Peter Krempa <pkrempa@xxxxxxxxxx> writes: > On Thu, Jul 09, 2020 at 17:54:23 +0200, Milan Zamazal wrote: >> Peter Krempa <pkrempa@xxxxxxxxxx> writes: >> > >> > On Thu, Jul 09, 2020 at 14:14:32 +0200, Milan Zamazal wrote: >> >> Milan Zamazal <mzamazal@xxxxxxxxxx> writes: >> >> >> > >> >> > Hi, >> >> > >> >> > I would like to clarify how to make snapshots of running VMs with >> >> > emulated TPM devices. As far as I understand QEMU documentation, it's >> >> > possible to make snapshots of running VMs with TPM, but it's important >> >> > to retain the state of swtpm. Does libvirt assist with that in any way >> >> > or is it completely user's responsibility? libvirt pauses the VM >> >> > internally when making a snapshot, which should be the right moment to >> >> > copy the swtpm data, but the user doesn't have control over it. Is >> >> > there a way to make a copy of swtpm data that is guaranteed to be >> >> > consistent with the snapshot? >> >> >> >> No idea? >> > >> > I can comment only on the fact that libvirt doesn't do anything >> > regarding snapshots on a VM with TPM. >> >> Thank you for the confirmation. >> >> Can anybody confirm there is no way to perform custom actions while a VM >> is frozen by libvirt when making a memory snapshot, before we start >> thinking about workarounds and/or filing a RFE? > > No, currently we don't support any custom actions at the point when the > external memory snapshot is finalized prior to continuing the VM. > > Please file a generic RFE for snapshoting including TPM rather than a > partial one where you'll request a way to do your hack. OK, thanks, done: https://bugzilla.redhat.com/1855367
