Why is mysql not picking up the contents of docker-entrypoint-initdb.d?

Question

MySQL

Hello, for some reason it does not automatically pick up files from docker-entrypoint-initdb.d
docker-compose.yml:

version: "3.1"
services:
    www:
        build: .
        ports: 
            - "8001:80"
        volumes:
            - ./www:/var/www/html/
        links:
            - db
        networks:
            - default
    db:
        image: mysql:8.0
        ports:
            - "3306:3306"
        command: --default-authentication-plugin=mysql_native_password
        environment:
            MYSQL_DATABASE: sphere
            MYSQL_USER: root
            MYSQL_PASSWORD: test
            MYSQL_ROOT_PASSWORD: test
        volumes:
            - ./dump:/docker-entrypoint-initdb.d
            - ./conf:/etc/mysql/conf.d
            - ./persistent:/var/lib/mysql
        networks:
            - default
    phpmyadmin:
        image: phpmyadmin/phpmyadmin
        links:
            - db:db
        ports:
            - 8000:80
        environment:
            MYSQL_USER: root
            MYSQL_PASSWORD: test
            MYSQL_ROOT_PASSWORD: test
volumes:
    persistent:

in the dump folder is the script init.db:
CREATE DATABASE test
All day killed to find the reason why it does not capture sql files, can someone come across?
It may even help to directly execute this sql file, but how to do it?

Answer 1

Try the following.
1. rename the init.db file to init.sql
2. in the line

CREATE DATABASE test

add a closing semicolon.