IAC (infrastructure-as-code)

sample project implementing Itamar Hassin's (of ThoughtWorks) infrastructure-as-code presentation

setup

things I had to do along the way to get everything to run (that I can remember)

Gemfile

create a Gemfile:

$ bundle init

add required gems

group :test do
  gem 'cucumber'
  gem 'serverspec'
  gem 'rake'
end

and install them in the project (to keep your environment clean)

$ bundle install --path vendor/bundle

~/.ssh/config

Host webserver 33.33.33.33
	Hostname webserver
	User vagrant
	IdentityFile .vagrant/machines/webserver/virtualbox/private_key
	StrictHostKeyChecking no
	UserKnownHostsFile=/dev/null

serverspec-init

$ bundle exec serverspec-init
Select OS type:

  1) UN*X
  2) Windows

Select number: 1

Select a backend type:

  1) SSH
  2) Exec (local)

Select number: 1

Vagrant instance y/n: y
Auto-configure Vagrant from Vagrantfile? y/n: y
 + spec/webserver/sample_spec.rb
 + spec/spec_helper.rb
 + Rakefile
 + .rspec

start the VM

I had to do this before serverspec or cucumber could succeed, though they are both capable of starting the VM. maybe some tweaks to spec_helper &/or the Vagrantfile would allow them to be self-sufficient

$ vagrant up --provision webserver

serverspec

$ bundle exec rake spec

Package "apache2"
  should be installed

Service "apache2"
  should be enabled
  should be running

Port "80"
  should be listening

File "/etc/apache2/sites-enabled/000-default.conf"
  should be file
  should contain "example.com"

Finished in 0.54695 seconds (files took 9.56 seconds to load)
6 examples, 0 failures

cucumber

$ bundle exec cucumber

Feature:
As a Webmaster (yeah baby!) I need a webserver to be running so that I may master it.

  Background:                    # features/httpd.feature:4
    Given my server is available # features/step_definitions/httpd_steps.rb:3
    And I provision it           # features/step_definitions/httpd_steps.rb:7

  Scenario:                                 # features/httpd.feature:7
    When I get access to it                 # features/step_definitions/httpd_steps.rb:11
    Then I expect it to have apache running # features/step_definitions/httpd_steps.rb:15

1 scenario (1 passed)
4 steps (4 passed)
0m34.949s

notes

Mx Hassin's presentation describes an iterative process to reach this point. A repo containing the final state is a bit of a spoiler and maybe not so useful to anyone who didn't go through the process. So perhaps just consider this a supplementary reference.

If you're more committed to these tools or less to keeping your environment clean, you could install the gems not just in the project and not need to bundle exec everything.

I had a lot of false starts and things to troubleshoot along the way, so it's likely I've forgotten something... The results are all here, but perhaps not all the steps required to get them.