docker.md

install static binaries

• Docker daemon binary dockerd
• Docker client docker

1. Download the static binary archive: https://download.docker.com/linux/static/stable/
2. Extract the archive tar xzvf /path/to/<FILE>.tar.gz
3. Optional: move the binaries to a directory on your executable path sudo cp docker/* /usr/bin
4. start the docker daemon sudo dockerd & additional options: create and edit the file /etc/docker/daemon.json
5. verify by running the hello-world image sudo docker run hello-world

install in Arch

sudo pacman -S docker
systemctl start docker
sudo docker info

run docker as a regular user, add your user to the docker user group.

sudo groupadd docker
sudo gpasswd -a *user* docker # sudo usermod -aG docker $USER
newgrp docker 

configure

1. docker.service systemd unit file or
2. /etc/docker/daemon.json file

configure both cause a conflict that prevents Docker from starting.

Terminology

1. Images - The file system and configuration of our application which are used to create containers.
2. Containers - Running instances of Docker images.
3. Docker daemon - The background service running on the host that manages building, running and distributing Docker containers.
4. Docker client - The command line tool that allows the user to interact with the Docker daemon.
5. Docker Hub - A registry of Docker images.

use it

docker pull alpine

# pull specific version of image
docker pull ubuntu:12.04

# search images
docker search

# images that are available locally
docker images
docker inspect alpine

# run in an interactive terminal 
docker run -it alpine /bin/sh

# automatically deletes the container once it's exited from
docker run --rm

# containers that are currently running
docker ps

# containers that you ran
docker ps -a

# stop and delete
docker stop CONTAINER_ID
docker rm CONTAINER_ID
docker rm -f NAMES

# stop all running dockers
docker stop $(docker ps -a -q)

# remove all containers
docker rm $(docker ps -a -q)

docker rm $(docker ps -a -q -f status=exited)

docker container prune

# delete images that you no longer need by running docker rmi
docker rmi