SLC6: qemu-kvm PXE booting workaround

Workaround for SLC6 qemu-kvm network (PXE) booting

After February 2016 update of CERN Network Installation System (AIMS2), qemu-kvm on SLC6 is not able to boot from the network properly anymore.

As a workaround until a permanent solution is found please use following precedure.

• Download gpxe-1.0.1-gpxe.iso.
• In Virtual Machine Manager (virt-manager) reconfigure virtual system:
  • Add a Storage - CDROM device type.
  • Mount downloaded gpxe-1.0.1 iso image.
  • Adjust Boot Options enabling boot from CDROM and disabling Network (PXE).
  • Change Network Adapter (NIC) model to e1000.
• Boot the virtual system from CDROM. (it will issue a PXE request)
• At the 'Welcome to network installation system' screen.
  • Linux installation: proceed to standard installation.
  • Windows installation:
    • Choose 'Expert Operating System Install Menu' submenu.
    • Choose 'CERN (NICE) Windows Install Menu'.
    • Choose 'Install a Windows 64-bit / 32-bit OLD image'.