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3855f9fbd4
The patch that added the nftables backend for virtual networks left iptables as the default backend when both nftables and iptables are installed. The only functional difference between the two backends is that the nftables backend doesn't add any rules to fix up the checksum of DHCP packets, which will cause failures on guests with very old OSes (e.g. RHEL5) that have a virtio-net network interface using vhost packet processing (the default), connected to a libvirt virtual network, and configured to acquire the interface IP using DHCP. Since RHEL5 has been out of support for several years already, we might as well start off nftables support right by making it the default. Distros that aren't quite ready to default to nftables (e.g. maybe they're rebasing libvirt within a release and don't want to surprise anyone with an automatic switch from iptables to nftables) can simply run meson with "-Dfirewall_backend=iptables" during their official package build. In the extremely unlikely case that this causes a problem for a user, they can work around the failure by adding "<driver name='qemu'/> to the guest <interface> element. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> |
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.. image:: https://gitlab.com/libvirt/libvirt/badges/master/pipeline.svg
:target: https://gitlab.com/libvirt/libvirt/pipelines
:alt: GitLab CI Build Status
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:alt: Translation status
==============================
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:
https://libvirt.org
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 2.0 (or later). See the files ``COPYING.LESSER``
and ``COPYING`` for full license terms & conditions.
Installation
============
Instructions on building and installing libvirt can be found on the website:
https://libvirt.org/compiling.html
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:
* users@lists.libvirt.org (**for user discussions**)
* devel@lists.libvirt.org (**for development only**)
Further details on contacting the project are available on the website:
https://libvirt.org/contact.html