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Libvirt provides a portable, long term stable C API for managing the
virtualization technologies provided by many operating systems. It
includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware
vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER
Hypervisor.
30bb4c4b54
This resolves https://bugzilla.redhat.com/show_bug.cgi?id=1008903 The Q35 machinetype has an implicit SATA controller at 00:1F.2 which isn't given the "expected" id of ahci0 by qemu when it's created. The original suggested solution to this problem was to not specify any controller for the disks that use the default controller and just specify "unit=n" instead; qemu should then use the first IDE or SATA controller for the disk. Unfortunately, this "solution" is ignorant of the fact that in the case of SATA disks, the "unit" attribute in the disk XML is actually *not* being used for the unit, but is instead used to specify the "bus" number; each SATA controller has 6 buses, and each bus only allows a single unit. This makes it nonsensical to specify unit='n' where n is anything other than 0. It also means that the only way to connect more than a single device to the implicit SATA controller is to explicitly give the bus names, which happen to be "ide.$n", where $n can be replaced by the disk's "unit" number. |
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LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>