Linux virtualisation
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Contents
Why use virtualisation
- Consolidation means combining multiple software workloads on one computer system. You can run various virtual machines in order to save money and power (electricity).
- Testing configurations of new linux distros by creating less resource hungry and low priority virtual machines (VM).
- Learning new operating systems and programming languages/database without having to make changes to the base working environment.
- Supposedly, if a mail server or any other app gets hacked, only that VM will be under control of the adversary.
- Misbehaving apps (e.g. memory leaks) cannot easily bring down the whole server.
Platform virtualisation
kvm
Kernel-based Virtual Machine (KVM) is a Linux kernel virtualization infrastructure. KVM currently supports native virtualization using Intel VT or AMD-V. A wide variety of guest operating systems work with KVM, including many flavours of Linux, BSD, Solaris, and Windows etc. KVM is included with Debian, OpenSuse and other Linux distributions.