I used docker-entrypoint-initdb.d approach (Thanks to @Kuhess)
But in my case I want to create my DB based on some parameters I defined in .env file so I did these
1) First I define .env file something like this in my docker root project directory
MYSQL_DATABASE=my_db_name
MYSQL_USER=user_test
MYSQL_PASSWORD=test
MYSQL_ROOT_PASSWORD=test
MYSQL_PORT=3306
2) Then I define my docker-compose.yml file. So I used the args directive to define my environment variables and I set them from .env file
version: '2'
services:
### MySQL Container
mysql:
build:
context: ./mysql
args:
- MYSQL_DATABASE=${MYSQL_DATABASE}
- MYSQL_USER=${MYSQL_USER}
- MYSQL_PASSWORD=${MYSQL_PASSWORD}
- MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
ports:
- "${MYSQL_PORT}:3306"
3) Then I define a mysql folder that includes a Dockerfile. So the Dockerfile is this
FROM mysql:5.7
RUN chown -R mysql:root /var/lib/mysql/
ARG MYSQL_DATABASE
ARG MYSQL_USER
ARG MYSQL_PASSWORD
ARG MYSQL_ROOT_PASSWORD
ENV MYSQL_DATABASE=$MYSQL_DATABASE
ENV MYSQL_USER=$MYSQL_USER
ENV MYSQL_PASSWORD=$MYSQL_PASSWORD
ENV MYSQL_ROOT_PASSWORD=$MYSQL_ROOT_PASSWORD
ADD data.sql /etc/mysql/data.sql
RUN sed -i 's/MYSQL_DATABASE/'$MYSQL_DATABASE'/g' /etc/mysql/data.sql
RUN cp /etc/mysql/data.sql /docker-entrypoint-initdb.d
EXPOSE 3306
4) Now I use mysqldump to dump my db and put the data.sql inside mysql folder
mysqldump -h <server name> -u<user> -p <db name> > data.sql
The file is just a normal sql dump file but I add 2 lines at the beginning so the file would look like this
--
-- Create a database using `MYSQL_DATABASE` placeholder
--
CREATE DATABASE IF NOT EXISTS `MYSQL_DATABASE`;
USE `MYSQL_DATABASE`;
-- Rest of queries
DROP TABLE IF EXISTS `x`;
CREATE TABLE `x` (..)
LOCK TABLES `x` WRITE;
INSERT INTO `x` VALUES ...;
...
...
...
So what happening is that I used "RUN sed -i 's/MYSQL_DATABASE/'$MYSQL_DATABASE'/g' /etc/mysql/data.sql" command to replace the MYSQL_DATABASE placeholder with the name of my DB that I have set it in .env file.
|- docker-compose.yml
|- .env
|- mysql
|- Dockerfile
|- data.sql
Now you are ready to build and run your container
