Berth

Berth is a distributed lease coordination service for Kubernetes multi-cluster workloads.

It provides TTL-based leases for cross-cluster mutual exclusion without introducing an external database or separate consensus layer. Leases are expressed as Kubernetes resources and managed through an API server, an operator, and a CLI.

Berth has an initial release and remains under active development.

Core components

• API server for lease operations.
• Operator that reconciles BerthLease resources.
• CLI for inspection, release, and diagnostics.

Typical use cases

• CronJob singleton execution across a fleet.
• Exclusive access to shared external systems.
• Leader election for cross-cluster controllers.
• Multi-cluster workload coordination with explicit lease state.