6.10. Observability Flow

Prometheus, Grafana, Langfuse, OpenTelemetry Collector, Tempo, Loki, and service instrumentation boundaries.

1. Diagram

Open the full-size diagram.

2. Notes

Langfuse is deliberately outside the OTel path: LiteLLM emits Langfuse traces via its own success_callback, not through the Collector, because Langfuse is the LLM-behavior layer while Prometheus/Grafana stay the infrastructure-metrics layer. Only backend and LiteLLM OTLP traces currently reach Tempo via the Collector; Loki log export isn't wired up yet.

3. Source Files

• services/prometheus/service.yml
• services/grafana/service.yml
• services/loki/service.yml
• services/tempo/service.yml
• services/otel-collector/service.yml