On Saturday, June 21, 2014 5:37 PM, Gene Czarcinski <gczarcinski@xxxxxxxxx> wrote: > >I was under the impression that the value of /etc/machine-id was unqiue >for every OS installation on a system. This seems to be the case on >real hardware. That is, if I install Fedora 19, Fedora 20, and >Fedora-rawhide on a system, they will each have a different value for >/etc/machine-id. > >This does not seem to be the case for qemy-kvm-libvirt virtual systems. >SOmetimes they are different but I just noticed that a virtual system >with both Fedora 20 and Fedora rawhide installed (btrfs partitioning), >the two installations have the same value in /etc/machine-id. The two >installs have different ext4 partitions for /boot, different subvols for >the respective rootfs and the same/shared subvol for /home. Maybe this snippet from the systemd-machine-id-setup(1) man page [1] explains it: > If run inside a KVM virtual machine and a UUID is passed via the -uuid > option, this UUID is used to initialize the machine ID instead of a > randomly generated one. The caller must ensure that the UUID passed is > sufficiently unique and is different for every booted instanced of the > VM. Cheers, Cristian Ciupitu [1]: http://www.freedesktop.org/software/systemd/man/systemd-machine-id-setup.html _______________________________________________ libvirt-users mailing list libvirt-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvirt-users
