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Posted to commits@servicecomb.apache.org by ni...@apache.org on 2017/12/12 09:18:13 UTC
[16/57] [partial] incubator-servicecomb-website git commit: Generated
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+ <meta itemprop="headline" content="Distributed Tracing">
+ <meta itemprop="description" content="Introduce how to use distributed tracing with ServiceComb in the BMI application">
+
+ <meta itemprop="dateModified" content="September 03, 2017">
+
+ <div class="page__inner-wrap">
+
+
+ <header>
+ <h1 class="page__title" itemprop="headline">Distributed Tracing
+</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="#before-you-start" id="markdown-toc-before-you-start">Before you start</a></li>
+ <li><a href="#enable" id="markdown-toc-enable">Enable</a></li>
+ <li><a href="#verification" id="markdown-toc-verification">Verification</a></li>
+ <li><a href="#whats-next" id="markdown-toc-whats-next">What’s next</a></li>
+</ul>
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+</aside>
+
+<p>Distributed handler chain tracing is used to monitor the network latencies and visualize the flow of requests through microservices. This guide shows how to use distributed tracing with <strong>ServiceComb</strong> in the BMI application.</p>
+
+<h2 id="before-you-start">Before you start</h2>
+
+<p>Walk through <a href="/docs/quick-start-bmi/">Develop microservice application in minutes</a> and have <strong>BMI application</strong> running.</p>
+
+<h2 id="enable">Enable</h2>
+
+<ol>
+ <li>
+ <p>Add distributed tracing dependency in <code class="highlighter-rouge">pom.xml</code> of <em>BMI calculator service</em>:</p>
+
+ <div class="language-xml highlighter-rouge"><pre class="highlight"><code> <span class="nt"><dependency></span>
+ <span class="nt"><groupId></span>io.servicecomb<span class="nt"></groupId></span>
+ <span class="nt"><artifactId></span>handler-tracing-zipkin<span class="nt"></artifactId></span>
+ <span class="nt"></dependency></span>
+</code></pre>
+ </div>
+ </li>
+ <li>
+ <p>Add handler chain of distributed tracing in <code class="highlighter-rouge">microservice.yaml</code> of <em>BMI calculator service</em>:</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">Provider</span><span class="pi">:</span>
+ <span class="s">default</span><span class="pi">:</span> <span class="s">tracing-provider</span>
+</code></pre>
+ </div>
+ </li>
+ <li>
+ <p>Add distributed tracing dependency in <code class="highlighter-rouge">pom.xml</code> of <em>BMI web service</em>:</p>
+
+ <div class="language-xml highlighter-rouge"><pre class="highlight"><code> <span class="nt"><dependency></span>
+ <span class="nt"><groupId></span>io.servicecomb<span class="nt"></groupId></span>
+ <span class="nt"><artifactId></span>spring-cloud-zuul-zipkin<span class="nt"></artifactId></span>
+ <span class="nt"></dependency></span>
+</code></pre>
+ </div>
+ </li>
+</ol>
+
+<p>The above configurations have already set up in the code. All you need to do is as follows:</p>
+
+<ol>
+ <li>
+ <p>Run <em>Zipkin</em> distributed service inside Docker.</p>
+
+ <div class="language-bash highlighter-rouge"><pre class="highlight"><code>docker run -d -p 9411:9411 openzipkin/zipkin
+</code></pre>
+ </div>
+ </li>
+ <li>
+ <p>Restart <em>BMI calculator service</em> with the following command:</p>
+
+ <div class="language-bash highlighter-rouge"><pre class="highlight"><code>mvn spring-boot:run -Drun.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=tracing-provider"</span>
+</code></pre>
+ </div>
+ </li>
+ <li>
+ <p>Restart <em>BMI web service</em> with the following command:</p>
+
+ <div class="language-bash highlighter-rouge"><pre class="highlight"><code>mvn spring-boot:run -Drun.jvmArguments<span class="o">=</span><span class="s2">"-Dservicecomb.tracing.enabled=true"</span>
+</code></pre>
+ </div>
+ </li>
+</ol>
+
+<h2 id="verification">Verification</h2>
+
+<ol>
+ <li>
+ <p>Visit <a>http://localhost:8889</a> . Input a positive height and weight and then click <em>Submit</em> button.</p>
+ </li>
+ <li>
+ <p>Visit <a>http://localhost:9411</a> to checkout the status of distributed tracing and get the following figure.</p>
+ </li>
+</ol>
+
+<p><img src="/assets/images/distributed-tracing-result.png" alt="Distributed tracing result" class="align-center" /></p>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+ <li>
+ <p>Learn more about <a href="/users/distributed-tracing/">Distributed Tracing</a></p>
+ </li>
+ <li>
+ <p>Read <a href="/docs/tracing-with-servicecomb/">Distributed Tracing with ServiceComb and Zipkin</a></p>
+ </li>
+ <li>
+ <p>See <a href="/users/">ServiceComb User Guide</a></p>
+ </li>
+ <li>
+ <p>Learn more from <a href="/docs/linuxcon-workshop-demo/">the Company application</a> for a more complete example of microservice applications integrated with ServiceComb</p>
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+ <article class="page" itemscope itemtype="http://schema.org/CreativeWork">
+ <meta itemprop="headline" content="Flow Control">
+ <meta itemprop="description" content="Introduce how to use flow control with ServiceComb in the BMI application">
+
+ <meta itemprop="dateModified" content="September 03, 2017">
+
+ <div class="page__inner-wrap">
+
+
+ <header>
+ <h1 class="page__title" itemprop="headline">Flow Control
+</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="#before-you-start" id="markdown-toc-before-you-start">Before you start</a></li>
+ <li><a href="#enable" id="markdown-toc-enable">Enable</a></li>
+ <li><a href="#verification" id="markdown-toc-verification">Verification</a></li>
+ <li><a href="#whats-next" id="markdown-toc-whats-next">What’s next</a></li>
+</ul>
+
+ </nav>
+</aside>
+
+<p>Flow control machanism controls the transmission speed to avoid microservices being overloaded. This guide shows how to use flow control with <strong>ServiceComb</strong> in the BMI application.</p>
+
+<h2 id="before-you-start">Before you start</h2>
+
+<p>Walk through <a href="/docs/quick-start-bmi/">Develop microservice application in minutes</a> and have <strong>BMI application</strong> running.</p>
+
+<h2 id="enable">Enable</h2>
+
+<ol>
+ <li>
+ <p>Add flow control dependency in <code class="highlighter-rouge">pom.xml</code> of <em>BMI calculator service</em>:</p>
+
+ <div class="language-xml highlighter-rouge"><pre class="highlight"><code> <span class="nt"><dependency></span>
+ <span class="nt"><groupId></span>io.servicecomb<span class="nt"></groupId></span>
+ <span class="nt"><artifactId></span>handler-flowcontrol-qps<span class="nt"></artifactId></span>
+ <span class="nt"></dependency></span>
+</code></pre>
+ </div>
+ </li>
+ <li>
+ <p>Add handler chain and configurations of flow control in <code class="highlighter-rouge">microservice.yaml</code> of <em>BMI calculator service</em>:</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">Provider</span><span class="pi">:</span>
+ <span class="s">default</span><span class="pi">:</span> <span class="s">qps-flowcontrol-provider</span>
+ <span class="s">flowcontrol</span><span class="pi">:</span>
+ <span class="s">Provider</span><span class="pi">:</span>
+ <span class="s">qps</span><span class="pi">:</span>
+ <span class="s">limit</span><span class="pi">:</span>
+ <span class="s">gateway</span><span class="pi">:</span> <span class="s">1</span>
+</code></pre>
+ </div>
+ </li>
+</ol>
+
+<p>The above configurations have already set up in the code. All you need to do is to stop all <strong>BMI calculator services</strong> and then start a new one with the following command:</p>
+
+<div class="language-bash highlighter-rouge"><pre class="highlight"><code>mvn spring-boot:run -Drun.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=qps-flowcontrol-provider -Dcse.flowcontrol.Provider.qps.limit.gateway=1"</span>
+</code></pre>
+</div>
+
+<h2 id="verification">Verification</h2>
+
+<p>Visit <a>http://localhost:8889</a>. Input a positive height and weight and then click <em>Submit</em> button twice or more in less than one second. You will see the web page change from the left one to the right one.</p>
+
+<p><img src="/assets/images/flow-control-result.png" alt="Flow control result" class="align-center" /></p>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+ <li>
+ <p>See quick start for <a href="/docs/quick-start-advance/service-management/">Service Management</a></p>
+ </li>
+ <li>
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+ <meta itemprop="headline" content="Advance microservice development">
+ <meta itemprop="description" content="Introduce how to use handler chain with ServiceComb in the BMI application">
+
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+
+ <div class="page__inner-wrap">
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+ <h1 class="page__title" itemprop="headline">Advance microservice development
+</h1>
+
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+
+
+
+ <section class="page__content" itemprop="text">
+ <p>This guide shows how to reinforce microservices with <strong>ServiceComb</strong>'s handler chain. From here you can learn how to use ServiceComb's handler chain by the following links below:</p>
+
+<ul>
+ <li>
+ <p><a href="/docs/quick-start-advance/load-balance/">Load Balance</a>. Distribute requests equally among service instances.</p>
+ </li>
+ <li>
+ <p><a href="/docs/quick-start-advance/flow-control/">Flow Control</a>. Limit number of requests of a microservice.</p>
+ </li>
+ <li>
+ <p><a href="/docs/quick-start-advance/service-management">Service Management</a>. Isolate abnormal services and stop cascading failure in microservice application.</p>
+ </li>
+ <li>
+ <p><a href="/docs/quick-start-advance/distributed-tracing">Distributed Tracing</a>. Visualize the flow of requests through microservices.</p>
+ </li>
+</ul>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+ <li>
+ <p>See <a href="/users/">ServiceComb User Guide</a></p>
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+ <li><a href="#enable" id="markdown-toc-enable">Enable</a></li>
+ <li><a href="#verification" id="markdown-toc-verification">Verification</a></li>
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+
+<p>When we scale up <em>BMI calculator service</em>, requests from <em>BMI web service</em> need to distribute equally to each <em>BMI calculator service</em>. This guide shows how to use load balance with <strong>ServiceComb</strong> in the BMI application.</p>
+
+<h2 id="before-you-start">Before you start</h2>
+
+<p>Walk through <a href="/docs/quick-start-bmi/">Develop microservice application in minutes</a> and have <strong>BMI application</strong> running.</p>
+
+<h2 id="enable">Enable</h2>
+
+<p>The simple embedded load balancer will be used by default. No extra configurations needed.</p>
+
+<h2 id="verification">Verification</h2>
+
+<p>Run one more <em>BMI calculator service</em> with the following command:</p>
+<div class="language-bash highlighter-rouge"><pre class="highlight"><code>mvn spring-boot:run -Drun.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.rest.address=0.0.0.0:7778"</span>
+</code></pre>
+</div>
+
+<p>To better distinguish different running instances, we added a new interface that returns instance id in the implementation of BMI calculator, details can refer to <a href="https://github.com/ServiceComb/ServiceComb-Java-Chassis/tree/master/samples/bmi/calculator">the implementation of BMI calculator</a>. Besides, a different service port is needed to avoid port conflict.</p>
+
+<p>Now you can see the instance id in the following figures shows up alternately by clicking the <em>Submit</em> button.</p>
+
+<p><img src="/assets/images/load-balance-result.png" alt="Load balance result" class="align-center" /></p>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+ <li>
+ <p>See quick start for <a href="/docs/quick-start-advance/flow-control/">Flow Control</a></p>
+ </li>
+ <li>
+ <p>Learn more about <a href="/users/service-configurations/#负载均衡策略">Load Balance</a></p>
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+ <meta itemprop="description" content="Introduce how to use service management with ServiceComb in the BMI application">
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+ <meta itemprop="dateModified" content="September 03, 2017">
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+ <header>
+ <h1 class="page__title" itemprop="headline">Service Management
+</h1>
+
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+
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+ <!-- <header><h4 class="nav__title"><i class="fa fa-file-text"></i> On This Page</h4></header> -->
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+ <li><a href="#enable" id="markdown-toc-enable">Enable</a></li>
+ <li><a href="#verification" id="markdown-toc-verification">Verification</a></li>
+ <li><a href="#whats-next" id="markdown-toc-whats-next">What’s next</a></li>
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+
+<p>Service management is mainly used to solve or ease avalanche effect of microservices. Abnormal microservices will be isolated and stop cascading failure to reduce unnecessary resource. This guide shows how to use service management with <strong>ServiceComb</strong> in the BMI application.</p>
+
+<h2 id="before-you-start">Before you start</h2>
+
+<p>Walk through <a href="/docs/quick-start-bmi/">Develop microservice application in minutes</a> and have <strong>BMI application</strong> running.</p>
+
+<h2 id="enable">Enable</h2>
+
+<ol>
+ <li>
+ <p>Add service management dependency in <code class="highlighter-rouge">pom.xml</code> of <em>BMI calculator service</em>:</p>
+
+ <div class="language-xml highlighter-rouge"><pre class="highlight"><code> <span class="nt"><dependency></span>
+ <span class="nt"><groupId></span>io.servicecomb<span class="nt"></groupId></span>
+ <span class="nt"><artifactId></span>handler-bizkeeper<span class="nt"></artifactId></span>
+ <span class="nt"></dependency></span>
+</code></pre>
+ </div>
+ </li>
+ <li>
+ <p>Configure handler chain of service management and fallback strategy:</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">Provider</span><span class="pi">:</span>
+ <span class="s">default</span><span class="pi">:</span> <span class="s">bizkeeper-provider</span>
+ <span class="s">circuitBreaker</span><span class="pi">:</span>
+ <span class="s">Provider</span><span class="pi">:</span>
+ <span class="s">calculator</span><span class="pi">:</span>
+ <span class="s">requestVolumeThreshold</span><span class="pi">:</span> <span class="s">3</span>
+ <span class="s">fallbackpolicy</span><span class="pi">:</span>
+ <span class="s">Provider</span><span class="pi">:</span>
+ <span class="s">policy</span><span class="pi">:</span> <span class="s">returnnull</span>
+</code></pre>
+ </div>
+ </li>
+</ol>
+
+<p>The above configurations have already set up in the code. All you need to do is to restart the <em>BMI calculator services</em> with the following command:</p>
+
+<div class="language-bash highlighter-rouge"><pre class="highlight"><code>mvn spring-boot:run -Drun.jvmArguments<span class="o">=</span><span class="s2">"-Dcse.handler.chain.Provider.default=bizkeeper-provider -Dcse.circuitBreaker.Provider.calculator.requestVolumeThreshold=3 -Dcse.fallbackpolicy.Provider.policy=returnnull"</span>
+</code></pre>
+</div>
+
+<h2 id="verification">Verification</h2>
+
+<ol>
+ <li>
+ <p>Circuit-break microservices. Visit <a>http://localhost:8889</a>, enter a negative height or weight and click the <em>Submit</em> button three times or more continuously. Then the web page should look like the left one in fig-1.</p>
+ </li>
+ <li>
+ <p>Verify serivces are in circuit-break status. Enter a positive height and weight, then click <em>Submit</em> button. The web page still looks like the left one in fig-1. In the meanwhile, no exceptions show in the log of <em>BMI calculator service</em>. Instead it shows lines contain “fallback called”.</p>
+ </li>
+ <li>
+ <p>Verify the service back online again. Wait for about 15 seconds, enter a positive height and weight, then click <em>Submit</em> button. You will see the service works fine again like the right one in fig-1.</p>
+ </li>
+</ol>
+
+<p class="figure-caption"><img src="/assets/images/service-management-result.png" alt="Service management result" class="align-center" />
+fig-1 Service management result</p>
+
+<h2 id="whats-next">What’s next</h2>
+
+<ul>
+ <li>
+ <p>See quick start for <a href="/docs/quick-start-advance/distributed-tracing/">Distributed Tracing</a></p>
+ </li>
+ <li>
+ <p>Learn more about <a href="/users/service-configurations/">Service Management</a></p>
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