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<!DOCTYPE html>
<html>
<head>
<title>Teaching Chef</title>
<meta charset='utf-8'>
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</head>
<body class='deck-container keydown'>
<section class='slide'>
<div class='spacer top'></div>
<div class='content'>
<h1>Chef</h1>
<h2><a href="mailto:[email protected]">[email protected]</a></h2>
</div>
<div class='spacer bottom'></div>
</section>
<section class='left slide'>
<div class='spacer top'></div>
<div class='content'>
<h1>The Framework</h1>
<h3>Chef vs Chef-Solo</h3>
<ul>
<li>Chef-Solo runs on the local machine and requires dependencies to be on that machine</li>
<li>Chef has a server and nodes
<ul>
<li>the server contains dependencies and instructions</li>
<li>the node communicates with the server to configure itself</li>
</ul></li>
</ul>
<p>I don't know much about Chef-Solo.</p>
</div>
<div class='spacer bottom'></div>
</section>
<section class='left slide'>
<div class='spacer top'></div>
<div class='content'>
<h1>The Framework</h1>
<h3>Chef Server</h3>
<ul>
<li>stores data needed for the chef run (more on this later)</li>
<li>has a web UI</li>
<li>indexes data about nodes for searching</li>
</ul>
<h3>Two options:</h3>
<h4>Hosted Chef</h4>
<ul>
<li>pay OpsWorks to provide the Chef server</li>
<li>support</li>
</ul>
<h4>Open Source Chef</h4>
<ul>
<li>build your own server</li>
<li>no support, but also no boundaries</li>
</ul>
</div>
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</section>
<section class='left slide'>
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<div class='content'>
<h1>The Guts</h1>
<p>Basically two components: the Chef Repo and Cookbooks</p>
<h3>Chef Repo</h3>
<ul>
<li>analogous to a rails app; it's the driver of your infrastructure
<ul>
<li>knife gem for operating on the chef server</li>
<li>cucumber-chef gem for BDD</li>
</ul></li>
</ul>
<h3>Cookbooks</h3>
<ul>
<li>analogous to a gem, but more integral
<ul>
<li>contains the code necessary to accomplish some specific goal (e.g. install monit, or update the apt-cache)</li>
</ul></li>
</ul>
</div>
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</section>
<section class='left slide'>
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<div class='content'>
<h1>Initial setup</h1>
<ol>
<li>Init the chef-repo
<ul>
<li><a href="https://github.com/opscode/chef-repo">https://github.com/opscode/chef-repo</a></li>
</ul></li>
<li>Set up the chef server
<ul>
<li><a href="http://docs.opscode.com/install_server.html">http://docs.opscode.com/install_server.html</a></li>
</ul></li>
<li>Connect your chef repository to the server
<ul>
<li><a href="http://docs.opscode.com/chef/install_workstation.html">http://docs.opscode.com/chef/install_workstation.html</a></li>
</ul></li>
<li>Make your first cookbook
<ul>
<li>TDD it using <a href="https://github.com/acrmp/chefspec/">ChefSpec</a></li>
</ul></li>
<li>Use it in your chef-repo
<ul>
<li>Gems like <a href="https://github.com/applicationsonline/librarian-chef">Librarian-Chef</a> and <a href="https://github.com/RiotGames/berkshelf">Berkshelf</a> (both are like Bundler) are useful for managing cookbooks</li>
<li>BDD it using <a href="https://github.com/Atalanta/cucumber-chef/">Cucumber-Chef</a>
<ul>
<li>Runs code against an actual server (EC2 or Vagrant)</li>
</ul></li>
</ul></li>
</ol>
</div>
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</section>
<section class='left slide'>
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<div class='content'>
<h1>Initial setup - continued</h1>
<ol>
<li>Run it on a node
<ul>
<li>Use <a href="https://github.com/opscode/knife-ec2">Knife-EC2</a> to launch nodes</li>
<li>Run the chef-client. Two options:</li>
<li>ssh onto the target machine
<ul>
<li><code>chef-repo $ knife node show NODE_NAME</code></li>
<li><code>chef-repo $ ssh user@ip</code></li>
<li><code>chef-node $ chef-client</code></li>
</ul></li>
<li>use <code>knife ssh</code>
<ul>
<li><code>bundle exec knife ssh 'name:NODE_NAME' 'chef-client'</code></li>
<li>useful switches:
<ul>
<li><code>-i /path/to/chef.pem</code></li>
<li><code>-x root</code> run as root user (default is ubuntu)</li>
</ul></li>
</ul></li>
</ul></li>
</ol>
</div>
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</section>
<section class='left slide'>
<div class='spacer top'></div>
<div class='content'>
<h1>Anatomy of a Chef Repo</h1>
<ul>
<li>chef-repo/
<ul>
<li>config/
<ul>
<li>rake.rb</li>
</ul></li>
<li>cookbooks/</li>
<li>data_bags/</li>
<li>environments/</li>
<li>roles/</li>
<li>Rakefile</li>
<li>chefignore</li>
<li>README.md</li>
</ul></li>
</ul>
</div>
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</section>
<section class='left slide'>
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<h1>Anatomy of a Chef Repo</h1>
<p>My additions:</p>
<ul>
<li>chef-repo/
<ul>
<li>...</li>
<li>features/
<ul>
<li>step_definitions/</li>
<li>support/
<ul>
<li>environments/
<ul>
<li>test.rb</li>
</ul></li>
<li>env.rb</li>
</ul></li>
</ul></li>
<li>lib/
<ul>
<li>tasks/</li>
</ul></li>
<li>Cheffile</li>
<li>Cheffile.lock</li>
<li>Gemfile</li>
<li>Gemfile.lock</li>
</ul></li>
</ul>
</div>
<div class='spacer bottom'></div>
</section>
<section class='left slide'>
<div class='spacer top'></div>
<div class='content'>
<h1>Anatomy of a Chef Cookbook</h1>
<ul>
<li>my_cookbook/
<ul>
<li>attributes/
<ul>
<li>default.rb</li>
</ul></li>
<li>definitions/</li>
<li>files/
<ul>
<li>default/</li>
</ul></li>
<li>libraries/</li>
<li>providers/</li>
<li>recipes/
<ul>
<li>default.rb</li>
</ul></li>
<li>resources/</li>
<li>templates/</li>
<li>metadata.rb</li>
<li>README.md</li>
</ul></li>
</ul>
</div>
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</section>
<section class='left slide'>
<div class='spacer top'></div>
<div class='content'>
<h1>Anatomy of a Chef Cookbook</h1>
<p>My additions:</p>
<ul>
<li>my_cookbook/
<ul>
<li>...</li>
<li>spec/
<ul>
<li>spec_helper.rb</li>
<li>default_spec.rb</li>
</ul></li>
<li>Cheffile</li>
<li>Cheffile.lock</li>
<li>Gemfile</li>
<li>Gemfile.lock</li>
</ul></li>
</ul>
</div>
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</section>
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