The document discusses continuous infrastructure testing using ServerSpec to test servers through SSH access. ServerSpec allows writing tests that validate a server's actual state by describing resources like users, packages, services, files and processes and making assertions about their configuration and properties. The tests can be run via Rake and automated through Jenkins to continuously test external managed infrastructure. A demo is given of ServerSpec tests that validate properties of users, packages, services and files.

1. Continuous
Infrastructure
Testing

2. WHOAMI

3. class daniël {
class {'::work':
company => 'Inuits',
location => 'Rotterdam',
role => 'Open Source Consultant',
contact => 'daniel@inuits.eu',
}
class {'::social':
twitter => '@dpnl87',
github => 'dpnl87',
blog => 'danielpaulus.com',
}
}

4. THE PROBLEM

5. Ever worked on external
managed infrastructure?

6. “The application stopped
working all of a sudden”

7. “We didn't
change anything!”

8. How can we validate external
managed systems?

9. SERVERSPEC

10. Test servers actual state
through SSH access

11. require 'spec_helper'
describe '<name of the resource>' do
# your tests ...
end

12. describe user 'daniel' do
it { should exist }
it { should belong_to_group 'sudo' }
it { should have_home '/home/daniel' }
end

13. describe package 'ntp' do
it { should be_installed }
end
describe package 'chef' do
it { should be_installed.by('gem') }
end

14. describe service 'ssh' do
it { should be_enabled }
end
describe process 'sshd' do
it { should be_running }
end
describe file '/etc/ssh/sshd_config' do
its(:content) {
should match
/^PermitEmptyPasswordsW+no$/
}
end

15. describe file '~/.ssh/' do
it { should be_directory }
it { should be_mode 700 }
end
describe file '~/.ssh/authorized_keys' do
it { should be_file }
it { should be_mode 600 }
it { should contain('daniel@inuits') }
it { should be_owned_by 'daniel' }
end

16. -> % rake spec
.........
Finished in 2.55 seconds
9 examples, 0 failures

17. AUTOMATE THE TESTS

18. Show your <3 to Jenkins

22. DEMO