Types

Hardware Virtualization

Hardware Virtualization decouples the OS from the physical hardware with an abstraction layer (Hypervisor), mimicking real hardware to the OS.

Adapted from https://en.wikipedia.org/wiki/File:Hyperviseur.svg

Type 1 Hypervisor: Acts as (host) OS.

Type 2 Hypervisor: Runs as application in a (host) OS.

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Operating-System-Level Virtualization

Hardware Virtualization creates a new OS on top of an existing kernel, allowing for fast and flexible isoltation.

• Virtualizes from the kernel upwards using Namespaces and Cgroups.

• Allows for fast, isolated, portable guest OS “containers”.