How to add Multiple MariaDB/MySQL databases

You can define multiple MySQL databases within one service. To do so, define multiple schemas in your service configuration. Note that this is possible on version 10.0 or later.

You can also specify multiple endpoints for permissions. If neither schemas nor endpoints is included, it’s equivalent to the following default:

    configuration:
        schemas:
            - main
        endpoints:
            mysql:
                default_schema: main
                privileges:
                    main: admin

If either schemas or endpoints are defined, no default is applied and you have to specify the full configuration.

The following configuration example creates a single MariaDB service named db with two databases, main and legacy. Access to the database is defined through three endpoints:

• admin has full access to both databases.
• reporter has SELECT query access to main but no access to legacy.
• importer has SELECT/INSERT/UPDATE/DELETE (but not DDL) access to legacy but no access to main.

db:
    type: mariadb:10.5
    disk: 2048
    configuration:
        schemas:
            - main
            - legacy
        endpoints:
            admin:
                default_schema: main
                privileges:
                    main: admin
                    legacy: admin
            reporter:
                privileges:
                    main: ro
            importer:
                default_schema: legacy
                privileges:
                    legacy: rw

For further details please check the documentation on Multiple databases.