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【docker-composeデータ永続化】Django + MySQLのDocker環境のデータ永続化

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はじめに

以前構築したDjango + MySQLのDocker環境について、コンテナの停止・削除(docker-compose down)を行なってもDBに保存したデータが消えないよう、データ永続化のための設定をdocker-composeに追記しました。

以前書いた環境構築の記事も更新済みです。

前提環境

PC: MacBook Air M2
OS: macOS Ventura Ver. 13.2.1
Homebrew: 4.0.9
Docker: 20.10.23
docker-compose: v2.15.1

設定内容

設定変更後のdocker-compose.ymlの内容は次の通りです。

docker-compose.yml
version: '3.9'
services:
  db:
    container_name: mysql
    image: mysql
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: ${MYSQL_ROOT_PASSWORD}
      MYSQL_DATABASE: ${MYSQL_DATABASE}
      MYSQL_USER: ${MYSQL_USER}
      MYSQL_PASSWORD: ${MYSQL_PASSWORD}
      TZ: 'Asia/Tokyo'
    command: mysqld --character-set-server=utf8 --collation-server=utf8_unicode_ci
    volumes:  #追記
      - db_data:/var/lib/mysql
  
  django:
    container_name: django
    build: .
    command: python manage.py runserver 0.0.0.0:8000
    volumes:  #追記
      - .:/code
    ports:
      - "8000:8000"
    depends_on:
      - db

volumes:  #追記
  db_data:

参考サイト

Docker 上で MySQL データを永続化する

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