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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.
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Jiri Denemark 2e164b451e qemu: Ignore graphics cookie if port == 0 
Old libvirt represents

    <graphics type='spice'>
      <listen type='none'/>
    </graphics>

as

    <graphics type='spice' autoport='no'/>

In this mode, QEMU doesn't listen for SPICE connection anywhere and
clients have to use virDomainOpenGraphics* APIs to attach to the domain.
That is, the client has to run on the same host where the domains runs
and it's impossible to tell the client to reconnect to the destination
QEMU during migration (unless there is some kind of proxy on the host).

While current libvirt correctly ignores such graphics devices when
creating graphics migration cookie, old libvirt just sends

    <graphics type='spice' port='0' listen='0.0.0.0' tlsPort='-1'/>

in the cookie. After seeing this cookie, we happily would call
client_migrate_info QMP command and wait for SPICE_MIGRATE_COMPLETED
event, which is quite pointless since the doesn't know where to connecti
anyway. We should just ignore such cookies.

https://bugzilla.redhat.com/show_bug.cgi?id=1376083

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2016-09-21 14:11:26 +02:00
.gnulib@e89b4a7aef build: update to latest gnulib 2016-09-19 10:15:05 -05:00
build-aux prohibit-duplicate-header: print file name and line 2016-06-23 12:48:40 +02:00
daemon stream.c: fix a typo 2016-09-21 14:02:43 +02:00
docs docs: expand docs on user x509 cert locations 2016-09-19 11:02:26 +01:00
examples Introduce node device update event as top level event 2016-08-15 08:30:56 -04:00
gnulib build: drop hack for old mingw ssize_t 2016-07-12 08:57:13 -06:00
include/libvirt Add missing 'extern' for VIR_EXPORT_VAR macro 2016-09-20 12:55:28 +01:00
m4 virt-wireshark: Properly substract wireshark prefix 2016-07-27 17:01:18 +02:00
po Release of libvirt-2.2.0 2016-09-02 15:28:51 +02:00
src qemu: Ignore graphics cookie if port == 0 2016-09-21 14:11:26 +02:00
tests qemu: Reorder shmem params nicely 2016-09-20 15:42:43 +02:00
tools virt-admin: Add some command aliases to provide syntax sugar over ugly commands 2016-09-20 15:17:46 +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 tests: Self test virt-admin 2016-09-14 13:18:07 +02:00
.gitmodules make .gnulib a submodule 2009-07-08 16:17:51 +02:00
.mailmap maint: update .mailmap for recent contributions 2015-03-20 06:17:55 -06:00
AUTHORS.in Change maintainers list 2016-02-12 13:10:05 +03:00
autobuild.sh maint: Switch to xz compressed PAX release archives 2016-06-15 18:53:34 +02:00
autogen.sh maint: improve usage of autogen's --no-git 2015-02-06 11:35:29 -07:00
bootstrap maint: update to latest gnulib 2016-05-26 10:47:03 -06:00
bootstrap.conf hvsupport: use a regex instead of XML::XPath 2016-07-19 18:42:44 +02:00
cfg.mk cfg.mk: join not_streq and not_strneq tests 2016-08-18 13:37:08 +02:00
ChangeLog-old Fix typos in src/* 2014-04-21 16:49:08 -06:00
config-post.h config-post.h:fix a typo 2016-09-21 09:35:51 +02:00
configure.ac Revert "configure: Check for major() more strictly" 2016-09-19 10:15:09 -05:00
COPYING maint: follow recommended practice for using LGPL 2013-05-20 14:15:21 -06:00
COPYING.LESSER maint: Remove control characters from LGPL license file 2015-09-25 09:16:24 +02:00
HACKING docs: remove outdated suggestion to make patches with "diff -urp"/"git diff" 2016-07-01 12:41:10 -04:00
libvirt-admin.pc.in Add libvirt-admin library 2015-06-16 13:46:20 +02:00
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 rpm: set TLS priority to @LIBVIRT,SYSTEM on Fedora >= 25 2016-08-04 15:59:24 +01:00
Makefile.am dist: Speed up distribution compression 2016-06-30 16:05:24 +02:00
Makefile.nonreentrant cfg.mk: use a single regex for all non-reentrant functions 2016-06-15 15:00:56 +02:00
mingw-libvirt.spec.in mingw-libvirt.spec.in: add perl + perl(Getopt::Long) BRs 2016-07-01 14:11:15 +01:00
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

README 

         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>