On Wed, Apr 05, 2023 at 17:37:31 +0200, André Malm wrote:
Den 2023-04-05 kl. 09:47, skrev Peter Krempa:
The backup operation is quite complex so it is possible. Please have a look into /var/log/libvirt/qemu/$VMNAME.log to see whether qemu logged something like an assertion failure before crashing.
Additionally you can have a look into 'coredumpctl' whether there are any recorded crashes of 'qemu-system-x86_64' and also possibly collect the backtrace.
Also make sure to try updating the qemu package and see whether the bug reproduces.
If yes, please collect the stack/back-trace, versions of qemu and libvirt, the contents of the VM log file and also ideally configure libvirt for debug logging and collect the debug log as well:
In the $VMNAME.log: qemu-system-x86_64: ../../block/qcow2.c:5175: qcow2_get_specific_info: Assertion `false' failed.
I'm running libvirt 8.0.0, which is the latest version for my dist (ubuntu 22.04). If required how would I properly upgrade?
Looking at https://github.com/qemu/qemu/blob/0c8022876f2183f93e23a7314862140c94ee62e7/b... which would be the version of qcow2.c for 8.0.0 there seem to be some issue with qcow2 compat.
Huh, that is weird. Both images seem to be qcow2v3 so it's weird that the code reaches the assertion. I think at this point you should report an issue with qemu: https://gitlab.com/qemu-project/qemu/-/issues or report it on the qemu-block@nongnu.org mailing list You'll be asked for what operations lead to the failure so please make sure to collect the libvirt debug log as I've requested. I can help the qemu team to analyze it so make sure to mention me (or my gitlab handle 'pipo.sk') on the issue.