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(* helper-v2v-input
* Copyright (C) 2009-2021 Red Hat Inc.
*
* 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.
*)
open Printf
open Unix
open Std_utils
open Tools_utils
open Common_gettext.Gettext
open Xpath_helpers
open Types
open Utils
open Parse_libvirt_xml
open Input
module VDDK = struct
let to_string options args =
let xs = "-it vddk" :: args in
let xs =
match options.input_conn with
| Some ic -> ("-ic " ^ ic) :: xs
| None -> xs in
let xs = "-i libvirt" :: xs in
String.concat " " xs
let query_input_options () =
printf (f_"Input options (-io) which can be used with -it vddk:
-io vddk-thumbprint=xx:xx:xx:...
VDDK server thumbprint (required)
All other settings are optional:
-io vddk-config=FILE VDDK configuration file
-io vddk-cookie=COOKIE VDDK cookie
-io vddk-libdir=LIBDIR VDDK library parent directory
-io vddk-nfchostport=PORT VDDK nfchostport
-io vddk-port=PORT VDDK port
-io vddk-snapshot=SNAPSHOT-MOREF
VDDK snapshot moref
-io vddk-transports=MODE:MODE:..
VDDK transports
Refer to nbdkit-vddk-plugin(1) and the VDDK documentation for further
information on these settings.
")
let setup dir options args =
(* Check there are no input options we don't understand.
* Also removes the "vddk-" prefix from the internal list.
*)
let vddk_option_keys =
[ "config";
"cookie";
"libdir";
"nfchostport";
"port";
"snapshot";
"thumbprint";
"transports" ] in
let io_options =
List.map (
fun (key, value) ->
let error_invalid_key () =
error (f_"-it vddk: ‘-io %s’ is not a valid input option") key
in
if not (String.is_prefix key "vddk-") then error_invalid_key ();
let key = String.sub key 5 (String.length key-5) in
if not (List.mem key vddk_option_keys) then error_invalid_key ();
(key, value)
) options.input_options in
(* Check no option appears more than once. *)
let keys = List.map fst io_options in
if List.length keys <> List.length (List.sort_uniq compare keys) then
error (f_"-it vddk: duplicate -io options on the command line");
(* thumbprint is mandatory. *)
if not (List.mem_assoc "thumbprint" io_options) then
error (f_"You must pass the ‘-io vddk-thumbprint’ option with the \
SSL thumbprint of the VMware server. To find the thumbprint, \
see the nbdkit-vddk-plugin(1) manual. See also the \
virt-v2v-input-vmware(1) manual.");
(* Get the guest name. *)
let guest =
match args with
| [arg] -> arg
| _ ->
error (f_"-i libvirt: expecting a libvirt guest name \
on the command line") in
(* -ic must be set and it must contain a server. This is
* enforced by virt-v2v.
*)
let input_conn =
match options.input_conn with
| Some ic -> ic
| None ->
error (f_"-i libvirt: expecting -ic parameter \
for vcenter connection") in
if not options.read_only then
error (f_"in-place mode does not work with VDDK source");
let uri =
try Xml.parse_uri input_conn
with Invalid_argument msg ->
error (f_"could not parse '-ic %s'. Original error message was: %s")
input_conn msg in
(* Connect to the hypervisor. *)
let conn =
let auth = Libvirt_utils.auth_for_password_file
?password_file:options.input_password () in
Libvirt.Connect.connect_auth ~name:input_conn auth in
(* Parse the libvirt XML. *)
let source, disks, xml = parse_libvirt_domain conn guest in
(* Find the <vmware:moref> element from the XML. This was added
* in libvirt >= 3.7 and is required.
*)
let moref =
let doc = Xml.parse_memory xml in
let xpathctx = Xml.xpath_new_context doc in
Xml.xpath_register_ns xpathctx
"vmware" "http://libvirt.org/schemas/domain/vmware/1.0";
let xpath_string = xpath_string xpathctx in
match xpath_string "/domain/vmware:moref" with
| Some moref -> moref
| None ->
error (f_"<vmware:moref> was not found in the output of \
‘virsh dumpxml \"%s\"’. The most likely reason is that \
libvirt is too old, try upgrading \
libvirt to ≥ 3.7.") guest in
(* It probably never happens that the server name can be missing
* from the libvirt URI, but we need a server name to pass to
* nbdkit, so ...
*)
let server =
match uri.Xml.uri_server with
| Some server -> server
| None ->
error (f_"‘-ic %s’ URL does not contain a host name field") input_conn in
let user = uri.Xml.uri_user in
let config =
try Some (List.assoc "config" io_options) with Not_found -> None in
let cookie =
try Some (List.assoc "cookie" io_options) with Not_found -> None in
let libdir =
try Some (List.assoc "libdir" io_options) with Not_found -> None in
let nfchostport =
try Some (List.assoc "nfchostport" io_options) with Not_found -> None in
let port =
try Some (List.assoc "port" io_options) with Not_found -> None in
let snapshot =
try Some (List.assoc "snapshot" io_options) with Not_found -> None in
let thumbprint =
try List.assoc "thumbprint" io_options
with Not_found -> assert false (* checked above *) in
let transports =
try Some (List.assoc "transports" io_options) with Not_found -> None in
(* Create an nbdkit instance for each disk. *)
List.iteri (
fun i { d_format = format; d_type } ->
let socket = sprintf "%s/in%d" dir i in
On_exit.unlink socket;
match d_type with
| BlockDev _ | NBD _ | HTTP _ -> (* These should never happen? *)
assert false
| LocalFile path ->
(* The <source file=...> attribute returned by the libvirt
* VMX driver looks like "[datastore] path". We can use it
* directly as the nbdkit file= parameter, and it is passed
* directly in this form to VDDK.
*)
let nbdkit =
let cor = dir // "convert" in
Nbdkit_vddk.create_vddk ?bandwidth:options.bandwidth
?config ?cookie ~cor
?libdir ~moref
?nfchostport ?password_file:options.input_password ?port
~server ?snapshot ~thumbprint ?transports ?user
path in
let _, pid = Nbdkit.run_unix socket nbdkit in
On_exit.kill pid
) disks;
source
end
|
