名前

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

書式

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

説明

       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

   SSH authentication
       You can use SSH password authentication, by supplying the name of a file containing the password to the
       -ip option (note this option does not take the password directly).

       If you are not using password authentication, an alternative is to 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 ]

       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 --set 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*

関連項目

       virt-v2v(1).

著者

       Richard W.M. Jones

COPYRIGHT

       Copyright (C) 2009-2020 Red Hat Inc.

LICENSE

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.

virt-v2v-1.44.2                                    2021-11-24                              virt-v2v-input-xen(1)