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libvirt is an open-source API, daemon and management tool for managing platform virtualization. [3] It can be used to manage KVM , Xen , VMware ESXi , QEMU and other virtualization technologies. These APIs are widely used in the orchestration layer of hypervisors in the development of a cloud-based solution.
KVM requires a processor with hardware virtualization extensions, such as Intel VT or AMD-V. [2] KVM has also been ported to other operating systems such as FreeBSD [3] and illumos [4] in the form of loadable kernel modules. KVM was originally designed for x86 processors but has since been ported to ESA/390, [5] PowerPC, [6] IA-64, and ARM.
Two types of virtualization are supported: container-based with LXC (starting from version 4.0 replacing OpenVZ used in version up to 3.4, included [10]), and full virtualization with KVM. [11] It includes a web-based management interface. [12] [13] There is also a mobile application available for controlling PVE environments. [14]
Virt-manager allows users to: create, edit, start and stop VMs; view and control each VM's console; see performance and utilization statistics for each VM
In computer networking, TUN and TAP are kernel virtual network devices. Being network devices supported entirely in software, they differ from ordinary network devices which are backed by physical network adapters. The Universal TUN/TAP Driver originated in 2000 as a merger of the corresponding drivers in Solaris, Linux and BSD. [1]
These included the test software SIMMON and the CP/CMS operating system, the predecessor of IBM's VM family of virtual machine operating systems. Examples of Type-1 hypervisor include Hyper-V, Xen and VMware ESXi. Type-2 or hosted hypervisors These hypervisors run on a conventional operating system (OS) just as other computer programs do.
The guest operating systems do not need to be compliant with the host hardware, thereby making it possible to run different operating systems on the same computer (e.g., Microsoft Windows, Linux, or previous versions of an operating system) to support future software.
The guest operating systems do not need to be compliant with the host hardware, thus making it possible to run different operating systems on the same computer (e.g., Windows, Linux, or prior versions of an operating system) to support future software. [3]