报错信息：

Error response from daemon: Unknown runtime specified nvidia.

1.加key

docker环境安装Nvidia-container-runtime

2.对于已经安装好docker的Ubuntu系统

(1). 首先配置nvidia源

curl -s -L https://nvidia.github.io/nvidia-container-runtime/gpgkey | \
  sudo apt-key add -

distribution=$(. /etc/os-release;echo $ID$VERSION_ID)

curl -s -L https://nvidia.github.io/nvidia-container-runtime/$distribution/nvidia-container-runtime.list | \
  sudo tee /etc/apt/sources.list.d/nvidia-container-runtime.list

sudo apt-get update

(2). 参考https://gitee.com/wuxler/nvidia-container-runtime?_from=gitee_search 安装nvidia-container-runtime

sudo apt-get install nvidia-container-runtime

一键安装docker

wget -qO- https://get.docker.com/ | sh /dev/stdin --mirror Aliyun

2.cd /etc/docker

看看有没有daemon.json，没有就新建 touch daemon.json;

sudo vim daemon.json写入文件

{
    "runtimes": {
        "nvidia": {
            "path": "/usr/bin/nvidia-container-runtime",
            "runtimeArgs": []
         }    
    }
}

3.最重要的重启：！

重启前：sudo docker info

sudo 

root@crist:/etc/docker# sudo service docker stop
root@crist:/etc/docker# sudo service docker start

重启后：Runtimes: io.containerd.runc.v2 io.containerd.runtime.v1.linux nvidia runc

就可以了