Docker

Basic commands

List all containers

docker ps -a

List all my images

docker images

Commit your container to a new named image

docker commit <container> <some_name>

Basics

https://gist.github.com/dtuite/b595308c11e5bd251117

There are two programs:

   The docker daemon - a server process which manages all the containers
   The docker client - a remote control for the daemon

You can list the commands of the docker client by typing

docker

with no arguments.

You can use container images which have been created by other people. You find them online in the docker index. You can search for images using

docker search [keywords].

Container images are downloaded using

docker pull [image name].

Containers are unstarted by default. You can run commands in a container using the syntax:

docker run [image name] [command to run]

For example, we can install the program "ping" in the container with the command (note: the -y flag instructs apt-get to not ask us to confirm the changes we're about to make):

docker run learn/tutorial apt-get install -y ping

The changes we have made to the container are not yet saved. To save the container, we first need to find it's id:

docker ps -l

Once we have the first few chars of the id, we can save the container with a new image name using:

docker commit [id] [new image name]

We can now run the ping command on our container using:

docker run learn/ping ping www.google.com

We can use

docker ps

and

docker inspect [container id]

to learn about available containers.

We can share images using

docker push [image name.

Install automatic virtualhosts

docker pull jwilder/nginx-proxy
docker run -d -p 80:80 -v /var/run/docker.sock:/tmp/docker.sock jwilder/nginx-proxy

Run any other container with the VIRTUAL_HOST

docker run -d -e VIRTUAL_HOST=domain1.com thiagomarini/apache-php
docker run -d -e VIRTUAL_HOST=domain2.com tomcat

Install Foswiki container

on Ubuntu

docker run -t -i -p 8888:80 svendowideit/ubuntu-foswiki /bin/bash then goto http://localhost:8888/foswiki

on Centos

• Create a folder
• Create the Dockerfile similar to https://github.com/SvenDowideit/dockerfiles/blob/master/centos-foswiki/Dockerfile

docker build -t svendowideit/centos-foswiki .

run the image by:

docker run -p 8080:80 -i -t svendowideit/centos-foswiki /bin/bash