libvirt-provider

The libvirt-proivder implements the MachineRuntime interface. It interfaces directly with the libvirt daemon running on a hypervisor host to manage virtual machine instances.

In combination with the machinepoollet the libvirt-provider ensures the correct translation of Machines from the IronCore compute resource group into a domain.xml representing the virtual machine on a physical host.

Overview

The relationship beween the machinepoollet and the libvirt-provider is illustrated in the graph below:

Here the machinepoollet announces it's MachinePool and watches Machines scheduled on this pool as described in the Scheduling and Orchestration Section.

The libvirt-provider is then invoked by the machinepoollet via the MachineRuntime interface method the libvirt-provider implements and creates/deletes/modifies virtual machine instances by interacting with the libvirt daemon.