atheiman

# test_cookbook/recipes/default.rb
include_recipe 'test_cookbook::included_recipe'
include_recipe 'apt'


# test_cookbook/spec/recipes/default_spec.rb
describe 'test_cookbook::default' do
  before(:all) { @included_recipes = [] }
  before do
    @stubbed_recipes = %w[test_cookbook::included_recipe apt]

atheiman

describe 'cookbook::recipe' do
  cached(:chef_run) do
    ChefSpec::ServerRunner.new.converge(described_recipe)
  end

  it 'creates home directories' do
    %w[/home/testuser1 /home/testuser2].each do |d|
      expect(chef_run).to create_directory(d)
    end
  end

atheiman

def doubles?
  a = rand(1..6)
  b = rand(1..6)
  puts "#{a} and #{b}"
  raise 'Not doubles!' unless a == b
  true
end

def with_retries(retries: 2, sleep: 1)
  attempt = 1

atheiman

Chef Cookbook Review Guide

Things to look for when reviewing cookbook pull requests (examples are linked where explanation is necessary):

1. Attributes should be preferred over literals in resource properties

2. ChefSpec unit tests are included for any logic branches in recipes

3. Any plain Ruby is defined as a library method with rspec unit tests

atheiman

Keybase proof

I hereby claim:

• I am atheiman on github.
• I am austinheiman (https://keybase.io/austinheiman) on keybase.
• I have a public key ASC2ZiWvCqeAOkMAORKrAfBc6FUubaaHaXHScebkbcth0Ao

To claim this, I am signing this object:

atheiman

# chef-nodes is useful to share a nodes attributes with other nodes. if you want to share _converged_ node
# data (more than just ip and hostname from chef-nodes) then you can use test-kitchen >= 1.20.0 which adds
# support for downloading files from nodes after converge via .kitchen.yml:
# 
# provisioner:
#   nodes_path: test/fixtures/nodes
#   downloads:
#     /tmp/kitchen/nodes: test/fixtures/
# 
# this will download node data after converge and drop it into test/fixtures/nodes/node-a.json, node-b.json, etc

atheiman

Chef Cookbook Generator

Template for creating new cookbooks with chef generate cookbook COOKBOOK_NAME --generator-cookbook:

# install `chef` utility from chef-dk if you dont already have it
gem install --no-document chef-dk

atheiman

# You run an e-commerce website and want to record the last N order ids in a log. Implement a data structure to accomplish this, with the following API:

# record(order_id): adds the order_id to the log
# get_last(i): gets the ith last element from the log. i is guaranteed to be smaller than or equal to N.

require 'rspec'

class RingBuffer < Array
  attr_reader :max

atheiman

# Run nginx docker container in background
docker run --name nginx --rm -d -p 8080:80 -v ${PWD}:/usr/share/nginx/html:ro nginx

# Load a file in curent directory
curl http://localhost:8080/index.html

# Stop the docker container (the container will be removed / cleaned up)
docker stop nginx

atheiman

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