Have you ever heard the following? "Welcome to the team! Here's a list of 15 applications to install, the instructions are in the team room, somewhere. See you in a week!" Or: "What do you mean it broke production, it runs fine on my machine?" Or: "Why is this working on her machine and his machine, but not my machine?"
Development environments are becoming more complex, with more moving parts and tricky dependencies. Virtualization has been a huge boon for the IT industry in saving costs, increasing flexibility and maintaining control over complex environments. Rather than focusing on virtualization on the delivery side, let's look at how you can provide that flexibility and control to developers to manage multiple development environments easily using Vagrant.
What Is Vagrant?
Vagrant is an open-source (MIT) tool for building and managing virtualized development environments developed by Mitchell Hashimoto and John Bender. Vagrant manages virtual machines hosted in Oracle VirtualBox, a full x86 virtualizer that is also open source (GPLv2).
A virtual machine is a software implementation of a computer, running a complete operating system stack on a virtualizer. It is a full implementation of a computer with a virtual disk, memory and CPU. The machine running the virtualizer is the Host system. The virtual machine running on the virtualizer is the Guest system. As far as the Guest operating system is concerned, it is running on real hardware. From the perspective of the Host, all of the Guest's resources are used by the virtualizer program. A Box, or base image, is the prepackaged virtual machine that Vagrant will manage.
Starting in version 1.0, Vagrant provides two installation methods: packaged installers for supported platforms or a universal install with Ruby Gems. This article covers installation using Gems. This method has three parts: 1) install VirtualBox, 2) install Ruby and 3) install Vagrant itself.
VirtualBox is available from the VirtualBox home page with builds for Windows, OS X, Linux and Solaris. Note that Oracle provides the Oracle VM VirtualBox Extension Pack on the Download site that provides additional features to the virtualizer. The Extension Pack has a separate license (Personal Use and Evaluation License) and is not needed to use Vagrant, but if the Box you are using was created using the Extension Pack, you will need to install the Extension Pack as well.
Ruby is a popular dynamically typed object-oriented scripting language. Ruby is available out of the box in OS X, and most Linux distributions also have a Ruby package available. For Windows users, the RubyInstaller Project provides an easy way to install the Ruby runtime.
Ruby libraries and applications are available in packages called RubyGems or Gems. Ruby comes with a package management tool called gem. To install Vagrant, run the gem command:
> gem install vagrant
Vagrant is a command-line tool. Calling
vagrant without additional
arguments will provide the list of available arguments. I'll visit most of
these commands within this article, but here's a quick overview:
init— create the base configuration file.
up— start a new instance of the virtual machine.
suspend— suspend the running guest.
halt— stop the running guest, similar to hitting the power button on a real machine.
resume— restart the suspended guest.
reload— reboot the guest.
status— determine the status of vagrant for the current Vagrantfile.
provision— run the provisioning commands.
destroy— remove the current instance of the guest, delete the virtual disk and associated files.
box— the set of commands used to add, list, remove or repackage box files.
package— used for the creation of new box files.
sshto a running guest.
The last thing you need to do in your installation is set up a base image. A
Box, or base image, is the prepackaged virtual machine that Vagrant will
manage. Use the
box command to add the Box to your environment.
vagrant box add command takes two arguments, the
name you use to refer to the Box and
the location of the Box:
> vagrant box add lucid32 http://files.vagrantup.com/lucid32.box
This command adds a new Box to the system called "lucid32" from a remotely hosted site over HTTP. Vagrant also will allow you to install a Box from the local filesystem:
> vagrant box add rhel5.7 rhel5.7-20120120-1223.box [vagrant] Downloading with Vagrant::Downloaders::File... [vagrant] Copying box to temporary location... [vagrant] Extracting box... [vagrant] Verifying box... [vagrant] Cleaning up downloaded box... >
Fast/Flexible Linux OS Recovery
On Demand Now
In this live one-hour webinar, learn how to enhance your existing backup strategies for complete disaster recovery preparedness using Storix System Backup Administrator (SBAdmin), a highly flexible full-system recovery solution for UNIX and Linux systems.
Join Linux Journal's Shawn Powers and David Huffman, President/CEO, Storix, Inc.
Free to Linux Journal readers.Register Now!
- Back to Backups
- Download "Linux Management with Red Hat Satellite: Measuring Business Impact and ROI"
- Google's Abacus Project: It's All about Trust
- Secure Desktops with Qubes: Introduction
- Seeing Red and Getting Sleep
- Fancy Tricks for Changing Numeric Base
- Secure Desktops with Qubes: Installation
- Linux Mint 18
- Working with Command Arguments
- CentOS 6.8 Released
Until recently, IBM’s Power Platform was looked upon as being the system that hosted IBM’s flavor of UNIX and proprietary operating system called IBM i. These servers often are found in medium-size businesses running ERP, CRM and financials for on-premise customers. By enabling the Power platform to run the Linux OS, IBM now has positioned Power to be the platform of choice for those already running Linux that are facing scalability issues, especially customers looking at analytics, big data or cloud computing.
￼Running Linux on IBM’s Power hardware offers some obvious benefits, including improved processing speed and memory bandwidth, inherent security, and simpler deployment and management. But if you look beyond the impressive architecture, you’ll also find an open ecosystem that has given rise to a strong, innovative community, as well as an inventory of system and network management applications that really help leverage the benefits offered by running Linux on Power.Get the Guide