On Fri, Oct 07, 2022 at 10:28:07AM +0100, Daniel P. Berrangé wrote: > On Fri, Oct 07, 2022 at 10:21:18AM +0100, Richard W.M. Jones wrote: > > On Thu, Oct 06, 2022 at 07:14:39PM +0000, woodcab wrote: > > > Hello, > > > > > > Still new to Linux and had a few questions regarding upgrading to 4.1.0 > > > > > > I'm using virt-manager 2.2.1 on Ubuntu MATE 20.4. There is an > > > upgrade available for Ubuntu Mate to MATE 20.4.1. I am told that > > > this is a minor upgrade and that it can be done with my files in > > > place. I have backed up my files and VMs along with the .xml > > > files. My question is how to best proceed with that upgrade? If > > > virt-manager is upgraded to 4.1.0 in the process, will my VMs that > > > were setup in 2.2.1 still work in 4.1.0? Or should I upgrade > > > virt-manager to an intermediate version before going to 4.1.0? > > > > I don't think I've ever had to worry about existing VMs when upgrading > > libvirt or virt-manager (BTW I think *libvirt* is more relevant to > > this since that's what is actually managing the VMs). I have upgraded > > libvirt many times on my system that runs VMs even while the VMs were > > running. > > Libvirt goes to quite alot of trouble to ensure you can upgrade > the host software stack and not cause problems to your VMs. You > can even upgrade libvirt itself, while QEMU VMs are running, > and it should seemlessly reconnect. > > Upgrading virt-manger itself will not have any impact of VMs, > since virt-manager is merely a GUI frontend. > > Downgrading software, however, is totally unsupported, and you > get to keep any pieces & put it back together if it breaks :-) > > > Since you've done the right thing by backing up the existing VMs and > > *.xml files, you should be good even in the unlikely case that > > anything goes wrong during the upgrade, so I guess go for it! I'll add that going from 20.04 to 20.04.1 is unlikely to bring in a significantly different version of any package, so you can basically ignore compatibility concerns in your scenario :) -- Andrea Bolognani / Red Hat / Virtualization
