The container is based on phusion/baseimage-docker and has ruby 2.1.1 installed. It is intended for local development.
Services installed and running:
- Postgresql 9.1
- Redis
- Memcache
How it works
You rails application needs to be mounted to /rails_app or the container won’t work properly.
You’ll need to have a docker directory at the root of your project. Inside this directory, create a bundle directory and a run.sh script.
Write any commands needed to boot your app in the run.sh script and know that the following commands are executed automatically before invoking the run.sh script:
- bundle install
- rake db:create
- rake db:migrate
How to use
Just run the container like this (example with our Tadaam app):
$ docker run -t -i -v ~/Coding/tadam:/rails_app -p 3000:3000 -p 3001:3001 studiomelipone/ruby:2.1
This will automatically boot our Rails app and forward ports 3000 and 3001 to the host.
Persistant DB
It is possible to keep the DB between runs, just mount a directory that Postgresql will use at /var/lib/postgresql. Example:
$ docker run -t -i -v ~/Coding/tadam:/rails_app -v ~/Coding/tadam/docker/postgresql:/var/lib/postgresql -p 3000:3000 -p 3001:3001 studiomelipone/ruby:2.1
Don’t worry about an empty directory on the first run, the container will create a new PG database for you.
Accessing the DB
A role for root is created automatically and has all the permissions on the DB. So a typical database.yml could look like this:
development:
adapter: postgresql
encoding: unicode
database: tadaam_development
pool: 5
username: root