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How not to freak out …
… when you start writing Puppet
modules on Windows
before we start ...
Me
• Senior Software Engineer at PuppetSpecialising in Windows
• 15 years in Desktop Engineering and ITNavy, Government, Mining, Finance, Corporate
• DevOps advocate
The setup …
What do we need?
• Setting up a development environment
• Create a Puppet module
• Debugging tools
What do we need?
• Testing tools
• Publish the module
• Next steps
• Setup environment
• Create module
• Debug tools
• Test tools
• Publish module
• Next steps
• Setup environment
• Create module
• Debug tools
• Test tools
• Publish module
• Next steps
Tools you probably already have
• Windows computer
• Text editor
• Puppet Agent
Tools you probably need to install
• Source Control
• Ruby and Ruby Dev Kit
Why Source Control?• Made a change and realised it was a mistake and wanted to revert back?
• Lost a modules or had a backup that was too old?
• Wanted to see the difference between two (or more) versions of your
modules?
• Wanted to prove that a change broke or fixed a piece of modules?
• Wanted to review the history of a modules?
• Wanted to submit a change to someone else's modules?
• Wanted to share your modules, or let other people work on your modules?
• Wanted to see how much work is being done, and where, when and by
whom?
• Wanted to quickly experiment something new without breaking anything?
…
Why Source Control?
•Undo mistakes
•Be kind to you future self
Why Source Control?
Prefer git for Puppet Module work
• Lightweight
• Doesn’t require a central server
• Very common
But, choose something that’s appropriate for you …
Why Ruby?
Q: Why use ruby?
A: Because, Puppet.
Why Ruby?
Q: Doesn’t that already come with
Puppet Agent?
A: Yes, but…
Which text editor?
Common - Atom, Notepad++, VS CodeSome have ruby and puppet plugins to help with development
Lots of other options though….
Which text editor?
Common problems
• CRLF vs LF
Probably best to use LF
• Text Encoding and BOM
Unrecognised character at Line 1, Pos 1
How do we install these tools?
• Manual installation
• Chocolateyhttps://chocolatey.org
How do we install these tools?
PS> choco install git
PS> choco install puppet-agent
PS> choco install visualstudiocode
PS> choco install ruby ruby2.devkit
How do we install these tools?
Common problems
• Ruby Devkit can be tricky to install
Manually install the devkit into your ruby installation
• Setup environment
• Create module
• Debug tools
• Test tools
• Publish module
• Next steps
Create a Module – Where to start?
• Beginner’s Guide to Modules
• Module fundamentals
Creating a Module - Tools
Puppet Module Tool
bundler
rake
• Setup environment
• Create module
• Debug tools
• Test tools
• Publish module
• Next steps
Debugging tools
• pryConsole driven debugger for ruby
• pry-byebugPry plugin to add step-by-step and stack
debugging
• pry-stack_explorerPry plugin to navigate the call stack in ruby
Debugging tools
• Modify Gemfile
• Bundle install
…
gem "pry"
gem "pry-byebug"
gem "pry-stack_explorer"
Debugging tools
require "pry"; binding.pry
• Setup environment
• Create module
• Debug tools
• Test tools
• Publish module
• Next steps
Why should I test?
• The “un-happy” path
• Document the intent
• Avoid regression
Why should I test?
• Acceptance
• Integration
• Unit
Types of tests
Types of tests
Where should I start?
Start with unit and integration tests using
automated tools
Unit and Integration tests
• rspec
• rspec-mocks or mocha
• rspec-puppet
Testing tools
Acceptance tests
• beaker
• beaker-rspec
Testing tools
• Setup environment
• Create module
• Debug tools
• Test tools
• Publish module
• Next steps
Puppet Module Tool
puppet-blacksmith
Publishing tools
• Setup environment
• Create module
• Debug tools
• Test tools
• Publish module
• Next steps
• Setup environment
• Create module
• Debug tools
• Test tools
• Publish module
• Next steps
• Read up on testing
• Learn more ruby
• Add automated acceptance tests
What’s next
• Custom types and providers
• Test your Windows modules on
Linux nodes
What’s next
LinksSource Control
• The Release Pipeline Modulehttp://aka.ms/thereleasepipelinemodelpdf
• Ruby Installationhttp://rubyinstaller.org/downloads/
• Ruby DevKithttps://github.com/oneclick/rubyinstaller/wiki/Development-Kit
• What is the BOMhttps://en.wikipedia.org/wiki/Byte_order_mark
• Chocolateyhttps://chocolatey.org/
• Puppet Extension for Visual Studio Codehttps://marketplace.visualstudio.com/items?itemName=Borke.Puppet
Modules
• Puppet Enterprise quick start guide for Windows
usershttps://docs.puppet.com/pe/latest/quick_start_windows_intro.html
• Beginner’s Guide to Moduleshttps://docs.puppet.com/guides/module_guides/bgtm.html
• Module fundamentalshttps://docs.puppet.com/puppet/latest/reference/modules_fundamentals.html
• Ruby Bundlerhttp://bundler.io/
• puppet module generatehttps://docs.puppet.com/puppet/latest/reference/modules_fundamentals.html#writing-modules
LinksDebugging
• Pryhttp://pryrepl.org/
https://www.sitepoint.com/rubyists-time-pry-irb/
• pry-byebughttps://github.com/deivid-rodriguez/pry-byebug
• pry-stack_explorerhttps://github.com/pry/pry-stack_explorer
Testing
• Rspechttp://rspec.info/
• rspec-puppethttp://rspec-puppet.com/
• rspec-mockshttps://github.com/rspec/rspec-mocks
• mochahttp://gofreerange.com/mocha/docs/
• beakerhttps://github.com/puppetlabs/beaker/blob/master/docs/README.md
• beaker-rspechttps://github.com/puppetlabs/beaker-rspec
LinksPublishing
• puppet-blacksmithhttps://github.com/voxpupuli/puppet-blacksmith
• Publishing modules on the forgehttps://docs.puppet.com/puppet/4.7/reference/modules_publishing.html
• The metadata.json filehttps://docs.puppet.com/puppet/4.7/reference/modules_metadata.html
Other
• Puppet REPL
A REPL for the puppet languagehttps://github.com/nwops/puppet-repl
• Puppet Skeleton Module Generatorhttps://github.com/garethr/puppet-module-skeleton
• Puppet Strings
The next generation Puppet documentation
extraction and presentation toolhttps://github.com/puppetlabs/puppet-strings
