Virtualization for Developers

John Coggeshall
@coogle
http://www.coggeshall.org/

 A bit about me
 Involved with PHP since
1996
 Author of tidy extension
 Published Author of
many PHP texts

 Virtualization for you, the developer
 Creating fully encapsulated development environments
▪ Fully Version Controlled
 Available locally using free tools or deploy to EC2 as
necessary
 The technologies we are going to discuss
 Vagrant – Bootstrap virtual machines, manage box
settings, etc.
 VirtualBox – Provides the actual VM environment for
machine
 Puppet – Provisions box, installs and manages various
software, code, etc. (also supports others such as Chef,
shell scripts, etc.)

 There are a lot of reasons to use VMs for
development
 Keep your host machine clean / easily recover from
corruption
 Keep separate projects from stepping on each other
 Super easy developer on-boarding
 There are even more reasons to use Vagrant &
Puppet
 Much easier management of the stack, versions, etc.
 Allows seamless deployment to various environments
for testing

 To get started, you’re going to need to
download two pieces of software
 Vagrant - http://www.vagrantup.com/
 VirtualBox - https://www.virtualbox.org/
 There are builds available for all major
platforms

 Step 1: Download the tools
 Step 2: Define your VM parameters
 Step 3: Build your puppet manifests
 Step 4: Prosper

 Every repository should have a Vagrantfile in the root
directory that defines the VM itself
 Ruby based, but no Ruby knowledge required
 Defines a few key aspects of your initial VM
configuration
 Base VM type used (various available)
 Network configuration for VM in relation to host machine
 Provisioning tooling used (i.e. puppet)
 VM resource limits (memory, etc)
 Different configurations can be defined for different
environments, and propagated throughout the
process

 Once the VM has been defined vagrant can
boot it up as a headless VM (no display) using
VirtualBox automatically and configure it as
necessary
 Once booted, it can then provision the box by
installing software packages, shared paths
with hosts, etc. as necessary through the use
of provisioning tools like puppet
 Next step is defining your puppet manifests

 With everything defined, one command takes
care of it all!
 Downloads the VirtualBox image if necessary
(precise64)
 Boots the VM with the defined parameters (memory,
network, etc)
 Sets of shared folders, copies puppet manifests as
necessary and executes puppet to run those manifests

 vagrant up – Brings up the virtual machine
 vagrant halt – Halts the VM (poweroff)
 vagrant destroy – Destroys the VM entirely
 vagrant provision – Run puppet provisioning
again
 vagrant ssh – automagically log into the VM
via SSH

 Primarily Vagrant is used to build local VMs for
development
 But Vagrant can also be used to deploy to other
environments, such as AWS through the use of
Vagrant plug-ins
 First, install the Vagrant AWS provider plug-in:

 Next, you will need to add a new
environment to your Vagrantfile to setup the
necessary configuration values for AWS such
as Key/Secret, AMI type, etc.
 Note: To do provisioning using puppet, you
may need to bootstrap the AMI on boot to
install the puppet tooling
 To boot, simply add the --provider option to
vagrant up

 A single Vagrantfile can define multiple VMs
(multi-machine environments) useful for all
sorts of things:
 A web server and database server
 API client and server
 Etc.
 Vagrant can do more than just VirtualBox as
well, through providers can also provide
VMWareVMs, etc.

 Vagrantfile configuration files can be created
at various levels, and will be merged together
to define/override settings
 Box itself (precise64)
 Home directory (~/.vagrant.d)
 Project directory

 Thank you for coming!
 Questions?
 Further Reading:
 http://docs.vagrantup.com/v2/
 http://puppetlabs.com/
 http://www.github.com/coogle/skeleton
 https://joind.in/12070

Virtualization for Developers

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