If "Creating snapshot fail" error appears

In some cases, operations with VMs may end with errors like "Unhandled exception: Error message: Creating snapshot fail. Command exited with message error: unsupported flags (0x200) in function qemuDomainSnapshotCreateXML".

Such errors can occur after an OS or software update of qemu and libvirt on the cluster node. For example, when upgrading from CentOS 8/8.1/8.2 to CentOS 8.3.

The cause of the error is that the OS keeps working with old versions of the qemu and libvirt services. To avoid such errors, restart the libvirt service after the upgrade:

If you have updated the OS on the cluster node, restart the libvirt service:

servicectl restart libvirtd