MySQL scripts in docker-entrypoint-initdb are not executed

I had the exact same issue with the mariadb image (version: 10.4) and I solved it by making sure my container data volume is empty from any files or directories when I create the container from scratch.

This is my docker compose file:

  mariadb:
    image: mariadb:10.4
    restart: unless-stopped
    environment:
      MYSQL_ROOT_PASSWORD: ********
    volumes:
    - ./storage/db:/var/lib/mysql:rw
    - ./app/db/SQL:/docker-entrypoint-initdb.d/:rw
    ports:
    - 3306:3306/tcp

For me I just had to make sure this path: './storage/db' is empty from files. Please notice that the directory has to exists but be empty.

So I had the same issue for hours, and then decided to look into docker-entrypoint.sh. It turns out that the script checks for $DATADIR/mysql, typical /var/lib/mysql and skips the rest of the code if the datadir exists, incl. docker-entrypoint-initdb.d

So what I did was make a simple init.sh file to remove the datadir then start docker.

docker-compose.yml:

volumes:
  - ./docker/mysql/scripts:/docker-entrypoint-initdb.d
  - ./mysql_data:/var/lib/mysql

init.sh:

#!/bin/bash
rm -rf mysql_data
docker-compose up --force-recreate

And of course add -d to docker-compose once I see it works as expected.

You should clear data_volume before run the container and the sql files will be executed. This volume data_volume can be removed by using command: docker volume rm data_volume.

The root cause of your problem can be found in docker-entrypoint.sh. When you run a mysql container, it checks mysql directory /var/lib/mysql exist or not. If the directory doesn't exist (run it first time), it will run your SQL files.

    if [ ! -d "$DATADIR/mysql" ]; then
        //Some other logic here

        for f in /docker-entrypoint-initdb.d/*; do
            case "$f" in
                *.sh)     echo "$0: running $f"; . "$f" ;;
                *.sql)    echo "$0: running $f"; "${mysql[@]}" < "$f"; echo ;;
                *.sql.gz) echo "$0: running $f"; gunzip -c "$f" | "${mysql[@]}"; echo ;;
                *)        echo "$0: ignoring $f" ;;
            esac
            echo
        done 

You can get more details at Dockerfile source