:org/springframework/beans/factory/xml/spring-beans-3.0.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd 
http://www.huawei.com/schema/paas/cse/rpc 
classpath:META-INF/spring/spring-paas-cse-rpc.xsd"</span><span 
class="nt">&gt;</span>
+   
+    <span class="nt">&lt;context:component-scan</span> <span 
class="na">base-package=</span><span 
class="s">"io.servicecomb.samples.pojo.provider"</span><span 
class="nt">/&gt;</span>
+<span class="nt">&lt;/beans&gt;</span>
+</code></pre>
+    </div>
+  </li>
+</ol>
+
+<blockquote>
+  <p><strong>说明</strong>:
+与Spring 
MVC开发模式和JAX-RS开发模式不同的是,透明RPC开发模式使用的注解是<code
 class="highlighter-rouge">@RpcSchema</code>而非<code 
class="highlighter-rouge">@RestSchema</code>。</p>
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+    <meta itemprop="headline" content="分布式调用链追踪">
+    <meta itemprop="description" content="分布式调用链追踪">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" 
itemprop="headline">分布式调用链追踪
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On 
This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" 
id="markdown-toc-概念阐述">概念阐述</a></li>
+  <li><a href="#zipkin" id="markdown-toc-zipkin">Zipkin</a></li>
+  <li><a href="#使用步骤" id="markdown-toc-使用步骤">使用步骤:</a> 
   <ul>
+      <li><a href="#添加依赖" id="markdown-toc-添加依赖">添加
依赖</a></li>
+      <li><a href="#配置追踪处理和数据收集" id="markdown-toc-é…
ç½®è¿½è¸ªå¤„理和数据收集">配置追踪处理和数据收集</a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<p>微服务架构解决了很多单体应用带来的问题,但同时也需要我们付出额外的代价。由于网络的不稳定性带来的请求处理延迟就是代价之一。</p>
+
+<p>在单体应用中,所有模块都在同一个进程中运行,所以并没有模块间互通的问题。但微服务架构中,服务间通过网络沟通,å›
 æ­¤æˆ‘们不得不处理和网络有关的 问题,例如:延迟、超
时、网络分区等。</p>
+
+<p>另外,随着业务的扩展服务增多,我们很难洞察数据如何在蛛网般复杂的服务结构中流转。我们如何才能有效的监控网络延迟并且可视化服务中的数据流转呢?</p>
+
+<p><strong>分布式调用链追踪</strong>用于有效地监控微服务的网络延时并可视化微服务中的数据流转。</p>
+
+<h2 id="zipkin">Zipkin</h2>
+
+<blockquote>
+  <p><a 
href="http://zipkin.io/";>Zipkin</a>是一个分布式调用链追踪系统。 
它能帮助用户收集时序数据用以定位微服务中的延迟问题,它同时管理追踪数据的收集
 和查询。Zipkin 的设计基于 Google <a 
href="http://research.google.com/pubs/pub36356.html";>Dapper paper</a>。</p>
+</blockquote>
+
+<p>ServiceComb 集成了 Zipkin 
提供自动调用链追踪能力,如此一来用户只需要专注实现å…
¶ä¸šåŠ¡éœ€æ±‚ã€‚</p>
+
+<h2 id="使用步骤">使用步骤:</h2>
+
+<h3 id="添加依赖">添加依赖</h3>
+
+<p>基于 ServiceComb Java Chassis 的微服务只需要添加如下依赖到 
pom.xml:</p>
+
+<div class="language-xml highlighter-rouge"><pre class="highlight"><code><span 
class="nt">&lt;dependency&gt;</span>   
+    <span class="nt">&lt;groupId&gt;</span>io.servicecomb<span 
class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>handler-tracing-zipkin<span 
class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre>
+</div>
+
+<p>如果微服务是基于 Spring Cloud + Zuul 的 API 网关,例如 
workshop demo 中的 manager service ,我们还需要加å…
¥å¦‚下的额外依赖:</p>
+
+<div class="language-xml highlighter-rouge"><pre class="highlight"><code><span 
class="nt">&lt;dependency&gt;</span>    
+    <span class="nt">&lt;groupId&gt;</span>io.servicecomb<span 
class="nt">&lt;/groupId&gt;</span>
+    <span class="nt">&lt;artifactId&gt;</span>spring-cloud-zuul-zipkin<span 
class="nt">&lt;/artifactId&gt;</span>
+<span class="nt">&lt;/dependency&gt;</span>
+</code></pre>
+</div>
+
+<h3 id="配置追踪处理和数据收集">é…
ç½®è¿½è¸ªå¤„理和数据收集</h3>
+
+<p>在microservice.yaml文件中设置追踪处理器和数据收集服务地址</p>
+
+<div class="language-yaml highlighter-rouge"><pre 
class="highlight"><code><span class="s">cse</span><span class="pi">:</span> 
+  <span class="s">handler</span><span class="pi">:</span> 
+    <span class="s">chain</span><span class="pi">:</span> 
+      <span class="s">Consumer</span><span class="pi">:</span> 
+        <span class="s">default</span><span class="pi">:</span> <span 
class="s">tracing-consumer</span>
+      <span class="s">Provider</span><span class="pi">:</span> 
+        <span class="s">default</span><span class="pi">:</span> <span 
class="s">tracing-provider</span>
+<span class="s">servicecomb</span><span class="pi">:</span> 
+  <span class="s">tracing</span><span class="pi">:</span> 
+    <span class="s">collector</span><span class="pi">:</span> 
+      <span class="s">address</span><span class="pi">:</span> <span 
class="s">http://zipkin.servicecomb.io:9411</span>
+</code></pre>
+</div>
+
+<p>就这样,在加了两个配置项,没改动一行代码的情
况下,我们启动了基于 Zipkin 和 Java chassis 
的分布式调用链追踪的功能。</p>
+
+<p class="notice--warning"><strong>注意:</strong> 如果项目中的å…
¶ä»–依赖也引入了 zipkin (例如 Spring Cloud),可能导致 zipkin 
版本不一致而运行出错,这时需要在项目 pom 中声明 zipkin 
版本。</p>
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+    <meta itemprop="headline" content="使用confd和Nginx做边缘服务">
+    <meta itemprop="description" content="使用confd和Nginx做边缘服务">
+    
+    <meta itemprop="dateModified" content="August 15, 2017">
+
+    <div class="page__inner-wrap">
+      
+        
+          <header>
+            <h1 class="page__title" 
itemprop="headline">使用confd和Nginx做边缘服务
+</h1>
+            
+          </header>
+        
+      
+
+      <section class="page__content" itemprop="text">
+        <aside class="sidebar__right">
+<nav class="toc">
+    <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On 
This Page</h4></header> -->
+<ul class="toc__menu" id="markdown-toc">
+  <li><a href="#概念阐述" id="markdown-toc-概念阐述">概念阐述</a>  
  <ul>
+      <li><a href="#confd" 
id="markdown-toc-confd"><strong>confd</strong></a></li>
+      <li><a href="#nginx" 
id="markdown-toc-nginx"><strong>Nginx</strong></a></li>
+    </ul>
+  </li>
+  <li><a href="#场景描述" 
id="markdown-toc-场景描述">场景描述</a></li>
+  <li><a href="#对接服务中心" 
id="markdown-toc-对接服务中心">对接服务中心</a>    <ul>
+      <li><a href="#方法一http调用" 
id="markdown-toc-方法一http调用"><strong>方法一:http调用</strong></a></li>
+      <li><a href="#方法二使用servicecomb开源代码接口" 
id="markdown-toc-方法二使用servicecomb开源代ç 
æŽ¥å£"><strong>方法二:使用servicecomb开源代ç 
æŽ¥å£</strong></a></li>
+    </ul>
+  </li>
+</ul>
+
+  </nav>
+</aside>
+
+<h2 id="概念阐述">概念阐述</h2>
+
+<h3 id="confd"><strong>confd</strong></h3>
+
+<p>confd是一个轻量级的配置管理工具,源码地址:<a 
href="https://github.com/kelseyhightower/confd";>https://github.com/kelseyhightower/confd</a>,它可以将é
…
ç½®ä¿¡æ¯å­˜å‚¨åœ¨etcd、consul、dynamodb、redis以及zookeeper等。confd定期会从这些存储节点pull最新的é
…ç½®ï¼Œç„¶åŽé‡æ–°åŠ è½½æœåŠ¡ï¼Œå®Œæˆé…ç½®æ–‡ä»¶çš„æ›´æ–°ã€‚</p>
+
+<h3 id="nginx"><strong>Nginx</strong></h3>
+
+<p>Nginx (engine x)是一个高性能的HTTP和反向代理服务器,å…
·æœ‰è´Ÿè½½å‡è¡¡çš„功能。详情请参考<a 
href="http://www.nginx.cn/doc/";>http://www.nginx.cn/doc/</a>。本小节介绍的服务主要使用到的是Nginx的http代理功能。</p>
+
+<h2 id="场景描述">场景描述</h2>
+
+<p>本小节介绍的技术是使用nginx+confd做边缘服务,同时可以对接ServiceComb微服务框架中的服务中心,从服务中心中拉去服务信息通过confd动态更新nginx的é
…ç½®ã€‚</p>
+
+<p>使用nginx+confd动态反向代理的实现步骤可参考文章<a 
href="http://www.cnblogs.com/Anker/p/6112022.html";>http://www.cnblogs.com/Anker/p/6112022.html</a>,本节主要介绍confd如何对接ServiceComb框架的服务中心。</p>
+
+<h2 id="对接服务中心">对接服务中心</h2>
+
+<p>本节介绍的技术æ 
¸å¿ƒåœ¨äºŽå¦‚何使得confd获取到服务中心的服务信息,服务中心开放了以下接口供外部调用:</p>
+
+<h3 id="方法一http调用"><strong>方法一:http调用</strong></h3>
+
+<p>服务中心开放http接口均需要添加
租户头部信息:“X-Tenant-Name:tenantName”,tenameName为租户名,默认为default,例如”X-Tenant-Name:default”。</p>
+
+<ul>
+  <li>
+    <p>检查服务中心健康状态</p>
+
+    <div class="language-http highlighter-rouge"><pre 
class="highlight"><code><span class="err"> GET 127.0.0.1:9980/health
+</span></code></pre>
+    </div>
+  </li>
+  <li>
+    <p>获取所有微服务信息</p>
+
+    <div class="language-http highlighter-rouge"><pre 
class="highlight"><code><span class="err"> GET 
127.0.0.1:9980/registry/v3/microservices
+</span></code></pre>
+    </div>
+  </li>
+  <li>
+    <p>获取指定id的微服务信息</p>
+  </li>
+</ul>
+
+<blockquote>
+  <ol>
+    <li>
+      <p>首先根据微服务信息获取serviceId</p>
+
+      <div class="language-http highlighter-rouge"><pre 
class="highlight"><code><span class="err">GET 
127.0.0.1:9980/registry/v3/existence?type=microservice&amp;appId={appId}&amp;serviceName={serviceName}&amp;version={version}
+</span></code></pre>
+      </div>
+    </li>
+    <li>
+      <p>根据上述接口返回的serviceId获取微服务完整信息</p>
+
+      <div class="language-http highlighter-rouge"><pre 
class="highlight"><code><span class="err">GET 
127.0.0.1:9980/registry/v3/microservices/{serviceId}
+</span></code></pre>
+      </div>
+    </li>
+  </ol>
+</blockquote>
+
+<ul>
+  <li>
+    <p>获取指定微服务的所有实例信息</p>
+
+    <div class="language-http highlighter-rouge"><pre 
class="highlight"><code><span class="err"> GET 
127.0.0.1:9980/registry/v3/microservices/{serviceId}/instances
+</span></code></pre>
+    </div>
+    <p>需要在header中添加:”X-ConsumerId:{serviceId}”。</p>
+  </li>
+  <li>
+    <p>查找微服务实例信息</p>
+
+    <div class="language-http highlighter-rouge"><pre 
class="highlight"><code><span class="err"> GET 
127.0.0.1:9980/registry/v3/instances?appId={appId}&amp;serviceName={serviceName}&amp;version={version}
+</span></code></pre>
+    </div>
+    <p>需要在header中添加”X-ConsumerId:{serviceId}”。</p>
+  </li>
+</ul>
+
+<p>注意:在实际开发中请访问实际
的service-center访问地址,并将上述url中{}的变量替换成å…
·ä½“值,http返回的数据均为json格式</p>
+
+<h3 id="方法二使用servicecomb开源代ç 
æŽ¥å£"><strong>方法二:使用servicecomb开源代码接口</strong></h3>
+
+<p>在开发微服务应用,只需要调用servicecomb框架代码中的工å…
·ç±»RegistryUtil.java中提供的接口,即可获取服务中心的信息,接口描述如下:</p>
+
+<ul>
+  <li>获取所有微服务信息
+    <div class="language-java highlighter-rouge"><pre class="highlight"><code> 
<span class="n">List</span><span class="o">&lt;</span><span 
class="n">Microservice</span><span class="o">&gt;</span> <span 
class="nf">getAllMicroservices</span><span class="o">();</span>
+</code></pre>
+    </div>
+  </li>
+  <li>获取微服务唯一标识
+    <div class="language-java highlighter-rouge"><pre class="highlight"><code> 
<span class="n">String</span> <span class="nf">getMicroserviceId</span><span 
class="o">(</span><span class="n">String</span> <span 
class="n">appId</span><span class="o">,</span> <span class="n">String</span> 
<span class="n">microserviceName</span><span class="o">,</span> <span 
class="n">String</span> <span class="n">versionRule</span><span 
class="o">);</span>
+</code></pre>
+    </div>
+  </li>
+  <li>根据微服务唯一标识查询微服务静态信息
+    <div class="language-java highlighter-rouge"><pre class="highlight"><code> 
<span class="n">Microservice</span> <span 
class="nf">getMicroservice</span><span class="o">(</span><span 
class="n">String</span> <span class="n">microserviceId</span><span 
class="o">);</span>
+</code></pre>
+    </div>
+  </li>
+  <li>根据多个微服务唯一标识查询所有微服务实例信息
+    <div class="language-java highlighter-rouge"><pre class="highlight"><code> 
<span class="n">List</span><span class="o">&lt;</span><span 
class="n">MicroserviceInstance</span><span class="o">&gt;</span> <span 
class="nf">getMicroserviceInstance</span><span class="o">(</span><span 
class="n">String</span> <span class="n">consumerId</span><span 
class="o">,</span> <span class="n">String</span> <span 
class="n">providerId</span><span class="o">);</span>
+</code></pre>
+    </div>
+  </li>
+  <li>按照app+interface+version查询实例endpoints信息
+    <div class="language-java highlighter-rouge"><pre class="highlight"><code> 
<span class="n">List</span><span class="o">&lt;</span><span 
class="n">MicroserviceInstance</span><span class="o">&gt;</span> <span 
class="nf">findServiceInstance</span><span class="o">(</span><span 
class="n">String</span> <span class="n">consumerId</span><span 
class="o">,</span> <span class="n">String</span> <span 
class="n">appId</span><span class="o">,</span> <span class="n">String</span> 
<span class="n">serviceName</span><span class="o">,</span><span 
class="n">String</span> <span class="n">versionRule</span><span 
class="o">);</span>
+</code></pre>
+    </div>
+  </li>
+</ul>
+
+<p>通过上述http接口可获取到服务中心的微服务和å…
¶å®žä¾‹çš„信息,从而通过confd动态更新nginx配置。</p>
+
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