ubuntu 18 cuda 11.8 安装 vllm

根据官方文档

# Install vLLM with CUDA 11.8.
export VLLM_VERSION=0.4.0
export PYTHON_VERSION=310
pip install https://github.com/vllm-project/vllm/releases/download/v${VLLM_VERSION}/vllm-${VLLM_VERSION}+cu118-cp${PYTHON_VERSION}-cp${PYTHON_VERSION}-manylinux1_x86_64.whl --extra-index-url https://download.pytorch.org/whl/cu118

安装后启动

python -m vllm.entrypoints.openai.api_server \
    --model Qwen/Qwen2-7B-Instruct \
    --tensor-parallel-size 2 \
    --port 9191

报错

Failed to import NCCL library: libnccl.so.2: cannot open shared object file: No such file or directory

需要安装官方nccl

https://developer.nvidia.com/nccl/nccl-legacy-downloads

wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-keyring_1.0-1_all.deb
sudo dpkg -i cuda-keyring_1.0-1_all.deb
sudo apt-get update


sudo apt install libnccl2=2.15.5-1+cuda11.8 libnccl-dev=2.15.5-1+cuda11.8