fc79e73836
The network driver used to reload the firewall rules whenever a dbus NameOwnerChanged message for org.fedoraproject.FirewallD1 was received. Presumably at some point in the past this was successful at reloading our rules after a firewalld restart. Recently though I noticed that once firewalld was restarted, libvirt's logs would get this message: The name org.fedoraproject.FirewallD1 was not provided by any .service files After this point, no networks could be started until libvirtd itself was restarted. The problem is that the NameOwnerChanged message is sent twice during a firewalld restart - once when the old firewalld is stopped, and again when the new firewalld is started. If we try to reload at the point the old firewalld is stopped, none of the firewalld dbus calls will succeed. The solution is to check the new_owner field of the message - we should reload our firewall rules only if new_owner is non-empty (it is set to "" when firewalld is stopped, and some sort of epoch number when it is again started). Signed-off-by: Laine Stump <laine@laine.org> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Libvirt API for virtualization
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.
For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the website:
License
The libvirt C API is distributed under the terms of GNU Lesser General
Public License, version 2.1 (or later). Some parts of the code that are
not part of the C library may have the more restrictive GNU General
Public License, version 2.1 (or later). See the files COPYING.LESSER
and COPYING for full license terms & conditions.
Installation
Libvirt uses the GNU Autotools build system, so in general can be built and installed with the usual commands. For example, to build in a manner that is suitable for installing as root, use:
$ ./configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var
$ make
$ sudo make install
While to build & install as an unprivileged user
$ ./configure --prefix=$HOME/usr
$ make
$ make install
The libvirt code relies on a large number of 3rd party libraries. These will
be detected during execution of the configure script and a summary printed
which lists any missing (optional) dependencies.
Contributing
The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
The libvirt project has two primary mailing lists:
- libvirt-users@redhat.com (for user discussions)
- libvir-list@redhat.com (for development only)
Further details on contacting the project are available on the website: