Unable to upload data to mariadb container from docker volume - docker

Question

I am using mariadb as mysql docker container and am having trouble uploading the data from the docker volume.
My database dockerfile is similar to the one posted at this link. https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux_atomic_host/7/html/getting_started_with_containers/install_and_deploy_a_mariadb_container
Instead of importing the data as shown in the example in the above link, I would like to import it from a docker volume.
I did try using the docker-entrypoint.sh example where I loop through the files in docker-entrypoint-initdb.d but that gets me a myssql.sock error probably because the database is already shutdown from the dockerfile RUN command.
database:
build:
context: ./database
ports:
- "3306:3306"
volumes:
- ./data/data.sql:/docker-entrypoint-initdb.d/data.sql
environment:
- MYSQL_DATABASE=hell
- MYSQL_USER=test
- MYSQL_PASSWORD=secret
- MYSQL_ROOT_PASSWORD=secret

Answer 1

I think your problem is this:
You want to get your schema trough mount volume, but you don't see in the database, right ?
First of all, if your intention is to use mariadb you can use the MariaDB Official Docker Image.
So, with this way you avoid to use redhat images or custom building.
Second, You're copying this SQL, but you don't run a mysql import o dump or something like that. So, what you can do is to put in your docker-compose a command (for example):
database:
build:
context: ./database
ports:
- "3306:3306"
volumes:
- ./data/data.sql:/docker-entrypoint-initdb.d/data.sql
environment:
- MYSQL_DATABASE=hell
- MYSQL_USER=test
- MYSQL_PASSWORD=secret
- MYSQL_ROOT_PASSWORD=secret
command: "mysql -u username -p database_name < file.sql"
But is not the best way.
On the other hand, you can follow MariaDB documentation, set a mount volume, and in the first run, import data. And with the volume you don't have to run again imports.
This is the mount that you have to put:
/my/own/datadir:/var/lib/mysql
Obviously, you can mount your sql file in a /tmp/ folder and thats it, and with docker exec execute sh and run it from inside.