A basic Docker configuration for a Rails app

Overview

The Dockerfile provides a basic image based on ruby.

The docker-compose.yml provides the following services:

• a web service serving your rails application (built from Dockerfile)
• a webpack_dev_server service serving your assets from webpack (built from Dockerfile)
• a redis server (built from official redis docker image)
• a database' server (built from official postgresql` docker image)

Configure to your needs

You can change database name in .env/development/database.

Adapt project's database configuration

-- config/database.yml
default: &default
  adapter: postgresql
  encoding: unicode
  # For details on connection pooling, see Rails configuration guide
  # https://guides.rubyonrails.org/configuring.html#database-pooling
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  host: <%= ENV.fetch("DATABASE_HOST") %>
  username: <%= ENV.fetch("POSTGRES_USER") %>
  password: <%= ENV.fetch("POSTGRES_PASSWORD") %>
  database: <%= ENV.fetch("POSTGRES_DB") %>
  variables:
    statement_timeout: 5000