Description of problem: $ virt-builder -x fedora-21 [ 9.0] Downloading: http://libguestfs.org/download/builder/fedora-21.xz [ 10.0] Planning how to build this image [ 10.0] Uncompressing [ 21.0] Opening the new disk [ 80.0] Setting a random seed [ 80.0] Setting passwords virt-builder: Setting random password of root to 9jgDhKIcf6X42Qke [ 81.0] Finishing off Output file: /tmp/test-fedora-21.img Output size: 4.0G Output format: raw Total usable space: 5.2G Free space: 4.5G (86%) No trace output! Version-Release number of selected component (if applicable): virt-builder 1.29.25
Patch posted: https://www.redhat.com/archives/libguestfs/2015-February/msg00195.html
Fixed with https://github.com/libguestfs/libguestfs/commit/be79bdfd3acb25018feb2a808aa1343c2cc8b95c which is in libguestfs >= 1.29.27.