149 lines
5.4 KiB
HTML
149 lines
5.4 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Kubernetes Ecosystem Awareness</title>
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<link rel="stylesheet" href="css/spring.css">
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</head>
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<body class="book toc2 toc-left">
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<div id="header">
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<div id="toc" class="toc2">
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<div id="toctitle">Table of Contents</div>
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<ul class="sectlevel1">
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<li><a href="#_kubernetes_ecosystem_awareness">Kubernetes Ecosystem Awareness</a>
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<ul class="sectlevel2">
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<li><a href="#_kubernetes_profile_autoconfiguration">Kubernetes Profile Autoconfiguration</a></li>
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<li><a href="#_istio_awareness">Istio Awareness</a></li>
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</ul>
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</li>
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</ul>
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</div>
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</div>
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<div id="content">
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<div class="sect1">
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<h2 id="_kubernetes_ecosystem_awareness"><a class="link" href="#_kubernetes_ecosystem_awareness">Kubernetes Ecosystem Awareness</a></h2>
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<div class="sectionbody">
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<div class="paragraph">
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<p>All of the features described earlier in this guide work equally well, regardless of whether your application is running inside
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Kubernetes. This is really helpful for development and troubleshooting.
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From a development point of view, this lets you start your Spring Boot application and debug one
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of the modules that is part of this project. You need not deploy it in Kubernetes,
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as the code of the project relies on the
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<a href="https://github.com/fabric8io/kubernetes-client">Fabric8 Kubernetes Java client</a>, which is a fluent DSL that can
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communicate by using <code>http</code> protocol to the REST API of the Kubernetes Server.</p>
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</div>
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<div class="sect2">
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<h3 id="_kubernetes_profile_autoconfiguration"><a class="link" href="#_kubernetes_profile_autoconfiguration">Kubernetes Profile Autoconfiguration</a></h3>
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<div class="paragraph">
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<p>When the application runs as a pod inside Kubernetes, a Spring profile named <code>kubernetes</code> automatically gets activated.
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This lets you customize the configuration, to define beans that are applied when the Spring Boot application is deployed
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within the Kubernetes platform (for example, different development and production configuration).</p>
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</div>
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</div>
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<div class="sect2">
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<h3 id="_istio_awareness"><a class="link" href="#_istio_awareness">Istio Awareness</a></h3>
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<div class="paragraph">
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<p>When you include the <code>spring-cloud-kubernetes-istio</code> module in the application classpath, a new profile is added to the application,
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provided the application is running inside a Kubernetes Cluster with <a href="https://istio.io">Istio</a> installed. You can then use
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spring <code>@Profile("istio")</code> annotations in your Beans and <code>@Configuration</code> classes.</p>
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</div>
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<div class="paragraph">
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<p>The Istio awareness module uses <code>me.snowdrop:istio-client</code> to interact with Istio APIs, letting us discover traffic rules, circuit breakers, and so on,
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making it easy for our Spring Boot applications to consume this data to dynamically configure themselves according to the environment.</p>
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</div>
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</div>
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</div>
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</div>
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</div>
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