docker及nvidia-docker2安装

docker安装

安装nvidia-docker2也要先安装docker

 #删除系统原有docker 如果提示找不到就不用理会 
sudo apt-get remove docker docker-engine docker.io
sudo apt-get update #更新apt-get源 
 #安装docker的依赖 
sudo apt-get install apt-transport-https ca-certificates curl gnupg2 software-properties-common
#信任 Docker 的 GPG 公钥
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add - 
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" # 添加源 可以替换为清华源
sudo add-apt-repository "deb [arch=amd64] https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/ubuntu $(lsb_release -cs) stable" # 清华源
sudo apt-get update
sudo apt-get install docker-ce

apt-cache madison docker-ce ###加载docker 
sudo docker run hello-world ###验证docker是否安装成功。

查看docker版本： docker version

nvidia-docker2安装

For first-time users of Docker 19.03 and GPUs, continue

# Add the package repositories
distribution=$(. /etc/os-release;echo $ID$VERSION_ID)
curl -s -L https://nvidia.github.io/nvidia-docker/gpgkey | sudo apt-key add -
curl -s -L https://nvidia.github.io/nvidia-docker/$distribution/nvidia-docker.list | sudo tee /etc/apt/sources.list.d/nvidia-docker.list

sudo apt-get update && sudo apt-get install -y nvidia-container-toolkit
sudo systemctl restart docker

# 验证是否成功，cuda要选当前使用的版本
docker run --gpus all nvidia/cuda:10.0-base nvidia-smi

Error

1. fork/exec /usr/bin/nvidia-container-runtime: no such file or directory: unknown
   原因：没有安装nvidia-container-runtime包
2. docker: Error response from daemon: Unknown runtime specified nvidia
   原因：nvidia runtime没有注册，用--runtime选项会报错
   办法：

# 写override.conf
sudo mkdir -p /etc/systemd/system/docker.service.d
sudo tee /etc/systemd/system/docker.service.d/override.conf <<EOF
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd --host=fd:// --add-runtime=nvidia=/usr/bin/nvidia-container-runtime
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

# 写daemon.json
sudo tee /etc/docker/daemon.json <<EOF
{
    "runtimes": {
        "nvidia": {
            "path": "/usr/bin/nvidia-container-runtime",
            "runtimeArgs": []
        }
    }
}
EOF
sudo pkill -SIGHUP dockerd