[Libguestfs] Unable to convert vm

[Georg Troxler]

Thanks Richard

this improves the situation but fails with the following:

mount -o ro /dev/sda /sysroot/
[    2.192468] EXT4-fs (sda): VFS: Can't find ext4 filesystem
[    2.193983] EXT4-fs (sda): VFS: Can't find ext4 filesystem
[    2.195496] EXT4-fs (sda): VFS: Can't find ext4 filesystem
[    2.225232] ISOFS: Unable to identify CD-ROM format.
[    2.243647] FAT-fs (sda): invalid media value (0x00)
[    2.244426] FAT-fs (sda): Can't find a valid FAT filesystem
[    2.252264] hfs: can't find a HFS filesystem on dev sda.
[    2.264278] hfs: unable to find HFS+ superblock
mount: wrong fs type, bad option, bad superblock on /dev/sda,
        missing codepage or helper program, or other error
        In some cases useful info is found in syslog - try
        dmesg | tail or so
guestfsd: error: /dev/sda on / (options: 'ro'): mount: wrong fs type, 
bad option, bad superblock on /dev/sda,
        missing codepage or helper program, or other error
        In some cases useful info is found in syslog - try
        dmesg | tail or so

This happens for Ubuntu and RHEL guests. Unfortunately I was unable to 
find any information on this issue as well.







On 4/4/2013 2:09 PM, Richard W.M. Jones wrote:
> On Thu, Apr 04, 2013 at 01:24:05PM +0200, Georg Troxler wrote:
>> I am unable to convert a vm using virt-v2v. From the trace and debug
>> logs I am unable to understand  the cause of the problem. I assume
>> it is a permission or configuration issue but I don't know where to
>> start looking.
>>
>> The following command was issued:
>>
>> LIBGUESTFS_TRACE=1 LIBGUESTFS_DEBUG=1 virt-v2v -ic
>> qemu+ssh://xxx@192.168.xxx.xxx/system -o rhev -os
>> 192.168.xxx.xxx:/mnt/exports -of qcow2 -oa sparse -n ovirtmgmt
>> testvm
>>
>> virt-v2v version is 0.9.0.
>>
>> This is the output produced by the command:
>>
>> libguestfs: trace: set_verbose true
>> libguestfs: trace: set_verbose = 0
>> libguestfs: trace: set_cachedir "/tmp"
>> libguestfs: trace: set_cachedir = 0
>> libguestfs: create: flags = 0, handle = 0x473ce90
>> libguestfs: trace: add_drive "/tmp/lD0zFfpO0_/0e6f780b-6095-4055-a00d-8579b80ad30b/v2v.yxFHyfAJ/1cf96195-fc6e-4e1f-bd55-e71aef7d21a1/2c475cc1-2dd9-487b-8a06-a6ac75c6b7b9"
>> "format:qcow2" "iface:ide" "name:vda"
>> libguestfs: trace: add_drive = 0
>> libguestfs: trace: add_drive "/tmp/bV8yUVWwXU" "readonly:true"
>> "format:raw" "iface:ide"
>> libguestfs: trace: add_drive = 0
>> libguestfs: trace: set_network true
>> libguestfs: trace: set_network = 0
>> libguestfs: trace: launch
>> libguestfs: trace: get_tmpdir
>> libguestfs: trace: get_tmpdir = "/tmp"
>> libguestfs: libvirt version = 10002 (0.10.2)
>> libguestfs: [00000ms] connect to libvirt
>> libguestfs: opening libvirt handle: URI = NULL, auth =
>> virConnectAuthPtrDefault, flags = 0
>> Please enter your authentication name: root
>> Please enter your password:
>> libguestfs: successfully opened libvirt handle: conn = 0x473b490
>> libguestfs: [2616860ms] get libvirt capabilities
>> libguestfs: [2617767ms] parsing capabilities XML
>> libguestfs: [2617768ms] build appliance
>> libguestfs: command: run: febootstrap-supermin-helper
>> libguestfs: command: run: \ --verbose
>> libguestfs: command: run: \ -u 36
>> libguestfs: command: run: \ -g 36
>> libguestfs: command: run: \ -f checksum
>> libguestfs: command: run: \ /usr/lib64/guestfs/supermin.d
>> libguestfs: command: run: \ x86_64
>> supermin helper [00001ms] whitelist = (not specified), host_cpu =
>> x86_64, kernel = (null), initrd = (null), appliance = (null)
>> supermin helper [00002ms] inputs[0] = /usr/lib64/guestfs/supermin.d
>> checking modpath /lib/modules/3.8.4-202.fc18.x86_64 is a directory
>> picked vmlinuz-3.8.4-202.fc18.x86_64 because modpath
>> /lib/modules/3.8.4-202.fc18.x86_64 exists
>> supermin helper [00002ms] finished creating kernel
>> supermin helper [00002ms] visiting /usr/lib64/guestfs/supermin.d
>> supermin helper [00002ms] visiting /usr/lib64/guestfs/supermin.d/base.img
>> supermin helper [00002ms] visiting /usr/lib64/guestfs/supermin.d/daemon.img
>> supermin helper [00002ms] visiting /usr/lib64/guestfs/supermin.d/hostfiles
>> supermin helper [00035ms] visiting /usr/lib64/guestfs/supermin.d/init.img
>> supermin helper [00036ms] visiting
>> /usr/lib64/guestfs/supermin.d/udev-rules.img
>> supermin helper [00036ms] adding kernel modules
>> supermin helper [00068ms] finished creating appliance
>> libguestfs: checksum of existing appliance:
>> 8f00b44cd95de8d4bb0d7dcfe47a3b6b4288db9ca9f5ddf417c91e08924ae699
>> libguestfs: trace: get_cachedir
>> libguestfs: trace: get_cachedir = "/tmp"
>> libguestfs: command: run: qemu-img
>> libguestfs: command: run: \ create
>> libguestfs: command: run: \ -f qcow2
>> libguestfs: command: run: \ -b /tmp/.guestfs-36/root.4124
>> libguestfs: command: run: \ -o backing_fmt=raw
>> libguestfs: command: run: \ /tmp/libguestfsm4E1E4/snapshot1
>> Formatting '/tmp/libguestfsm4E1E4/snapshot1', fmt=qcow2
>> size=4294967296 backing_file='/tmp/.guestfs-36/root.4124'
>> backing_fmt='raw' encryption=off cluster_size=65536
>> lazy_refcounts=off
>> libguestfs: command: run: qemu-img
>> libguestfs: command: run: \ create
>> libguestfs: command: run: \ -f qcow2
>> libguestfs: command: run: \ -b /tmp/bV8yUVWwXU
>> libguestfs: command: run: \ -o backing_fmt=raw
>> libguestfs: command: run: \ /tmp/libguestfsm4E1E4/snapshot2
>> Formatting '/tmp/libguestfsm4E1E4/snapshot2', fmt=qcow2 size=446464
>> backing_file='/tmp/bV8yUVWwXU' backing_fmt='raw' encryption=off
>> cluster_size=65536 lazy_refcounts=off
>> libguestfs: [2617890ms] create libvirt XML
>> libguestfs: trace: launch = -1 (error)
>> virt-v2v: Failed to launch guestfs appliance. Try running again with
>> LIBGUESTFS_DEBUG=1 for more information
>
> virt-v2v doesn't work with the latest version of libguestfs in Fedora 18,
> because we (Fedora) switched over to using libvirt and we didn't
> implement the 'iface' option that virt-v2v requires:
>
>    http://libguestfs.org/guestfs.3.html#guestfs_add_drive_opts
>
> Probably the easiest workaround is to set:
>
>    export LIBGUESTFS_ATTACH_METHOD=appliance
>
> Rich.
>