website: parallel builds

website/source/intro/getting-started/parallel-builds.html.markdown

+---
+layout: "intro"
+page_title: "Parallel Builds"
+prev_url: "/intro/getting-started/provision.html"
+next_url: ""
+next_title: ""
+---
+
+# Parallel Builds
+
+So far we've shown how Packer can automatically build an image and provision it.
+This on its own is already quite powerful. But Packer can do better than that.
+Packer can create multiple images for multiple platforms _in parallel_, all
+configured from a single template.
+
+This is a very useful and important feature of Packer. As an example,
+Packer is able to make an AMI and a VMware virtual machine
+in parallel provisioned with the _same scripts_, resulting in near-identical
+images. The AMI can be used for production, the VMware machine can be used
+for development. Or, another example, if you're using Packer to build
+[software appliances](http://en.wikipedia.org/wiki/Software_appliance),
+then you can build the appliance for every supported platform all in
+parallel, all configured from a single template.
+
+Once you start taking advantage of this feature, the possibilities begin
+to unfold in front of you.
+
+Continuing on the example in this getting started guide, we'll build
+a [DigitalOcean](http://www.digitalocean.com) image as well as an AMI. Both
+will be near-identical: bare bones Ubuntu OS with Redis pre-installed.
+However, since we're building for both platforms, you have the option of
+whether you want to use the AMI, or the DigitalOcean snapshot. Or use both.
+
+## Setting Up DigitalOcean
+
+[DigitalOcean](https://www.digitalocean.com/) is a relatively new, but
+very popular VPS provider that has popped up. They have a quality offering
+of high performance, low cost VPS servers. We'll be building a DigitalOcean
+snapshot for this example.
+
+In order to do this, you'll need an account with DigitalOcean.
+[Sign up for an account now](https://www.digitalocean.com/). It is free
+to sign up. Because the "droplets" (servers) are charged hourly, you
+_will_ be charged $0.01 for every image you create with Packer. If
+you're not okay with this, just follow along.
+
+<div class="alert alert-block alert-warn">
+<strong>Note!</strong> I want to repeat, in case you didn't see above:
+You <em>will</em> be charged $0.01 by DigitalOcean per image created with Packer
+because of the time the "droplet" is running.
+</div>
+
+Once you sign up for an account, grab your client ID and API key from
+the [DigitalOcean API access page](https://www.digitalocean.com/api_access).
+Save these values somewhere, you'll need them in a second.
+
+## Modifying the Template
+
+We now have to modify the template to add DigitalOcean to it. Modify the
+template we've been using and add the following JSON object to the `builders`
+array.
+
+<pre class="prettyprint">
+{
+  "type": "digitalocean",
+  "api_key": "INSERT API KEY HERE",
+  "client_id": "INSERT CILENT ID HERE"
+}
+</pre>
+
+Fill in your `api_key` and `client_id` for DigitalOcean as necessary.
+The entire template should now [look like this](https://gist.github.com/mitchellh/51a447e38e7e496eb29c).
+
+Additional builders are simply added to the `builders` array in the template.
+This tells Packer to build multiple images. The builder `type` values don't
+even need tdo be different! In fact, if you wanted to build multiple AMIs,
+you can do that as well.
+
+Validate the template with `packer validate`. This is always a good practice.
+
+## Build
+
+Now run `packer build example.json`. The output is too verbose to include
+all of it, but a portion of it is reproduced below. Note that the ordering
+and wording of the lines may be slightly different, but the effect is the
+same.
+
+```
+$ packer build example.json
+==> amazon-ebs: amazon-ebs output will be in this color.
+==> digitalocean: digitalocean output will be in this color.
+
+==> digitalocean: Creating temporary ssh key for droplet...
+==> amazon-ebs: Creating temporary keypair for this instance...
+==> amazon-ebs: Creating temporary security group for this instance...
+==> digitalocean: Creating droplet...
+==> amazon-ebs: Authorizing SSH access on the temporary security group...
+==> amazon-ebs: Launching a source AWS instance...
+==> digitalocean: Waiting for droplet to become active...
+==> amazon-ebs: Waiting for instance to become ready...
+==> digitalocean: Connecting to the droplet via SSH...
+==> amazon-ebs: Connecting to the instance via SSH...
+...
+==> Builds finished. The artifacts of successful builds are:
+--> amazon-ebs: AMIs were created:
+
+us-east-1: ami-376d1d5e
+--> digitalocean: A snapshot was created: packer-1371870364
+```
+
+As you can see, Packer builds both the Amazon and DigitalOcean images
+in parallel. It outputs information about each in different colors
+(although you can't see that in the block above) so that it is easy to identify.
+
+At the end of the build, Packer outputs both of the artifacts created
+(an AMI and a DigitalOcean snapshot). Both images created are bare bones
+Ubuntu installations with Redis pre-installed.

website/source/layouts/inner.erb

@@ -14,12 +14,16 @@
 			<% if current_page.data.next_url %>
 				<div class="pagination">
 					<a class="previous-section" href="<%= current_page.data.prev_url %>"></a>
+					<% if current_page.data.next_url == "" %>
+					<h4><span class="text-green uppercase">End</span></h4>
+					<% else %>
 					<a class="next-section" href="<%= current_page.data.next_url %>">
 						<h4>
 							<span class="text-green uppercase">next</span>
 							<%= current_page.data.next_title %>
 						</h4>
 					</a>
+					<% end %>
 				</div>
 			<% end %>
 

website/source/layouts/intro.erb

@@ -15,8 +15,7 @@
 			<li><a href="/intro/getting-started/setup.html">Install Packer</a></li>
 			<li><a href="/intro/getting-started/build-image.html">Build an Image</a></li>
 			<li><a href="/intro/getting-started/provision.html">Provision</a></li>
-			<li><a href="#">Parallel Builds</a></li>
-			<li><a href="#">Post-Process</a></li>
+			<li><a href="/intro/getting-started/parallel-builds.html">Parallel Builds</a></li>
 		</ul>
 	<% end %>
 	<%= yield %>