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Commit On Day One Thanks to Vagrant & Puppet!

Instructions for a quick, demo-based introduction into Vagrant. Get the accompanying presentation at SlideShare.

Time needed: 10 - 14 min.

What to prepare to follow the demo

  1. Install Vagrant:
  2. Install $ vagrant gem install vagrant-vbguest (Why?)
  3. Download a base box: vagrant box add base
  4. Install VirtualBox, e,g, 4.1.16: (For the presenter: Make sure the VB version is the same as VB Guest Additions installed on the base box.)

The demo

Note: Net connection required (Puppet accesses Apt repositories when installing SW).


  • browser for showing the web site
  • two terminal tabs in a fullscreen window (with suitable font size and color scheme) ** Terminal 1: empty ** Terminal 2: run 'cat copy' (diff, copy config) and type 'vim manifest/base.pp' w/o executing it yet
  • the presentation in fullscreen


  • While running vagrant up: talk about puppet, show its config
  • While running provision: Slide benefits
  • While running destroy: Slide pitfalls

1. A simple VM

$ mkdir vm; cd vm
$ vagrant       # displays help
$ vagrant init
$ diff Vagrantfile ../vm-finished/Vagrantfile # our 4 changes to the default config
$ cp ../vm-finished/Vagrantfile .
$ vim Vagrantfile   # to show it (well documented; options to know)

Our modifications to the default Vagrantfile:

  • Set the base box URL ** So that it will be automatically downloaded if not present on the machine
  • Shared directories - add www (by default: the dir with Vagrantfile is shared as /vagrant)
  • Mapped ports - make Apache's 80 available as localhost:8080 on the host
  • Provisioner - enable puppet (altern.: shell, chef)
$ mkdir manifests; touch manifests/base.pp  # empty puppet config
$ vagrant up
 # Show our puppet manifest briefly (package installation, dir copy, service startup)
 # Afterwards: Highlight parts of the output: VM creation, dir sharing, port mapping, puppet execution

2. Installing & configuring SW with Puppet

Reusable configuration - Puppet can install SW, create files, users etc., execute commands, start services - used to set up the system in a repeatable manner.

To learn more about Puppet read the Minimalistic Practical Introduction to Puppet For Vagrant Users.

 # Copy the previously shown manifest and the apache config files:
$ cp ../vm-finished/manifests/base.pp manifests/base.pp
$ cp -r ../vm-finished/files/ files

Re-run the puppet provisioner:

vagrant provision

(While running, show the slide Benefits. Afterwards show the input, highlight package installation, file copying, service starting.)

Daily use

$ vagrant ssh       # password-less ssh into the VM as the user vagrant
vagrant$ sudo ls /  # the user has password-less access to sudo
 # Ex.: tail apache log & browse to the port on the host machine

$ vagrant halt      # use 'vagrant suspend' to just sleep
$ vagrant destroy   # remove the VM

(While halting, show the slide Pitfalls.)

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