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Signed-off-by: yupengzte <yu.peng36@zte.com.cn>
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yupengzte
2017-03-23 09:13:14 +08:00
committed by Andrew Chen
parent eaa52cf2fc
commit 8053e08125
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docs/tutorials/kubernetes-basics/cluster-interactive.html
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@@ -13,21 +13,21 @@ title: Interactive Tutorial - Creating a Cluster
<div class="layout" id="top">
<main class="content katacoda-content">
<main class="content katacoda-content">
<div class="katacoda">
<div class="katacoda__alert">
To interact with the Terminal, please use the desktop/tablet version
</div>
<div class="katacoda__box" id="inline-terminal-1" data-katacoda-id="kubernetes-bootcamp/1" 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;"></div>
</div>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/deploy-intro/" role="button">Continue to Module 2<span class="btn__next">›</span></a>
</div>
</div>
<div class="katacoda">
<div class="katacoda__alert">
To interact with the Terminal, please use the desktop/tablet version
</div>
<div class="katacoda__box" id="inline-terminal-1" data-katacoda-id="kubernetes-bootcamp/1" 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;"></div>
</div>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/deploy-intro/" role="button">Continue to Module 2<span class="btn__next">›</span></a>
</div>
</div>
</main>
</main>
</div>
docs/tutorials/kubernetes-basics/cluster-intro.html
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@@ -15,94 +15,94 @@ title: Using Minikube to Create a Cluster
<div class="layout" id="top">
<main class="content">
<main class="content">
<div class="row">
<div class="row">
<div class="col-md-8">
<h3>Objectives</h3>
<ul>
<li>Learn what a Kubernetes cluster is.</li>
<li>Learn what Minikube is.</li>
<li>Start a Kubernetes cluster using an online terminal.</li>
</ul>
</div>
<h3>Objectives</h3>
<ul>
<li>Learn what a Kubernetes cluster is.</li>
<li>Learn what Minikube is.</li>
<li>Start a Kubernetes cluster using an online terminal.</li>
</ul>
</div>
<div class="col-md-8">
<h3>Kubernetes Clusters</h3>
<p>
<b>Kubernetes coordinates a highly available cluster of computers that are connected to work as a single unit.</b> The abstractions in Kubernetes allow you to deploy containerized applications to a cluster without tying them specifically to individual machines. To make use of this new model of deployment, applications need to be packaged in a way that decouples them from individual hosts: they need to be containerized. Containerized applications are more flexible and available than in past deployment models, where applications were installed directly onto specific machines as packages deeply integrated into the host. <b>Kubernetes automates the distribution and scheduling of application containers across a cluster in a more efficient way.</b> Kubernetes is an <a href="https://github.com/kubernetes/kubernetes">open-source</a> platform and is production-ready.
</p>
<p>A Kubernetes cluster consists of two types of resources:
<ul>
<li>The <b>Master</b> coordinates the cluster</li>
<li><b>Nodes</b> are the workers that run applications</li>
</ul>
</p>
</div>
<div class="col-md-8">
<h3>Kubernetes Clusters</h3>
<p>
<b>Kubernetes coordinates a highly available cluster of computers that are connected to work as a single unit.</b> The abstractions in Kubernetes allow you to deploy containerized applications to a cluster without tying them specifically to individual machines. To make use of this new model of deployment, applications need to be packaged in a way that decouples them from individual hosts: they need to be containerized. Containerized applications are more flexible and available than in past deployment models, where applications were installed directly onto specific machines as packages deeply integrated into the host. <b>Kubernetes automates the distribution and scheduling of application containers across a cluster in a more efficient way.</b> Kubernetes is an <a href="https://github.com/kubernetes/kubernetes">open-source</a> platform and is production-ready.
</p>
<p>A Kubernetes cluster consists of two types of resources:
<ul>
<li>The <b>Master</b> coordinates the cluster</li>
<li><b>Nodes</b> are the workers that run applications</li>
</ul>
</p>
</div>
<div class="col-md-4">
<div class="content__box content__box_lined">
<h3>Summary:</h3>
<ul>
<li>Kubernetes cluster</li>
<li>Minikube</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i>
Kubernetes is a production-grade, open-source platform that orchestrates the placement (scheduling) and execution of application containers within and across computer clusters.
</i></p>
</div>
</div>
</div>
<br>
<div class="col-md-4">
<div class="content__box content__box_lined">
<h3>Summary:</h3>
<ul>
<li>Kubernetes cluster</li>
<li>Minikube</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i>
Kubernetes is a production-grade, open-source platform that orchestrates the placement (scheduling) and execution of application containers within and across computer clusters.
</i></p>
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Cluster Diagram</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Cluster Diagram</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_01_cluster.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_01_cluster.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<p><b>The Master is responsible for managing the cluster.</b> The master coordinates all activities in your cluster, such as scheduling applications, maintaining applications' desired state, scaling applications, and rolling out new updates.</p>
<p><b>A node is a VM or a physical computer that serves as a worker machine in a Kubernetes cluster.</b> Each node has a Kubelet, which is an agent for managing the node and communicating with the Kubernetes master. The node should also have tools for handling container operations, such as <a href="https://www.docker.com/">Docker</a> or <a href="https://coreos.com/rkt/">rkt</a>. A Kubernetes cluster that handles production traffic should have a minimum of three nodes.</p>
<div class="row">
<div class="col-md-8">
<p><b>The Master is responsible for managing the cluster.</b> The master coordinates all activities in your cluster, such as scheduling applications, maintaining applications' desired state, scaling applications, and rolling out new updates.</p>
<p><b>A node is a VM or a physical computer that serves as a worker machine in a Kubernetes cluster.</b> Each node has a Kubelet, which is an agent for managing the node and communicating with the Kubernetes master. The node should also have tools for handling container operations, such as <a href="https://www.docker.com/">Docker</a> or <a href="https://coreos.com/rkt/">rkt</a>. A Kubernetes cluster that handles production traffic should have a minimum of three nodes.</p>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> Masters manage the cluster and the nodes are used to host the running applications. </i></p>
</div>
</div>
</div>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> Masters manage the cluster and the nodes are used to host the running applications. </i></p>
</div>
</div>
</div>
<div class="row">
<div class="col-md-8">
<p>When you deploy applications on Kubernetes, you tell the master to start the application containers. The master schedules the containers to run on the cluster's nodes. <b>The nodes communicate with the master using the Kubernetes API</b>, which the master exposes. End users can also use the Kubernetes API directly to interact with the cluster.</p>
<div class="row">
<div class="col-md-8">
<p>When you deploy applications on Kubernetes, you tell the master to start the application containers. The master schedules the containers to run on the cluster's nodes. <b>The nodes communicate with the master using the Kubernetes API</b>, which the master exposes. End users can also use the Kubernetes API directly to interact with the cluster.</p>
<p>A Kubernetes cluster can be deployed on either physical or virtual machines. To get started with Kubernetes development, you can use <a href="https://github.com/kubernetes/minikube">Minikube</a>. Minikube is a lightweight Kubernetes implementation that creates a VM on your local machine and deploys a simple cluster containing only one node. Minikube is available for Linux, Mac OS and Windows systems. The Minikube CLI provides basic bootstrapping operations for working with your cluster, including start, stop, status, and delete. For this bootcamp, however, you'll use a provided online terminal with Minikube pre-installed.</p>
<p>A Kubernetes cluster can be deployed on either physical or virtual machines. To get started with Kubernetes development, you can use <a href="https://github.com/kubernetes/minikube">Minikube</a>. Minikube is a lightweight Kubernetes implementation that creates a VM on your local machine and deploys a simple cluster containing only one node. Minikube is available for Linux, Mac OS and Windows systems. The Minikube CLI provides basic bootstrapping operations for working with your cluster, including start, stop, status, and delete. For this bootcamp, however, you'll use a provided online terminal with Minikube pre-installed.</p>
<p>Now that you know what Kubernetes is, let's go to the online tutorial and start our first cluster!</p>
<p>Now that you know what Kubernetes is, let's go to the online tutorial and start our first cluster!</p>
</div>
</div>
<br>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/cluster-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
</div>
</div>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/cluster-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
</div>
</div>
</main>
</main>
</div>
docs/tutorials/kubernetes-basics/deploy-interactive.html
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@@ -13,25 +13,25 @@ title: Interactive Tutorial - Deploying an App
<div class="layout" id="top">
<main class="content katacoda-content">
<main class="content katacoda-content">
<br>
<div class="katacoda">
<div class="katacoda__alert">
To interact with the Terminal, please use the desktop/tablet version
</div>
<br>
<div class="katacoda">
<div class="katacoda__alert">
To interact with the Terminal, please use the desktop/tablet version
</div>
<div class="katacoda__box" id="inline-terminal-1" data-katacoda-id="kubernetes-bootcamp/7" 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;">
</div>
<div class="katacoda__box" id="inline-terminal-1" data-katacoda-id="kubernetes-bootcamp/7" 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;">
</div>
</div>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/explore-intro/" role="button">Continue to Module 3<span class="btn__next">›</span></a>
</div>
</div>
</div>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/explore-intro/" role="button">Continue to Module 3<span class="btn__next">›</span></a>
</div>
</div>
</main>
</main>
</div>
docs/tutorials/kubernetes-basics/deploy-intro.html
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@@ -12,95 +12,95 @@ title: Using kubectl to Create a Deployment
<div class="layout" id="top">
<main class="content">
<main class="content">
<div class="row">
<div class="row">
<div class="col-md-8">
<h3>Objectives</h3>
<ul>
<li>Learn about application Deployments.</li>
<li>Deploy your first app on Kubernetes with kubectl.</li>
</ul>
</div>
<div class="col-md-8">
<h3>Objectives</h3>
<ul>
<li>Learn about application Deployments.</li>
<li>Deploy your first app on Kubernetes with kubectl.</li>
</ul>
</div>
<div class="col-md-8">
<h3>Kubernetes Deployments</h3>
<p>
Once you have a running Kubernetes cluster, you can deploy your containerized applications on top of it. To do so, you create a Kubernetes <b>Deployment</b>. The Deployment is responsible for creating and updating instances of your application. Once you've created a Deployment, the Kubernetes master schedules the application instances that the Deployment creates onto individual Nodes in the cluster.
</p>
<div class="col-md-8">
<h3>Kubernetes Deployments</h3>
<p>
Once you have a running Kubernetes cluster, you can deploy your containerized applications on top of it. To do so, you create a Kubernetes <b>Deployment</b>. The Deployment is responsible for creating and updating instances of your application. Once you've created a Deployment, the Kubernetes master schedules the application instances that the Deployment creates onto individual Nodes in the cluster.
</p>
<p>Once the application instances are created, a Kubernetes Deployment Controller continuously monitors those instances. The Deployment controller replaces an instance if the Node hosting it goes down or it is deleted. <b>This provides a self-healing mechanism to address machine failure or maintenance.</b></p>
<p>Once the application instances are created, a Kubernetes Deployment Controller continuously monitors those instances. The Deployment controller replaces an instance if the Node hosting it goes down or it is deleted. <b>This provides a self-healing mechanism to address machine failure or maintenance.</b></p>
<p>In a pre-orchestration world, installation scripts would often be used to start applications, but they did not allow recovery from machine failure. By both creating your application instances and keeping them running across Nodes, Kubernetes Deployments provide a fundamentally different approach to application management. </p>
<p>In a pre-orchestration world, installation scripts would often be used to start applications, but they did not allow recovery from machine failure. By both creating your application instances and keeping them running across Nodes, Kubernetes Deployments provide a fundamentally different approach to application management. </p>
</div>
</div>
<div class="col-md-4">
<div class="content__box content__box_lined">
<h3>Summary:</h3>
<ul>
<li>Deployments</li>
<li>Kubectl</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i>
A Deployment is responsible for creating and updating instances of your application
</i></p>
</div>
</div>
</div>
<br>
<div class="col-md-4">
<div class="content__box content__box_lined">
<h3>Summary:</h3>
<ul>
<li>Deployments</li>
<li>Kubectl</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i>
A Deployment is responsible for creating and updating instances of your application
</i></p>
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Deploying your first app on Kubernetes</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Deploying your first app on Kubernetes</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_02_first_app.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_02_first_app.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<div class="row">
<div class="col-md-8">
<p>You can create and manage a Deployment by using the Kubernetes command line interface, <b>Kubectl</b>. Kubectl uses the Kubernetes API to interact with the cluster. In this module, you'll learn the most common Kubectl commands needed to create Deployments that run your applications on a Kubernetes cluster.</p>
<p>When you create a Deployment, you'll need to specify the container image for your application and the number of replicas that you want to run. You can change that information later by updating your Deployment; Modules <a href="/docs/tutorials/kubernetes-basics/scale-intro/">5</a> and <a href="/docs/tutorials/kubernetes-basics/update-intro/">6</a> of the bootcamp discuss how you can scale and update your Deployments.</p>
<p>When you create a Deployment, you'll need to specify the container image for your application and the number of replicas that you want to run. You can change that information later by updating your Deployment; Modules <a href="/docs/tutorials/kubernetes-basics/scale-intro/">5</a> and <a href="/docs/tutorials/kubernetes-basics/update-intro/">6</a> of the bootcamp discuss how you can scale and update your Deployments.</p>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> Applications need to be packaged into one of the supported container formats in order to be deployed on Kubernetes </i></p>
</div>
</div>
</div>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> Applications need to be packaged into one of the supported container formats in order to be deployed on Kubernetes </i></p>
</div>
</div>
</div>
<div class="row">
<div class="col-md-8">
<p>For our first Deployment, we'll use a <a href="https://nodejs.org">Node.js</a> application packaged in a Docker container. The source code and the Dockerfile are available in the <a href="https://github.com/kubernetes/kubernetes-bootcamp">GitHub repository</a> for the Kubernetes Bootcamp.</p>
<div class="row">
<div class="col-md-8">
<p>For our first Deployment, we'll use a <a href="https://nodejs.org">Node.js</a> application packaged in a Docker container. The source code and the Dockerfile are available in the <a href="https://github.com/kubernetes/kubernetes-bootcamp">GitHub repository</a> for the Kubernetes Bootcamp.</p>
<p>Now that you know what Deployments are, let's go to the online tutorial and deploy our first app!</p>
<p>Now that you know what Deployments are, let's go to the online tutorial and deploy our first app!</p>
</div>
</div>
<br>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/deploy-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
</div>
</div>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/deploy-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
</div>
</div>
</main>
</main>
</div>
docs/tutorials/kubernetes-basics/explore-interactive.html
+15 -15
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@@ -13,25 +13,25 @@ title: Interactive Tutorial - Exploring Your App
<div class="layout" id="top">
<main class="content katacoda-content">
<main class="content katacoda-content">
<br>
<div class="katacoda">
<br>
<div class="katacoda">
<div class="katacoda__alert">
To interact with the Terminal, please use the desktop/tablet version
</div>
<div class="katacoda__alert">
To interact with the Terminal, please use the desktop/tablet version
</div>
<div class="katacoda__box" id="inline-terminal-1" data-katacoda-id="kubernetes-bootcamp/4" 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;">
</div>
</div>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/expose-intro/" role="button">Continue to Module 4<span class="btn__next">›</span></a>
</div>
</div>
<div class="katacoda__box" id="inline-terminal-1" data-katacoda-id="kubernetes-bootcamp/4" 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;">
</div>
</div>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/expose-intro/" role="button">Continue to Module 4<span class="btn__next">›</span></a>
</div>
</div>
</main>
</main>
</div>
docs/tutorials/kubernetes-basics/explore-intro.html
+102 -102
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@@ -13,128 +13,128 @@ title: Viewing Pods and Nodes
<div class="layout" id="top">
<main class="content">
<main class="content">
<div class="row">
<div class="row">
<div class="col-md-8">
<h3>Objectives</h3>
<ul>
<li>Learn about Kubernetes Pods.</li>
<li>Learn about Kubernetes Nodes.</li>
<li>Troubleshoot deployed applications.</li>
</ul>
</div>
<h3>Objectives</h3>
<ul>
<li>Learn about Kubernetes Pods.</li>
<li>Learn about Kubernetes Nodes.</li>
<li>Troubleshoot deployed applications.</li>
</ul>
</div>
<div class="col-md-8">
<h2>Kubernetes Pods</h2>
<p>When you created a Deployment in Module <a href="/docs/tutorials/kubernetes-basics/deploy-intro/">2</a>, Kubernetes created a <b>Pod</b> to host your application instance. A Pod is a Kubernetes abstraction that represents a group of one or more application containers (such as Docker or rkt), and some shared resources for those containers. Those resources include:</p>
<ul>
<li>Shared storage, as Volumes</li>
<li>Networking, as a unique cluster IP address</li>
<li>Information about how to run each container, such as the container image version or specific ports to use</li>
</ul>
<p>A Pod models an application-specific "logical host" and can contain different application containers which are relatively tightly coupled. For example, a Pod might include both the container with your Node.js app as well as a different container that feeds the data to be published by the Node.js webserver. The containers in a Pod share an IP Address and port space, are always co-located and co-scheduled, and run in a shared context on the same Node.</p>
<div class="col-md-8">
<h2>Kubernetes Pods</h2>
<p>When you created a Deployment in Module <a href="/docs/tutorials/kubernetes-basics/deploy-intro/">2</a>, Kubernetes created a <b>Pod</b> to host your application instance. A Pod is a Kubernetes abstraction that represents a group of one or more application containers (such as Docker or rkt), and some shared resources for those containers. Those resources include:</p>
<ul>
<li>Shared storage, as Volumes</li>
<li>Networking, as a unique cluster IP address</li>
<li>Information about how to run each container, such as the container image version or specific ports to use</li>
</ul>
<p>A Pod models an application-specific "logical host" and can contain different application containers which are relatively tightly coupled. For example, a Pod might include both the container with your Node.js app as well as a different container that feeds the data to be published by the Node.js webserver. The containers in a Pod share an IP Address and port space, are always co-located and co-scheduled, and run in a shared context on the same Node.</p>
<p>Pods are the atomic unit on the Kubernetes platform. When we create a Deployment on Kubernetes, that Deployment creates Pods with containers inside them (as opposed to creating containers directly). Each Pod is tied to the Node where it is scheduled, and remains there until termination (according to restart policy) or deletion. In case of a Node failure, identical Pods are scheduled on other available Nodes in the cluster.</p>
<p>Pods are the atomic unit on the Kubernetes platform. When we create a Deployment on Kubernetes, that Deployment creates Pods with containers inside them (as opposed to creating containers directly). Each Pod is tied to the Node where it is scheduled, and remains there until termination (according to restart policy) or deletion. In case of a Node failure, identical Pods are scheduled on other available Nodes in the cluster.</p>
</div>
<div class="col-md-4">
<div class="content__box content__box_lined">
<h3>Summary:</h3>
<ul>
<li>Pods</li>
<li>Nodes</li>
<li>Kubectl main commands</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i>
A Pod is a group of one or more application containers (such as Docker or rkt) and includes shared storage (volumes), IP address and information about how to run them.
</i></p>
</div>
</div>
</div>
<br>
</div>
<div class="col-md-4">
<div class="content__box content__box_lined">
<h3>Summary:</h3>
<ul>
<li>Pods</li>
<li>Nodes</li>
<li>Kubectl main commands</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i>
A Pod is a group of one or more application containers (such as Docker or rkt) and includes shared storage (volumes), IP address and information about how to run them.
</i></p>
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Pods overview</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Pods overview</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_03_pods.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_03_pods.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<h2>Nodes</h2>
<p>A Pod always runs on a <b>Node</b>. A Node is a worker machine in Kubernetes and may be either a virtual or a physical machine, depending on the cluster. Each Node is managed by the Master. A Node can have multiple pods, and the Kubernetes master automatically handles scheduling the pods across the Nodes in the cluster. The Master's automatic scheduling takes into account the available resources on each Node.</p>
<div class="row">
<div class="col-md-8">
<h2>Nodes</h2>
<p>A Pod always runs on a <b>Node</b>. A Node is a worker machine in Kubernetes and may be either a virtual or a physical machine, depending on the cluster. Each Node is managed by the Master. A Node can have multiple pods, and the Kubernetes master automatically handles scheduling the pods across the Nodes in the cluster. The Master's automatic scheduling takes into account the available resources on each Node.</p>
<p>Every Kubernetes Node runs at least:</p>
<ul>
<li>Kubelet, a process responsible for communication between the Kubernetes Master and the Nodes; it manages the Pods and the containers running on a machine.</li>
<li>A container runtime (like Docker, rkt) responsible for pulling the container image from a registry, unpacking the container, and running the application.</li>
</ul>
<p>Every Kubernetes Node runs at least:</p>
<ul>
<li>Kubelet, a process responsible for communication between the Kubernetes Master and the Nodes; it manages the Pods and the containers running on a machine.</li>
<li>A container runtime (like Docker, rkt) responsible for pulling the container image from a registry, unpacking the container, and running the application.</li>
</ul>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> Containers should only be scheduled together in a single Pod if they are tightly coupled and need to share resources such as disk. </i></p>
</div>
</div>
</div>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> Containers should only be scheduled together in a single Pod if they are tightly coupled and need to share resources such as disk. </i></p>
</div>
</div>
</div>
<br>
<br>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Node overview</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Node overview</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_03_nodes.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_03_nodes.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<h2>Troubleshooting with kubectl</h2>
<p>In Module <a href="/docs/tutorials/kubernetes-basics/deploy-intro/">2</a>, you used Kubectl command-line interface. You'll continue to use it in Module 3 to get information about deployed applications and their environments. The most common operations can be done with the following kubectl commands:</p>
<ul>
<li><b>kubectl get</b> - list resources</li>
<li><b>kubectl describe</b> - show detailed information about a resource</li>
<li><b>kubectl logs</b> - print the logs from a container in a pod</li>
<li><b>kubectl exec</b> - execute a command on a container in a pod</li>
</ul>
<div class="row">
<div class="col-md-8">
<h2>Troubleshooting with kubectl</h2>
<p>In Module <a href="/docs/tutorials/kubernetes-basics/deploy-intro/">2</a>, you used Kubectl command-line interface. You'll continue to use it in Module 3 to get information about deployed applications and their environments. The most common operations can be done with the following kubectl commands:</p>
<ul>
<li><b>kubectl get</b> - list resources</li>
<li><b>kubectl describe</b> - show detailed information about a resource</li>
<li><b>kubectl logs</b> - print the logs from a container in a pod</li>
<li><b>kubectl exec</b> - execute a command on a container in a pod</li>
</ul>
<p>You can use these commands to see when applications were deployed, what their current statuses are, where they are running and what their configurations are.</p>
<p>You can use these commands to see when applications were deployed, what their current statuses are, where they are running and what their configurations are.</p>
<p>Now that we know more about our cluster components and the command line, let's explore our application.</p>
<p>Now that we know more about our cluster components and the command line, let's explore our application.</p>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> A node is a worker machine in Kubernetes and may be a VM or physical machine, depending on the cluster. Multiple Pods can run on one Node. </i></p>
</div>
</div>
</div>
<br>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> A node is a worker machine in Kubernetes and may be a VM or physical machine, depending on the cluster. Multiple Pods can run on one Node. </i></p>
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/explore-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
</div>
</div>
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<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/explore-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
</div>
</div>
</main>
</main>
</div>
docs/tutorials/kubernetes-basics/expose-interactive.html
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@@ -13,22 +13,22 @@ title: Interactive Tutorial - Exposing Your App
<div class="layout" id="top">
<main class="content katacoda-content">
<main class="content katacoda-content">
<div class="katacoda">
<div class="katacoda__alert">
To interact with the Terminal, please use the desktop/tablet version
</div>
<div class="katacoda__box" id="inline-terminal-1" data-katacoda-id="kubernetes-bootcamp/8" 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;">
</div>
</div>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/scale-intro/" role="button">Continue to Module 5<span class="btn__next">›</span></a>
</div>
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To interact with the Terminal, please use the desktop/tablet version
</div>
<div class="katacoda__box" id="inline-terminal-1" data-katacoda-id="kubernetes-bootcamp/8" 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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<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/scale-intro/" role="button">Continue to Module 5<span class="btn__next">›</span></a>
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</main>
</div>
docs/tutorials/kubernetes-basics/expose-intro.html
+100 -100
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@@ -12,125 +12,125 @@ title: Using a Service to Expose Your App
<div class="layout" id="top">
<main class="content">
<main class="content">
<div class="row">
<div class="row">
<div class="col-md-8">
<h3>Objectives</h3>
<ul>
<li>Learn about Kubernetes Services.</li>
<li>Learn about Kubernetes Labels.</li>
<li>Expose an application outside Kubernetes.</li>
</ul>
</div>
<h3>Objectives</h3>
<ul>
<li>Learn about Kubernetes Services.</li>
<li>Learn about Kubernetes Labels.</li>
<li>Expose an application outside Kubernetes.</li>
</ul>
</div>
<div class="col-md-8">
<h3>Kubernetes Services</h3>
<div class="col-md-8">
<h3>Kubernetes Services</h3>
<p>While Pods do have their own unique IP across the cluster, those IPs are not exposed outside Kubernetes. Taking into account that over time Pods may be terminated, deleted or replaced by other Pods, we need a way to let other Pods and applications automatically discover each other. Kubernetes addresses this by grouping Pods in Services. A Kubernetes <b>Service</b> is an abstraction layer which defines a logical set of Pods and enables external traffic exposure, load balancing and service discovery for those Pods.</p>
<p>While Pods do have their own unique IP across the cluster, those IPs are not exposed outside Kubernetes. Taking into account that over time Pods may be terminated, deleted or replaced by other Pods, we need a way to let other Pods and applications automatically discover each other. Kubernetes addresses this by grouping Pods in Services. A Kubernetes <b>Service</b> is an abstraction layer which defines a logical set of Pods and enables external traffic exposure, load balancing and service discovery for those Pods.</p>
<p>This abstraction will allow us to expose Pods to traffic originating from outside the cluster. Services have their own unique cluster-private IP address and expose a port to receive traffic. If you choose to expose the service outside the cluster, the options are:</p>
<ul>
<li>LoadBalancer - provides a public IP address (what you would typically use when you run Kubernetes on GCP or AWS)</li>
<li>NodePort - exposes the Service on the same port on each Node of the cluster using NAT (available on all Kubernetes clusters, and in Minikube)</li>
</ul>
</div>
<div class="col-md-4">
<div class="content__box content__box_lined">
<h3>Summary:</h3>
<ul>
<li>Exposing Pods to external traffic</li>
<li>Load balancing traffic across multiple Pods</li>
<li>Using labels</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i>
A Kubernetes Service is an abstraction layer which defines a logical set of Pods and enables external traffic exposure, load balancing and service discovery for those Pods.
</i></p>
</div>
</div>
</div>
<br>
<p>This abstraction will allow us to expose Pods to traffic originating from outside the cluster. Services have their own unique cluster-private IP address and expose a port to receive traffic. If you choose to expose the service outside the cluster, the options are:</p>
<ul>
<li>LoadBalancer - provides a public IP address (what you would typically use when you run Kubernetes on GCP or AWS)</li>
<li>NodePort - exposes the Service on the same port on each Node of the cluster using NAT (available on all Kubernetes clusters, and in Minikube)</li>
</ul>
</div>
<div class="col-md-4">
<div class="content__box content__box_lined">
<h3>Summary:</h3>
<ul>
<li>Exposing Pods to external traffic</li>
<li>Load balancing traffic across multiple Pods</li>
<li>Using labels</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i>
A Kubernetes Service is an abstraction layer which defines a logical set of Pods and enables external traffic exposure, load balancing and service discovery for those Pods.
</i></p>
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Services overview</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Services overview</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_04_services.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_04_services.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<div class="row">
<div class="col-md-8">
<p>A Service provides load balancing of traffic across the contained set of Pods. This is useful when a service is created to group all Pods from a specific Deployment (our application will make use of this in the next module, when we'll have multiple instances running).</p>
<p>A Service provides load balancing of traffic across the contained set of Pods. This is useful when a service is created to group all Pods from a specific Deployment (our application will make use of this in the next module, when we'll have multiple instances running).</p>
<p>Services are also responsible for service-discovery within the cluster (covered in <a href="/docs/user-guide/connecting-applications/#accessing-the-service">Accessing the Service</a>). This will for example allow a frontend service (like a web server) to receive traffic from a backend service (like a database) without worrying about Pods.</p>
<p>Services are also responsible for service-discovery within the cluster (covered in <a href="/docs/user-guide/connecting-applications/#accessing-the-service">Accessing the Service</a>). This will for example allow a frontend service (like a web server) to receive traffic from a backend service (like a database) without worrying about Pods.</p>
<p>Services match a set of Pods using Label Selectors, a grouping primitive that allows logical operation on Labels.</p>
<p>Services match a set of Pods using Label Selectors, a grouping primitive that allows logical operation on Labels.</p>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> You can create a Service when you start a Deployment by adding --expose as a parameter for the kubectl run command </i></p>
</div>
</div>
</div>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> You can create a Service when you start a Deployment by adding --expose as a parameter for the kubectl run command </i></p>
</div>
</div>
</div>
<br>
<br>
<div class="row">
<div class="col-md-8">
<p><b>Labels</b> are key/value pairs that are attached to objects, such as Pods and you can think of them as hashtags from social media. They are used to organize related objects in a way meaningful to the users like:</p>
<ul>
<li>Production environment (production, test, dev)</li>
<li>Application version (beta, v1.3)</li>
<li>Type of service/server (frontend, backend, database)</li>
</ul>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> Labels are key/value pairs that are attached to objects </i></p>
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Labels</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<p><b>Labels</b> are key/value pairs that are attached to objects, such as Pods and you can think of them as hashtags from social media. They are used to organize related objects in a way meaningful to the users like:</p>
<ul>
<li>Production environment (production, test, dev)</li>
<li>Application version (beta, v1.3)</li>
<li>Type of service/server (frontend, backend, database)</li>
</ul>
</div>
<div class="col-md-4">
<div class="content__box content__box_fill">
<p><i> Labels are key/value pairs that are attached to objects </i></p>
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Labels</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_04_labels.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<div class="row">
<div class="col-md-8">
<p><img src="/docs/tutorials/kubernetes-basics/public/images/module_04_labels.svg"></p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<p>Labels can be attached to objects at the creation time or later and can be modified at any time.
The kubectl run command sets some default Labels/Label Selectors on the new Pods/ Deployment. The link between Labels and Label Selectors defines the relationship between the Deployment and the Pods it creates.</p>
<p>Labels can be attached to objects at the creation time or later and can be modified at any time.
The kubectl run command sets some default Labels/Label Selectors on the new Pods/ Deployment. The link between Labels and Label Selectors defines the relationship between the Deployment and the Pods it creates.</p>
<p>Now let's expose our application with the help of a Service, and apply some new Labels.</p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/expose-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
</div>
</div>
<p>Now let's expose our application with the help of a Service, and apply some new Labels.</p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/expose-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
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</main>
</div>
docs/tutorials/kubernetes-basics/scale-interactive.html
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@@ -13,22 +13,22 @@ title: Interactive Tutorial - Scaling Your App
<div class="layout" id="top">
<main class="content katacoda-content">
<main class="content katacoda-content">
<div class="katacoda">
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To interact with the Terminal, please use the desktop/tablet version
</div>
<div class="katacoda__box" id="inline-terminal-1" data-katacoda-id="kubernetes-bootcamp/5" 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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<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/update-intro/" role="button">Continue to Module 6<span class="btn__next">›</span></a>
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<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/update-intro/" role="button">Continue to Module 6<span class="btn__next">›</span></a>
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docs/tutorials/kubernetes-basics/scale-intro.html
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@@ -12,107 +12,107 @@ title: Running Multiple Instances of Your App
<div class="layout" id="top">
<main class="content">
<main class="content">
<div class="row">
<div class="row">
<div class="col-md-8">
<h3>Objectives</h3>
<ul>
<li>Scale an app using kubectl.</li>
</ul>
</div>
<h3>Objectives</h3>
<ul>
<li>Scale an app using kubectl.</li>
</ul>
</div>
<div class="col-md-8">
<div class="col-md-8">
<h3>Scaling an application</h3>
<p>In the previous modules we created a <a href="http://kubernetes.io/docs/user-guide/deployments/"> Deployment</a>, and then exposed it publicly via a <a href="http://kubernetes.io/docs/user-guide/services/">Service</a>. The Deployment created only one Pod for running our application. When traffic increases, we will need to scale the application to keep up with user demand.</p>
<p>In the previous modules we created a <a href="http://kubernetes.io/docs/user-guide/deployments/"> Deployment</a>, and then exposed it publicly via a <a href="http://kubernetes.io/docs/user-guide/services/">Service</a>. The Deployment created only one Pod for running our application. When traffic increases, we will need to scale the application to keep up with user demand.</p>
<p><b>Scaling</b> is accomplished by changing the number of replicas in a Deployment</p>
<p><b>Scaling</b> is accomplished by changing the number of replicas in a Deployment</p>
</div>
<div class="col-md-4">
<div class="content__box content__box_lined">
<h3>Summary:</h3>
<ul>
<li>Scaling a Deployment</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i> You can create from the start a Deployment with multiple instances using the --replicas parameter for the kubectl run command </i></p>
</div>
</div>
</div>
<br>
</div>
<div class="col-md-4">
<div class="content__box content__box_lined">
<h3>Summary:</h3>
<ul>
<li>Scaling a Deployment</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i> You can create from the start a Deployment with multiple instances using the --replicas parameter for the kubectl run command </i></p>
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Scaling overview</h2>
</div>
</div>
<div class="row">
<div class="col-md-8">
<h2 style="color: #3771e3;">Scaling overview</h2>
</div>
</div>
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<div class="row">
<div class="col-md-8">
<p>Scaling up a Deployment will ensure new Pods are created and scheduled to Nodes with available resources. Scaling down will reduce the number of Pods to the new desired state. Kubernetes also supports <a href="http://kubernetes.io/docs/user-guide/horizontal-pod-autoscaling/"> autoscaling </a> of Pods, but it is outside of the scope of this tutorial. Scaling to zero is also possible, and it will terminate all Pods of the specified Deployment.</p>
<p>Scaling up a Deployment will ensure new Pods are created and scheduled to Nodes with available resources. Scaling down will reduce the number of Pods to the new desired state. Kubernetes also supports <a href="http://kubernetes.io/docs/user-guide/horizontal-pod-autoscaling/"> autoscaling </a> of Pods, but it is outside of the scope of this tutorial. Scaling to zero is also possible, and it will terminate all Pods of the specified Deployment.</p>
<p>Running multiple instances of an application will require a way to distribute the traffic to all of them. Services have an integrated load-balancer that will distribute network traffic to all Pods of an exposed Deployment. Services will monitor continuously the running Pods using endpoints, to ensure the traffic is sent only to available Pods.</p>
<p>Running multiple instances of an application will require a way to distribute the traffic to all of them. Services have an integrated load-balancer that will distribute network traffic to all Pods of an exposed Deployment. Services will monitor continuously the running Pods using endpoints, to ensure the traffic is sent only to available Pods.</p>
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<p><i>Scaling is accomplished by changing the number of replicas in a Deployment.</i></p>
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<p><i>Scaling is accomplished by changing the number of replicas in a Deployment.</i></p>
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<br>
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<p> Once you have multiple instances of an Application running, you would be able to do Rolling updates without downtime. We'll cover that in the next module. Now, let's go to the online terminal and scale our application.</p>
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<br>
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<p> Once you have multiple instances of an Application running, you would be able to do Rolling updates without downtime. We'll cover that in the next module. Now, let's go to the online terminal and scale our application.</p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/scale-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
</div>
</div>
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<a class="btn btn-lg btn-success" href="/docs/tutorials/kubernetes-basics/scale-interactive/" role="button">Start Interactive Tutorial <span class="btn__next">›</span></a>
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docs/tutorials/kubernetes-basics/update-interactive.html
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To interact with the Terminal, please use the desktop/tablet version
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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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To interact with the Terminal, please use the desktop/tablet version
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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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docs/tutorials/kubernetes-basics/update-intro.html
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<h3>Objectives</h3>
<ul>
<li>Perform a rolling update using kubectl.</li>
</ul>
</div>
<h3>Objectives</h3>
<ul>
<li>Perform a rolling update using kubectl.</li>
</ul>
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<h3>Updating an application</h3>
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<h3>Updating an application</h3>
<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>
<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>
<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).
In Kubernetes, updates are versioned and any Deployment update can be reverted to previous (stable) version.</p>
<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).
In Kubernetes, updates are versioned and any Deployment update can be reverted to previous (stable) version.</p>
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<h3>Summary:</h3>
<ul>
<li>Updating an app</li>
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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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<h3>Summary:</h3>
<ul>
<li>Updating an app</li>
</ul>
</div>
<div class="content__box content__box_fill">
<p><i>Rolling updates allow Deployments' update to take place with zero downtime by incrementally updating Pods instances with new ones. </i></p>
</div>
</div>
</div>
<br>
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<h2 style="color: #3771e3;">Rolling updates overview</h2>
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<h2 style="color: #3771e3;">Rolling updates overview</h2>
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<span class="sr-only ">Previous</span>
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<span class="sr-only">Next</span>
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<span class="sr-only ">Previous</span>
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<span class="sr-only">Next</span>
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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>
<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>
<p>Rolling updates allow the following actions:</p>
<ul>
<li>Promote an application from one environment to another (via container image updates)</li>
<li>Rollback to previous versions</li>
<li>Continuous Integration and Continuous Delivery of applications with zero downtime</li>
<p>Rolling updates allow the following actions:</p>
<ul>
<li>Promote an application from one environment to another (via container image updates)</li>
<li>Rollback to previous versions</li>
<li>Continuous Integration and Continuous Delivery of applications with zero downtime</li>
</ul>
</ul>
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<div class="col-md-4">
<div class="content__box content__box_fill">
<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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<p><i>If a Deployment is exposed publicly, the Service will load-balance the traffic only to available Pods during the update. </i></p>
</div>
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<br>
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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>
</div>
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<br>
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<div class="col-md-8">
<p> In the following interactive tutorial we'll update our application to a new version, and also perform a rollback.</p>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
<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>
</div>
</div>
<div class="row">
<div class="col-md-12">
<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>
</div>
</div>
</main>
</main>
</div>