Docker_example

how to install and show examples of using various docker images

Installation

How to install 'Docker-ce'

• description link (1)
• description link (2)
  • what are differences between CE and EE (CE: community edition, EE: enterprise edition)

Install docker

sudo apt update
sudo apt install apt-transport-https ca-certificates curl software-properties-common
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"
sudo apt update
apt-cache policy docker-ce
sudo apt install docker-ce docker-ce-cli containerd.io 

Check the installation

docker --version

Change setting to use docker without 'sudo'

• how to solve permission error (1)
• how to solve permission error (2)

### temperary solution
sudo chmod 666 /var/run/docker.sock

### permanent solution
sudo usermod -a -G docker $USER
sudo service docker restart
# After this, please restart your computer.

How to install nvidia-docker to use nvidia setting in dockers

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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 nvidia-container-toolkit
sudo apt-get install nvidia-docker2
sudo systemctl restart docker

### check the installation
docker run --rm --gpus all nvidia/cuda:11.2.2-base nvidia-smi

Command Practice and Tips for using docker

Commands

• easy tutorial with docker (1)
• easy tutorial with docker (2)

docker images

• check installed images

docker images

docker pull

• download images from docker hub

docker search ubuntu
docker pull ubuntu  # default tag: latest
## OR other version of ubuntu
docker pull ubuntu:xenial

docker ps

• check existing containers

docker ps -a

• check only running containers

docker ps

docker run

• launch new container with image

# docker run <options> <image> <command>
docker run -it --rm ubuntu /bin/bash

# in another host terminal
docker ps -a
docker ps

docker run -it --name hello ubuntu /bin/bash

docker start/stop/attach/restart

• docker can be run in back/foreground

# docker start/stop/attach/restart <container>
docker start hello   ## if you run this command, you can run docker container in background
docker attach hello  ## connecting standard input(stdin) and standard output(stdout) to a running container

docker exec

• it can execute a command inside a container from outside
• typically used to connect another terminal to a container

docker exec -it hello /bin/bash

docker inspect

• check container information (ip, port, etc.)

# docker inspect <container>
docker inspect hello

docker cp

• Copy file to/from container

touch hello.txt
# docker cp <container>:<docker-path> <host-path>
# docker cp <host-path> <container>:<docker-path>
docker cp ./hello.txt hello:/home
docker cp hello:/home/hello.txt ../

docker commit

• create an image of changes made to a container

# docker commit <container> <repository>/<image>:<tag>
docker commit hello jjimin/ubuntu:1.0

Tips

how to delete 'none' docker image

docker rmi $(docker images -f "dangling=true" -q)

how to use sudo and added user

# example with ROS image
# Shell (1)
docker run --rm --user root --name <container-name> ros:foxy-ros-base /bin/bash
# inside of container
apt install sudo
useradd --user-group --system --create-home --no-log-init --shell /bin/bash <user-name>
echo "<user-name>:<user-name>" | chpasswd && adduser <user-name> sudo

# Shell (2)
# outside of container
docker commit <container-name> <new-image-name>

# Shell (1)
# inside of container
exit
# outside of container
docker run --rm --user <user-name> --workdir /home/<user-name> --name <container-name> <new-image-name> /bin/bash

# Shell (2)
# outside of container
docker commit <container-name> <new-image-name>

how to install VS-Code

sudo apt update
sudo apt install software-properties-common apt-transport-https wget
wget -q https://packages.microsoft.com/keys/microsoft.asc -O- | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://packages.microsoft.com/repos/vscode stable main"
sudo apt update
sudo apt install code

Examples of using various docker images

How to install 'ROS docker image'

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• ROS docker image

docker pull ros:kinetic-ros-base-xenial

How to install 'pyTorch 1.3 docker image'

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• pytorch 1.3 docker image

docker pull pytorch/pytorch:1.3-cuda10.1-cudnn7-devel

How to install and use 'CARLA-ROS docker image'

• CARLA-ROS docker image

# download the image
docker pull jjimin/carla-ros:18.04-foxy-0.9.11_v1.0

# create a container with the image
docker run -it --rm --privileged --net=host --runtime=nvidia --gpus all -e NVIDIA_VISIBLE_DEVICES=0 -e NVIDIA_DRIVER_CAPABILITIES=all -e QT_X11_NO_MITSHM=1 -v /tmp/.X11-unix:/tmp/.X11-unix -v /dev/shm:/dev/shm -e DISPLAY=unix$DISPLAY \
-v ~/Data:/data --name test-01 jjimin/carla-ros:18.04-foxy-0.9.11_v1.0 /bin/bash