Ruby on Docker

以下為本地開發的 Docker 環境，使用rails+sidekiq+redis+mysql+webpacker

database.yml

default: &default
  adapter: mysql2
  host: <%= ENV['MYSQL_HOST'] %>
  encoding: utf8mb4
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: <%= ENV.fetch('DB_USER') {'root'} %>
  password: <%= ENV.fetch('MYSQL_ROOT_PASSWORD') {'password'} %>
  port: <%= ENV.fetch('DB_PORT') { 3306 } %>

development:
  <<: *default
  database: <%= ENV.fetch('DB_DATABASE') {'liteshop'} %>_dev

test:
  <<: *default
  database: <%= ENV.fetch('DB_DATABASE') {'liteshop'} %>_test

production:
  <<: *default
  database: <%= ENV['DB_DATABASE'] %>_prd

Dockerfile

ARG RUBY_VERSION
FROM ruby:$RUBY_VERSION
LABEL MAINTAINER=k445566778899k@gmail.com
ARG NODE_MAJOR
ARG BUNDLE_VERSION
RUN apt-get update
RUN apt-get install build-essential -y
# RUN apt-get install -y \
#             libmcrypt-dev \
#             libmysqlclient-dev \
RUN apt-get install -y libmcrypt-dev
RUN apt-get install -y libmariadb-dev-compat libmariadb-dev
RUN gcc --version
RUN make --version
RUN curl -SL https://deb.nodesource.com/setup_$NODE_MAJOR.x | bash -
RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
RUN apt-get update
RUN apt-get install nodejs -y
RUN apt-get install yarn -y
COPY Gemfile Gemfile.lock ./
RUN gem install bundler -v $BUNDLE_VERSION
RUN bundle install -j $(nproc)
RUN mkdir -p /app
WORKDIR /app

docker-compose.yml

version: '3.8'
services:
  base: &base
    build:
      args:
        RUBY_VERSION: '2.6.3'
        NODE_MAJOR: '13'
        BUNDLE_VERSION: '2.1.2'
      context: .
      dockerfile: ./Dockerfile
backend: &backend
    <<: *base
    volumes:
      - .:/app:cached
      - rails_cache:/app/tmp/cache
      - bundle:/usr/local/bundle
      - node_modules:/app/node_modules
      - packs:/app/public/packs
    depends_on:
      - db
      - redis
app:
    <<: *backend
    command: bundle exec rails server -b 0.0.0.0
    ports:
      - '3000:3000'
    environment:
      MYSQL_HOST: localhost
      MYSQL_ROOT_PASSWORD: password
      DATABASE_URL: 'mysql2://db'
      DB_USER: root
      DB_DATABASE: liteshop
      RAILS_ENV: development
      RAILS_MAX_THREADS: 5
        - WEBPACKER_DEV_SERVER_HOST=webpacker
        - BUNDLE_PATH=/bundle/vendor
redis:
    image: redis
    ports:
      - 6379:6379
    volumes:
      - ./redis:/data
    command: redis-server --appendonly yes
webpacker:
    <<: *backend
    command: ./bin/webpack-dev-server
    ports:
      - '3035:3035'
    environment:
      - WEBPACKER_DEV_SERVER_HOST=0.0.0.0
db:
    image: mysql:5.7
    restart: always
    ports:
      - '3307:3306'
    volumes:
      - 'mysql:/var/lib/mysql'
sidekiq:
    <<: *backend
    command: bundle exec sidekiq
    environment:
      - DATABASE_URL=mysql2://db
      - REDIS_URL=redis://redis:6379/1
#  docker-compose down時，想辦法讓資料不要自動清除，沒錯，關鍵字就是volumes
volumes:
  rails_cache:
  bundle:
  node_modules:
  packs:
  mysql:
  redis:

常用指令

docker-compose build
docker-compose up -d db

docker-compose run --rm app bundle install
docker-compose run --rm app bundle exec rake webpacker:install
docker-compose up app

docker-compose run --rm app bin/rails db:create
docker-compose run --rm app bin/rails db:migrate
# 刪除正在運行的 port
# rm tmp/pids/server.pid

config/initializers/sidekiq.rb

# 如果不啟用 sidekiq 可以打開
if Rails.env.development?
  # require 'sidekiq/testing'
  # Sidekiq::Testing.inline!
end


Sidekiq.configure_client do |config|
  config.client_middleware do |chain|
    config.redis = { url: ENV.fetch('REDIS_URL', 'redis://localhost:6379/1') }

    # accepts :expiration (optional)
    chain.add Sidekiq::Status::ClientMiddleware, expiration: 30.minutes # default
  end
end

Sidekiq.configure_server do |config|
  config.redis = { url: ENV.fetch('REDIS_URL', 'redis://localhost:6379/1') }

  config.server_middleware do |chain|
    # accepts :expiration (optional)
    chain.add Sidekiq::Status::ServerMiddleware, expiration: 30.minutes # default
  end
  config.client_middleware do |chain|
    # accepts :expiration (optional)
    chain.add Sidekiq::Status::ClientMiddleware, expiration: 30.minutes # default
  end
end

Reference

Webpack 環境設定

Dockerising Webpacker - Plymouth Software

Mysql 環境設定

Rails app using docker-compose wont connect to the mysql container

Sidekiq 環境設定

Sidekiq Error connecting to Redis on 127.0.0.1:6379 (Errno::ECONNREFUSED) on docker-compose