Provisioning with Vagrant & Puppet

Showcase for using vagrant and puppet to continuously provision a system under test for testing your apps in a continuous integration system

Transcript

1. Continuous SUT deployment Provisioning with Vagrant & Puppet @ Elmar
3. We take testing seriously
4. Tools
6. Problems
7. Problems with SUT deployment
8. Puppet failure
9. Even worse
10. Our complete infrastructure depends on Puppet
11. Puppet is like a programming language
12. Code breaks, so let's test it before it's deployed!
13. How to test Puppet code?
14. puppet --noop is not enough!
15. Isolate your test subjects
16. Split up Puppet code into modules
17. Puppet module internal structure Collection of resources, classes, files, definitions and templates
18. Why you should care about modules • Easily reusable and re-distributable • Benefit from existing modules (Puppet Forge) • Testability
19. Puppet modules @ Elmar
20. So now our Puppet code relies in isolated units. Can we unit test it?
21. Cucumber puppet
22. Unit testing Puppet like a pro (1) Initial setup of cucumber-puppet 1. gem install cucumber-puppet 2. cd ~/my_puppet_project 3. cucumber-puppet-gen world
23. Unit testing Puppet like a pro (2) Creating your high level language test 1. cucumber-puppet-gen debian_apt.feature 2. vim debian_apt.feature
24. Unit testing Puppet like a pro (3) Creating the cucumber step definition Generated by cucumber-puppet
25. Unit testing Puppet like a pro (4) Cucumber-puppet debian_apt.feat
26. So we're sure our Puppet code works...
27. ...things can still go wrong, though
30. Wouldn't it be nice if we get rid of puppet master?
32. Why I love Vagrant and you should too
33. Vagrant supports provisioning VMs
34. Provisioning: Taking a server from bare metal to setting up the services to be provided
35. Vagrant provisioners OOTB • Chef Solo • Chef Server • Puppet • Puppet Server • Shell
36. Vagrant configuration
37. Now dance for me puppets, dance! • vagrant up • vagrant reload ◦ Reboots the VM • vagrant provision ◦ Runs puppet!
38. Introducing: Vagrant plugin for Jenkins
39. Vagrant destroys my VM after the job has finished...
40. ...how can I see the (erroneous) state of my VM after the run?
42. Gem install vagrant-snap • snap take • snap back • snap go
43. We can restore a VM's state to troubleshoot on problems
44. Enables devops to 'snap back' to a base version of the VM while making Puppet changes
45. Demo
46. References Puppet Modules • http://docs.puppetlabs.com/guides/modules.html • http://forge.puppetlabs.com Testing Puppet • https://github.com/nistude/cucumber-puppet.example • http://puppetlabs.com/blog/testing-modules-in-the-puppet-forge Vagrant • http://vagrantup.com/docs/provisioners/puppet.html • http://unethicalblogger.com/2012/03/13/introducing-the-vagrant-plugin.html • https://github.com/t9md/vagrant-snap