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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Demo: Kubernetes Basics</title>
<meta name="description" content="A demo of a Kubernetes app to illustrate core concepts">
<meta name="author" content="Matt Boersma">
<meta name="apple-mobile-web-app-capable" content="yes">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
<link rel="stylesheet" href="revealjs/css/reveal.css">
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var link = document.createElement( 'link' );
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</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<h1>Demo</h1>
<h3>Kubernetes Basics</h3>
<p>
<small>by Matt Boersma - [email protected]</small><br />
<small>thanks to Gerred Dillon, Jason Hansen, and Kelsey Hightower!</small>
</p>
</section>
<section>
<h2>Kubernetes Is</h2>
<blockquote cite="http://kubernetes.io/v1.1/docs/user-guide/overview.html">
“Kubernetes is an open-source system for managing containerized applications across multiple hosts in a cluster.
Kubernetes provides mechanisms for application deployment, scheduling, updating, maintenance, and scaling.”
</blockquote>
</section>
<section>
<h2>Kubernetes Is</h2>
<p>
<pre><code class="bash" data-trim contenteditable>
$ kubectl
kubectl controls the Kubernetes cluster manager.
Find more information at https://github.com/kubernetes/kubernetes.
Usage:
kubectl [flags]
kubectl [command]
Available Commands:
get Display one or many resources
describe Show details of a specific resource or group of resources
create Create a resource by filename or stdin
...
</code></pre>
</p>
</section>
<section>
<h2>Kelsey's K8S Kore Koncepts</h2>
<p>
<ul>
<li>Containers</li>
<li>Nodes</li>
<li>Pods</li>
<li>Labels</li>
<li>Services</li>
</ul>
</p>
</section>
<section>
<h2>Containers</h2>
<p>
<ul>
<li>Unix processes, *NOT* VMs</li>
<li>Application + dependencies = image</li>
<li>Runtime environment (cgroups, namespaces, env vars)</li>
</ul>
<pre><code class="bash" data-trim contenteditable>
FROM alpine:3.3
# install common packages
RUN apk add --update-cache curl bash openssl sudo && rm -rf /var/cache/apk/*
# install etcdctl and confd
RUN apk add --update-cache curl tar \
&& curl -sSL https://github.com/coreos/etcd/releases/download/v2.2.1/etcd-v2.2.1-linux-amd64.tar.gz \
| tar -vxz -C /usr/local/bin --strip=1 etcd-v2.2.1-linux-amd64/etcdctl \
&& chown root:root /usr/local/bin/etcdctl \
&& curl -sSL -o /usr/local/bin/confd https://github.com/kelseyhightower/confd/releases/download/v0.10.0/confd-0.10.0-linux-amd64 \
&& chmod +x /usr/local/bin/confd
# define execution environment
CMD ["/app/bin/boot"]
EXPOSE 8000
</code></pre>
</p>
</section>
<section>
<h2>Node</h2>
<p>Runs containers and proxies service requests.<br />
Supporting processes:
<ul>
<li>docker</li>
<li>kubelet</li>
<li>proxy</li>
</ul>
</p>
</section>
<section>
<h2>Pod</h2>
<p>Represents a logical application.
<ul>
<li>One or more containers</li>
<li>Shared namespace</li>
</ul>
</p>
</section>
<section>
<h2>Replication Controller</h2>
<p>Manages a replicated set of pods<br />
<ul>
<li>Creates pods from a template</li>
<li>Makes sure the desired number of pods are running</li>
<li>Self-healing</li>
</ul>
</p>
</section>
<section>
<h2>Service</h2>
<p>Service discovery for pods.<br />
<ul>
<li>Proxy runs on each node</li>
<li>Virtual IP per service (no port collisions)</li>
<li>Basic round-robin algorithm</li>
<li>Dynamic backends based on label queries</li>
</ul>
</p>
</section>
<section>
<h2>K8S Runs Everywhere</h2>
<p></p>
</section>
<section>
<h2>Demo: Create a Vagrant Cluster</h2>
<script type="text/javascript" src="https://asciinema.org/a/34188.js" id="asciicast-34188" data-size="medium" data-theme="monokai" async></script>
</section>
<section>
<h2>Demo: Install and Scale an RC</h2>
<script type="text/javascript" src="https://asciinema.org/a/34277.js" id="asciicast-34277" data-size="medium" data-theme="monokai" async></script>
</section>
<section>
<h2>Demo: Install Deis v2 alpha</h2>
<script type="text/javascript" src="https://asciinema.org/a/34276.js" id="asciicast-34276" data-size="medium" data-theme="monokai" async></script>
<p></p>
</section>
</div>
</div>
<script src="revealjs/lib/js/head.min.js"></script>
<script src="revealjs/js/reveal.js"></script>
<script>
// Full list of configuration options available at:
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