Table of Contents

LLM Observability with Self-Hosted Langfuse and vLLM

Introduction to LLM Observability with Langfuse

How Langfuse Fits into an LLM Observability Stack

Langfuse Architecture for LLM Observability

Why Understanding LLM Observability Architecture Matters

Setting Up a Self-Hosted Langfuse and vLLM Stack

Baseline LLM Application (Before Observability)

Adding LLM Observability with the Langfuse @observe Decorator

Running and Verifying a Self-Hosted Langfuse Observability Stack

Summary

In this lesson, you will finally demystify what Large Language Model (LLM) observability actually is. It is not just logs or print statements.…