Docker Compose MariaDB ends with code 0 when using command - docker

Question

I have a dockercompose with MariaDB+PHPMyadmin. I'm running some commands inside db service but after them it ends with code 0 while i'm expecting a mariadb server running.
I checked my docker-compose.yml without commands and it worked fine.
This is my compose:
version: '3.1'
services:
db:
image: mariadb:10.3
command: |
sh -c " echo 'Starting Commands'&& apt-get update && apt-get install -y wget && wget https://downloads.mysql.com/docs/sakila-db.tar.gz && tar xzf sakila-db.tar.gz & & echo 'Extraction Finished' && mv sakila-db/sakila-schema.sql /docker-entrypoint-initdb.d/1.sql && mv sakila-db/sakila-data.sql /docker-entrypoint-initdb.d/2.sql && echo ' Finished Commands'"
environment:
MYSQL_ROOT_PASSWORD: notSecureChangeMe
phpmyadmin:
image: phpmyadmin
restart: always
ports:
- 8080:80
This is the output:
db_1 | Starting Commands
db_1 | Get:1
db_1 | Get:2
db_1 | Get:3
db_1 | Get:BLA BLA BLA
db_1 | Unpacking wget (1.20.3-1ubuntu1) ...
db_1 | Setting up wget (1.20.3-1ubuntu1) ...
db_1 | BLA BLA BLA
db_1 | Connecting to downloads.mysql.com (downloads.mysql.com)|137.254.60.14|:443... connected.
db_1 | HTTP request sent, awaiting response... 200 OK
db_1 | Length: 732133 (715K) [application/x-gzip]
db_1 | Saving to: 'sakila-db.tar.gz'
db_1 | BLA BLA BLA
db_1 | 2021-11-10 23:28:49 (1.25 MB/s) - 'sakila-db.tar.gz' saved [732133/732133]
db_1 |
db_1 | Extraction Finished
db_1 | Finished Commands
root_db_1 exited with code 0
I supose thay "command" function could be overriding something but cannot find what.

Answer 1

If you look at the original Dockerfile for mariadb you will see that they have an ENTRYPOINT and CMD which start the database.
ENTRYPOINT ["docker-entrypoint.sh"]
CMD ["mysqld"]
So try adding this to the list of command you run, like so (notice the last line in the command listing):
db:
image: mariadb:10.3
command: |
sh -c "echo 'Starting Commands' && \
apt-get update && \
apt-get install -y wget && \
wget https://downloads.mysql.com/docs/sakila-db.tar.gz && \
tar xzf sakila-db.tar.gz && \
echo 'Extraction Finished' && \
mv sakila-db/sakila-schema.sql /docker-entrypoint-initdb.d/1.sql && \
mv sakila-db/sakila-data.sql /docker-entrypoint-initdb.d/2.sql && \
echo 'Finished Commands' && \
docker-entrypoint.sh mysqld"
environment:
MYSQL_ROOT_PASSWORD: notSecureChangeMe
exec'ing into the container and checking existing databases:
root#c875454e15cb:/# mysql -u root -pnotSecureChangeMe -e "show databases"
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| sakila | <<<<<<<<<<<<<<<<<<<
+--------------------+

Answer 2

This is the MariaDB definition in my docker-compose.yaml and I don't have a problem with it.
services:
mariadb:
image: mariadb:10.6-focal
restart: always
ports:
- 3306:3306
environment:
MYSQL_ROOT_PASSWORD: <password>
MYSQL_DATABASE: <database>
volumes:
- mariadb-data:/var/lib/mysql