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DockerでDBが起動中かを確認する。

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wait.sh を作成

mysqladmin コマンドを使うために、mysql-client を使っています。

wait.sh
until mysqladmin ping -h db -P 3306 --silent;
do
  echo "Waiting for database connection..."
  sleep 1
done

command: bash -c './wait.sh' で実行する

docker-compose.yml
version: "3"

services:
  db:
    image: mysql:5.7
    env_file: ./src/config/.env
    ports:
      - 3306:3306

  web:
    build: .
    command: bash -c './wait.sh'
    ports:
      - 8080:8080
    depends_on:
      - db

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