MariaDB

Default Credentials

Variable	Value
MARIADB_ROOT_PASSWORD	root

Connection

From inside a project container (using the network alias):

mysql -h mariadb -u root -proot

From the host machine (via the exposed port):

mysql -h 127.0.0.1 -P 3306 -u root -proot

Automatic DATABASE_URL

When a project’s docker-compose.yml contains a mariadb service, dde automatically injects a DATABASE_URL environment variable into the primary service. The database name is derived from the project name (hyphens replaced with underscores).

The variable is only added if:

• It is not already defined in the service’s environment
• It is not defined in the project’s .env or .env.dev files

Data Persistence

Data survives container restarts and dde updates. Each version has its own isolated data directory.

Configuration

Declare in .dde/config.yml:

services:
  - name: mariadb

Or with an explicit version:

services:
  - name: mariadb
    version: "10.6"

See custom-versions.md for details on running non-default versions.