connect to dockerized sql from host: Access denied - mysql

Question

I'm sorry to open one more of those 'can't connect to my database' questions, but after searching for hours I just don't get it.
I want a dockerized database to be used by the (non dockerized) invoicePlane app.
So I'm using the following docker-compose.yml
version: '2'
services:
db:
image: mariadb:latest
#also tried mysql:latest
restart: always
environment:
MYSQL_DATABASE: 'invoiceplane_db'
MYSQL_USER: 'invoiceplane'
MYSQL_PASSWORD: 'pass1'
MYSQL_ROOT_PASSWORD: 'pass0'
expose:
- '3306'
volumes:
myserver/path:/var/lib/mysql
volumes:
invoiceplane-db:
It starts with sudo docker-compose -f docker-compose.yml up
From inside the container, everything works fine. I can connect, e.g. via mysql -uroot -ppass0, and see
+--------------+-----------+
| User | Host |
+--------------+-----------+
| invoiceplane | % |
| root | % |
| root | localhost |
+--------------+-----------+
3 rows in set (0.004 sec)
Now I want to access the db from the host, trying
mysql invoiceplane_db_1:3306 -uroot -ppass0
where invoiceplane_db_1 is the container's name.
but I'm always getting:
ERROR 1045 (28000): Access denied for user 'root'#'localhost' (using password: YES)
Through my websearch I gained the impression that this may have to do with the bind-address in the /etc/mysql/my.cnf of the container, which was stated here, for example. But I was not able to get it right. Initially, the parameter was commented out. I set it to bind-address = 127.0.0.1 and restarted the container. It did not help.
Am I missing something here?

Answer 1

This is my working docker-composer for mariadb:
db:
image: mariadb:10.4
ports:
- "3306:3306"
volumes:
- db-storage:/var/lib/mysql
environment:
MYSQL_ROOT_PASSWORD: root-pass
MYSQL_USER: my-user
MYSQL_PASSWORD: my-user-pass
MYSQL_DATABASE: my-database
From the looks of it, seems like you are missing the port mapping: 3306:3306