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Pvpanic device supports bit 1 as crashloaded event, it means that guest actually panicked and run kexec to handle error by guest side. Handle crashloaded as a lifecyle event in libvirt. Test case: Guest side: before testing, we need make sure kdump is enabled, 1, build new pvpanic driver (with commit from upstream e0b9a42735f2672ca2764cfbea6e55a81098d5ba 191941692a3d1b6a9614502b279be062926b70f5) 2, insmod new kmod 3, enable crash_kexec_post_notifiers, # echo 1 > /sys/module/kernel/parameters/crash_kexec_post_notifiers 4, trigger kernel panic # echo 1 > /proc/sys/kernel/sysrq # echo c > /proc/sysrq-trigger Host side: 1, build new qemu with pvpanic patches (with commit from upstream 600d7b47e8f5085919fd1d1157f25950ea8dbc11 7dc58deea79a343ac3adc5cadb97215086054c86) 2, build libvirt with this patch 3, handle lifecycle event and trigger guest side panic # virsh event stretch --event lifecycle event 'lifecycle' for domain stretch: Crashed Crashloaded events received: 1 Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Signed-off-by: zhenwei pi <pizhenwei@bytedance.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, however, we mandate to have the build directory different than the source directory. For example, to build in a manner that is suitable for installing as root, use:
$ mkdir build && cd build
$ ../configure --prefix=/usr --sysconfdir=/etc --localstatedir=/var
$ make
$ sudo make install
While to build & install as an unprivileged user
$ mkdir build && cd build
$ ../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: