Use Molecule and Docker to test Ansible roles

..Molecule-Docker.md

Use Molecule and Docker to test Ansible roles

Install pre-requisites.

$ which yum && sudo yum install libffi-devel python-devel python-virtualenvwrapper
$ which apt-get && sudo apt-get libffi-dev python-dev python-virtualenvwrapper

Install Docker.

$ TODO

Create a virtualenv with needed packages.

$ source /usr/bin/virtualenvwrapper.sh
$ workon molecule || mkvirtualenv molecule
(molecule)$ pip install --upgrade pip
(molecule)$ pip install --upgrade jinja2-cli docker-py molecule ansible ansible-lint ansible-MORE

• Create a .travis.yml template file for Travis-CI.

• Create the molecule.yml.j2.

• Create a Makefile and use it.

  make ubuntu_1610 make all

.travis.yml

---

# .travis.yml
#
# https://molecule.readthedocs.io/en/latest/usage.html#travis-ci

sudo: required

language: python

env:
  matrix:
    - TARGET=config_ubuntu_1610
    - TARGET=config_ubuntu_1604
    - TARGET=config_ubuntu_1404
    - TARGET=config_centos_6
    - TARGET=config_centos_7
    - TARGET=config_debian_7
    - TARGET=config_debian_8

services:
  - docker

before_install:
  - sudo apt-get -qq update
  - sudo apt-get install -o Dpkg::Options::="--force-confold" --force-yes -y docker-engine make

install:
  - pip install jinja2-cli
  - pip install testinfra
  - pip install docker-py
  - pip install ansible
  - pip install molecule
  - pip install ansible-lint

before_script:
  - make ${TARGET}

script:
  - molecule syntax
  - molecule create
  - molecule status
  - molecule converge

after_success:
  #- molecule idempotence
  - molecule verify

Makefile

molecule_steps := syntax create status converge verify

all: ubuntu_1610 ubuntu_1604 ubuntu_1404 centos_6 centos_7 debian_7 debian_8

ubuntu_1610: config_ubuntu_1610 $(molecule_steps)

ubuntu_1604: config_ubuntu_1604 $(molecule_steps)

ubuntu_1404: config_ubuntu_1404 $(molecule_steps)

centos_6: config_centos_6 $(molecule_steps)

centos_7: config_centos_7 $(molecule_steps)

debian_7: config_debian_7 $(molecule_steps)

debian_8: config_debian_8 $(molecule_steps)


config_ubuntu_1610:
        echo '{}' | jinja2 -DIMAGE_NAME=ubuntu -DIMAGE_VERSION=16.10 molecule.yml.j2 > molecule.yml

config_ubuntu_1604:
        echo '{}' | jinja2 -DIMAGE_NAME=ubuntu -DIMAGE_VERSION=16.04 molecule.yml.j2 > molecule.yml

config_ubuntu_1404:
        echo '{}' | jinja2 -DIMAGE_NAME=ubuntu -DIMAGE_VERSION=14.04 molecule.yml.j2 > molecule.yml

config_centos_6:
        echo '{}' | jinja2 -DIMAGE_NAME=centos -DIMAGE_VERSION=6 molecule.yml.j2 > molecule.yml

config_centos_7:
        echo '{}' | jinja2 -DIMAGE_NAME=mjuenema/centos7 -DIMAGE_VERSION=latest molecule.yml.j2 > molecule.yml

config_debian_7:
        echo '{}' | jinja2 -DIMAGE_NAME=debian -DIMAGE_VERSION=7 molecule.yml.j2 > molecule.yml

config_debian_8:
        echo '{}' | jinja2 -DIMAGE_NAME=debian -DIMAGE_VERSION=8 molecule.yml.j2 > molecule.yml

$(molecule_steps):
        molecule $@

molecule-docker-molecule.yml.j2

---
# molecule.yml.j2
#
# This file will be converted to molecule.yml in .travis.yml.

ansible:
  verbose: 'vvvv'
driver:
  name: docker
docker:
  containers:
    # IMAGE_NAME and IMAGE_VERSION
    - name: ansible-role-postinstall
      image: {{IMAGE_NAME}}
      image_version: '{{IMAGE_VERSION}}'
      {% if IMAGE_NAME in ['mjuenema/centos7'] -%}
      privileged: true
      volume_mounts:
        - /sys/fs/cgroup:/sys/fs/cgroup:ro
      cap_add:
        - SYS_ADMIN
      {% endif -%}
verifier:
  name: testinfra