Increase Ansible role development velocity by coupling Molecule framework with Docker
Ansible is an agentless open-source automation tool including configuration management, application deployment, and infrastructure orchestration through playbooks running tasks sequentially :
---
- name: Install and Start Apache # Name of the playbook
hosts: webservers # Host group name
tasks:
# Play to install apache with yum module
- name: Ensure apache is installed
yum:
name: httpd
state enabled
# Play to start apache with service module
- name: Ensure apache is running
service:
name: httpd
state: startedOver time the complexity of playbooks can begin hard to read and complex to maintain. In addition, you can have some redundant blocks reused in multiple playbooks. This is where the role concept comes into action by providing an independent component that is reusable. A role has its own structure and clearly defined objective :
$ ansible-galaxy init apache
- apache was created successfully
$ $ tree apache
my-role
├── README.md
├── defaults
│ └── main.yml
├── files
├── handlers
│ └── main.yml
├── meta
│ └── main.yml
├── tasks
│ └── main.yml
├── templates
└── vars
└── main.yml
8 directories, 8 files- The defaults directory contains the default variables for the role. Variables here have the lowest priority and can be overridden.
- The files directory contains files targeted to be copied to target hosts
- The handlers directory contains handlers that can be invoked by notify instruction by a service
- The meta directory contains metadata of the role like the author, supported platforms, and dependencies
- The tasks directory contains the list of steps executed by the role
- The templates directory contains file templates using the Jinja2 templating language
The role is usable in playbooks in this way :
---
- name: Install and Configure Apache Web Servers
hosts: webservers
roles:
- role: apache
vars:
version: 2.4.48
Roles can be considered as classical software modules and should be separately tested. For testing purposes, Molecule provides a framework supporting multiple platforms like virtual machines or containers. In this article, we are going to install Molecule to work with Docker and develop a fully testable WordPress. It will also include unit tests with TestInfra to ensure what is done is well what is expected. The final goal will be to create a Docker image but you can use Docker for testing to target another platform.
Installing Molecule With Docker Support
Assuming you have python installed with pip :
pip install --user ansible==2.9 molecule[docker] pytest-testinfra==6.3.0 pytest==6.2.4Check molecule is working :
molecule --versionInitialize WordPress Role With Molecule
Molecule is able to generate the full role structured with Docker and TestInfra supports:
$ molecule init role -d docker --verifier-name testinfra wordpress
$ tree wordpress
├── README.md
├── defaults
│ └── main.yml
├── files
├── handlers
│ └── main.yml
├── meta
│ └── main.yml
├── molecule
│ └── default
│ ├── converge.yml
│ ├── molecule.yml
│ └── tests
│ ├── conftest.py
│ └── test_default.py
├── tasks
│ └── main.yml
├── templates
├── tests
│ ├── inventory
│ └── test.yml
└── vars
└── main.yml
12 directories, 14 filesIt uses previous ansible-galaxy command behind the scene and then injects molecule directory and asked dependencies. The molecule/default directory contains the default test scenario :
molecule.ymlcontains the configuration telling which platform to use, how to lint the role etc. We will see it in the section.converge.ymlis the playbook in the test sequence running your roletestscontains basic TestInfra unit tests to run additional verification of the result after Ansible got the job done.
Configure Molecule
In the Molecule configuration, we add the filenames of the role and collection dependency files. The test sequence is the default generated by the previous molecule command. For the platform, we use php:7.2-apache as the base image to configure WordPress. A Jinja2 Dockerfile is specified to add extra packages in the base image :
---
dependency:
name: galaxy
options:
ignore-certs: True
ignore-errors: True
role-file: requirements.yml
requirements-file: collections.yml
driver:
name: docker
platforms:
- name: wordpress
image: php:7.2-apache
dockerfile: ../common/Dockerfile.j2
test_sequence:
- lint
- destroy
- dependency
- syntax
- create
- converge
- idempotence
- verify
- destroy
provisioner:
name: ansible
lint: |
yamllint .
ansible-lint
flake8
config_options:
defaults:
remote_tmp: /tmp/.ansible
verifier:
name: testinfra---
collections:
- community.general---
roles: []The converge playbook is redefined to include the WordPress role and the needed collection :
---
- name: Converge
hosts: all
collections:
- community.general
tasks:
- name: Include wordpress role
include_role:
name: wordpress{% if item.registry is defined %}
FROM {{ item.registry.url }}/{{ item.image }}
{% else %}
FROM {{ item.image }}
{% endif %}
{% if item.env is defined %}
{% for var, value in item.env.items() %}
{% if value %}
ENV {{ var }} {{ value }}
{% endif %}
{% endfor %}
{% endif %}
RUN apt update -y && \
apt install -y bash ca-certificates curl python3 python3-apt sudo vim sudoAutomate WordPress Installation on Docker
The apache user and group are grouped into the defaults to avoid repetition :
---
# defaults file for test
apache_user: www-data
apache_group: www-dataThe task file contains the configuration recipe of the WordPress role. wp-cli to installs and configures WordPress when the container is started through an entrypoint file :
---
# tasks file for wordpress
- name: Wordpress | Enable apache mod expires
command: a2enmod rewrite expires
changed_when: "'molecule-idempotence-notest' not in ansible_skip_tags"
- name: Wordpress | Install prerequisites packages
apt:
name: ["aptitude", "wget", "libpng-dev", "libjpeg-dev", "libjpeg62-turbo-dev", "libfreetype6-dev",
"gnupg", "mariadb-client"]
update_cache: yes
state: present
force_apt_get: yes
tags: package
- name: Wordpress | Find all files in apt cache
find:
paths: /var/lib/apt/lists
recurse: yes
register: files_to_delete
- name: Wordpress | Clean apt cache
file:
command: "{{ item.path }}"
state: absent
with_items: "{{ files_to_delete.files }}"
changed_when: "'molecule-idempotence-notest' not in ansible_skip_tags"
- name: Wordpress | Clean apt
command: apt clean
changed_when: "'molecule-idempotence-notest' not in ansible_skip_tags"
- name: Wordpress | Add jpeg and freetype support
command: docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/
changed_when: "'molecule-idempotence-notest' not in ansible_skip_tags"
- name: Wordpress | Add MySQL support
command: docker-php-ext-install gd mysqli
changed_when: "'molecule-idempotence-notest' not in ansible_skip_tags"
- name: Wordpress | Configure php.ini
template:
src: php.ini.j2
dest: /usr/local/etc/php/php.ini
owner: "{{ apache_user }}"
group: "{{ apache_group }}"
mode: 0644
- name: Wordpress | Download wp-cli
get_url:
url: https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar
dest: /usr/local/bin/wp
mode: 0750
- name: Wordpress | Configure entrypoint
copy:
src: files/entrypoint.sh
dest: /opt/entrypoint.sh
mode: 0750There is also a template file to configure PHP settings :
date.timezone = Europe/ParisThe entrypoint is a bash script passing variables from the docker command line to the container's environment variables. The variables are then loaded to the WordPress server. This avoids storing sensitive data and having static configuration inside the Docker image :
#!/usr/bin/env bash
set -eu
if [[ "$1" == apache2* ]] || [ "$1" == php-fpm ]; then
: ${WP_DB_WAIT_TIME:=${WP_DB_WAIT_TIME:-20}}
: ${WP_VERSION:=${WP_VERSION:-4.6.1}}
: ${WP_DOMAIN:=${WP_DOMAIN:-localhost}}
: ${WP_URL:=${WP_URL:-http://localhost}}
: ${WP_LOCALE:=${WP_LOCALE:-en_US}}
: ${WP_SITE_TITLE:=${WP_SITE_TITLE:-WordPress for development}}
: ${WP_ADMIN_USER:=${WP_ADMIN_USER:-admin}}
: ${WP_ADMIN_PASSWORD:=${WP_ADMIN_PASSWORD:-admin}}
: ${WP_ADMIN_EMAIL:=${WP_ADMIN_EMAIL:[email protected]}}
: ${WP_DB_HOST:=mysql}
: ${WP_DB_USER:=${MYSQL_ENV_MYSQL_USER:-root}}
sleep ${WP_DB_WAIT_TIME}
if [ "$WP_DB_USER" = 'root' ]; then
: ${WP_DB_PASSWORD:=$MYSQL_ENV_MYSQL_ROOT_PASSWORD}
fi
: ${WP_DB_PASSWORD:=$MYSQL_ENV_MYSQL_PASSWORD}
: ${WP_DB_NAME:=${MYSQL_ENV_MYSQL_DATABASE:-wordpress}}
if [ -z "$WP_DB_PASSWORD" ]; then
echo >&2 'error: missing required WP_DB_PASSWORD environment variable'
exit 1
fi
wp cli --allow-root update --nightly --yes
# Download WordPress.
wp core --allow-root download \
--version=${WP_VERSION} \
--force --debug
if -f /var/www/html/wp-config; then
rm -f /var/www/html/wp-config
fi
# Generate the wp-config file for debugging.
wp core --allow-root config \
--dbhost="$WP_DB_HOST" \
--dbname="$WP_DB_NAME" \
--dbuser="$WP_DB_USER" \
--dbpass="$WP_DB_PASSWORD" \
--locale="$WP_LOCALE" \
--extra-php <<PHP
define('WP_DEBUG', true );
define('WP_DEBUG_LOG', true );
PHP
if ! wp --allow-root db check; then
# Create the database.
wp db --allow-root create
fi
if ! wp core is-installed; then
wp core --allow-root install \
--url="${WP_URL}" \
--title="${WP_SITE_TITLE}" \
--admin_user="${WP_ADMIN_USER}" \
--admin_password="${WP_ADMIN_PASSWORD}" \
--admin_email="${WP_ADMIN_EMAIL}" \
--skip-email
# Add domain to hosts file. Required for Boot2Docker.
echo "127.0.0.1 ${WP_DOMAIN}" >> /etc/hosts
fi
fi
echo >&2 "Access the WordPress admin panel here ${WP_URL}"
exec "[email protected]"Implement TestInfra Unit Tests
We use TestInfra to ensure templates and files are well present with good permissions :
"""Role testing files using testinfra."""
APACHE_USER = "www-data"
APACHE_GROUP = "www-data"
def test_php_ini(host):
php_ini = host.file("/usr/local/etc/php/php.ini")
assert php_ini.user == APACHE_USER
assert php_ini.group == APACHE_GROUP
assert php_ini.mode == 0o644
def test_wp_cli(host):
wp_cli = host.file("/usr/local/bin/wp")
assert wp_cli.mode == 0o750
def test_entrypoint(host):
entrypoint = host.file("/opt/entrypoint.sh")
assert entrypoint.exists
assert entrypoint.mode == 0o750TestInfra has a lot of modules to make extra verifications. You can check it out here.
Test WordPress Role With Molecule
The molecule test command executes all the test sequences defined before in the configuration file :
$ molecule test
INFO default scenario test matrix: dependency, lint, cleanup, destroy, syntax, create, prepare, converge, idempotence, side_effect, verify, cleanup, destroy
INFO Performing prerun...
INFO Running ansible-galaxy role install --roles-path /home/vagrant/.cache/ansible-lint/48cbf3/roles -vr requirements.yml
INFO Using /home/vagrant/.cache/ansible-lint/48cbf3/roles/guivin.wordpress_docker symlink to current repository in order to enable Ansible to find the role using its expected full name.
INFO Added ANSIBLE_ROLES_PATH=~/.ansible/roles:/usr/share/ansible/roles:/etc/ansible/roles:/home/vagrant/.cache/ansible-lint/48cbf3/roles
INFO Running default > dependency
INFO Dependency completed successfully.
Process install dependency map
|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-Starting collection install process
|Installing 'community.general:3.4.0' to '/home/vagrant/.cache/molecule/wordpress/default/collections/ansible_collections/community/general'
/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\|/-\
INFO Dependency completed successfully.
INFO Running default > lint
INFO Lint is disabled.
INFO Running default > cleanup
WARNING Skipping, cleanup playbook not configured.
INFO Running default > destroy
INFO Sanity checks: 'docker'
PLAY [Destroy] *******************************************************************************************************************************************************************************************
TASK [Destroy molecule instance(s)] **********************************************************************************************************************************************************************
changed: [localhost] => (item=wordpress)
TASK [Wait for instance(s) deletion to complete] *********************************************************************************************************************************************************
ok: [localhost] => (item={'started': 1, 'finished': 0, 'ansible_job_id': '629242891697.541', 'results_file': '/home/vagrant/.ansible_async/629242891697.541', 'changed': True, 'failed': False, 'item': {'dockerfile': '../common/Dockerfile.j2', 'image': 'php:7.2-apache', 'name': 'wordpress', 'privileged': True}, 'ansible_loop_var': 'item'})
TASK [Delete docker network(s)] **************************************************************************************************************************************************************************
PLAY RECAP ***********************************************************************************************************************************************************************************************
localhost : ok=2 changed=1 unreachable=0 failed=0 skipped=1 rescued=0 ignored=0
INFO Running default > syntax
playbook: /vagrant/roles/wordpress/molecule/default/converge.yml
INFO Running default > create
PLAY [Create] ********************************************************************************************************************************************************************************************
TASK [Log into a Docker registry] ************************************************************************************************************************************************************************
skipping: [localhost] => (item={'dockerfile': '../common/Dockerfile.j2', 'image': 'php:7.2-apache', 'name': 'wordpress', 'privileged': True})
TASK [Check presence of custom Dockerfiles] **************************************************************************************************************************************************************
ok: [localhost] => (item={'dockerfile': '../common/Dockerfile.j2', 'image': 'php:7.2-apache', 'name': 'wordpress', 'privileged': True})
TASK [Create Dockerfiles from image names] ***************************************************************************************************************************************************************
changed: [localhost] => (item={'dockerfile': '../common/Dockerfile.j2', 'image': 'php:7.2-apache', 'name': 'wordpress', 'privileged': True})
TASK [Discover local Docker images] **********************************************************************************************************************************************************************
ok: [localhost] => (item={'diff': [], 'dest': '/home/vagrant/.cache/molecule/wordpress/default/Dockerfile_php_7_2_apache', 'src': '/tmp/.ansible/ansible-tmp-1627924793.4338043-252280101443736/source', 'md5sum': 'c40449541cb68c8437655b9e442a99d2', 'checksum': 'dc3f26f3835156f5648b1bbd65c390220fe944ca', 'changed': True, 'uid': 1000, 'gid': 1000, 'owner': 'vagrant', 'group': 'vagrant', 'mode': '0600', 'state': 'file', 'size': 122, 'invocation': {'module_args': {'src': '/tmp/.ansible/ansible-tmp-1627924793.4338043-252280101443736/source', 'dest': '/home/vagrant/.cache/molecule/wordpress/default/Dockerfile_php_7_2_apache', 'mode': '0600', 'follow': False, '_original_basename': 'Dockerfile.j2', 'checksum': 'dc3f26f3835156f5648b1bbd65c390220fe944ca', 'backup': False, 'force': True, 'content': None, 'validate': None, 'directory_mode': None, 'remote_src': None, 'local_follow': None, 'owner': None, 'group': None, 'seuser': None, 'serole': None, 'selevel': None, 'setype': None, 'attributes': None, 'regexp': None, 'delimiter': None, 'unsafe_writes': None}}, 'failed': False, 'item': {'dockerfile': '../common/Dockerfile.j2', 'image': 'php:7.2-apache', 'name': 'wordpress', 'privileged': True}, 'ansible_loop_var': 'item', 'i': 0, 'ansible_index_var': 'i'})
TASK [Build an Ansible compatible image (new)] ***********************************************************************************************************************************************************
ok: [localhost] => (item=molecule_local/php:7.2-apache)
TASK [Create docker network(s)] **************************************************************************************************************************************************************************
TASK [Determine the CMD directives] **********************************************************************************************************************************************************************
ok: [localhost] => (item={'dockerfile': '../common/Dockerfile.j2', 'image': 'php:7.2-apache', 'name': 'wordpress', 'privileged': True})
TASK [Create molecule instance(s)] ***********************************************************************************************************************************************************************
changed: [localhost] => (item=wordpress)
TASK [Wait for instance(s) creation to complete] *********************************************************************************************************************************************************
FAILED - RETRYING: Wait for instance(s) creation to complete (300 retries left).
changed: [localhost] => (item={'started': 1, 'finished': 0, 'ansible_job_id': '553950933721.739', 'results_file': '/home/vagrant/.ansible_async/553950933721.739', 'changed': True, 'failed': False, 'item': {'dockerfile': '../common/Dockerfile.j2', 'image': 'php:7.2-apache', 'name': 'wordpress', 'privileged': True}, 'ansible_loop_var': 'item'})
PLAY RECAP ***********************************************************************************************************************************************************************************************
localhost : ok=7 changed=3 unreachable=0 failed=0 skipped=2 rescued=0 ignored=0
INFO Running default > prepare
WARNING Skipping, prepare playbook not configured.
INFO Running default > converge
PLAY [Converge] ******************************************************************************************************************************************************************************************
TASK [Gathering Facts] ***********************************************************************************************************************************************************************************
ok: [wordpress]
TASK [Include wordpress role] ****************************************************************************************************************************************************************************
TASK [wordpress : Wordpress | Enable apache mod expires] *************************************************************************************************************************************************
changed: [wordpress]
TASK [wordpress : Wordpress | Install prerequisites packages] ********************************************************************************************************************************************
changed: [wordpress]
TASK [wordpress : Wordpress | Find all files in apt cache] ***********************************************************************************************************************************************
ok: [wordpress]
TASK [wordpress : Wordpress | Clean apt cache] ***********************************************************************************************************************************************************
changed: [wordpress] => (item={'path': '/var/lib/apt/lists/security.debian.org_debian-security_dists_buster_updates_InRelease', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 65372, 'inode': 262381, 'dev': 2049, 'nlink': 1, 'atime': 1627862493.0, 'mtime': 1627862493.0, 'ctime': 1627924810.2230368, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [wordpress] => (item={'path': '/var/lib/apt/lists/security.debian.org_debian-security_dists_buster_updates_main_binary-amd64_Packages.lz4', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 581052, 'inode': 262389, 'dev': 2049, 'nlink': 1, 'atime': 1627843047.0, 'mtime': 1627843047.0, 'ctime': 1627924810.2230368, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [wordpress] => (item={'path': '/var/lib/apt/lists/deb.debian.org_debian_dists_buster-updates_InRelease', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 51901, 'inode': 262383, 'dev': 2049, 'nlink': 1, 'atime': 1627913428.0, 'mtime': 1627913428.0, 'ctime': 1627924810.2230368, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [wordpress] => (item={'path': '/var/lib/apt/lists/deb.debian.org_debian_dists_buster_InRelease', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 121562, 'inode': 262382, 'dev': 2049, 'nlink': 1, 'atime': 1624095664.0, 'mtime': 1624095664.0, 'ctime': 1627924809.9148827, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [wordpress] => (item={'path': '/var/lib/apt/lists/deb.debian.org_debian_dists_buster-updates_main_binary-amd64_Packages.diff_Index', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 7624, 'inode': 262384, 'dev': 2049, 'nlink': 1, 'atime': 1624457148.0, 'mtime': 1624457148.0, 'ctime': 1627924810.2230368, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [wordpress] => (item={'path': '/var/lib/apt/lists/lock', 'mode': '0640', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 0, 'inode': 262378, 'dev': 2049, 'nlink': 1, 'atime': 1624282938.0, 'mtime': 1624282938.0, 'ctime': 1627924809.7267888, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': False, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [wordpress] => (item={'path': '/var/lib/apt/lists/deb.debian.org_debian_dists_buster-updates_main_binary-amd64_Packages.lz4', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 26620, 'inode': 262390, 'dev': 2049, 'nlink': 1, 'atime': 1619186242.0, 'mtime': 1624457148.0, 'ctime': 1627924810.2230368, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [wordpress] => (item={'path': '/var/lib/apt/lists/deb.debian.org_debian_dists_buster_main_binary-amd64_Packages.lz4', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 16782139, 'inode': 778958, 'dev': 2049, 'nlink': 1, 'atime': 1624093156.0, 'mtime': 1624093156.0, 'ctime': 1624282975.5261908, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
TASK [wordpress : Wordpress | Add jpeg and freetype support] *********************************************************************************************************************************************
changed: [wordpress]
TASK [wordpress : Wordpress | Add MySQL support] *********************************************************************************************************************************************************
changed: [wordpress]
TASK [wordpress : Wordpress | Configure php.ini] *********************************************************************************************************************************************************
changed: [wordpress]
TASK [wordpress : Wordpress | Download wp-cli] ***********************************************************************************************************************************************************
changed: [wordpress]
TASK [wordpress : Wordpress | Configure entrypoint] ******************************************************************************************************************************************************
changed: [wordpress]
PLAY RECAP ***********************************************************************************************************************************************************************************************
wordpress : ok=10 changed=8 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
INFO Running default > idempotence
PLAY [Converge] ******************************************************************************************************************************************************************************************
TASK [Gathering Facts] ***********************************************************************************************************************************************************************************
ok: [wordpress]
TASK [Include wordpress role] ****************************************************************************************************************************************************************************
TASK [wordpress : Wordpress | Enable apache mod expires] *************************************************************************************************************************************************
ok: [wordpress]
TASK [wordpress : Wordpress | Install prerequisites packages] ********************************************************************************************************************************************
ok: [wordpress]
TASK [wordpress : Wordpress | Find all files in apt cache] ***********************************************************************************************************************************************
ok: [wordpress]
TASK [wordpress : Wordpress | Clean apt cache] ***********************************************************************************************************************************************************
ok: [wordpress] => (item={'path': '/var/lib/apt/lists/security.debian.org_debian-security_dists_buster_updates_InRelease', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 65372, 'inode': 262375, 'dev': 2049, 'nlink': 1, 'atime': 1627862493.0, 'mtime': 1627862493.0, 'ctime': 1627924862.6932588, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
ok: [wordpress] => (item={'path': '/var/lib/apt/lists/deb.debian.org_debian_dists_buster_main_binary-amd64_Packages.lz4', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 16782139, 'inode': 262378, 'dev': 2049, 'nlink': 1, 'atime': 1624093156.0, 'mtime': 1624093156.0, 'ctime': 1627924862.6852548, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
ok: [wordpress] => (item={'path': '/var/lib/apt/lists/security.debian.org_debian-security_dists_buster_updates_main_binary-amd64_Packages.lz4', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 581052, 'inode': 262402, 'dev': 2049, 'nlink': 1, 'atime': 1627843047.0, 'mtime': 1627843047.0, 'ctime': 1627924862.6932588, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
ok: [wordpress] => (item={'path': '/var/lib/apt/lists/deb.debian.org_debian_dists_buster-updates_InRelease', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 51901, 'inode': 262403, 'dev': 2049, 'nlink': 1, 'atime': 1627913428.0, 'mtime': 1627913428.0, 'ctime': 1627924862.6932588, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
ok: [wordpress] => (item={'path': '/var/lib/apt/lists/deb.debian.org_debian_dists_buster_InRelease', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 121562, 'inode': 262400, 'dev': 2049, 'nlink': 1, 'atime': 1624095664.0, 'mtime': 1624095664.0, 'ctime': 1627924862.6812527, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
ok: [wordpress] => (item={'path': '/var/lib/apt/lists/lock', 'mode': '0640', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 0, 'inode': 262352, 'dev': 2049, 'nlink': 1, 'atime': 1627924859.8478367, 'mtime': 1627924859.8478367, 'ctime': 1627924859.8478367, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': False, 'xoth': False, 'isuid': False, 'isgid': False})
ok: [wordpress] => (item={'path': '/var/lib/apt/lists/deb.debian.org_debian_dists_buster-updates_main_binary-amd64_Packages.lz4', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 26620, 'inode': 262383, 'dev': 2049, 'nlink': 1, 'atime': 1624456683.0, 'mtime': 1624456683.0, 'ctime': 1627924862.6932588, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
TASK [wordpress : Wordpress | Add jpeg and freetype support] *********************************************************************************************************************************************
ok: [wordpress]
TASK [wordpress : Wordpress | Add MySQL support] *********************************************************************************************************************************************************
ok: [wordpress]
TASK [wordpress : Wordpress | Configure php.ini] *********************************************************************************************************************************************************
ok: [wordpress]
TASK [wordpress : Wordpress | Download wp-cli] ***********************************************************************************************************************************************************
ok: [wordpress]
TASK [wordpress : Wordpress | Configure entrypoint] ******************************************************************************************************************************************************
ok: [wordpress]
PLAY RECAP ***********************************************************************************************************************************************************************************************
wordpress : ok=10 changed=0 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
INFO Idempotence completed successfully.
INFO Running default > side_effect
WARNING Skipping, side effect playbook not configured.
INFO Running default > verify
INFO Executing Testinfra tests found in /vagrant/roles/wordpress/molecule/default/tests/...
============================= test session starts ==============================
platform linux -- Python 3.9.4, pytest-6.2.4, py-1.10.0, pluggy-0.13.1
rootdir: /
plugins: testinfra-6.3.0
collected 3 items
molecule/default/tests/test_default.py ... [100%]
============================== 3 passed in 1.85s ===============================
INFO Verifier completed successfully.
INFO Running default > cleanup
WARNING Skipping, cleanup playbook not configured.
INFO Running default > destroy
PLAY [Destroy] *******************************************************************************************************************************************************************************************
TASK [Destroy molecule instance(s)] **********************************************************************************************************************************************************************
changed: [localhost] => (item=wordpress)
TASK [Wait for instance(s) deletion to complete] *********************************************************************************************************************************************************
FAILED - RETRYING: Wait for instance(s) deletion to complete (300 retries left).
changed: [localhost] => (item={'started': 1, 'finished': 0, 'ansible_job_id': '369932584169.31439', 'results_file': '/home/vagrant/.ansible_async/369932584169.31439', 'changed': True, 'failed': False, 'item': {'dockerfile': '../common/Dockerfile.j2', 'image': 'php:7.2-apache', 'name': 'wordpress', 'privileged': True}, 'ansible_loop_var': 'item'})
TASK [Delete docker network(s)] **************************************************************************************************************************************************************************
PLAY RECAP ***********************************************************************************************************************************************************************************************
localhost : ok=2 changed=2 unreachable=0 failed=0 skipped=1 rescued=0 ignored=0
INFO Pruning extra files from scenario ephemeral directoryYou can execute the specific step of the test sequence by replacing the test argument with the step you want (e.g molecule converge).
Conclusion
Coupling Molecule with Docker increases the development velocity of Ansible roles. In addition, using a local Docker daemon doesn't add additional cost contrary to using virtual machines in the cloud. Molecule offers the opportunity to run tests on-demand to inspect there is no regression. When detected they can be easily identified and fixed before any deployment.
In the article here, you will discover how to reuse this role to build the WordPress Docker with Packer
Resources
Ansible Molecule — Molecule 3.3.5.dev14 documentation
Intro to playbooks — Ansible Documentation
Roles — Ansible Documentation
Testinfra test your infrastructure — testinfra 6.4.1.dev1+g05df015.d20210704 documentation
