Alice Frosi
2023-Sep-25 14:26 UTC
[Libguestfs] [PATCH v2v 0/5] convert: Find out if Windows guest is expecting BIOS localtime or UTC
Hi Rich, On Mon, Sep 25, 2023 at 4:10?PM Richard W.M. Jones <rjones at redhat.com> wrote:> [Alice: See patch 2] >I'm not 100% sure about the source of this work. However, we had in KubeVirt people interested in using localtime with Windows [1]. Yes, I see that you pointed to that PR in patch 2. The problem with that PR is the migration. What happens if we migrate the VM to a host that is in another timezone? Is it going to break the application running inside the VM? IMO, that was the major blocker of that PR. I initially suggested that we either avoid migration as a first step or try to migrate only on nodes at the same timezone, Do you know if anyone has experience on this particular problem? [1] github.com/kubevirt/kubevirt/pull/9587 Many thanks, Alice -------------- next part -------------- An HTML attachment was scrubbed... URL: <listman.redhat.com/archives/libguestfs/attachments/20230925/c4fe1963/attachment.htm>
Daniel P. Berrangé
2023-Sep-25 15:19 UTC
[Libguestfs] [PATCH v2v 0/5] convert: Find out if Windows guest is expecting BIOS localtime or UTC
On Mon, Sep 25, 2023 at 04:26:59PM +0200, Alice Frosi wrote:> Hi Rich, > > On Mon, Sep 25, 2023 at 4:10?PM Richard W.M. Jones <rjones at redhat.com> > wrote: > > > [Alice: See patch 2] > > > > I'm not 100% sure about the source of this work. However, we had in > KubeVirt people interested in using localtime with Windows [1]. Yes, I see > that you pointed to that PR in patch 2. The problem with that PR is the > migration. What happens if we migrate the VM to a host that is in another > timezone? Is it going to break the application running inside the VM?I would generally expect all hosts to be configured in the same timezone, for any given single cloud deployment. If you really are concerned about this problem though, libvirt lets you set this explicitly eg <clock offset='localtime' timezone='Europe/London'/> With regards, Daniel -- |: berrange.com -o- flickr.com/photos/dberrange :| |: libvirt.org -o- fstop138.berrange.com :| |: entangle-photo.org -o- instagram.com/dberrange :|