How to test cookbooks in chef using test kitchen and Docker?

Using Kitchen-Docker Driver to test cookbooks

• In this series lets understand how to use docker instances to verify chef cookbooks
• Using docker to test cookbooks drastically simplifies testing various environments and reduces cost
• So we would be using the test kitchen driver which is a docker
• For demonstrating this, I am using the ubuntu virtual machine as chef workstation
• So lets start with installing the chefdk on the ubuntu virtual machine
• Download the current release of chef dk from here and install it . I will be downloading the deb file since my workstation is ubuntu 18

cd /tmp
wget https://packages.chef.io/files/stable/chefdk/4.7.73/ubuntu/18.04/chefdk_4.7.73-1_amd64.deb
sudo dpkg -i /tmp/chefdk_4.7.73-1_amd64.deb

• one the chefdk is installed, check the installation using version command chef --version
• Now since we would be using docker as a driver, lets install docker using docker shell script from here

cd /tmp
curl -fsSL https://get.docker.com -o get-docker.sh
sh get-docker.sh
sudo usermod -aG docker $USER

• Now exit and relogin into the linux system.
• Create a chef cookbook

chef generate cookbook -b kitchendockerdemo
cd kitchendockerdemo\

• Now install kitchen-docker gem using the following command

chef gem install kitchen-docker

• Now change kitchen.yml file to match the driver specifications are mentioned over here

---
driver:
  name: docker

provisioner:
  name: chef_zero
  always_update_cookbooks: true

verifier:
  name: inspec

platforms:
  - name: ubuntu
  - name: centos
    driver_config:
      image: centos:7
      platform: centos

transport:
  name: docker

suites:
  - name: default
    run_list:
      - recipe[kitchendockerdemo::default]
    verifier:
      inspec_tests:
        - test/integration/default
    attributes:

• Now add some code to default.rb in recipes

#
# Cookbook:: kitchendockerdemo
# Recipe:: default
#
# Copyright:: 2020, The Authors, All Rights Reserved.
file '/tmp/readme.txt' do
        content 'Created for demo'
        action :create
end

• Now execute the following commands
  • List kitchen test environments using the command kitchen list
  • Create test environments using the command kitchen create
  • Now List kitchen test environments using the command to know status kitchen list
  • Converge the test environments using command kitchen converge
  • Now List kitchen test environments using the command to know status kitchen list
  • Once you have finished testing the cookbook, destroy the instances using kitchen destroy