Rails のセットアップ

ローカルの準備

Homebrew

brew install mysql@8.4
brew install mysql-client@8.4

bundle install

# mysql2: zstd not found
bundle config --local build.mysql2 --with-ldflags=-L$(brew --prefix zstd)/lib
bundle install

データベース

bin/rails db:create
bin/rails db:migrate

---

docker-compose.yml

services:
  db:
    image: mysql:8.4
    container_name: sample-mysql
    restart: always
    environment:
      TZ: Asia/Tokyo
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
    volumes:
      - ./mysql-volumes:/var/lib/mysql
    ports:
      - "3306:3306"
 
  web:
    container_name: sample-web
    build:
      context: .
      dockerfile: Dockerfile.dev
    restart: always
    environment:
      TZ: Asia/Tokyo
      DB_HOST: db
      DATABASE_PASSWORD: ${DATABASE_PASSWORD}
    command: sh -c "rm -f /rails/tmp/pids/server.pid && /rails/bin/rails s -p 3000 -b '0.0.0.0'"
    volumes:
      - .:/rails
    ports:
      - "3000:3000"
    depends_on:
      - db
 
volumes:
  mysql-volumes:

dockerignore, .gitignore

# 追加
.env
/mysql-volumes/*
/vendor/bundle/*

.env

MYSQL_ROOT_PASSWORD=***********
DATABASE_PASSWORD=***********

config/database.yml

password: <%= ENV["DATABASE_PASSWORD"] %>

Dockerfile.dev

# syntax=docker/dockerfile:1
# check=error=true
 
# This Dockerfile is designed for production, not development. Use with Kamal or build'n'run by hand:
# docker build -t sample .
# docker run -d -p 80:80 -e RAILS_MASTER_KEY=<value from config/master.key> --name sample sample
 
# For a containerized dev environment, see Dev Containers: https://guides.rubyonrails.org/getting_started_with_devcontainer.html
 
# Make sure RUBY_VERSION matches the Ruby version in .ruby-version
ARG RUBY_VERSION=3.4.2
FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base
 
# Rails app lives here
WORKDIR /rails
 
# Install base packages
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y curl default-mysql-client libjemalloc2 libvips && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives
 
# Set production environment
ENV RAILS_ENV="development" \
    BUNDLE_PATH="/usr/local/bundle"
 
# Throw-away build stage to reduce size of final image
FROM base AS build
 
# Install packages needed to build gems
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y build-essential default-libmysqlclient-dev git pkg-config libyaml-dev && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives
 
# Install application gems
COPY Gemfile Gemfile.lock ./
RUN gem install bundler -v '2.6.5' && \
    bundle install && \
    rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
    bundle exec bootsnap precompile --gemfile
 
# Copy application code
COPY . .
 
# Precompile bootsnap code for faster boot times
RUN bundle exec bootsnap precompile app/ lib/
 
# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
 
 
 
 
# Final stage for app image
FROM base
 
# Copy built artifacts: gems, application
COPY --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}"
COPY --from=build /rails /rails
 
# Run and own only the runtime files as a non-root user for security
RUN groupadd --system --gid 1000 rails && \
    useradd rails --uid 1000 --gid 1000 --create-home --shell /bin/bash && \
    chown -R rails:rails db log storage tmp
USER 1000:1000
 
# Entrypoint prepares the database.
ENTRYPOINT ["/rails/bin/docker-entrypoint"]
 
# Start server via Thruster by default, this can be overwritten at runtime
EXPOSE 80
CMD ["./bin/thrust", "./bin/rails", "server"]