Role used to download, configure and run docker container with rails app, before running app role runs migrations
Ubuntu 14.04 is tested.
This role uses Ansible's docker module, so requirements are the same.
Here is the list of Required variables with default values:
# Docker repository image and tag
app_docker_image: 'alpine'
app_docker_image_tag: 'latest'
#Name of the container when it's running
app_container_name: 'rails'
# List of exposed ports for container
app_ports_mapping: []
#Command to run in docker
app_command: 'bundle exec rails s'
# Dict of environment variables
app_environment_vars: {}
# Configuration files to deploy on server and mount to image
app_configuration_files: {}If you pulling image from private docker repository - specify docker credentials:
# Docker credentials for private image
app_docker_login: 'login'
app_docker_password: 'password'
app_docker_email: 'email'These variables are optional and can be changed if needed
# Environment to run rails
app_environment: production
# Folder with all config files on local machine
app_files_local_folder: './files'
#Force image pull
app_force_image_pull: true
#Docker container restart policy
app_container_restart_policy: always
#Migration command
app_migration_command: 'bundle exec rake db:migrate'
#Container memory limit
container_memory_limit: 1gNo dependencies
Simpliest playbook can be following:
- hosts: webservers
roles:
- role: rails-container-app
app_docker_image: 'maticinsurace/rails-app'
app_docker_tag: 'latest'
app_ports_mapping: ['3000:3000']This playbook will pull image maticinsurace/rails-app:latest,
run migrations bundle exec rake db:migrate and start rails app bundle exec rails s
If you want to specify additional environment variables:
- hosts: webservers
roles:
- role: rails-container-app
app_command: 'bundle exec sidekiq'
app_environment_vars:
REDIS_URL: redis://redis.host:6379
DATABASE_URL: postgress://db.host:5432THis will execute sidekiq and add redis/postgress variables
If you want custom files to be deployed to the app:
- hosts: webservers
roles:
- role: rails-container-app
app_files_local_folder: './files/webserver'
app_configuration_files:
settings.yaml: /app/config/settings.local.yaml
apns_cert.pem: certs/apns.pemThis will read file from local machine using key as path after app_files_local_folder
and mount them to docker image using value as path. E.g ./files/webserver/settings.yaml
will be mounted as /app/config/settings.local.yam:ro
The same way you can render Jinja2 templates via app_configuration_templates:
- hosts: webservers
roles:
- role: rails-container-app
app_templates_local_folder: './templates/webserver'
app_configuration_templates:
settings.local.yml.j2: /app/config/settings.local.ymlMIT
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