Thursday, February 12, 2015

Docker on Ubuntu on Hyper-V 2012 R2

I recently read through an MSDN article that described running Docker in a VM on Hyper-V.

Frankly, I was less than impressed at the complexity of the solution.  Especially since the concept here is not a huge leap.

The basic steps are:
  1. Build a VM on Hyper-V
  2. Install Docker into that VM
  3. Run containers in that VM
This achieves a couple things.
  • Your Docker containers are isolated within a VM. 
This is actually an important thing.  Docker has its own networking stack, but it also allows exposing the underlying storage to the VM to support things like databases and configurations or even updating source easily. 
The model here is one VM per tenant.  Thus forming that boundary and still getting the flexibility of both containers and VMs.
  • You can run the OS of your choice.
In my experimentation I have been using Ubuntu.  Mainly because it has good support, but primarily because they are right up to date with the kernel.  This gives me the latest Hyper-V support within that VM.

So, you want to setup Docker in a VM.  There are a few steps as I am outlining this in gory detail.  Here is goes:

  1. Install Ubuntu in the VM (14.04 LTS Server) or 14.10
  2. Add OpenSSH Server
  3. Determine IP
  4. Connect over SSH
  5. Update
    1. sudo apt-get update
  6. Upgrade the components (aka patch the OS)
    1. sudo apt-get upgrade -y
  7. Add Docker gpg key (that is 'qO' not 'qZero')
    1. sudo sh -c "wget -qO- | apt-key add -" 
  8. Update the app list
    1. sudo sh -c "echo deb docker main\ >> /etc/apt/sources.list.d/docker.list"
  9. Update the local apt repository after adding the docker reference
    1. sudo apt-get update
  10. Install (latest) Docker (on 12/15/14 this is 1.4.0)
    1. sudo apt-get install lxc-docker -y
Now you are ready to play with the magic of Containers.

1 comment:

Anonymous said...

thanks for this and i agree its much more straighforward approach to running docker via hyper-v