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title: java-operator-sdk

description: Build Kubernetes Operators in Java without hassle

layout: homepage

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<h2>Sponsored by:</h2>

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<span class="uk-h3 uk-inline uk-padding-small"> & </span>

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Whether you want to build applications that operate themselves or provision infrastructure from

Java code, Kubernetes Operators are the way to go. <strong class="uk-text-primary uk-text-uppercase">java-operator-sdk</strong> is

based on the <a href="https://github.com/fabric8io/kubernetes-client" alt="fabric8">fabric8</a> Kubernetes client and will make it

easy for Java developers to embrace this new way of automation.

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<h2 class="uk-text-center uk-margin-large-bottom"> Why build your own Operator?</h2>

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<h3 class="uk-card-title">Infrastructure automation using the power and flexibility of Java</h3>

<p>- see <a href="https://blog.container-solutions.com/cloud-native-java-infrastructure-automation-with-kubernetes-operators">blog

post</a></p>

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<h3 class="uk-card-title">Provisioning of complex applications</h3>

<p>- avoid Helm chart hell</p>

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<h3 class="uk-card-title">Integration with Cloud services</h3>

<p>- e.g. Secret stores</p>

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<h3 class="uk-card-title">Safer deployment of applications</h3>

<p>- only expose cluster to users by Custom Resources</p>

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<h2 class="uk-text-center uk-margin-large-bottom"> Features</h2>

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<li>Framework for handling Kubernetes API events</li>

<li>Mapping Custom Resources to Java classes</li>

<li>Retry action on failure</li>

<li>Smart event scheduling <small>(only handle latest event for the same resource)</small></li>

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<li> Avoid concurrency issues - related events are serialized, unrelated executed in parallel</li>

<li>Smooth integration with Quarkus and Spring Boot</li>

<li>Handling of events from non-Kubernetes resources</li>

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<h2 class="uk-text-center uk-margin-large-bottom"> Roadmap</h2>

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<li class="uk-card uk-padding-small"><span class="uk-text-primary" uk-icon="icon: chevron-double-right"></span> Comprehensive

documentation

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<li class="uk-card uk-padding-small"><span class="uk-text-primary" uk-icon="icon: chevron-double-right"></span> Integrate with

operator-sdk to generate project skeleton

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<li class="uk-card uk-padding-small"><span class="uk-text-primary" uk-icon="icon: chevron-double-right"></span> Testing of the

framework and all samples while running on a real cluster.

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<li class="uk-card uk-padding-small"><span class="uk-text-primary" uk-icon="icon: chevron-double-right"></span> Generate Java

classes from CRD definion (and/or the other way around)

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<h2 class="uk-text-center uk-margin-large-bottom"> Contributing</h2>

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<h3 class="uk-card-title uk-margin-remove-bottom">We are a friendly team of Java and Kubernetes enthusiasts and welcome everyone

to contribute in any way to the framework!</h3>

<p class="uk-text-meta uk-margin-remove-top">

<time datetime="2016-04-01T19:00">April 01, 2016</time>

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Get in touch either on <a href="https://github.com/java-operator-sdk/java-operator-sdk">GitHub</a> or our <a href="https://discord.gg/DacEhAy" alt="discord server">Discord server</a>, we are always

happy to chat and help

you find the right issue to get started.</br>

Feel free to stop by for questions, comments or just saying <i>"Hi"</i>.

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<p> We have a <a href="{{baseurl}}/coc">code of conduct</a>

which we strictly enforce, as well as <a

href="https://github.com/java-operator-sdk/java-operator-sdk/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22">issues

marked for new joiners</a>.

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<p> We are also supporting <a href="https://hacktoberfest.digitalocean.com/">#HacktoberFest</a> and have several issues marked as <a

href="https://github.com/java-operator-sdk/java-operator-sdk/issues?q=is%3Aissue+is%3Aopen+label%3A%22hacktoberfest%22+"> good

candidates </a>to pick up during the event.

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<button class="uk-button uk-button-primary uk-text-muted uk-button-medium "><a href="https://mvnrepository.com/artifact/io.javaoperatorsdk/java-operator-sdk"><span uk-icon="maven"></span> Maven</a></a></button>

<button class="uk-button uk-button-primary uk-text-muted uk-button-medium "><a href="https://github.com/java-operator-sdk/java-operator-sdk"><span uk-icon="github"></span> GitHub</a></button>

<button class="uk-button uk-button-primary uk-text-muted uk-button-medium"><a href="https://discord.gg/DacEhAy"><span uk-icon="discord"></span> Discord</a></button>

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