使用pytorch cuda11 cudnn8.02 Docker搭建nnUNet训练环境

（2020-10- 30更新）pytorch官网已经更新了pytorch1.7，适配了cuda11和cudnn8，本文依然可以作为docker使用教程

本文目的是加速训练过程，平时使用pytorch1.6 cuda10.2训练一个epoch将近400秒，搭建好docker环境后，使用cuda11、cudnn8.0.2 的环境，一个epoch的时间只需要160秒左右。加速非常明显。

问题来源于：https://github.com/MIC-DKFZ/nnUNet/issues/292

项目主仓库 ：https://github.com/MIC-DKFZ/nnUNet

测试环境：

软件环境：

• Linux：Ubuntu 16/18/20，或者其他发行版本

硬件要求：

• 显卡：RTX2080TI 或者更高的型号 ，显卡驱动 大于Driver Version: 450.51.06
• CPU：Inel i5-9600K或者更高性能的处理器
• 磁盘：SSD 500G或者更大容量

参考

• Docker 入门教程
• Installation Guide
• nnU-Net : The no-new-UNet for automatic segmentation

Installing on Ubuntu and Debian

The following steps can be used to setup NVIDIA Container Toolkit on Ubuntu LTS - 16.04, 18.04, 20.4 and Debian - Stretch, Buster distributions.

Docker-CE on Ubuntu can be setup using Docker’s official convenience script:

curl https://get.docker.com | sh

sudo systemctl start docker && sudo systemctl enable docker

Setup the stable repository and the GPG key:

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

Note：To get access to experimental features such as CUDA on WSL or the new MIG capability on A100, you may want to add the experimental branch to the repository listing:

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

Install the nvidia-docker2 package (and dependencies) after updating the package listing:

sudo apt-get update

sudo apt-get install -y nvidia-docker2

Restart the Docker daemon to complete the installation after setting the default runtime:

sudo systemctl restart docker

At this point, a working setup can be tested by running a base CUDA container:

$ sudo docker run --rm --gpus all nvidia/cuda:11.0-base nvidia-smi

+-----------------------------------------------------------------------------+
| NVIDIA-SMI 450.51.06    Driver Version: 450.51.06    CUDA Version: 11.0     |
|-------------------------------+----------------------+----------------------+
| GPU  Name        Persistence-M| Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp  Perf  Pwr:Usage/Cap|         Memory-Usage | GPU-Util  Compute M. |
|                               |                      |               MIG M. |
|===============================+======================+======================|
|   0  Tesla T4            On   | 00000000:00:1E.0 Off |                    0 |
| N/A   34C    P8     9W /  70W |      0MiB / 15109MiB |      0%      Default |
|                               |                      |                  N/A |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes:                                                                  |
|  GPU   GI   CI        PID   Type   Process name                  GPU Memory |
|        ID   ID                                                   Usage      |
|=============================================================================|
|  No running processes found                                                 |
+-----------------------------------------------------------------------------+

Adding the NVIDIA Runtime

https://docs.nvidia.com/datacenter/cloud-native/container-toolkit/user-guide.html

Use dockerd to add the nvidia runtime:

$ sudo dockerd --add-runtime=nvidia=/usr/bin/nvidia-container-runtime [...]

Reload the Docker settings for the systemd daemon.

$ sudo systemctl daemon-reload

Restart the docker service.

$ sudo systemctl restart docker

After that，

Starting a GPU enabled CUDA container; using --gpus

$ docker run --rm --gpus all nvidia/cuda nvidia-smi

更改docker默认的存储路径

默认情况下，docker镜像的默认存储路径是/var/lib/docker，这相当于直接挂载系统目录下，而一般在搭系统时，这个区都不会太大，所以如果长期使用docker开发应用，就需要把默认的路径更改到需要路径下或外挂存储

1、docker镜像的默认路径

$ docker info  
 Docker Root Dir: /var/lib/docker 

2、为了解决这个问题, 计划将docker的默认存储路径从/var/lib/docker中移出去

方法:

$ mkdir /home/gy501/docker
$ cd  /home/gy501/docker

3、修改docker的systemd的docker.service的配置文件

不知道 配置文件在哪里可以使用systemd 命令显示一下

$ systemctl enable docker

Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.

4、修改docker.service文件. 图像界面下，使用gedit，命令行下使用vim

$ sudo gedit /usr/lib/systemd/system/docker.service

​ 在打开的文本编辑器中，更改以下内容 --graph 后面的路径

ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock --graph=/home/gy501/docker

5、 重新enable 一下docker 服务 重新进行软连接 以及进行一次 daemon-reload

$ systemctl daemon-reload
$ systemctl restart docker

6、查看docker info 信息

$ docker info  
Docker Root Dir: /home/gy501/docker

拉取镜像

1、使用命令直接拉取镜像，请点击链接获取最新的的版本

镜像地址为：https://ngc.nvidia.com/catalog/containers/nvidia:pytorch

镜像源在国外，拉取速度较慢，镜像大小有4g左右

$ docker pull nvcr.io/nvidia/pytorch:20.09-py3

拉取完成后，使用下面命令查看已有的镜像

$ docker images

(base) gy501@gy501-ms-7b51f:~$ docker images
REPOSITORY               TAG                 IMAGE ID            CREATED             SIZE
nvcr.io/nvidia/pytorch   20.09-py3           86042df4bd3c        5 weeks ago         11.1GB
nvidia/cuda              11.0-base           2ec708416bb8        8 weeks ago         122MB 

启动容器

本地机器使用方法，

$ sudo docker run --gpus all -it --rm --ipc=host -v /media/gy501/SSD/nnunet:/workspace/nnunet nvcr.io/nvidia/pytorch:20.09-py3

--ipc==host可以避免docker报内存不足

详情参考下面官方文档：

1. Run the container image.

   If you have Docker 19.03 or later, a typical command to launch the container is:

   $ docker run --gpus all -it --rm -v local_dir:container_dir nvcr.io/nvidia/pytorch:xx.xx-py3
   

   Where:

   • -it means run in interactive mode

   • --rm will delete the container when finished

   • -v is the mounting directory

   • local_dir is the directory or file from your host system (absolute path) that you want to access from inside your container. For example, the local_dir in the following path is /home/jsmith/data/mnist.

     -v /home/jsmith/data/mnist:/data/mnist
     

     If you are inside the container, for example, ls /data/mnist, you will see the same files as if you issued the ls /home/jsmith/data/mnist command from outside the container.

   • container_dir is the target directory when you are inside your container. For example, /data/mnist is the target directory in the example:

     -v /home/jsmith/data/mnist:/data/mnist
     

   • xx.xx is the container version. For example, 20.01.

   • command is the command you want to run in the image.

   Note: DIGITS uses shared memory to share data between processes. For example, if you use Torch multiprocessing for multi-threaded data loaders, the default shared memory segment size that the container runs with may not be enough. Therefore, you should increase the shared memory size by issuing either:

   --ipc=host
   

   or

   --shm-size=
   

   in the command line to:

   docker run --gpus all
   

​ See /workspace/README.md inside the container for information on customizing your PyTorch image.

nnUnet配置教程

1、配置路径，在/media/gy501/SSD/nnunet配置好数据处理的目录，并把nnUnet的源码放到该目录下，其中 nnUNet-1.6.4为源码文件夹，可以在官方仓库找到

(base) gy501@gy501-ms-7b51f:/media/gy501/SSD/nnunet$ ls
  nnUNet-1.6.4     nnUNet_raw     config.sh   nnUNet_preprocessed   nnUNet_trained_models

2、在目录下创建一个config.sh文件，用于配置容器内部的一些设置，内容如下

#!/bin/bash
#设置工作目录
export nnUNet_raw_data_base="/workspace/nnUNet_raw" 
export nnUNet_preprocessed="/workspace/nnUNet_preprocessed" 
export RESULTS_FOLDER="/workspace/nnUNet_trained_models"  
echo $RESULTS_FOLDER
#设置pip源，这里使用改成阿里源
#清华源
pip config set global.index-url http://mirrors.aliyun.com/pypi/simple/
pip config set install.trusted-host mirrors.aliyun.com

#根据源码的具体文件名和路径修改-e 后面的路径名
pip install -e ./nnUNet-1.6.4
echo "done!"

3、启动容器

$ sudo docker run --gpus all -it --rm --ipc=host -v /media/gy501/SSD/nnunet:/workspace/nnunet nvcr.io/nvidia/pytorch:20.09-py3

容器内，/workspace/nnunet 的内容和/media/gy501/SSD/nnunet完全一样。

4、加载配置，启动容器后，默认路径为/workspace ,使用pwd 查看当前路径，ls 列出目录下的内容

$ pwd
$ cd nnunet
$ sudo sh config.sh

5、预处理、训练网络、推理命令，不再赘述

#预处理
nnUNet_plan_and_preprocess -t 66
#训练
nnUNet_train 3d_fullres nnUNetTrainerV2 66 4

#推理
nnUNet_predict -i /workspace/nnunet/nnUNet_raw/nnUNet_raw_data/Task066_hepaticduct/imagesTs/ -o /workspace/nnunet/nnUNet_raw/nnUNet_raw_data/Task066_hepaticduct/inferTs -t 8 -m 3d_fullres -f 4

done！