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10<meta name="twitter:site" content="@admiraltyio"><title data-react-helmet="true">Introduction | Admiralty</title><meta data-react-helmet="true" name="docsearch:version" content="current,latest"><meta data-react-helmet="true" property="og:image" content="https://admiralty.io/Admiralty Ver3 - Logomark Only - Transparent (PNG).png"><meta data-react-helmet="true" property="twitter:image" content="https://admiralty.io/Admiralty Ver3 - Logomark Only - Transparent (PNG).png"><meta data-react-helmet="true" name="twitter:image:alt" content="Image for Admiralty"><meta data-react-helmet="true" name="twitter:card" content="summary_large_image"><meta data-react-helmet="true" property="og:title" content="Introduction | Admiralty"><meta data-react-helmet="true" name="description" content="Admiralty is a system of Kubernetes controllers that intelligently schedules workloads across clusters. It is simple to use and simple to integrate with other tools. It enables many multi-cluster, multi-region, multi-cloud, and hybrid (simply put, global computing) use cases:"><meta data-react-helmet="true" property="og:description" content="Admiralty is a system of Kubernetes controllers that intelligently schedules workloads across clusters. It is simple to use and simple to integrate with other tools. It enables many multi-cluster, multi-region, multi-cloud, and hybrid (simply put, global computing) use cases:"><meta data-react-helmet="true" property="og:url" content="https://admiralty.io/docs/"><link data-react-helmet="true" rel="shortcut icon" href="/Admiralty Ver3 - Logomark Only - Transparent (PNG).png"><link data-react-helmet="true" rel="preconnect" href="https://BH4D9OD16A-dsn.algolia.net" crossorigin="anonymous"><link data-react-helmet="true" rel="canonical" href="https://admiralty.io/docs/"><link rel="stylesheet" href="/styles.b08511c4.css">
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32Helm Chart</a></li><li class="menu__list-item"><a class="menu__link" tabindex="-1" href="/docs/api_reference/cli">CLI</a></li></ul></li><li class="menu__list-item"><a href="https://github.com/admiraltyio/admiralty/blob/master/CHANGELOG.md" target="_blank" rel="noreferrer noopener" class="menu__link">Release Notes</a></li><li class="menu__list-item"><a href="https://github.com/admiraltyio/admiralty/tree/master/LICENSE" target="_blank" rel="noreferrer noopener" class="menu__link">License</a></li></ul></div></div></div><main class="docMainContainer_3EyW"><div class="container padding-vert--lg docItemWrapper_1EkI"><div class="row"><div class="col docItemCol_2ASc"><div class="docItemContainer_3QWW"><article><header><h1 class="docTitle_1Lrw">Introduction</h1></header><div class="markdown"><p>Admiralty is a system of Kubernetes controllers that intelligently schedules workloads across clusters. It is simple to use and simple to integrate with other tools. It enables many multi-cluster, multi-region, multi-cloud, and hybrid (simply put, global computing) use cases:</p><ul style="columns:2"><li>high availability,</li><li>active-active disaster recovery,</li><li>dynamic content delivery networks (dCDNs),</li><li>distributed workflows,</li><li>edge computing, Internet of Things (IoT), 5G,</li><li>central access control and auditing,</li><li>blue/green cluster upgrades,</li><li>cluster abstraction (clusters as cattle),</li><li>resource federation (including global research platforms),</li><li>cloud bursting,</li><li>cloud arbitrage...</li></ul><p>In a nutshell, here&#x27;s how Admiralty works:</p><ol><li>Install Admiralty in each cluster that you want to federate. Configure clusters as sources and/or targets to build a centralized or decentralized topology.</li><li>Annotate any pod or pod template (e.g., of a Deployment, Job, or <a href="https://argoproj.github.io/projects/argo" target="_blank" rel="noopener noreferrer">Argo</a> Workflow, among others) in any source cluster with <code>multicluster.admiralty.io/elect=&quot;&quot;</code>.</li><li>Admiralty mutates the elected pods into <em>proxy pods</em> scheduled on <a href="https://virtual-kubelet.io/" target="_blank" rel="noopener noreferrer">virtual-kubelet</a>
32 nodes representing target clusters, and creates <em>delegate pods</em> in the remote clusters (actually running the containers).</li><li>Pod dependencies (config maps and secrets) and dependents (services and ingresses) &quot;follow&quot; delegate pods, i.e., they are copied as needed to target clusters.</li><li>A feedback loop updates the statuses and annotations of the proxy pods to reflect the statuses and annotations of the delegate pods.</li><li><code>kubectl logs</code> and <code>kubectl exec</code> work as expected.</li><li>Integrate with Admiralty Cloud/Enterprise, <a href="https://cilium.io/blog/2019/03/12/clustermesh/" target="_blank" rel="noopener noreferrer">Cilium</a> and other third-party solutions to enable north-south and east-west networking across clusters.</li></ol><div class="admonition admonition-note alert alert--secondary"><div class="admonition-heading"><h5><span class="admonition-icon"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="16" viewBox="0 0 14 16"><path fill-rule="evenodd" d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z"></path></svg></span>Open Source and Admiralty Cloud/Enterprise</h5></div><div class="admonition-content"><p>This documentation covers both the Admiralty open source cluster agent and Admiralty Cloud/Enterprise. Features only available with Admiralty Cloud/Enterprise are clearly marked; in that case, as much as possible, open source and commercial third-party alternatives are discussed.</p></div></div></div></article><div class="margin-vert--xl"><div class="row"><div class="col"><a href="https://github.com/admiraltyio/admiralty/edit/master/docs/introduction.md" target="_blank" rel="noreferrer noopener"><svg fill="currentColor" height="1.2em" width="1.2em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 40 40" style="margin-right:0.3em;vertical-align:sub"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div></div></div><div class="margin-vert--lg"><nav class="pagination-nav" aria-label="Blog list page navigation"><div class="pagination-nav__item"></div><div class="pagination-nav__item pagination-nav__item--next"><a class="pagination-nav__link" href="/docs/quick_start"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Quick Start »</div></a></div></nav></div></div></div><div class="col col--3"><div class="tableOfContents_3SO_"></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container"><div class="text--center"><div class="margin-bottom--sm"><img class="footer__logo" alt="Admiralty Logo" src="/Admiralty Ver3 - Logomark Only (RGB EPS).svg"></div><div>Copyright 2024 The Admiralty Authors.</div></div></div></footer></div>
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