01-docker-machine

Docker Workshop - Docker machine

In this section we'll introduce docker-machine.

Install Docker Toolbox

Download and install Docker Toolbox.

The toolbox installs a handful of tools on your local Windows or Mac OS X computer. In this exercise, you use two of those tools:

• Docker Machine: To deploy virtual machines that run Docker Engine
• VirtualBox: To host the virtual machines deployed from Docker Machine

Create a VM running Docker

Open a terminal on your computer.

Create and run a VM named default using the following command:

docker-machine create -d virtualbox default

You can list the existing docker-machines:

docker-machine ls

In case you already had the machine created, you can simply start the VM:

docker-machine start default

Run a docker container in a docker-machine

Now, let's use the docker-machine we've just created. We want to run the hello-world.

If you use Mac, you need to run:

eval $(docker-machine env default)

This command set the DOCKER_HOST variable to the IP of your default docker-machine.

Then we can run the hello-world container:

docker run hello-world

Clean up

After we tested our default docker-machine we want to remove it from our computer.

Stop the VM named default:

docker-machine stop default

You can destroy the VM named default:

docker-machine rm default

Create two machines

To create two machines do:

docker-machine create -d virtualbox client1
docker-machine create -d virtualbox client2

Now you can see the machines with:

docker-machine ls

Run Nginx on client1

eval $(docker-machine env client1)
docker run -d -p 80:80 nginx:1.8-alpine
docker-machine ip client1
open "http://$(docker-machine ip client1)"

Run Nginx on client2

eval $(docker-machine env client2)
docker run -d -p 80:80 nginx:1.8-alpine
docker-machine ip client2
open "http://$(docker-machine ip client2)"

SSH to machine

To SSH inside a machine:

docker-machine ssh client1

Environment variables

Docker client is configured by environment variables to connect with remote daemons. The following command outputs the variables for connecting to previously created default VM.

docker-machine env default

Active Machine

To get the active machine's name do:

docker-machine active

Cleanup

docker-machine stop client1 client2
docker-machine rm client1 client2

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Credits

This workshop was prepared by harbur.io, under MIT License. Feel free to fork and improve.