Dev Services

Quarkus supports a feature called Dev Services that allows you to create various containers without any config. What that means in practice is that if you have Docker running and have not configured quarkus.minio.url, Quarkus will automatically start a Minio container when running tests or in dev mode, and automatically configure the connection.

When running the production version of the application, the Minio connection needs to be configured as normal.

If using multiple minio client, all will target the same container. At the moment it’s also not possible to configure devservices individually for each minio client.

Shared server

Most of the time you need to share the server between applications. Dev Services for Minio implements a service discovery mechanism for your multiple Quarkus applications running in dev mode to share a single server.

Dev Services for Minio starts the container with the quarkus-dev-service-minio label which is used to identify the container.

If you need multiple (shared) servers, you can configure the quarkus.minio.devservices.service-name attribute and indicate the server name. It looks for a container with the same value, or starts a new one if none can be found. The default service name is minio.

Containers are started using Testcontainers and support reusable instances. If you add the property testcontainers.reuse.enable=true in your Testcontainers configuration file, then the container will not be stopped after each run, and can be reused. See https://www.testcontainers.org/features/reuse/#how-to-use-it for more information.

Sharing is enabled by default in dev mode, but disabled in test mode. You can disable the sharing with quarkus.minio.devservices.shared=false.

Available properties

When using the Dev service, the following properties will be made available at runtime :

quarkus.minio.url

The container host name. It isn’t an URL, it doesn’t contains the exposed port. It’s value will certainly be localhost

Hard drive

Permanent storage for operating system and/or user files.

quarkus.minio.port

The container exposed port. May be used in combination with quarkus.minio.url to get an URL

quarkus.minio.secure

Will be false

quarkus.minio.secret-key

Will be logged at startup

quarkus.minio.access-key

Will be logged at startup

Additional environment variables

You can enhance the container’s functionality by injecting additional environment variables. These variables might be used, for instance, to configure Bucket Notifications or Identity and Access Management. You can achieve this by including quarkus.minio.devservices.container-env.ENV_VAR_NAME=value in your configuration settings.

quarkus.minio.devservices.container-env.MINIO_NOTIFY_KAFKA_ENABLE_LOCAL=on
quarkus.minio.devservices.container-env.MINIO_NOTIFY_KAFKA_TOPIC_LOCAL=example.topic

quarkus.minio.devservices.container-env.MINIO_IDENTITY_OPENID_CLAIM_NAME=policy