On Thu, Apr 30, 2020 at 2:15 PM Daniel P. Berrangé <berrange@xxxxxxxxxx> wrote: > > On Thu, Apr 30, 2020 at 01:52:12PM +0200, Miguel Duarte de Mora Barroso wrote: > > Hi, > > > > I'm seeing the following issue when attempting to update the guest's > > clock on a running fc32 guest (using guest agent): > > > > ``` > > [root@virt-launcher-vmi-masquerade-mh2xm /]# virsh domtime 1 --pretty > > Time: 2020-04-30 23:27:29 > > [root@virt-launcher-vmi-masquerade-mh2xm /]# virsh domtime 1 --sync > > error: internal error: unable to execute QEMU agent command > > 'guest-set-time': hwclock failed to set hardware clock to system time > > This error is ultimately coming from the QEMU guest agent inside > your guest. It spawns "hwclock" and this is failing for some reason. > You'll probably need to debug this inside the guest - strace the > QEMU guest agent, see where it fails, and then file a bug against > the distro for it. Eventually I found out that if I make the call *without* specifying the `libvirt.DOMAIN_TIME_SYNC` flag this works as I intend. I've read the docs and could not understand what's the purpose of this flag . It reads "Re-sync domain time from domain's RTC" on [0]. It begs the question: if I'm setting it to a fixed instant in time (which I am), why would I want it to sync with the domain's RTC ? Is there any obvious issue that will appear from calling `virDomainSetTime` (defined at [1]) without the DOMAIN_TIME_SYNC flag specified ? I'm not sure if this (removing the DOMAIN_TIME_SYNC) is a fix, an ugly hack, or a disaster waiting to happen. > > > # now, this one works. > > [root@virt-launcher-vmi-masquerade-mh2xm /]# virsh domtime 1 --now > > > > [root@virt-launcher-vmi-masquerade-44v2x /]# virsh domtime 1 --pretty > > Time: 2020-04-30 11:15:45 > > This doesn't run hwclock as its merely reading the current time,. > > > Is there any workaround I could try ? Am I doing something wrong here ? > > I don't think you're doing anything wrong. This just looks like a guest > OS bug to me. Thanks for the prompt reply! [0] - https://github.com/libvirt/libvirt/blob/bef10f6eaa93db649c36468143ce6556444a2e25/include/libvirt/libvirt-domain.h#L4712 [1] - https://github.com/libvirt/libvirt/blob/master/src/libvirt-domain.c#L11292 > > 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 :| >
