Environment Variables

vLLM uses the following environment variables to configure the system:

!!! warning Please note that VLLM_PORT and VLLM_HOST_IP set the port and ip for vLLM's internal usage. It is not the port and ip for the API server. If you use --host $VLLM_HOST_IP and --port $VLLM_PORT to start the API server, it will not work.

Most vLLM-specific environment variables are prefixed with `VLLM_` (a handful of standard names — for example `CUDA_VISIBLE_DEVICES`, `MAX_JOBS`, `S3_ACCESS_KEY_ID`/`S3_SECRET_ACCESS_KEY`/`S3_ENDPOINT_URL`, `DO_NOT_TRACK`, `NO_COLOR` — are also read directly when set). **Special care should be taken for Kubernetes users**: please do not name the service as `vllm`, otherwise environment variables set by Kubernetes might conflict with vLLM's environment variables, because [Kubernetes sets environment variables for each service with the capitalized service name as the prefix](https://kubernetes.io/docs/concepts/services-networking/service/#environment-variables).

python

--8<-- "vllm/envs.py:env-vars-definition"