On Sat, Mar 11, 2023 at 06:35:20PM +0100, Michael Schwartzkopff wrote: > Hi, > > > I have an old system. The guest there is defined with: > > <os> > <type arch='x86_64' machine='pc-q35-rhel8.2.0'>hvm</type> > </os> > > > When I try to migrate this guest to a new system I get the error: > > error: internal error: unable to execute QEMU command 'blockdev-add': Failed > to connect socket: Permission denied > > On the new host I see the log entries: > > libvirtd[22411]: Domain id=18 name='test02' > uuid=9bad33a8-d18e-4c68-bdbe-dad34142dc22 is tainted: deprecated-config > (machine type 'pc-q35-rhel8.2.0') > systemd-machined[9980]: New machine qemu-18-test02. > systemd[1]: Started Virtual Machine qemu-18-test02. > systemd-networkd[3914]: vnet20: Link DOWN > systemd-networkd[3914]: vnet20: Lost carrier > kernel: br1: port 3(vnet20) entered disabled state > kernel: device vnet20 left promiscuous mode > kernel: br1: port 3(vnet20) entered disabled state > systemd[1]: machine-qemu\x2d18\x2dtest02.scope: Deactivated successfully. > systemd-machined[9980]: Machine qemu-18-test02 terminated. > libvirtd[22411]: migration successfully aborted > > > It seems there is no possible combination of machine types that is > compatible for both hosts. The old host only can start rhel8.2 guests, the > new one only rhel9.0. RHEL-9 is capable of running all rhel8.x machine types, so there shold be no compatibility problems here. The message you see about deprecation is simply a warning that continuing to use this rhel8.2 machine type is discouraged, because you won't be able to live migrate it onto future RHEL-10 hosts. > Is there a possibility to change the machine type during a migration? Is > such a migration possible? Or do I have so shut down the guest? Changing machine types during live migration is impossible as that's a guest visible hardware change. That shouldn't matter foir your case though, as RHEL-9 is capable fo running rhel8.2 machine types. I'd suggeest checking the /var/log/libvirt/qemu/$GUEST.log file for details of why it might have actually failed. With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
