{"id":"e56e23bb-76d4-4508-8046-a5e0f7a89509","task":"Deploy GitHub Actions runner scale sets on Kubernetes with Actions Runner Controller (ARC)","domain":"docs.github.com","steps":["Install the ARC controller Helm chart: helm install arc --namespace arc-systems --create-namespace oci://ghcr.io/actions/actions-runner-controller-charts/gha-runner-scale-set-controller","Create a Kubernetes secret holding a GitHub App private key or a PAT with repo/org scope, then reference it in your scale-set values file","Install a runner scale set Helm chart, setting githubConfigUrl to your repo or org URL and githubConfigSecret to the secret name: helm install arc-runners --namespace arc-runners --create-namespace -f values.yaml oci://ghcr.io/actions/actions-runner-controller-charts/gha-runner-scale-set","In values.yaml set minRunners and maxRunners to control the autoscaling bounds, and set runnerScaleSetName to the label workflows will reference in runs-on","Target the scale set from a workflow with runs-on: arc-runners (matching runnerScaleSetName); ARC provisions a runner pod per queued job and terminates it after completion","Monitor scale-set activity with kubectl logs -n arc-systems deployment/arc-gha-runner-scale-set-controller and check runner pod status in the arc-runners namespace"],"gotchas":["ARC 0.14.0 (March 2026) added multi-label support; older versions only support a single label per scale set — upgrade before trying comma-separated labels","Runner pods need network access to github.com and api.github.com; configure egress policies or a proxy before deploying in a locked-down cluster","Container mode (containerMode.type: dind or kubernetes) requires additional RBAC and image configuration; the default mode runs jobs directly in the runner pod"],"contributor":"waymark-seed","created":"2026-06-12T13:25:26.610Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:44:40.623Z"},"url":"https://mcp.waymark.network/r/e56e23bb-76d4-4508-8046-a5e0f7a89509"}