1a4df34a0f
Add a new file checkpoint_conf.c that performs the translation to and from new XML describing a checkpoint. The code shares a common base class with snapshots, since a checkpoint similarly represents the domain state at a moment in time. Add some basic testing of round trip XML handling through the new code. Of note - this code intentionally differs from snapshots in that XML schema validation is unconditional, rather than based on a public API flag. We have many existing interfaces that still need to add a flag for opt-in schema validation, but those interfaces have existing clients that may not have been producing strictly-compliant XML, or we may still uncover bugs where our RNG grammar is inconsistent with our code (where omitting the opt-in flag allows existing apps to keep working while waiting for an RNG patch). But since checkpoints are brand-new, it's easier to ensure the code matches the schema by always using the schema. If needed, a later patch could extend the API and add a flag to turn on to request schema validation, rather than having it forced (possibly just the validation of the <domain> sub-element during REDEFINE) - but if a user encounters XML that looks like it should be good but fails to validate with our RNG schema, they would either have to upgrade to a new libvirt that adds the new flag, or upgrade to a new libvirt that fixes the RNG schema, which implies adding such a flag won't help much. Also, the redefine flag requires the <domain> sub-element to be present, rather than catering to historical back-compat to older versions. Signed-off-by: Eric Blake <eblake@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 2.0 (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: