Create Virtual Machine in Containerized Libvirt

[abhibongale]

Create a virtual machine using libvirt/KVM inside the containerized libvirt service that will act as a baremetal node for Ironic to manage. This VM will be controlled by Ironic through the Redfish BMC emulator (sushy-tools).

The VM needs to be configured to boot from network (PXE) and have characteristics similar to a real baremetal server.

Fully Containerized: VMs run inside the stackbox-libvirt container (Metal3 style), ensuring zero impact on host libvirt configuration.

Benefits of Containerized Approach

• ✅ Zero host impact: No changes to host libvirt
• ✅ Portable: Same setup on any machine with Docker
• ✅ Clean removal: docker-compose down removes everything
• ✅ Matches CI: Identical to Metal3/upstream CI setup
• ✅ Isolated: Multiple StackBox instances won't conflict
• ✅ No permissions: No need for user in libvirt group

Goals

• Create libvirt VM programmatically
• Configure VM for PXE boot
• Set appropriate hardware specs (memory, CPU, disk)
• Make VM accessible to Ironic
• Store VM definition persistently

Tasks

• Create stackbox/core/vm.py for VM management
• Define VM XML template
• Implement VM creation function
• Configure PXE boot order
• Set up virtual disk
• Configure network interface
• Integrate VM creation with init command
• Handle libvirt connection
• Test VM can be created and started
• Document VM configuration

Acceptance Criteria

• VM is created successfully
• VM has correct specs (2 vCPUs, 4GB RAM, 20GB disk)
• VM boots from network first
• VM is visible to libvirt
• VM can be started and stopped
• VM XML is saved for persistence
• VM network is properly configured
• Multiple VMs can be created