Docker. Create image based on MySQL with DB and User created - mysql

Question

I want to create an image with docker for my app.
The app uses MySQL. I need my image to be based on MySQL image (mysql/mysql-server ?) .
IN the Dockerfile i need to set some instructions to create a DB with specific user/password . So, my app can work with that DB .
I don't need tables, only empty DB with specific name and user/password that can access this DB.
How can i do this?
I wanted something like
FROM mysql/mysql-server
# Create MySQL DB
mysql -u root -e "CREATE DATABASE MyDB"
But i don't know root user password here. It seems it is autogenerated ?
How can i do this?

Answer 1

That image auto-generates the root password by default, as stated in the image github repository (https://github.com/mysql/mysql-docker). You can set the MYSQL_ROOT_PASSWORD environment variable in your Dockerfile with the password you want.
Apart from that, if what you want is to create a database at image startup, you can use the environment variable MYSQL_DATABASE.
More info about the supported environment variables here:
https://github.com/mysql/mysql-docker#docker-environment-variables

Answer 2

You have 2 solutions here:
[Easy] Using the docker-compose and create a docker-compose.yml file like this one:
version: '3'
services:
mariadb:
container_name: mariadb
image: mariadb:latest
environment:
- MYSQL_DATABASE=_YOUR_DB_
- MYSQL_ROOT_PASSWORD="_YOUR_PASSWORD_"
- MYSQL_USER=_YOUR_USER_
- MYSQL_PASSWORD=_YOUR_USER_PASSWORD_
...
This configuration will bring a MariaDB database to you. also if you want to use it, you can simply check this page for the installation guide:
https://github.com/docker/compose
The final step is just to go into the directory you saved the docker-compose.yml and just run:
docker-compose up
or if you don't want to see the log inside the terminal just add -d flag to it.
2. [Little Complicated] You can create a custom image for your needs. in this case, it is better if you check the Dockerfile documents and then see this autogenerated default MariaDB Dockerfile for understanding what to do exactly to achieve your goal.