busbar Helm charts

The official Helm chart repository for busbar, a Rust LLM gateway.

Usage

helm repo add busbar https://getbusbar.github.io/helm-charts
helm repo update
helm install my-busbar busbar/busbar

See the chart README for the full values reference and examples.

The two-listener model

busbar always runs two separate listeners:

• Data plane (0.0.0.0:8080) — public LLM proxy traffic. Fronted by a ClusterIP Service and, optionally, an Ingress.
• Admin plane (admin_listen, default loopback 127.0.0.1:8081) — the runtime admin API.

busbar enforces a boot-guard: a non-loopback admin_listen refuses to boot unless the admin listener requires mTLS (admin_tls with a client_ca_file) or an explicit admin_insecure: true waiver is set.

The chart is secure by default: the admin plane stays on loopback and is not exposed, so helm install my-busbar busbar/busbar always boots. To expose the admin plane (service.admin.enabled=true) you must also enable adminTLS.enabled=true (mTLS, ideally via cert-manager) or adminInsecure=true, or the chart fails the render with a clear message.

Governance

With governance.enabled=true, busbar owns a single-writer SQLite DB, so the chart deploys a StatefulSet with a PVC and replicas: 1. Horizontal scale of a shared SQLite governance store is not supported. Stateless (no-governance) deployments use a Deployment and support the HPA.

Contributing

Charts live under charts/. Pull requests are linted and smoke-tested with chart-testing against a kind cluster. On merge to main, chart-releaser packages the chart and publishes it to the gh-pages branch / GitHub Pages.

License

Apache-2.0 © Busbar, Inc.