Dockerfile

Readme.md

Rails dev environmnent:

This will build the local Dockerfile:

  docker-compose build --no-cache

Get the rails app running on the background:

  docker-compose up -d app

Enter rails console (within running container)

docker-compose exec -ti app bundle exec rails console

To run the test suite:

docker-compose exec -ti app bundle exec rake test   # rails 4
docker-compose exec -ti app bundle exec rails test  # rails 5

To inspect logs:

docker-compose logs -f

To restart just one container

docker-compose restart app

To stop (but not destroy) the cluster

docker-compose stop

To start (a stopped) cluster

docker-compose start

To destroy the cluster (usefull if config or state gets messed up)

docker-compose down

Check docker-compose config

docker-compose config

Debug in Docker(with pry) (As mentioned in below answers Ctrl+p, Ctrl+q will now turn interactive mode into daemon mode.)

docker attach app_name

docker-compose.yml

---
version: '3.8'
services:
  db:
    image: mysql:8.0.19
    container_name: mysql
    restart: always
    command: --default-authentication-plugin=mysql_native_password
    environment:
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
    volumes:
      - db_data:/var/lib/mysql
    ports:
      - "3307:3306"
    cap_add:
      - SYS_NICE
  app:
    build: .
    working_dir: /app
    container_name: container_name
    stdin_open: true
    tty: true
    volumes:
      - .:/app
      - ~/.ssh:/root/.ssh
    environment:
      TZ: Asia/Taipei
    command: /bin/sh -c "/usr/bin/start.sh"
    ports:
      - "3080:3080"
    depends_on:
      - db

volumes:
  db_data:
    external: false
    driver: local

networks:
  default:
    external:
      name: network-name

Dockerfile

FROM ruby:2.7.0-slim

MAINTAINER Greg

RUN apt-get update && apt-get upgrade -y && \
    apt-get install -y --no-install-recommends tzdata default-libmysqlclient-dev \
    build-essential sudo git curl ssh openssh-client && \
    sudo apt-get install -y nodejs yarn && \
    apt-get clean autoclean && \
    apt-get purge -y --auto-remove && \
    rm -rf \
    /var/lib/apt \
    /var/lib/dpkg \
    /var/lib/cache \
    /var/lib/log

ENV APP_FOLDER /app

RUN mkdir ${APP_FOLDER}

ENV BUNDLER_VERSION 2.1.4

RUN gem install bundler --version "$BUNDLER_VERSION"

WORKDIR ${APP_FOLDER}
# Copy the main application.
COPY . ${APP_FOLDER}

COPY start.sh /usr/bin/
RUN chmod +x /usr/bin/start.sh

EXPOSE 3080

env

PORT=3080
RAILS_ENV=development

# Rails Application
DB_NAME=XXXX_development
DB_USER=root
DB_PASSWORD=123456
DB_HOST=db

# MySQL
MYSQL_ROOT_PASSWORD=123456

start

#!/usr/bin/env bash
# bin/start

echo "Removing old server pid's if any..."
rm -f tmp/pids/server.pid

echo "Checking bundle dependencies..."
bundle install

echo "Booting up..."
bundle exec puma -C config/puma.rb -e development

# Then exec the container's main process (what's set as CMD in the Dockerfile).
exec "$@"