CernVM

"CernVM 3 is a virtual machine image based on Scientific Linux 6 combined with a custom, virtualization-friendly Linux kernel.

CernVM 3 is based on the µCernVM bootloader (link is external). Its outstanding feature is that it does not require a hard disk image to be distributed (hence “micro”). Instead it is distributed as a read-only image of ~20MB containing a Linux kernel and the CernVM-FS client. The rest of the operating system is downloaded and cached on demand by CernVM-FS. The virtual machine still requires a hard disk as a persistent cache, but this hard disk is initially empty and can be created instantaneously, instead of being pre-created and distributed.

CernVM 3 comes with a C++11 compiler, a Go compiler, an Erlang interpreter, GNUplot, ROOT, R, octave, LaTeX, scipy and numpy, and many other useful packages. For distributed computing, CernVM 3 comes with tools such as Condor, Ganglia, Squid, XrootD, Puppet, Parrot and Workqueue/Makeflow, and others. In order to manage your virtual machines in the cloud, CernVM 3 comes with the cloud management utilities for OpenStack (nova, glance), Amazon EC2 (ec2-… and euca-…), Google Compute Engine (gcutil, gsutil, gcloud), and Microsoft Azure (azure)."

https://cernvm.cern.ch/portal/release_3.6.2

https://cernvm.cern.ch/

Status and Roadmap of CernVM - http://iopscience.iop.org/article/10.1088/1742-6596/664/2/022018