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19. Virtualization

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Virtualization in Fedora 9 includes major changes, and new features, that continue to support the Xen and KVM platforms.

19.1. Kernel Integration Improvements

The Xen kernel is now based on the paravirt ops implementation from the upstream kernel. Previously, the Xen kernel was created by forward-porting Xen bits from the 2.6.18 kernel into the current Fedora kernel. This task was arduous and labor intensive, and resulted in the Xen kernel being several releases behind the bare-metal kernel. The inclusion of paravirt ops now makes this process unnecessary. Once paravirt ops is merged upstream, Xen will no longer require a separate kernel.
However, the Xen kernel now lacks Dom0 support. An existing Xen host/Dom0 must continue to run Fedora 8. Xen Dom0 support will be added back in Fedora 10.
Fully virtualized Linux guests now have 3 possible installation methods:
  • PXE boot from the network.
  • Local CDROM drive / ISO image.
  • Network install from a FTP/HTTP/NFS hosted distribution tree.
The latter allows for fully automated installation through the use of kickstart files. This provides parity between Xen HVM and KVM guests in terms of installation methods.