![]() So, whenever you are using these all together, remember there is a hypervisor, an accelerating agent and a management library. Libvirt is quite effective and it can manage a lot of hypervisors altogether. It consists of three utilities namely - an API library, a daemon (libvirtd) and a command line tool -virsh. And what does it do? It manages both KVM and QEMU. Libvirt is quite innocent in the sense that is doesn’t confuse you! It is simply a virtualization management library. So, in short, when they are together, QEMU is the hypervisor/emulator and KVM is the accelerating agent. Regarding access to kvm, since you’re using libvirt, the VMs run as libvirt-qemu and that user is a member of the kvm group. It also adds the acceleration feature to the QEMU process. This daemon runs on virtualization hosts to provide management for QEMU virtual machines. It is one of a collection of modular daemons that replace functionality previously provided by the monolithic libvirtddaemon. KVM helps QEMU to access hardware virtualization features on different architectures. DESCRIPTION The virtqemudprogram is a server side daemon component of the libvirt virtualization management system. So, to achieve that, we have our own very dear KVM. Then why are they used together? Well, because QEMU is dumb! Well, not exactly, but it is a little slower when it comes to system which dont have hardware virtualization. QEMU and KVM both are able to act as hypervisor. He is the guy who creates and runs the guest machine and provide the host’s resource to the guest. ![]() Hypervisor is the agent that helps you create virtual machines. When you dive deep into the virtualization, you find hypervisor.
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