Hello, I expect this pops up every couple of months and apologise if indeed it does. But I couldn't find a discussion specific to virt-manager and so it goes: When working with snapshots, guests will have outdated date and time upon resume. Although the (virtual) hardware clock seems to get updated upon resume, it can take quite a long time until the guest OS resyncs its current time from either that or via NTP. I've seen workarounds employing hwclock --hctosys in once-a-minute cron jobs or very aggressive NTP client configs. Now I have come across an agent based solution in Nova[1] and ported it PoC-style to virt-manager. It works very well for me. Would this be something that could be considered for inclusion? Or is there another mechanism that should already take care of this and just doesn't work in my case? [1] https://github.com/openstack/nova/commit/414df1e56ea9df700756a1732125e06c5d97d792. PoC code: --- virt-manager/virtManager/object/domain.py.orig 2019-10-31 17:35:04.829950245 +0100 +++ virt-manager/virtManager/object/domain.py 2019-10-31 18:19:39.834899951 +0100 @@ -1276,7 +1276,28 @@ @vmmLibvirtObject.lifecycle_action def startup(self): + sync_time = self.has_managed_save() self._backend.create() + if sync_time: + dry = 1 + while dry < 5: + t = time.time() + seconds = int(t) + nseconds = int((t - seconds) * 10 ** 9) + try: + self._backend.setTime(time = {'seconds': seconds, 'nseconds': nseconds}) + except libvirt.libvirtError as e: + code = e.get_error_code() + if code == libvirt.VIR_ERR_AGENT_UNRESPONSIVE: + log.debug('Failed to set time: QEMU agent unresponsive') + elif code == libvirt.VIR_ERR_NO_SUPPORT: + log.debug('Failed to set time: not supported') + elif code == libvirt.VIR_ERR_ARGUMENT_UNSUPPORTED: + log.debug('Failed to set time: agent not configured') + else: + log.warning('Failed to set time: %s', e) + + dry += 1 @vmmLibvirtObject.lifecycle_action def suspend(self): -- Thanks, Michael _______________________________________________ virt-tools-list mailing list virt-tools-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/virt-tools-list
