# JAAS > JAAS is an enterprise layer on top of Juju that provides centralized controller management, OIDC authentication, and ReBAC authorization. 2026 CC-BY-SA, Canonical Group Ltd ## Pages in this subsection - [How-to guides](https://documentation.ubuntu.com/jaas/latest/howto.md): How-to guides for JAAS operations including deployment management, controllers, clouds, models, users, groups, roles, and permissions. - [Manage your JAAS deployment](https://documentation.ubuntu.com/jaas/latest/howto/manage-your-jaas-deployment.md): Complete guide to deploying and managing JAAS with JIMM controller, OpenFGA, PostgreSQL, Vault on Kubernetes with authentication configuration. - [Manage Juju controllers](https://documentation.ubuntu.com/jaas/latest/howto/manage-juju-controllers.md): Learn how to add, remove, and manage Juju controllers in JAAS for centralized model management across multiple controllers. - [Manage clouds](https://documentation.ubuntu.com/jaas/latest/howto/manage-clouds.md): Learn how to manage clouds in JAAS, including controlling user access with permissions. - [Manage users](https://documentation.ubuntu.com/jaas/latest/howto/manage-users.md): Learn how to set up new users in JAAS, configure DNS addresses, manage login credentials, and control user access to resources. - [Manage roles](https://documentation.ubuntu.com/jaas/latest/howto/manage-roles.md): Learn how to create, rename, and manage roles in JAAS to grant users collections of permissions across resources and environments. - [Manage groups](https://documentation.ubuntu.com/jaas/latest/howto/manage-groups.md): Learn how to create, rename, and manage groups in JAAS to organize users and control access to models, clouds, and controllers. Includes migration to IdP groups. - [Manage permissions](https://documentation.ubuntu.com/jaas/latest/howto/manage-permissions.md): Learn how to add, revoke, and check permissions in JAAS for users, groups, roles, and resources including controllers, clouds, and models. - [Manage models](https://documentation.ubuntu.com/jaas/latest/howto/manage-models.md): Learn how to create, deploy, and manage Juju models in JAAS with controller placement, access control, and model lifecycle operations. - [Manage offers](https://documentation.ubuntu.com/jaas/latest/howto/manage-offers.md): Learn how to manage application offers in JAAS and control user access with permissions. ## Optional - [Top-level llms.txt](https://documentation.ubuntu.com/jaas/latest/llms.txt): Complete documentation index.