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<!doctype html>
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<head>
<meta charset="utf-8">
<title>Session 4 ~ Intro to Servers ~ Girl Develop IT</title>
<meta name="description" content="GirlDevelopIT Boulder - Intro to Servers - Session 4">
<meta name="author" content="Weston Platter">
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<div class="reveal">
<div class="slides">
<!-- course overview -->
<section>
<h3>4 sessions</h3>
<div class="left-align">
<p>Session 1 - What are servers? What is the internet?</p>
<p>Session 2 - How to interact with servers</p>
<p>Session 3 - How to setup and use NGINX</p>
<p><b>Session 4 - How to use Vagrant</b></p>
</div>
</section>
<section>
<h3>Session 3 Review</h3>
<img src="images/session-3-endgoal.png">
</section>
<section>
<h3>End Goal</h3>
<br>
<p>Use Vagrant to create a VM,</p>
<p>and setup HTML site & Nodejs site</p>
</section>
<section>
<h3>What is Vagrant?</h3>
<p>(visually)</p>
<img src="images/virtualbox-vagrant.jpg">
</section>
<section>
<h3>What is Vagrant?</h3>
<p>(technically)</p>
<br>
<p>Tool to create and configure,</p>
<ul>
<li>lightweight</li>
<li>reproducible</li>
<li>portable</li>
</ul>
<p>development environments</p>.
</section>
<section>
<h3>Vagrant Workflow</h3>
<img src="images/vagrant-workflow.png">
<p style="font-size: 50%;">http://www.digitalforreallife.com/2012/11/boosting-teamwork-with-vagrant/</p>
</section>
<section>
<h3>Where this helps</h3>
<br>
<p>The Rails Database Driver supports</p>
<ul>
<li>Sqlite</li>
<li>MySQL</li>
<li>Postgres</li>
</ul>
<br>
<br>
<p>All new features have to be tested against each.</p>
<br>
<p>Rails Dev Box runs automated tests for each Database</p>
</section>
<section>
<h3>Virtual Box</h3>
<br>
<p class="left-align">"Emulates" Hadware</p>
<ul class="wider">
<li>Monitor</li>
<li>Network Card, Wifi, IP Addreses</li>
<li>Hard Drive</li>
<li>RAM</li>
</ul>
<br>
<br>
<p class="left-align">Terms</p>
<ul class="wider">
<li>VM stands for "virtual machine"</li>
<li>Guest Machine = "virtual machine"</li>
</ul>
</section>
<section>
<h3>Using Vagrant + VirtualBox</h3>
<br>
<p >Control Vagrant via command Line and config files</p>
<br>
<p>Mac Users - terminal</p>
<br>
<p>Windows Users - "Git Bash" program</p>
<br>
<p>Editing files - Your favorite text editor or Sublime</p>
</section>
<section>
<h3>Vagrant commands</h3>
<ul>
<li>destroy</li>
<li>halt</li>
<li>help</li>
<li>init</li>
<li>provision</li>
<li>reload</li>
<li>resume</li>
<li>ssh</li>
<li>status</li>
<li>suspend</li>
<li>up</li>
</ul>
</section>
<section>
<h3>vagrant help</h3>
<pre><code>vagrant help</code></pre>
<br>
<p>Shows a list of all possible commands</p>
</section>
<section>
<h3>vagrant init</h3>
<pre><code>vagrant init [box-name] [box-url]</code></pre>
<br>
<p>Creates an initial Vagrantfile if one doesn't already exist.</p>
<br>
<p>If one doesn't exist ... in your current location</p>
</section>
<section>
<h3>vagrant up</h3>
<pre><code>vagrant up</code></pre>
<br>
<p>Creates and configures guest machines according to your Vagrantfile.</p>
</section>
<section>
<h3>vagrant status</h3>
<pre><code>vagrant status</code></pre>
<br>
<p>This tells you the state of the machines Vagrant is managing.</p>
<br>
<p>Only works if there's a Vagrantfile in your current location</p>
</section>
<section>
<h3>vagrant provision</h3>
<pre><code>vagrant provision</code></pre>
<br>
<p>Runs any configured provisioners against the running Vagrant managed machine.</p>
</section>
<section>
<h3>vagrant ssh</h3>
<pre><code>vagrant ssh</code></pre>
<p>This will SSH into a running Vagrant machine and give you access to a shell.</p>
</section>
<section>
<h3>vagrant reload</h3>
<pre><code>vagrant reload</code></pre>
<br>
<p>The equivalent of running a halt followed by an up.</p>
<br>
<p>After making any modifications to the Vagrantfile, a reload should be called.</p>
</section>
<section>
<h3>vagrant suspend</h3>
<pre><code>vagrant suspend</code></pre>
<br>
<p>This suspends the guest machine Vagrant is managing, rather than fully shutting it down or destroying it.</p>
<br>
<p>Vagrant saves the Guest Machine's RAM contents on your Hard Drive - therefore requiring space</p>
</section>
<section>
<h3>vagrant resume</h3>
<pre><code>vagrant resume</code></pre>
<br>
<p>Resumes a Vagrant managed machine that was previously suspended, perhaps with the suspend command.</p>
</section>
<section>
<h3>vagrant halt</h3>
<pre><code>vagrant halt</code></pre>
<br>
<p>Shuts down the running machine Vagrant is managing.</p>
<br>
<p>First attempts to gracefully shut down the machine by running the guest OS shutdown mechanism.</p>
<br>
<p>If this fails, Vagrant will "shut off" power to the machine.</p>
</section>
<section>
<h3>vagrant destroy</h3>
<pre><code>vagrant destroy</code></pre>
<br>
<p>Stops the running machine Vagrant is managing and destroys all resources that were created during the machine creation process.</p>
<br>
<p>As if the Virtual Machine was never there</p>
</section>
<section>
<h3>What do I need to ...</h3>
<br>
<div class="left-align">
<p>Know</p>
<ul class="w10">
<li>Vagrant is a command line tool to manage VMs</li>
<li>The VMs are "built" according to their Vagrantfile</li>
</ul>
</div>
<br>
<div class="left-align">
<p>See</p>
<ul class="wider">
<li>Duplicate VM "state" between devs</li>
<li>Duplicate production servers locally</li></li>
</ul>
</div>
</section>
<section>
<h3>Build a VM walk through</h3>
<br>
<p>Start by having Vagrant create a "Vagrantfile"</p>
<pre><code>vagrant init</code></pre>
<img class="scale50" src="images/virtualbox-vagrant.jpg">
</section>
<section>
<h3>Simplify Vagrant file</h3>
<br>
<p>Replace Vagrantfile contents and replace with</p>
<br>
<pre><code class="ruby">Vagrant.configure("2") do |config|
config.vm.box = "intro-to-servers"
config.vm.box_url = "http://files.vagrantup.com/precise64.box"
config.vm.provider :virtualbox do |vb|
# Use VBoxManage to customize the VM. For example to change memory:
vb.customize ["modifyvm", :id, "--memory", "512"]
end
end</code></pre>
</section>
<section>
<h3>Start Vagrant</h3>
<br>
<p>Use the "up" command</p>
<pre><code>vagrant up</code></pre>
<br>
<p>Again, this tells Vagrant to create the VM through</p>
<p>VirtualBox according to Vagrantfile configurations.</p>
</section>
<section>
10 min break
</section>
<section>
<h3>Vagrant is up</h3>
<br>
<p>Time to go exploring</p>
</section>
<section>
<h3>The Vagrant Box</h3>
<br>
<p>How do we SSH into a VM that's on our computer?</p>
<br>
<p>Use the Vagrant provided SSH interface</p>
<pre><code>vagrant ssh</code></pre>
</section>
<section>
<h3>Explore the /vagrant folder</h3>
<br>
<p>Upon successfully SSH-ing into the VM</p>
<br>
<p>Where are we?</p>
<pre><code>pwd</code></pre>
<br>
<p>Vagrant automatically mirrors files in the "Vagrantfile" directory to "/vagrant"</p>
<pre><code>cd /vagrant
ls -als
0 drwxr-xr-x 1 vagrant vagrant 136 Feb 10 04:56 .
4 drwxr-xr-x 24 root root 4096 Feb 10 04:59 ..
0 drwxr-xr-x 1 vagrant vagrant 102 Feb 10 04:57 .vagrant
4 -rw-r--r-- 1 vagrant vagrant 319 Feb 10 04:57 Vagrantfile</code></pre>
</section>
<section>
<h3>VirtualBox hardware emulation</h3>
<h5>Assign a static, private IP to VM</h5>
<br>
<p>To do this, we add the following to the Vagrant file</p>
<pre><code>Vagrant.configure("2") do |config|
config.vm.box = "intro-to-servers"
config.vm.box_url = "http://files.vagrantup.com/precise64.box"
config.vm.provider :virtualbox do |vb|
# Use VBoxManage to customize the VM. For example to change memory:
vb.customize ["modifyvm", :id, "--memory", "512"]
end
config.vm.network :private_network, ip: "192.168.50.4"
end</code></pre>
<p>Reload vagrant</p>
<pre><code>vagrant reload</code></pre>
</section>
<section>
<h3>Why would we want a static IP?</h3>
<br>
<p>Helps while developing software</p>
<br>
<p>Mimic multi box or server env. EG,</p>
<ul class="w5">
<li>IP-1 = database</li>
<li>IP-2 = backend server</li>
<li>IP-3 = frontend server</li>
</ul>
<br>
<br>
<p>Assigning IP addresses to each Vagrant box make it</p>
<p>easy to configure your app's multi box needs.</p>
</section>
<section>
<h3>VirtuaBox hardware emulation</h3>
<h5>Port forwarding</h5>
<p>Forward HTTP Requests made to</p>
<p>your computer's port 9000</p>
<p>to VM's port 80</p>
<pre><code>Vagrant.configure("2") do |config|
config.vm.box = "intro-to-servers"
config.vm.box_url = "http://files.vagrantup.com/precise64.box"
config.vm.provider :virtualbox do |vb|
# Use VBoxManage to customize the VM. For example to change memory:
vb.customize ["modifyvm", :id, "--memory", "512"]
end
config.vm.network :private_network, ip: "192.168.50.4"
config.vm.network :forwarded_port, guest: 80, host: 9000
end</code></pre>
<p>Reload Vagrant</p>
<pre><code>vagrant reload</code></pre>
</section>
<section>
<h3>Why forward ports?</h3>
<br>
<p>Avoids port collisions. For example, you want to</p>
<p>run 3 versions of MySQL simultaneously.</p>
<img src="images/virtualbox-port-forwarding-example.jpeg">
</section>
<section>
<h3>End of VirtualBox</h3>
<br>
<br>
<h3>Free time to</h3>
<p>setup HTML or Javascript site</p>
<p>on Vagrant machine</p>
</section>
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Intro to Servers ♥ Girl Develop It Boulder
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