Playing with Docker.

docker.commands.txt

# creates a container.
docker run

# stops it.
docker stop

# will start it again.
docker start

# restarts a container.
docker restart

# deletes a container.
docker rm

# sends a SIGKILL to a container.
docker kill

# will connect to a running container.
docker attach

# blocks until container stops.
docker wait

# shows running containers.
docker ps

# looks at all the info on a container (including IP address).
docker inspect

# gets logs from container.
docker logs

# gets events from container.
docker events

# shows public facing port of container.
docker port

# shows running processes in container.
docker top

# shows changed files in the container's FS.
docker diff

# -a shows running and stopped containers.
docker ps

# shows all images.
docker images

# creates an image from a tarball.
docker import

# creates image from Dockerfile.
docker build

# creates image from a container.
docker commit

# removes an image.
docker rmi

# to login to a registry.
docker login

# searches registry for image.
docker search

# pulls an image from registry to local machine.
docker pull

# pushes an image to the registry from local machine.
docker push

# obtain container's ip
docker inspect <container id> | grep IPAddress | cut -d '"' -f 4

# obtain environment settings
docker run ubuntu env 

# show image dependencies
docker images -viz | dot -Tpng -o docker.png

# remove old containers
docker ps -a | grep 'weeks ago' | awk '{print $1}' | xargs docker rm

# stop / remove all Docker containers (https://coderwall.com/p/ewk0mq)

docker stop $(docker ps -a -q)
docker rm $(docker ps -a -q)

example-docker-py.py

import docker

c = docker.Client(base_url='unix://var/run/docker.sock')

c.login('username', password='xxxxx', email='my@email.com')

# show images
c.images()

# pull an image from docker repository
c.pull('arthuralvim/docker-ubuntu-ssh', tag=None, stream=False)

# container commands

# + list containers
c.containers(all=False)

# + create a container
container_id = c.create_container('arthuralvim/docker-ubuntu-ssh', command=None, name='teste')

# + start the container again
c.start(container_id, port_bindings={80: ('127.0.0.1', 8080), 22: ('127.0.0.1', 2222)})

# + inspect container info
container_info = c.inspect_container(container_id)
container_port = container_info['NetworkSettings']['Ports']
container_ip = container_info['NetworkSettings']['IPAddress']

# do some changes here and then... 

# + commit changes
c.commit(container_id)

# + stop a container
c.stop(container_id)

# or

# + kill all processes running in the container
c.kill(container_id)

# + remove a container
c.remove_container(container_id)

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

VAGRANTFILE_API_VERSION = "2"

$script = <<-SCRIPT
apt-get update
locale-gen en_US en_US.UTF-8 pt_BR pt_BR.utf8 pt_PT.utf8
dpkg-reconfigure locales
apt-get install -y --force-yes curl git
curl https://get.docker.io/ubuntu/ | sudo sh
usermod -aG docker vagrant
SCRIPT

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|

    config.vm.box = "ubuntudocker"
    config.vm.box_url = "http://nitron-vagrant.s3-website-us-east-1.amazonaws.com/vagrant_ubuntu_12.04.3_amd64_virtualbox.box"
    config.vm.network "forwarded_port", guest: 80, host: 8080
    config.vm.network "forwarded_port", guest: 22, host: 2222, id: 'ssh'
    config.vm.network "private_network", ip: "33.33.33.33"

    # Setup port forwarding per loaded environment variables
    for port in 49000..49900
        config.vm.network "forwarded_port", guest: port, host: port, auto_correct: true
    end

    config.vm.boot_timeout = 60

    config.ssh.username = "vagrant"
    config.ssh.password = "vagrant"
    config.ssh.host = "127.0.0.1"
    config.ssh.port = "2222"

    config.vm.provision "shell", inline: $script

end