解决 Ubuntu18.10 安装 Nvidia-docker2及安装问题解决

1. Nvidia-docker2安装

参考 ：官方教程
系统版本：Ubuntu 14.04/16.04/18.04, Debian Jessie/Stretch
If you have nvidia-docker 1.0 installed: we need to remove it and all existing GPU containers

docker volume ls -q -f driver=nvidia-docker | xargs -r -I{} -n1 docker ps -q -a -f volume={} | xargs -r docker rm -f
sudo apt-get purge -y nvidia-docker

Add the package repositories

curl -s -L https://nvidia.github.io/nvidia-docker/gpgkey | \
  sudo apt-key add -
distribution=$(. /etc/os-release;echo $ID$VERSION_ID)
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

Install nvidia-docker2 and reload the Docker daemon configuration

sudo apt-get install -y nvidia-docker2
sudo pkill -SIGHUP dockerd

Test nvidia-smi with the latest official CUDA image

docker run --runtime=nvidia --rm nvidia/cuda:9.0-base nvidia-smi

2.遇到问题：

当输入： sudo apt-get install -y nvidia-docker2时提示如下问题。

解决：
添加源https://download.docker.com/
Uninstall old versions

sudo apt-get remove docker docker-engine docker.io containerd runc

Install packages to allow apt to use a repository over HTTPS:

sudo apt-get install \
    apt-transport-https \
    ca-certificates \
    curl \
    gnupg2 \
    software-properties-common

Add Docker’s official GPG key:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Verify that you now have the key with the fingerprint 9DC8 5822 9FC7 DD38 854A E2D8 8D81 803C 0EBF CD88, by searching for the last 8 characters of the fingerprint.

sudo apt-key fingerprint 0EBFCD88 

提示：

pub   rsa4096 2017-02-22 [SCEA]
      9DC8 5822 9FC7 DD38 854A  E2D8 8D81 803C 0EBF CD88
uid           [ 未知 ] Docker Release (CE deb) 
sub   rsa4096 2017-02-22 [S]

Use the following command to set up the stable repository.

sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

重新安装：

sudo apt install -y docker-ce nvidia-docker2

启动docker:

sudo pkill -SIGHUP dockerd

3.遇到问题：

docker run --runtime=nvidia --rm nvidia/cuda:9.0-base nvidia-smidocker: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.39/containers/create: dial unix /var/run/docker.sock: connect: permission denied.
See ‘docker run --help’.

解决：参考Docker启动Get Permission Denied

解决方法1：
使用sudo获取管理员权限，运行docker命令。
解决方法2：

sudo groupadd docker     #添加docker用户组
sudo gpasswd -a $USER docker     #将登陆用户加入到docker用户组中
newgrp docker     #更新用户组
docker ps    #测试docker命令是否可以使用sudo正常使用

Test nvidia-smi with the latest official CUDA image

docker run --runtime=nvidia --rm nvidia/cuda:9.0-base nvidia-smi

参考博客：
解决 Ubuntu18.10 无法安装 Nvidia-docker2
unbuntu 安装docker、nvidia-docker2