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General use of Docker

Setup Docker​

  • Add the following files to root of project:

    • docker-compose.yml
    • .env
    • docker/dev/Dockerfile

  • Adapt the content of the files for your specific project.

Build the docker image with the command:

docker compose build

Ruby on Rails App

Bundle install gems with the command:

docker compose run <name_app_web> bundle install

Create Database:

docker compose run <name_app_web> bundle exec rake db:create

If you have error like network not found run the command:

docker network create <name_of_network>

Import the db:

  • PostgreSql
psql --dbname <db_name> --host 127.0.0.1 --username postgres --port 5442 --file <db_name_backup.sql>
  • MySql
mysql -u root -p --host 127.0.0.1 --port 3307 <db_name> < <db_name_backup.sql>

Start the container and the app:

docker compose up

Useful commands​

Get the container ID

docker ps

Open the docker bash:

docker exec -it <container-id> bash

Run the rails console:

docker compose run --rm <name_app_web> bin/rails c

Run any rails / rake commands with:

docker compose run --rm <name_app_web> bundle exec <command>