Day-2 Docker Operations
The compose command shape, the project flag and VERSION prefix, and the everyday operations — logs, restarts, shells, psql.
Configuring Workflow Engine Secrets
The per-engine, slug-keyed environment variables — webhook signing secrets, the stop API key, and timeouts — and why a restart is required.
n8n Deployment & Bring-Your-Own
The bundled n8n and its SQLite store, the env-var allowlist for provider keys, and pointing Circus at an external n8n instead.
Monitoring, the Reconciler & Engine-Stop Failures
The health check, the reconciler that keeps platform and engine state honest, and diagnosing operator-terminate stop failures.
Upgrading & Pinning n8n
Checking the running n8n version, pinning to a specific tag, and upgrading just n8n without touching the rest of the stack.
Storage & Asset Ownership
Circus is storage-agnostic — it orchestrates work but does not own, store, or clean up your assets.