Dossier is a JupyterHub extension that provides multi-tenant distributed Jupyter Notebooks as a Service on Kubernetes. In particular, it provides a Kubernetes-centric management of multi-user, distributed eScience platforms that leverage Jupyter Notebooks as their primary user interface.
The Capsule platform implements a multi-tenant, policy-based environment on a Kubernetes cluster. It logically groups namespaces in Tenants to easily manage authorization, accounting, and resource segmentation. Dossier extends the JupyterHub KubeSpawner library, which can spawn per-user Jupyter Notebooks on a Kubernetes cluster, to support Tenants and spawn user-requested Jupyter Notebooks accordingly.
In this setting, a Kubernetes Tenant becomes the central point where system administrators can configure all aspects of Jupyter Notebooks spawning through Kubernetes annotations, e.g., resource requests and limits, access to GPUs and persistent volumes, Jupyter-based container images, and even custom Spawner classes to access remote resources (like private clouds or queue-based HPC facilities).