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.
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Lubomir Rintel afe8f4200f qemu: x86_64 is good enough for i686
virt-manager on Fedora sets up i686 hosts with "/usr/bin/qemu-kvm" emulator,
which in turn unconditionally execs qemu-system-x86_64 querying capabilities
then fails:

Error launching details: invalid argument: architecture from emulator 'x86_64' doesn't match given architecture 'i686'

Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 748, in _show_vm_helper
    details = self._get_details_dialog(uri, vm.get_connkey())
  File "/usr/share/virt-manager/virtManager/engine.py", line 726, in _get_details_dialog
    obj = vmmDetails(conn.get_vm(connkey))
  File "/usr/share/virt-manager/virtManager/details.py", line 399, in __init__
    self.init_details()
  File "/usr/share/virt-manager/virtManager/details.py", line 784, in init_details
    domcaps = self.vm.get_domain_capabilities()
  File "/usr/share/virt-manager/virtManager/domain.py", line 518, in get_domain_capabilities
    self.get_xmlobj().os.machine, self.get_xmlobj().type)
  File "/usr/lib/python2.7/site-packages/libvirt.py", line 3492, in getDomainCapabilities
    if ret is None: raise libvirtError ('virConnectGetDomainCapabilities() failed', conn=self)
libvirtError: invalid argument: architecture from emulator 'x86_64' doesn't match given architecture 'i686'

Journal:

Oct 16 21:08:26 goatlord.localdomain libvirtd[1530]: invalid argument: architecture from emulator 'x86_64' doesn't match given architecture 'i686'
2014-10-21 13:36:25 +02:00
.gnulib@9565c3be73 maint: update to latest gnulib 2014-09-06 19:14:43 -06:00
build-aux maint: improve syntax check for space around = 2014-08-12 11:21:17 -06:00
daemon tunable_event: extend debug message and tweak limit for remote message 2014-09-25 10:56:04 +02:00
docs docs: apps: Update references to virt-p2v and virt-v2v. 2014-10-20 08:56:19 +01:00
examples event_example: cleanup example code for tunable event 2014-09-26 09:33:58 +02:00
gnulib maint: update to latest gnulib 2014-01-01 06:02:47 -07:00
include qemu: support nospace reason in io error event 2014-10-03 12:43:53 -06:00
m4 build: prefer -fstack-protector-strong to -all 2014-06-12 08:16:03 +02:00
po esx: Add libcurl based stream driver 2014-10-07 22:05:49 +02:00
src qemu: x86_64 is good enough for i686 2014-10-21 13:36:25 +02:00
tests tests: fix incorrect caps for shmem-invalid-size, shmem-small-size 2014-10-20 09:01:27 +02:00
tools virsh: domain: Use global constant for XML file size limit 2014-10-14 10:04:31 +02:00
.ctags maint: Make ctags work out of the box 2013-07-18 08:47:21 +02:00
.dir-locals.el build: avoid tabs that failed syntax-check 2012-09-06 09:43:46 -06:00
.gitignore daemon: use socket activation with systemd 2014-08-22 09:12:14 +02:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap maint: update .mailmap 2014-10-06 08:23:47 -06:00
AUTHORS.in Cleanup maintainers list 2014-10-15 10:16:47 +02:00
autobuild.sh Disable libvirtd by default when building on Win32 2014-04-29 11:30:32 +01:00
autogen.sh maint: detect VPATH builds when checking for gnulib update 2014-06-04 16:06:55 -06:00
bootstrap maint: update to latest gnulib 2014-01-01 06:02:47 -07:00
bootstrap.conf Add helpers for getting env vars in a setuid environment 2013-10-21 14:03:52 +01:00
cfg.mk maint: Prohibit "devname" by a syntax check rules 2014-10-01 16:39:01 +02:00
ChangeLog-old Fix typos in src/* 2014-04-21 16:49:08 -06:00
config-post.h build: fix build of virt-login-shell on systems with older gnutls 2013-10-22 09:41:50 -06:00
configure.ac configure: improve misleading libnl3-devel missing error message 2014-10-03 16:08:44 +02:00
COPYING maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
COPYING.LESSER maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
HACKING maint: tighten curly brace syntax checking 2014-09-04 15:38:00 -06:00
libvirt-lxc.pc.in Add pkg-config files for libvirt-qemu & libvirt-lxc 2014-06-23 16:17:27 +01:00
libvirt-qemu.pc.in Add pkg-config files for libvirt-qemu & libvirt-lxc 2014-06-23 16:17:27 +01:00
libvirt.pc.in Add pkg-config files for libvirt-qemu & libvirt-lxc 2014-06-23 16:17:27 +01:00
libvirt.spec.in Release of libvirt-1.2.9 2014-10-01 16:45:32 +08:00
Makefile.am examples: Introduce domtop 2014-07-18 16:39:54 +02:00
Makefile.nonreentrant maint: use LGPL correctly 2013-05-20 14:03:48 -06:00
mingw-libvirt.spec.in build: package .pc files for mingw64 2014-07-09 16:45:15 -06:00
README Correct typos in the documentation (Atsushi SAKAI) 2008-01-24 10:15:13 +00:00
README-hacking docs: update README-hacking 2014-05-06 16:20:24 -06:00
run.in Add PKG_CONFIG_PATH to run.in script. 2014-06-26 14:32:35 +01:00
TODO Update todo list file to point at bugzilla/website 2010-10-13 16:45:26 +01:00

         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>