Introduction
Install
sudo apt-get update && sudo apt-get upgrade
curl -sSL https://get.docker.com | sh
Setting
Create the docker group.
sudo groupadd docker
Add a Non-Root User to the Docker Group
sudo usermod -aG docker [user_name]
sudo usermod -aG docker ${USER}
sudo usermod -aG docker pi
You would need to loog out and log back in so that your group membership is re-evaluated or type the following command:
su -s ${USER}
Check your env
cat /proc/cpuinfo | grep model
cat /etc/os-release
analyze an image file
https://github.com/wagoodman/dive
Verify
docker run hello-world
docker image pull nginx
docker image inspect nginx
Cheatsheet
Build
Build an image from the Dockerfile in the current directory and tag the image
docker build -t myimage:1.0 .
List all images that are locally stored with the Docker Engine
docker image ls
Delete an image from the local image store
docker image rm alpine:3.4
Remove all image
docker rmi $(docker images -a -q)
docker container rm $(docker container ls -aq)
Run
docker run -it <image> /bin/bash
Run a container from the Alpine version 3.9 image, name the running container “web” and expose port 5000 externally, mapped to port 80 inside the container.
docker container run --name web -p 5000:80 alpine:3.9
Stop a running container through SIGTERM
docker container stop web
Stop a running container through SIGKILL
docker container kill web
List the networks
docker network ls
List the running containers (add --all to include stopped containers)
docker container ls
Delete all running and stopped containers
docker container rm -f $(docker ps -aq)
Print the last 100 lines of a container’s logs
docker container logs --tail 100 web
Share
Copy Docker images to another host
To get the image id:
sudo docker images
Say you have an image with id(REPOSITORY) "table-data".
Save the image with id:
sudo docker save -o /home/table/table-data.tar table-data
Copy the image from the path to any host. Now import to your local Docker installation using:
sudo docker load -i <path to copied image file>
hub
Choose Docker Base Image Wisely
https://towardsdatascience.com/how-to-build-slim-docker-images-fast-ecc246d7f4a7
https://pythonspeed.com/articles/base-image-python-docker-images/