K8s ARC Controller

Installs GitHub's Actions Runner Controller into the Rabbit cluster.

Use this module once per cluster; it is the control plane for every per-tenant runner scale set deployed by k8s-arc-runner.

Supported Features

• Official gha-runner-scale-set-controller Helm chart from GitHub's OCI registry.
• Dedicated arc-systems namespace, isolated from runner namespaces.
• Configurable chart version and log level.
• Atomic and wait-for-ready deployment.

Prerequisites

• GKE cluster reachable with the deploying identity's ambient Google credentials.

Important Notes

• Deploy this before any k8s-arc-runner service entry (deployment_order 57 vs 58 enforces this within a run).
• Upgrading the controller chart version requires upgrading every runner scale set to the same version line.