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@ -14,11 +14,11 @@ Hi everyone. There are already some weeks since last [DockerCon 2015](http://eur
First of all, some background, although [Docker](https://www.docker.com/what-docker) as a technology or hype or platform - however you conceive it - is in the meantime an already well-known terminology. And a large number of articles have already been published on it in the last two years. Docker was [initially released in 2013](https://en.wikipedia.org/wiki/Docker_\(software\)#History). so it is a relatively new. My first experience with Docker was last year, in Spring 2014, when I was asked to do a prototype implementation for the Haufe editorial system (internally known as HRS). Docker was new, and it was new to me, and I struggled with a lot of does and don'ts when transforming an environment - even the small part choosen for the prototype - that has been grown over years and with heavy data centricity.
So I was excited to visit DockerCon and see how Docker continued to evolve as platform and a very flexible, lightweight virtualization platform. The Docker universe indeed made big steps under the hood, with the tooling around it, and also with a growing number of third party adopters improving many aspects of what Docker is and wants to be. Docker may and will revolutionize the way we will build and deploy software in the future. And the future starts now, in the projects we bring ahead.
So I was excited to visit DockerCon and see how Docker continued to evolve as platform into a very flexible, lightweight virtualization platform. The Docker universe indeed made big steps under the hood, with the tooling around it, and also with a growing number of third party adopters improving many aspects of what Docker is and wants to be. Docker may and will revolutionize the way we will build and deploy software in the future. And the future starts now, in the projects we bring ahead.
##Virtualization and Docker##
The past waves of virtualization are now commodity, has arrived IT and is no longer the domain of development as it was years ago, when we started with VMware for development and testing. It is the basement for nowadays deployment. Virtualization has many aspects and flavours, but one thing is in common: it is rather heavy weighted to build up a virtualization platform, and using it will cause some performance reduction in comparision to deploying software artifacts directly to physical machines - what was still done for this reason, to have maximum throughput and optimal performance for business. But with virtualization we gain flexibility, beeing able to move a virtualized computing unit on the hardware below, especially from an older system to a newer one without having to rebuild, repackage or deploy anything. And it is already a big, well known industry behind virtualization infrastructure and technology.
The past waves of virtualization are now commodity, has reached IT and is no longer the domain of development as it was years ago, when we started with VMware for development and testing. It is the base for nowadays deployment. Virtualization has many aspects and flavours, but one thing is in common: it is rather heavy weighted to build up a virtualization platform, and using it will cause some performance reduction in comparision to deploying software artifacts directly to physical machines - what was still done for this reason, to have maximum throughput and optimal performance for business. But with virtualization we gain flexibility, beeing able to move a virtualized computing unit on the hardware below, especially from an older system to a newer one without having to rebuild, repackage or deploy anything. And it is already a big, well known industry behind virtualization infrastructure and technology.
So what is new with Docker? First of all, Docker is *very lightweight*. It fits well in modern Unix enviroments as it bases upon kernel features like CGroups, LXC and more to provide a separation of the runtime environment for the application components from the base os system and drivers and hardware below. But docker is not linux only, there is movement also in the non-Linux part of our world implementing docker and docker related services. Important is: Docker is not about VMs, it is containers. Docker as technology and platform promises to become a radical shift in view. But as I am no authority in this domain, I just refer to a recent article on why Docker is [the biggest disruption in Linux virtualization] (http://www.nextplatform.com/2015/11/06/linux-containers-will-disrupt-virtualization-incumbents/).