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Quickstart

This guide starts the local Docker stack and sends a request through the Router. The Router itself runs on CPU; the model backend can be local or remote.

Requirements​

  • Python 3.10 or newer
  • Docker
  • Linux, macOS, or WSL2 on Windows

Native Windows Python can run configuration and validation commands, but the local Docker serving workflow requires WSL2 or another Linux environment.

Install​

One-line installer​

On macOS or Linux:

curl -fsSL https://vllm-sr.ai/install.sh | \
  bash -s -- --channel stable

The installer creates an isolated CLI environment, adds a launcher under ~/.local/bin, prepares Docker, and starts vllm-sr serve unless you opt out. It prints the Dashboard URL and, on a remote host, an SSH tunnel hint.

Install with pip​

python -m venv vsr
source vsr/bin/activate
pip install vllm-sr
vllm-sr --version

To test a development build, select an explicit published development version or install from a reviewed source checkout. The pip --pre flag only permits prereleases; it does not guarantee that pip will prefer one over a newer stable release.

Open or start the local stack​

The one-line installer starts the stack automatically; continue to the Dashboard URL it prints. If you installed with pip or passed --no-launch, run the following command from the directory where you want to keep config.yaml and local runtime state:

vllm-sr serve

On the first run, an empty workspace starts the Dashboard in setup mode. Open http://localhost:8700, then:

  1. add one or more model endpoints;
  2. choose a routing preset or a single-model baseline; and
  3. activate the generated configuration.

Activation writes config.yaml and starts the inference listener. The local stack exposes Envoy at http://localhost:8899 by default.

Want a local model?

Follow Local model with Ollama if you want a simple local backend without setting up vLLM or a GPU environment.

Send a request​

After activation:

curl http://localhost:8899/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "vllm-sr/auto",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

Use the model name shown by your active configuration. A virtual model resolves to its recipe; a configured physical model name is sent directly to that backend.

Operate the stack​

vllm-sr status
vllm-sr logs router
vllm-sr logs envoy -f
vllm-sr dashboard
vllm-sr stop

The Dashboard can show bounded Router, Envoy, and Dashboard logs for supported local stacks. Log access is permission-controlled, and service output may contain tenant or credential-adjacent data. Treat both Dashboard log access and the local log directory as sensitive.

Start from YAML​

If you already have a complete canonical config:

vllm-sr validate --config config.yaml
vllm-sr serve --config config.yaml

Environment references such as ${MODEL_API_KEY} are resolved from the launch environment. Do not put literal credentials in a config that will be shared or committed.

For older configs, use:

vllm-sr config migrate --config old-config.yaml

Next​

For support, open a GitHub issue or join the #semantic-router channel in vLLM Slack.