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Control plane

The control plane is the central, highly available component of Tritolem. It keeps the desired state for customers, projects, service offerings, and service instances as Kubernetes custom resources.

The REST API and the CLI are both management interfaces on top of that same desired state — neither is a separate source of truth. Direct access to specific platform custom resources is a provisional path for selected provider use cases, not a general customer-facing interface.

The control plane coordinates, across all connected clusters:

  • Policy — which customers and projects may order which service offerings, and within which quotas.
  • Placement — which workload cluster a given service instance runs on, based on resource availability, policy, and provider overrides.
  • Lifecycle — provisioning, provider-approved updates, and full deprovisioning of service instances.

High availability is scoped to a single control-plane cluster. The exact custom resource layout is not yet decided.