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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">Whatâs 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> + </li> +</ul> + + + </section> + + <footer class="page__meta"> + + + + + + </footer> + + + + + + </div> + + + </article> + + + +</div> + + + <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> + <div align="center" style="margin: 0 0;"> + <ins class="adsbygoogle" + style="display:block; border-bottom: initial;" + data-ad-client="ca-pub-7328585512091257" + data-ad-slot="3049671934" + data-ad-format="auto"></ins> + </div> + + <div class="page__footer"> + <footer> + <!-- start custom footer snippets --> + +<!-- end custom footer snippets --> + <div class="container"> + <div class="row justify-content-md-center"> + + <div class="col"> + <ul> + <p class="header">Resources</p> + <li><a href="/docs/quick-start/">Quick Start</a></li> + <li><a href="/users/user-guide/">User Guide</a></li> + <li><a href="/slides/">Slides</a></li> + <li><a href="/users/faq/">Common Questions</a></li> + </ul> + </div> + <div class="col"> + <ul> + <p class="header">Contribute</p> + <li><a href="https://github.com/ServiceComb/ServiceComb.github.io/issues/new?title=Issue with _docs/distributed-tracing.md">Report a Doc Issue</a></li> + <li><a href="https://github.com/ServiceComb/ServiceComb.github.io/edit/master/_docs/distributed-tracing.md";>Edit This Page on Github</a></li> + <li><a href="/developers/submit-codes/">Code Submit Guide</a></li> + </ul> + </div> + <div class="col"> + <ul class="social-icons"> + <p class="header">Community</p> + <li> + <a href="https://groups.google.com/forum/#!forum/servicecomb-developers"; target="_blank"><span class="group">Dev</span></a> | + <a href="https://groups.google.com/forum/#!forum/servicecomb-users"; target="_blank">User</span></a> + </li> + <li> + <a href="http://github.com/ServiceComb"; target="_blank"><span class="github">Github</span></a> + </li> + <li> + <a href="https://twitter.com/ServiceComb"; target="_blank"><span class="twitter">Twitter</span></a> + </li> + <li> + <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a> + </li> + </ul> + </div> + </div> +</div> +<div class="page__footer-bottom"> + <div>© 2017 Apache incubator ServiceComb. 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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">Whatâs next</h2> + +<ul> + <li> + <p>See quick start for <a href="/docs/quick-start-advance/service-management/">Service Management</a></p> + </li> + <li> + <p>Learn more about <a href="/users/service-configurations/#éæµçç¥">Flow Control</a></p> + </li> +</ul> + + + </section> + + <footer class="page__meta"> + + + + + + </footer> + + + + + + </div> + + + </article> + + + +</div> + + + <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> + <div align="center" style="margin: 0 0;"> + <ins class="adsbygoogle" + style="display:block; border-bottom: initial;" + data-ad-client="ca-pub-7328585512091257" + data-ad-slot="3049671934" + data-ad-format="auto"></ins> + </div> + + <div class="page__footer"> + <footer> + <!-- start custom footer snippets --> + +<!-- end custom footer snippets --> + <div class="container"> + <div class="row justify-content-md-center"> + + <div class="col"> + <ul> + <p class="header">Resources</p> + <li><a href="/docs/quick-start/">Quick Start</a></li> + <li><a href="/users/user-guide/">User Guide</a></li> + <li><a href="/slides/">Slides</a></li> + <li><a href="/users/faq/">Common Questions</a></li> + </ul> + </div> + <div class="col"> + <ul> + <p class="header">Contribute</p> + <li><a href="https://github.com/ServiceComb/ServiceComb.github.io/issues/new?title=Issue with _docs/flow-control.md">Report a Doc Issue</a></li> + <li><a href="https://github.com/ServiceComb/ServiceComb.github.io/edit/master/_docs/flow-control.md";>Edit This Page on Github</a></li> + <li><a href="/developers/submit-codes/">Code Submit Guide</a></li> + </ul> + </div> + <div class="col"> + <ul class="social-icons"> + <p class="header">Community</p> + <li> + <a href="https://groups.google.com/forum/#!forum/servicecomb-developers"; target="_blank"><span class="group">Dev</span></a> | + <a href="https://groups.google.com/forum/#!forum/servicecomb-users"; target="_blank">User</span></a> + </li> + <li> + <a href="http://github.com/ServiceComb"; target="_blank"><span class="github">Github</span></a> + </li> + <li> + <a href="https://twitter.com/ServiceComb"; target="_blank"><span class="twitter">Twitter</span></a> + </li> + <li> + <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a> + </li> + </ul> + </div> + </div> +</div> +<div class="page__footer-bottom"> + <div>© 2017 Apache incubator ServiceComb. 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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">Whatâs 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/#è´è½½åè¡¡çç¥">Load Balance</a></p> + </li> +</ul> + + + </section> + + <footer class="page__meta"> + + + + + + </footer> + + + + + + </div> + + + </article> + + + +</div> + + + <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> + <div align="center" style="margin: 0 0;"> + <ins class="adsbygoogle" + style="display:block; border-bottom: initial;" + data-ad-client="ca-pub-7328585512091257" + data-ad-slot="3049671934" + data-ad-format="auto"></ins> + </div> + + <div class="page__footer"> + <footer> + <!-- start custom footer snippets --> + +<!-- end custom footer snippets --> + <div class="container"> + <div class="row justify-content-md-center"> + + <div class="col"> + <ul> + <p class="header">Resources</p> + <li><a href="/docs/quick-start/">Quick Start</a></li> + <li><a href="/users/user-guide/">User Guide</a></li> + <li><a href="/slides/">Slides</a></li> + <li><a href="/users/faq/">Common Questions</a></li> + </ul> + </div> + <div class="col"> + <ul> + <p class="header">Contribute</p> + <li><a href="https://github.com/ServiceComb/ServiceComb.github.io/issues/new?title=Issue with _docs/load-balance.md">Report a Doc Issue</a></li> + <li><a href="https://github.com/ServiceComb/ServiceComb.github.io/edit/master/_docs/load-balance.md";>Edit This Page on Github</a></li> + <li><a href="/developers/submit-codes/">Code Submit Guide</a></li> + </ul> + </div> + <div class="col"> + <ul class="social-icons"> + <p class="header">Community</p> + <li> + <a href="https://groups.google.com/forum/#!forum/servicecomb-developers"; target="_blank"><span class="group">Dev</span></a> | + <a href="https://groups.google.com/forum/#!forum/servicecomb-users"; target="_blank">User</span></a> + </li> + <li> + <a href="http://github.com/ServiceComb"; target="_blank"><span class="github">Github</span></a> + </li> + <li> + <a href="https://twitter.com/ServiceComb"; target="_blank"><span class="twitter">Twitter</span></a> + </li> + <li> + <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a> + </li> + </ul> + </div> + </div> +</div> +<div class="page__footer-bottom"> + <div>© 2017 Apache incubator ServiceComb. 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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 âfallback calledâ.</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">Whatâs 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> + </li> +</ul> + + + </section> + + <footer class="page__meta"> + + + + + + </footer> + + + + + + </div> + + + </article> + + + +</div> + + + <script async src="//pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script> + <div align="center" style="margin: 0 0;"> + <ins class="adsbygoogle" + style="display:block; border-bottom: initial;" + data-ad-client="ca-pub-7328585512091257" + data-ad-slot="3049671934" + data-ad-format="auto"></ins> + </div> + + <div class="page__footer"> + <footer> + <!-- start custom footer snippets --> + +<!-- end custom footer snippets --> + <div class="container"> + <div class="row justify-content-md-center"> + + <div class="col"> + <ul> + <p class="header">Resources</p> + <li><a href="/docs/quick-start/">Quick Start</a></li> + <li><a href="/users/user-guide/">User Guide</a></li> + <li><a href="/slides/">Slides</a></li> + <li><a href="/users/faq/">Common Questions</a></li> + </ul> + </div> + <div class="col"> + <ul> + <p class="header">Contribute</p> + <li><a href="https://github.com/ServiceComb/ServiceComb.github.io/issues/new?title=Issue with _docs/service-management.md">Report a Doc Issue</a></li> + <li><a href="https://github.com/ServiceComb/ServiceComb.github.io/edit/master/_docs/service-management.md";>Edit This Page on Github</a></li> + <li><a href="/developers/submit-codes/">Code Submit Guide</a></li> + </ul> + </div> + <div class="col"> + <ul class="social-icons"> + <p class="header">Community</p> + <li> + <a href="https://groups.google.com/forum/#!forum/servicecomb-developers"; target="_blank"><span class="group">Dev</span></a> | + <a href="https://groups.google.com/forum/#!forum/servicecomb-users"; target="_blank">User</span></a> + </li> + <li> + <a href="http://github.com/ServiceComb"; target="_blank"><span class="github">Github</span></a> + </li> + <li> + <a href="https://twitter.com/ServiceComb"; target="_blank"><span class="twitter">Twitter</span></a> + </li> + <li> + <a href="/feed.xml" target="_blank"><span class="rss">Feed</span></a> + </li> + </ul> + </div> + </div> +</div> +<div class="page__footer-bottom"> + <div>© 2017 Apache incubator ServiceComb. 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