Welcome to CernVM Virtual Machine documentation!¶
What is the CernVM Virtual Machine?¶
CernVM is a virtual machine image based on CentOS combined with a custom, virtualization-friendly Linux kernel.
CernVM is based on the µCernVM bootloader. 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.
- Release Notes
- How to run on…
- CernVM Launch
- Micro-CernVM Bootloader
- CernVM Image Signatures