実行環境

Windows 10
DockerDesktop for Windows

ディレクトリ構成

.
├── docker-compose.yml
└── mysql
    ├── conf.d
    ├── initdb.d
    │   ├── schema.sql
    │   └── testdata.sql
    └── log

docker-compose.yml

version: '3.3'
services:
  db:
    image: mysql:latest
    restart: always
    volumes:
      - .\mysql\initdb.d:/docker-entrypoint-initdb.d
      - .\mysql\conf.d:/etc/mysql/conf.d
      - .\mysql\log\ysql:/var/log/mysql
    environment:
      MYSQL_DATABASE: sample_db
      MYSQL_USER: user
      MYSQL_PASSWORD: password
      MYSQL_ROOT_PASSWORD: rootpassword
    ports:
      - 3306:3306

テーブル定義&初期データ

mysql/init.dにテーブル定義と投入する初期データのファイルを作成する

schema.sql

CREATE TABLE Comment
(
        id int NOT NULL AUTO_INCREMENT,
        title varchar(32) NOT NULL,
        category varchar(32) NOT NULL,
        content varchar(256) NOT NULL,
        PRIMARY KEY(id)
);

testdata.sql

INSERT INTO Comment (title, category, content) VALUES ('curry', 'food', 'good');
INSERT INTO Comment (title, category, content) VALUES ('poteto', 'vegitable', 'good');
INSERT INTO Comment (title, category, content) VALUES ('onion', 'vegitable', 'bad');
INSERT INTO Comment (title, category, content) VALUES ('poak', 'meat', 'very good');

コンテナ起動&確認

docker-compose upでコンテナ起動

$ docker-compose up -d

docker execで起動したコンテナに入り、mysqlに接続。
テストデータが入っていることまで確認。

$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                               NAMES
f225c6620b90        mysql:latest        "docker-entrypoint.s…"   11 minutes ago      Up 11 minutes       0.0.0.0:3306->3306/tcp, 33060/tcp   webapp_db_1
$ docker exec -it f225c6620b90 bash
# mysql --user=user --password=password
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| sample_db          |
+--------------------+
mysql> show tables;
+---------------------+
| Tables_in_sample_db |
+---------------------+
| Comment             |
+---------------------+
1 row in set (0.00 sec)

mysql> select * from Comment;
+----+--------+-----------+-----------+
| id | title  | category  | content   |
+----+--------+-----------+-----------+
|  1 | curry  | food      | good      |
|  2 | poteto | vegitable | good      |
|  3 | onion  | vegitable | bad       |
|  4 | poak   | meat      | very good |
+----+--------+-----------+-----------+
4 rows in set (0.01 sec)