NAME

       virt-v2v-input-xen - Using virt-v2v to convert guests from Xen

SYNOPSIS

        export LIBGUESTFS_BACKEND=direct
        virt-v2v -ic 'xen+ssh://root@xen.example.com' GUEST_NAME [-o* options]

DESCRIPTION

       This page documents how to use virt-v2v(1) to convert guests from RHEL 5 Xen, or SLES and OpenSUSE Xen
       hosts.

INPUT FROM XEN

   Set up ssh-agent access to Xen host
       Currently you must enable passwordless SSH access to the remote Xen host from the virt-v2v conversion
       server.

       You must also use ssh-agent, and add your ssh public key to /root/.ssh/authorized_keys (on the Xen host).

       After doing this, you should check that passwordless access works from the virt-v2v server to the Xen
       host.  For example:

        $ ssh root@xen.example.com
        [ logs straight into the shell, no password is requested ]

       Note that password-interactive and Kerberos access are not supported.  You have to set up ssh access
       using ssh-agent and authorized_keys.

       With some modern ssh implementations, legacy crypto policies required to interoperate with RHEL 5 sshd
       are disabled.  To enable them you may need to run this command on the conversion server (ie. ssh client),
       but read update-crypto-policies(8) first:

        # update-crypto-policies LEGACY

   Test libvirt connection to remote Xen host
       Use the virsh(1) command to list the guests on the remote Xen host:

        $ virsh -c xen+ssh://root@xen.example.com list --all
         Id    Name                           State
        ----------------------------------------------------
         0     Domain-0                       running
         -     rhel49-x86_64-pv               shut off

       You should also try dumping the metadata from any guest on your server, like this:

        $ virsh -c xen+ssh://root@xen.example.com dumpxml rhel49-x86_64-pv
        <domain type='xen'>
          <name>rhel49-x86_64-pv</name>
          [...]
        </domain>

       If the above commands do not work, then virt-v2v is not going to work either.  Fix your libvirt
       configuration or the remote server before continuing.

       If the guest disks are located on a host block device, then the conversion will fail.  See "Xen or ssh
       conversions from block devices" below for a workaround.

   Importing a guest
       To import a particular guest from a Xen server, do:

        $ LIBGUESTFS_BACKEND=direct \
              virt-v2v -ic 'xen+ssh://root@xen.example.com' \
                  rhel49-x86_64-pv \
                  -o local -os /var/tmp

       where "rhel49-x86_64-pv" is the name of the guest (which must be shut down).

       In this case the output flags are set to write the converted guest to a temporary directory as this is
       just an example, but you can also write to libvirt or any other supported target.

       Setting the backend to "direct" is a temporary workaround until libvirt bug 1140166 is fixed.

   Xen or ssh conversions from block devices
       Currently virt-v2v cannot directly access a Xen guest (or any guest located remotely over ssh) if that
       guest’s disks are located on host block devices.

       To tell if a Xen guest uses host block devices, look at the guest XML.  You will see:

         <disk type='block' device='disk'>
           ...
           <source dev='/dev/VG/guest'/>

       where "type='block'", "source dev=" and "/dev/..." are all indications that the disk is located on a host
       block device.

       This happens because the qemu ssh block driver that we use to access remote disks uses the ssh sftp
       protocol, and this protocol cannot correctly detect the size of host block devices.

       The workaround is to copy the guest over to the conversion server, using the separate
       virt-v2v-copy-to-local(1) tool, followed by running virt-v2v.  You will need sufficient space on the
       conversion server to store a full copy of the guest.

        virt-v2v-copy-to-local -ic xen+ssh://root@xen.example.com guest
        virt-v2v -i libvirtxml guest.xml -o local -os /var/tmp
        rm guest.xml guest-disk*

SEE ALSO

       virt-v2v(1).

AUTHOR

       Richard W.M. Jones

COPYRIGHT

       Copyright (C) 2009-2019 Red Hat Inc.

LICENSE

       This program is free software; you can redistribute it and/or modify it under the terms of the GNU
       General Public License as published by the Free Software Foundation; either version 2 of the License, or
       (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
       License for more details.

       You should have received a copy of the GNU General Public License along with this program; if not, write
       to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

BUGS

       To get a list of bugs against libguestfs, use this link:
       https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools

       To report a new bug against libguestfs, use this link:
       https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools

       When reporting a bug, please supply:

       •   The version of libguestfs.

       •   Where you got libguestfs (eg. which Linux distro, compiled from source, etc)

       •   Describe the bug accurately and give a way to reproduce it.

       •   Run libguestfs-test-tool(1) and paste the complete, unedited output into the bug report.