By, Federico Simoncelli, Principal Software Engineer, Red Hat
As a software engineer working on the Red Hat Enterprise Virtualization (RHEV), my team and I are driven by innovation; we are always looking for cutting edge technologies to integrate into our product.
Lately there has been a growing interest in Linux containers solutions such as Docker. Docker provides an open and standardized platform for developers and sysadmins to build, ship, and run distributed applications. The application images can be safely held in your organization registry or they can be shared publicly in the docker hub portal (http://registry.hub.docker.com) for everyone to use and to contribute to.
Linux containers are a well-known technology that runs isolated Linux systems on the same host sharing the same kernel and resources as cpu time and memory. Containers are more lightweight, perform better and allow more density of instances compared to full virtualization where virtual machines run dedicated full kernels and operating systems on top of virtualized hardware. On the other hand virtual machines are still the preferred solution when it comes to running highly isolated workloads or different operating systems than the host.