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This release is a pre-release and may not be stable for production use.

vLLM Semantic Router

Intelligent Router for Mixture-of-Models (MoM).

GitHub: https://github.com/vllm-project/semantic-router

Quick Start

Installation

# Install from PyPI
pip install vllm-sr

# Or install from source (development)
cd src/vllm-sr
pip install -e .

Usage

# Initialize vLLM Semantic Router Configuration
vllm-sr init

# Start the router (includes dashboard)
vllm-sr serve

# Open dashboard in browser
vllm-sr dashboard

# View logs
vllm-sr logs router
vllm-sr logs envoy
vllm-sr logs dashboard

# Check status
vllm-sr status

# Stop
vllm-sr stop

Features

  • Router: Intelligent request routing based on intent classification
  • Envoy Proxy: High-performance proxy with ext_proc integration
  • Dashboard: Web UI for monitoring and testing (http://localhost:8700)
  • Metrics: Prometheus metrics endpoint (http://localhost:9190/metrics)

Endpoints

After running vllm-sr serve, the following endpoints are available:

Endpoint Port Description
Dashboard 8700 Web UI for monitoring and Playground
API 8888* Chat completions API (configurable in config.yaml)
Metrics 9190 Prometheus metrics
gRPC 50051 Router gRPC (internal)

*Default port, configurable via listeners in config.yaml

Configuration

File Descriptor Limits

The CLI automatically sets file descriptor limits to 65,536 for Envoy proxy. To customize:

export VLLM_SR_NOFILE_LIMIT=100000  # Optional (min: 8192)
vllm-sr serve

License

Apache 2.0

Metadata

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