making tdd [somewhat] bearable on openstack

Hart Hoover

Making Test-Driven Development [Somewhat] Bearable on OpenStack

@hhoover#rackstackatl

#rackstackatl

RACKSPACE VISION

To be recognized as one of the world’s great service companies.

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WELL TESTED = GOOD SERVICE

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TEST-DRIVEN DEVELOPMENT (TRADITIONAL)

Test-driven development is a software development process that relies on the repetition of a very short development cycle.

First the developer writes an (initially failing) automated test case that defines a desired improvement or new function,

then produces the minimum amount of code to pass that test,

then finally refactors the new code to acceptable standards.

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PLAN CODE BUILD TEST RELEASE DEPLOY OPS

THIS IS NOT TDDTHIS IS NOT “DEVOPS”

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PLAN CODE BUILD TEST RELEASE DEPLOY OPS

TESTTHAT’S A BIT BETTER(STILL NOT “DEVOPS”)

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TESTING IS A GOOD IDEA

FIND MISTAKES BEFORE

THEY HAPPEN

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YOUR TEAM WON’T HATE

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YOUR CUSTOMERS WON’T HATE

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THE PROBLEM…

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Object Placeholder

HERO CULTURE

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LAZINESS OR ARROGANCE

“I just want to write code, not tests.”

“My code works when I push it.”

“It works on my machine.”

“QA does the tests.”

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LEADERSHIP PRESSURE

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TIME IS MONEY

DEV TIME IS A LOT OF MONEY

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ONE SOLUTION: BE THE CHANGE YOU WANT TO SEE IN THE WORLD

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ANOTHER SOLUTION: CONTINUOUS TESTING

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TOOLS OF THE TRADE…

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http://hart.io

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DEPLOY A CHEF SERVER WITH HEAT

https://github.com/rackspace-orchestration-templates/chef-server

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CHEF DEVELOPMENT KIT

http://www.getchef.com/downloads/chef-dk/

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chefCHEF DEVELOPMENT KIT: CLI TOOLS

knifechef-‐client

Chef Zero

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CHEF DEVELOPMENT KIT - BERKSHELF

source ‘https://api.berkshelf.com' metadata !cookbook ‘apt’, ‘~> 2.0’ cookbook ‘minitest-‐handler’ cookbook ‘yum’, ‘~> 2.0’ cookbook ‘build-‐essential’, github: ‘opscode-‐cookbooks/build-‐essential’ cookbook ‘mysql_test’, :path => ‘test/cookbooks/mysql_test’

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kitchen.ci/docs/guide

Test Kitchen

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-‐-‐-‐ provisioner: name: chef_solo !platforms: -‐ name: ubuntu-‐14.04 !driver: name: rackspace rackspace_region: IAD server_name: rackspace-‐ubuntu1404 image_id: bb02b1a3-‐bc77-‐4d17-‐ab5b-‐421d89850fca flavor_id: performance1-‐1 require_chef_omnibus: latest !suites: -‐ name: default run_list: recipe[cookbook::default] attributes:

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ChefSpec• Built on RSpec• Converges a Chef run in memory• Overrides all providers to take no action• Mock Ohai data with Fauxhai

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CHEF DEVELOPMENT KIT: CHEFSPEC

https://github.com/sethvargo/chefspec/tree/master/examples

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CHEF DEVELOPMENT KIT: CHEFSPECrequire 'chefspec' !describe 'apt_package::install' do let(:chef_run) { ChefSpec::Runner.new.converge(described_recipe) } ! it 'installs a apt_package with the default action' do expect(chef_run).to install_apt_package('default_action') expect(chef_run).to_not install_apt_package('not_default_action') end end

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HONORABLE MENTIONS

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SERVERSPEC

• Built on RSpec• Uses SSH to test your servers’ state

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SERVERSPECdescribe package('httpd') do it { should be_installed } end !describe service('httpd') do it { should be_enabled } it { should be_running } end !describe port(80) do it { should be_listening } end

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https://github.com/paulczar/meez

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RUBOCOP: STYLE

RUBY STYLE GUIDE

• code layout• strings• syntax

• regex• more

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GUARD: TEST WHILE YOU WORK

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source 'https://rubygems.org' !gem 'berkshelf' gem 'chef' gem 'meez' gem 'guard' gem 'guard-‐kitchen' gem 'rubocop' gem 'foodcritic' gem 'chefspec' gem 'test-‐kitchen' gem 'kitchen-‐rackspace' gem 'kitchen-‐openstack'

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GET TO THE OPENSTACK STUFF

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source 'https://rubygems.org' !gem 'berkshelf' gem 'chef' gem 'meez' gem 'guard' gem 'guard-‐kitchen' gem 'rubocop' gem 'foodcritic' gem 'chefspec' gem 'test-‐kitchen' gem 'kitchen-‐rackspace' gem 'kitchen-‐openstack'

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DEMO TIME!

#rackstackatl54

#rackstackatl55

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162.242.253.111LET’S PLAY ON THE CLOUD

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WE’RE HIRING

http://rackertalent.com

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Hart Hoover @hhoover

making tdd [somewhat] bearable on openstack

Technology