Collections and grants are strong tools that can be used to control access and visibility to resources in UCP.
This tutorial describes a fictitious company named OrcaBank that needs to configure an architecture in UCP with role-based access control (RBAC) for their application engineering group.
OrcaBank reorganized their application teams by product with each team providing shared services as necessary. Developers at OrcaBank do their own DevOps and deploy and manage the lifecycle of their applications.
OrcaBank has four teams with the following resource needs:
security should have view-only access to all applications in the cluster.db should have full access to all database applications and resources. See
DB Team.mobile should have full access to their mobile applications and limited
access to shared db services. See Mobile Team.payments should have full access to their payments applications and limited
access to shared db services.To assign the proper access, OrcaBank is employing a combination of default and custom roles:
View Only (default role) allows users to see all resources (but not edit or use).Ops (custom role) allows users to perform all operations against configs,
containers, images, networks, nodes, secrets, services, and volumes.View & Use Networks + Secrets (custom role) enables users to view/connect to
networks and view/use secrets used by db containers, but prevents them from
seeing or impacting the db applications themselves.
OrcaBank is also creating collections of resources to mirror their team structure.
Currently, all OrcaBank applications share the same physical resources, so all
nodes and applications are being configured in collections that nest under the
built-in collection, /Shared.
Other collections are also being created to enable shared db applications.
Note: For increased security with node-based isolation, use Docker Enterprise Advanced.
/Shared/mobile hosts all Mobile applications and resources./Shared/payments hosts all Payments applications and resources./Shared/db is a top-level collection for all db resources./Shared/db/payments is a collection of db resources for Payments applications./Shared/db/mobile is a collection of db resources for Mobile applications.The collection architecture has the following tree representation:
/
├── System
└── Shared
├── mobile
├── payments
└── db
├── mobile
└── payments
OrcaBank’s Grant composition ensures that their collection
architecture gives the db team access to all db resources and restricts
app teams to shared db resources.
OrcaBank has standardized on LDAP for centralized authentication to help their identity team scale across all the platforms they manage.
To implement LDAP authentication in UCP, OrcaBank is using UCP’s native LDAP/AD integration to map LDAP groups directly to UCP teams. Users can be added to or removed from UCP teams via LDAP which can be managed centrally by OrcaBank’s identity team.
The following grant composition shows how LDAP groups are mapped to UCP teams.
OrcaBank is taking advantage of the flexibility in UCP’s grant model by applying
two grants to each application team. One grant allows each team to fully
manage the apps in their own collection, and the second grant gives them the
(limited) access they need to networks and secrets within the db collection.
OrcaBank’s resulting access architecture shows applications connecting across collection boundaries. By assigning multiple grants per team, the Mobile and Payments applications teams can connect to dedicated Database resources through a secure and controlled interface, leveraging Database networks and secrets.
Note: In Docker Enterprise Standard, all resources are deployed across the same group of UCP worker nodes. Node segmentation is provided in Docker Enterprise Advanced and discussed in the next tutorial.
The db team is responsible for deploying and managing the full lifecycle
of the databases used by the application teams. They can execute the full set of
operations against all database resources.
The mobile team is responsible for deploying their own application stack,
minus the database tier that is managed by the db team.
