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【Rails】docker-composeの速度を上げる方法

Posted at

開発環境

・Docker: 19.03.8
・Docker-Compose: 1.25.5
・Ruby: 2.5.7
・Rails: 5.2.4
・Vagrant: 2.2.7
・VirtualBox: 6.1
・OS: macOS Catalina

前提

下記実装済み。

Dockerで環境構築する方法

原因

docker-compose実行時に、templogvendor.git等の余計なファイルをマウントしてしまっている。

解決方法

マウントする必要のないディレクトリのマウントを、別のvolumeで上書きします。

docker-compose.ymlを編集

docker-compose.yml
# 変更前
version: '3'
services:
  db:
    image: postgres
    volumes:
      - ./tmp/db:/var/lib/postgresql/data
    environment:
      POSTGRES_PASSWORD: password
  web:
    build: .
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
    volumes:
      - .:/myapp
    ports:
      - "3000:3000"
    depends_on:
      - db

# 変更後
version: '3'
services:
  db:
    image: postgres
    volumes:
      - ./tmp/db:/var/lib/postgresql/data
    environment:
      - POSTGRES_HOST_AUTH_METHOD=trust
  web:
    build: .
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
    volumes:
      - .:/app:cached
      - /app/vendor
      - /app/tmp
      - /app/log
      - /app/.git
    ports:
      - '3000:3000'
    depends_on:
      - db
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