Hi,

1. What are you trying to do?
I was trying to clean up a virtual machine image in place. I followed the instruction in the Openstack documentation to do so. Here is the link: http://docs.openstack.org/image-guide/ubuntu-image.html

2. What exact command(s) did you run?
virt-sysprep -d trusty

3. What was the precise error or output of these commands?
Examining the guest ...
Fatal error: exception Guestfs.Error("/usr/bin/supermin-helper exited with error status 1.
To see full error messages you may need to enable debugging.
See http://libguestfs.org/guestfs-faq.1.html#debugging-libguestfs")

4.Enable debugging, run the commands again, and capture the complete output. Do not edit the output.
Examining the guest ...
libguestfs: trace: set_verbose true
libguestfs: trace: set_verbose = 0
libguestfs: create: flags = 0, handle = 0x1d9fcc0, program = virt-sysprep
libguestfs: trace: add_domain "ryu" "readonly:false" "allowuuid:true" "readonlydisk:ignore"
libguestfs: opening libvirt handle: URI = NULL, auth = virConnectAuthPtrDefault, flags = 1
libguestfs: successfully opened libvirt handle: conn = 0x1da04a0
libguestfs: trace: internal_set_libvirt_selinux_norelabel_disks false
libguestfs: trace: internal_set_libvirt_selinux_norelabel_disks = 0
libguestfs: disk[0]: filename: /home/sajad/Desktop/ubuntu-with-ryu-image/ryu.qcow2
libguestfs: trace: add_drive "/home/sajad/Desktop/ubuntu-with-ryu-image/ryu.qcow2" "readonly:false" "format:qcow2"
libguestfs: trace: add_drive = 0
libguestfs: trace: add_domain = 1
libguestfs: trace: launch
libguestfs: trace: get_tmpdir
libguestfs: trace: get_tmpdir = "/tmp"
libguestfs: trace: version
libguestfs: trace: version = <struct guestfs_version *>
libguestfs: trace: get_backend
libguestfs: trace: get_backend = "direct"
libguestfs: launch: program=virt-sysprep
libguestfs: launch: version=1.24.5
libguestfs: launch: backend registered: unix
libguestfs: launch: backend registered: uml
libguestfs: launch: backend registered: libvirt
libguestfs: launch: backend registered: direct
libguestfs: launch: backend=direct
libguestfs: launch: tmpdir=/tmp/libguestfs6HkWxs
libguestfs: launch: umask=0022
libguestfs: launch: euid=0
libguestfs: command: run: /usr/bin/supermin-helper
libguestfs: command: run: \ --verbose
libguestfs: command: run: \ -f checksum
libguestfs: command: run: \ --host-cpu x86_64
libguestfs: command: run: \ /usr/lib/guestfs/supermin.d
supermin helper [00000ms] whitelist = (not specified)
supermin helper [00000ms] host_cpu = x86_64
supermin helper [00000ms] dtb_wildcard = (not specified)
supermin helper [00000ms] inputs:
supermin helper [00000ms] inputs[0] = /usr/lib/guestfs/supermin.d
supermin helper [00000ms] outputs:
supermin helper [00000ms] kernel = (none)
supermin helper [00000ms] dtb = (none)
supermin helper [00000ms] initrd = (none)
supermin helper [00000ms] appliance = (none)
checking modpath /lib/modules/4.2.0-36-generic is a directory
checking modpath /lib/modules/4.2.0-27-generic is a directory
checking modpath /lib/modules/4.2.0-36-generic is a directory
picked kernel vmlinuz-4.2.0-36-generic.efi.signed
supermin helper [00000ms] finished creating kernel
supermin helper [00000ms] visiting /usr/lib/guestfs/supermin.d
supermin helper [00000ms] visiting /usr/lib/guestfs/supermin.d/daemon.img.gz
supermin helper [00000ms] visiting /usr/lib/guestfs/supermin.d/init.img
supermin helper [00000ms] visiting /usr/lib/guestfs/supermin.d/udev-rules.img
supermin helper [00000ms] adding kernel modules
supermin helper [00040ms] finished creating appliance
libguestfs: checksum of existing appliance: 05ab72a1ee432a4a4356dba8a72c62fd48ba7b7def0aecac577aea7b3088f183
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/var/tmp"
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/var/tmp"
libguestfs: [00043ms] begin building supermin appliance
libguestfs: [00043ms] run supermin-helper
libguestfs: command: run: /usr/bin/supermin-helper
libguestfs: command: run: \ --verbose
libguestfs: command: run: \ --copy-kernel
libguestfs: command: run: \ -f ext2
libguestfs: command: run: \ --host-cpu x86_64
libguestfs: command: run: \ /usr/lib/guestfs/supermin.d
libguestfs: command: run: \ --output-kernel /var/tmp/guestfs.olIel8/kernel
libguestfs: command: run: \ --output-initrd /var/tmp/guestfs.olIel8/initrd
libguestfs: command: run: \ --output-appliance /var/tmp/guestfs.olIel8/root
supermin helper [00000ms] whitelist = (not specified)
supermin helper [00000ms] host_cpu = x86_64
supermin helper [00000ms] dtb_wildcard = (not specified)
supermin helper [00000ms] inputs:
supermin helper [00000ms] inputs[0] = /usr/lib/guestfs/supermin.d
supermin helper [00000ms] outputs:
supermin helper [00000ms] kernel = /var/tmp/guestfs.olIel8/kernel
supermin helper [00000ms] dtb = (none)
supermin helper [00000ms] initrd = /var/tmp/guestfs.olIel8/initrd
supermin helper [00000ms] appliance = /var/tmp/guestfs.olIel8/root
checking modpath /lib/modules/4.2.0-36-generic is a directory
checking modpath /lib/modules/4.2.0-27-generic is a directory
checking modpath /lib/modules/4.2.0-36-generic is a directory
picked kernel vmlinuz-4.2.0-36-generic.efi.signed
supermin helper [00013ms] finished creating kernel
supermin helper [00282ms] finished mke2fs
supermin helper [00282ms] visiting /usr/lib/guestfs/supermin.d
supermin helper [00282ms] visiting /usr/lib/guestfs/supermin.d/daemon.img.gz
supermin helper [00302ms] visiting /usr/lib/guestfs/supermin.d/init.img
supermin helper [00302ms] visiting /usr/lib/guestfs/supermin.d/udev-rules.img
/usr/bin/supermin-helper: ext2: parent directory not found: /lib: File not found by ext2_lookup
libguestfs: command: run: rm
libguestfs: command: run: \ -rf /var/tmp/guestfs.olIel8
libguestfs: trace: launch = -1 (error)
Fatal error: exception Guestfs.Error("/usr/bin/supermin-helper exited with error status 1, see debug messages above")
libguestfs: trace: close
libguestfs: closing guestfs handle 0x1d9fcc0 (state 0)
libguestfs: command: run: rm
libguestfs: command: run: \ -rf /tmp/libguestfs6HkWxs

5.Include the version of libguestfs, the operating system version, and how you installed libguestfs (eg. from source, yum install, etc.)
version : virt-sysprep 1.24.5
operating system version : ubuntu 14.04 trusty
installation method: apt-get install

I need to add that the system i ran this command on, is an Openstack controller.

I appreciate your help.

Regards,
Sajad