How can I find MariaDB URL to be used with Keycloak? - mariadb

Question

I was using Keycloak 16. Now that I want to upgrade to Keycloak 20, I see that they have changed a lot.
This is my docker-compose.yml file from 16:
version: "3.9"
services:
accounts:
image: jboss/keycloak:latest
container_name: Accounts
ports:
- 8080:8080
environment:
- KEYCLOAK_FRONTEND_URL=https://accounts.example.local/auth
- PROXY_ADDRESS_FORWARDING=true
- KEYCLOAK_USER=user
- KEYCLOAK_PASSWORD=pass
- DB_VENDOR=mariadb
- DB_ADDR=database
- DB_DATABASE=accounts
- DB_USER=db_user
- DB_PASSWORD=db_pass
logging:
driver: none
restart: always
database:
image: mariadb
container_name: AccountsDatabase
ports:
- 3306:3306
environment:
- MARIADB_ROOT_PASSWORD=root_pass
- MYSQL_DATABASE=accounts
- MYSQL_USER=db_user
- MYSQL_PASSWORD=db_pass
volumes:
- /Temp/AccountsDatabases:/var/lib/mysql
logging:
driver: none
restart: always
admin:
image: adminer
container_name: AccountsAdminer
restart: always
logging:
driver: none
ports:
- 8080:8080
environment:
- ADMINER_DEFAULT_SERVER=database
Now it seems that Keycloak needs a database URL.
I can't find out how can I connect MariaDB to Keycloak. I can't find out the URL of my MariaDB URL and the Keycloak blog says that they won't provide examples for any database other than their first class PostreSQL.
I'm stuck at this point. Any help is appreciated.

Answer 1

Their documents show KC_DB_URL is a JDBC URL.
So the simple form of jdbc:mariadb://host/database seems used in their tests, so for you:
environment:
- KEYCLOAK_FRONTEND_URL=https://accounts.example.local/auth
- PROXY_ADDRESS_FORWARDING=true
- KEYCLOAK_USER=user
- KEYCLOAK_PASSWORD=pass
- KB_DB_URL=jdbc:mariadb://database/accounts
- KB_DB_USER=db_user
- KB_DB_PASSWORD=db_pass
note: I'm hoping/assuming the JDBC driver for MariaDB is in their container which it may not be.