On 26/6/18 08:22, Peter Krempa wrote:
On Sun, Jun 24, 2018 at 23:29:13 +0000, procmem wrote:
Hello. I'm interested in running guests as read-only to turn them into a sort of virtualized "live=cd". The goal is to leave no forensic evidence
If you want to be sure that the writes don't touch any image, you need to create a overlay qcow2 image which will catch the writes and dispose it after the VM is turned off.
Shameless plug here, our tool, built on top of libvirt, has been used for this very same purpose. You can create a base, then clone it easily ,do your things, then erase it. You can even create volatile clones, that get removed automatically on shutdown. It does it internally with qcow overlays as Peter advises there. Anyway the underlying disk drive may contain traces of the deleted filesystems. If you want to get rid of those too, you should wipe them somehow. We advertise it as VDI tool but nothing stops you from using it with any kind of OS. https://ravada.upc.edu/