Fix up Tutorials landing page and Tutorials left nav. (#8557)
* Fix up Tutorials landing page and Tutorials left nav. * Add redirects. Fix bullet.
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Steve Perry
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k8s-ci-robot
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---
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title: Update Your App
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weight: 60
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title: Interactive Tutorial - Updating Your App
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weight: 20
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---
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<!DOCTYPE html>
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<html lang="en">
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<body>
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<link href="/docs/tutorials/kubernetes-basics/public/css/styles.css" rel="stylesheet">
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<link href="/docs/tutorials/kubernetes-basics/public/css/overrides.css" rel="stylesheet">
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<script src="https://katacoda.com/embed.js"></script>
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<div class="layout" id="top">
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<main class="content katacoda-content">
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<div class="katacoda">
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<div class="katacoda__alert">
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To interact with the Terminal, please use the desktop/tablet version
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</div>
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<div class="katacoda__box" id="inline-terminal-1" data-katacoda-id="kubernetes-bootcamp/6" data-katacoda-color="326de6" data-katacoda-secondary="273d6d" data-katacoda-hideintro="false" data-katacoda-font="Roboto" data-katacoda-fontheader="Roboto Slab" data-katacoda-prompt="Kubernetes Bootcamp Terminal" style="height: 600px;">
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</div>
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</div>
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</main>
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</div>
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</body>
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</html>
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@@ -0,0 +1,136 @@
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---
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title: Performing a Rolling Update
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weight: 10
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---
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<!DOCTYPE html>
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<html lang="en">
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<body>
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<link href="/docs/tutorials/kubernetes-basics/public/css/styles.css" rel="stylesheet">
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<div class="layout" id="top">
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<main class="content">
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<div class="row">
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<div class="col-md-8">
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<h3>Objectives</h3>
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<ul>
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<li>Perform a rolling update using kubectl.</li>
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</ul>
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</div>
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<div class="col-md-8">
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<h3>Updating an application</h3>
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<p>Users expect applications to be available all the time and developers are expected to deploy new versions of them several times a day. In Kubernetes this is done with rolling updates. <b>Rolling updates</b> allow Deployments' update to take place with zero downtime by incrementally updating Pods instances with new ones. The new Pods will be scheduled on Nodes with available resources.</p>
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<p>In the previous module we scaled our application to run multiple instances. This is a requirement for performing updates without affecting application availability. By default, the maximum number of Pods that can be unavailable during the update and the maximum number of new Pods that can be created, is one. Both options can be configured to either numbers or percentages (of Pods).
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In Kubernetes, updates are versioned and any Deployment update can be reverted to previous (stable) version.</p>
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</div>
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<div class="col-md-4">
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<div class="content__box content__box_lined">
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<h3>Summary:</h3>
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<ul>
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<li>Updating an app</li>
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</ul>
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</div>
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<div class="content__box content__box_fill">
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<p><i>Rolling updates allow Deployments' update to take place with zero downtime by incrementally updating Pods instances with new ones. </i></p>
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</div>
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</div>
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</div>
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<br>
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<div class="row">
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<div class="col-md-8">
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<h2 style="color: #3771e3;">Rolling updates overview</h2>
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</div>
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</div>
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<div class="row">
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<div class="col-md-1"></div>
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<div class="col-md-8">
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<div id="myCarousel" class="carousel" data-ride="carousel" data-interval="3000">
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<ol class="carousel-indicators">
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<li data-target="#myCarousel" data-slide-to="0" class="active"></li>
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<li data-target="#myCarousel" data-slide-to="1"></li>
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<li data-target="#myCarousel" data-slide-to="2"></li>
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<li data-target="#myCarousel" data-slide-to="3"></li>
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</ol>
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<div class="carousel-inner" role="listbox">
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<div class="item active">
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<img src="/docs/tutorials/kubernetes-basics/public/images/module_06_rollingupdates1.svg" >
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</div>
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<div class="item">
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<img src="/docs/tutorials/kubernetes-basics/public/images/module_06_rollingupdates2.svg">
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</div>
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<div class="item">
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<img src="/docs/tutorials/kubernetes-basics/public/images/module_06_rollingupdates3.svg">
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</div>
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<div class="item">
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<img src="/docs/tutorials/kubernetes-basics/public/images/module_06_rollingupdates4.svg">
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</div>
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</div>
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<a class="left carousel-control" href="#myCarousel" role="button" data-slide="prev">
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<span class="sr-only ">Previous</span>
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</a>
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<a class="right carousel-control" href="#myCarousel" role="button" data-slide="next">
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<span class="sr-only">Next</span>
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</a>
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</div>
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</div>
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</div>
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<br>
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<div class="row">
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<div class="col-md-8">
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<p>Similar to application Scaling, if a Deployment is exposed publicly, the Service will load-balance the traffic only to available Pods during the update. An available Pod is an instance that is available to the users of the application.</p>
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<p>Rolling updates allow the following actions:</p>
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<ul>
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<li>Promote an application from one environment to another (via container image updates)</li>
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<li>Rollback to previous versions</li>
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<li>Continuous Integration and Continuous Delivery of applications with zero downtime</li>
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</ul>
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</div>
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<div class="col-md-4">
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<div class="content__box content__box_fill">
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<p><i>If a Deployment is exposed publicly, the Service will load-balance the traffic only to available Pods during the update. </i></p>
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</div>
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</div>
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</div>
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<br>
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<div class="row">
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<div class="col-md-8">
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<p> In the following interactive tutorial, we'll update our application to a new version, and also perform a rollback.</p>
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</div>
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</div>
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<br>
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<div class="row">
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<div class="col-md-12">
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<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/update-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
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</div>
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</div>
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</main>
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</div>
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</body>
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</html>
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