Playing with Kubernetes

Last hacknight at Peertransfer we were playing with Kubernetes and Docker. Kubernetes is a Docker cluster orchestrator. In this article there is a very detailed description and explanation of what Kubernetes can do.
Here, I am going to transcribe my notes about how we deployed and tested Kubernetes basics in less than an hour.
First of all you need a DigitalOcean account and you have to deploy the Docker APP VM.  I like DigitalOcean because it is fast, cheap and clean, but you can use Docker installation wherever you want, for example in Kubernetes doc they use OS X.
In this test you need a GCE (Google Computing engine) account too, because we are going to deploy VMs (minions) on this platform.

Starting with Docker

Definition from Wikipedia

Docker is an open-source project that automates the deployment of applications inside software containers, by providing an additional layer of abstraction and automation of operating system–level virtualization onLinux.[2] Docker uses resource isolation features of the Linux kernel such as cgroups and kernel namespaces to allow independent "containers" to run within a single Linux instance, avoiding the overhead of starting virtual machines.[3]

What about Docker?

Docker reminds me old isolation container technology, such as Solaris Zones, *BSD Jails or even Linux OpenVZ. In fact, it is the same technology. Docker uses LXC linux kernel module that derivates from OpenVZ.
Docker is newer, better and simpler than the old alternatives. It provides you with an API, a Container repository and an easy CLI management interface. These points make Docker really powerful and modern.