2 (* virt-p2v is a script which performs a physical to
3 * virtual conversion of local disks.
5 * Copyright (C) 2007-2008 Red Hat Inc.
6 * Written by Richard W.M. Jones <rjones@redhat.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 | Part of string * string (* eg. "hda", "1" *)
25 | LV of string * string (* eg. "VolGroup00", "LogVol00" *)
27 | P2V (* physical to virtual *)
28 | V2V (* virtual to virtual *)
29 (*| V2P*) (* virtual to physical - not impl *)
31 | Auto of partition (* Automatic network configuration. *)
32 | Shell (* Start a shell. *)
33 | QEMUUserNet (* Assume we're running under qemu. *)
34 | Static of string * string * string * string * string
35 (* interface, address, netmask, gateway, nameserver *)
38 ssh_host : string; (* Remote host for SSH. *)
39 ssh_port : string; (* Remote port. *)
40 ssh_directory : string; (* Remote directory. *)
41 ssh_username : string; (* Remote username. *)
42 ssh_compression : bool; (* If true, use SSH compression. *)
43 ssh_check : bool; (* If true, check SSH is working. *)
50 | I386 | X86_64 | IA64 | PPC | PPC64 | SPARC | SPARC64
54 | W32 | W64 | WUnknown
55 type target_config = {
56 tgt_hypervisor : hypervisor option; (* Remote hypervisor. *)
57 tgt_architecture : architecture; (* Remote architecture. *)
58 tgt_memory : int; (* Memory (megabytes). *)
59 tgt_vcpus : int; (* Number of virtual CPUs. *)
60 tgt_mac_address : string; (* MAC address. *)
61 tgt_libvirtd : bool; (* True if libvirtd on remote. *)
64 (*----------------------------------------------------------------------*)
65 (* TO MAKE A CUSTOM VIRT-P2V SCRIPT, adjust the defaults in this section.
67 * If left as they are, then this will create a generic virt-p2v script
68 * which asks the user for each question. If you set the defaults here
69 * then you will get a custom virt-p2v which is partially or even fully
70 * automated and won't ask the user any questions.
72 * Note that 'None' means 'no default' (ie. ask the user) whereas
73 * 'Some foo' means use 'foo' as the answer.
75 * These are documented in the virt-p2v(1) manual page.
77 * After changing them, run './virt-p2v --test' to check syntax.
80 (* If greeting is true, wait for keypress after boot and during
81 * final verification. Set to 'false' for less interactions.
83 let config_greeting = ref true
85 (* General type of transfer. *)
86 let config_transfer_type = ref None
88 (* Network configuration. *)
89 let config_network = ref None
91 (* SSH configuration. *)
92 let config_ssh = ref None
94 (* What to transfer. *)
95 let config_devices_to_send = ref None
96 let config_root_filesystem = ref None
98 (* Configuration of the target. *)
99 let config_target = ref None
101 (* The name of the program as displayed in various places. *)
102 let program_name = "virt-p2v"
104 (* If you want to test the dialog stages, set this to true. *)
105 let test_dialog_stages = false
107 (* END OF CUSTOM virt-p2v SCRIPT SECTION. *)
108 (*----------------------------------------------------------------------*)
115 (*----------------------------------------------------------------------*)
118 * Use s_ "string" to mark a translatable string, and f_ "string %s"
119 * to mark a format string (eg. for printf). There are other
120 * functions: see ocaml-gettext manual and GNU gettext info.
122 * Try not to mark strings which always go to the log file (eg.
126 module P2VGettext = Gettext.Program (
128 let textdomain = "virt-p2v"
131 let dependencies = []
133 ) (GettextStub.Native)
136 (*----------------------------------------------------------------------*)
137 (* General helper functions. *)
139 let sort_uniq ?(cmp = compare) xs = (* sort and uniq a list *)
140 let xs = List.sort ~cmp xs in
141 let rec loop = function
142 | [] -> [] | [x] -> [x]
143 | x1 :: x2 :: xs when x1 = x2 -> loop (x1 :: xs)
144 | x :: xs -> x :: loop xs
148 let input_all_lines chan =
149 let lines = ref [] in
151 while true do lines := input_line chan :: !lines done; []
153 End_of_file -> List.rev !lines
155 let dev_of_partition = function
156 | Part (dev, partnum) -> sprintf "/dev/%s%s" dev partnum
157 | LV (vg, lv) -> sprintf "/dev/%s/%s" vg lv
159 let string_of_architecture = function
166 | SPARC64 -> "sparc64"
167 | OtherArch arch -> arch
170 let architecture_of_string = function
172 String.length str = 4 &&
173 (str.[0] = 'i' || str.[0] = 'I') &&
174 (str.[1] >= '3' && str.[1] <= '6') &&
175 str.[2] = '8' && str.[3] = '6' -> I386
176 | "x86_64" | "X86_64" | "x86-64" | "X86-64" -> X86_64
177 | "ia64" | "IA64" -> IA64
178 | "ppc" | "PPC" | "ppc32" | "PPC32" -> PPC
179 | "ppc64" | "PPC64" -> PPC64
180 | "sparc" | "SPARC" | "sparc32" | "SPARC32" -> SPARC
181 | "sparc64" | "SPARC64" -> SPARC64
183 | str -> OtherArch str
185 let wordsize_of_architecture = function
193 | OtherArch arch -> WUnknown
194 | UnknownArch -> WUnknown
196 type nature = LinuxSwap
197 | LinuxRoot of architecture * linux_distro
198 | WindowsRoot (* Windows C: *)
199 | LinuxBoot (* Linux /boot *)
200 | NotRoot (* mountable, but not / or /boot *)
202 and linux_distro = RHEL of int * int
204 | Debian of int * int
207 let rec string_of_nature = function
208 | LinuxSwap -> s_ "Linux swap"
209 | LinuxRoot (architecture, distro) ->
210 string_of_linux_distro distro ^ " " ^ string_of_architecture architecture
211 | WindowsRoot -> s_ "Windows root"
212 | LinuxBoot -> s_ "Linux /boot"
213 | NotRoot -> s_ "Mountable non-root"
214 | UnknownNature -> s_ "Unknown partition type"
215 and string_of_linux_distro = function
216 | RHEL (a,b) -> sprintf "RHEL %d.%d" a b
217 | Fedora v -> sprintf "Fedora %d" v
218 | Debian (a,b) -> sprintf "Debian %d.%d" a b
219 | OtherLinux -> "Linux"
221 (* XML helper functions. *)
222 let rec children_with_name name xml =
223 let children = Xml.children xml in
226 | Xml.Element (n, _, _) when n = name -> true
229 and xml_has_pcdata_child name pcdata xml =
230 xml_has_child_matching (
232 | Xml.Element (n, _, [Xml.PCData pcd])
233 when n = name && pcd = pcdata -> true
236 and xml_has_attrib_child name attrib xml =
237 xml_has_child_matching (
239 | Xml.Element (n, attribs, _)
240 when n = name && List.mem attrib attribs -> true
243 and xml_has_child_matching f xml =
244 let children = Xml.children xml in
245 List.exists f children
246 and find_child_with_name name xml =
247 let children = children_with_name name xml in
249 | [] -> raise Not_found
251 and find_pcdata_child name xml =
252 let children = children_with_name name xml in
253 let rec loop = function
254 | [] -> raise Not_found
255 | Xml.Element (_, _, [Xml.PCData pcd]) :: _ -> pcd
260 type ('a, 'b) either = Either of 'a | Or of 'b
262 (* We go into and out of newt mode at various stages, but we might
263 * also need to put up a message at any time. This keeps track of
264 * whether we are in newt mode or not.
266 * General tip: Try to do any complex operations like setting up the
267 * network or probing disks outside newt mode, and try not to throw
268 * exceptions in newt mode.
270 let in_newt = ref false
272 if !in_newt then f ()
276 try Either (Newt.init_and_finish f)
277 with exn -> Or exn in
279 match r with Either r -> r | Or exn -> raise exn
282 (* Clear the screen, open a new centered window, make sure the background
283 * and help messages are consistent.
285 let open_centered_window ?stage width height title =
286 if not !in_newt then failwith (s_ "open_centered_window: not in newt mode");
288 Newt.centered_window width height title;
290 program_name ^ (match stage with
292 | Some stage -> " - " ^ stage) in
293 Newt.draw_root_text 0 0 root_text;
295 (s_ "F12 for next screen | [ALT] [F2] root / no password for shell")
297 let ok_button = " OK "
299 (* Some general dialog boxes. *)
300 let message_box title text =
303 open_centered_window 40 20 title;
305 let textbox = Newt.textbox 1 1 36 14 [Newt.WRAP; Newt.SCROLL] in
306 Newt.textbox_set_text textbox text;
307 let ok = Newt.button 28 16 ok_button in
308 let form = Newt.form None None [] in
309 Newt.form_add_components form [textbox; ok];
311 Newt.component_takes_focus ok true;
313 ignore (Newt.run_form form);
317 (* Fail and exit with error. *)
322 ^ s_ "\n\nIf you want to report this error, there is a shell on [ALT] [F2], log in as root with no password.\n\nPlease provide the contents of /tmp/virt-p2v.log and output of the 'dmesg' command." in
323 message_box (s_ "Error") text;
326 (* Display a dialog with checkboxes, return the multiple selected items. *)
327 let select_multiple ?stage ?(force_one = false) width title items =
330 open_centered_window ?stage width 20 title;
334 fun i (label, handle, selected) ->
336 Newt.checkbox 1 (i+1) label
337 (if selected then '*' else ' ') None in
341 let ok = Newt.button 48 16 ok_button in
344 if List.length entries > 10 then
345 Some (Newt.vertical_scrollbar 58 1 10
346 Newt_int.NEWT_COLORSET_WINDOW
347 Newt_int.NEWT_COLORSET_ACTCHECKBOX)
350 let form = Newt.form vb None [] in
351 Newt.form_add_components form (List.map snd entries);
352 Newt.form_add_component form ok;
356 ignore (Newt.run_form form);
357 let selected = List.filter_map (
359 if Newt.checkbox_get_value cb = '*' then Some handle else None
361 if force_one && selected = [] then loop ()
371 (* Display a dialog with radio buttons, return the single selected item. *)
372 let select_single ?stage width title items =
373 if items = [] then failwith "select_single: no items";
377 open_centered_window ?stage width 20 title;
379 let prev = ref None in
382 fun i (label, handle) ->
383 let rb = Newt.radio_button 1 (i+1) label (!prev = None) !prev in
388 let ok = Newt.button (width-12) 16 ok_button in
391 if List.length entries > 10 then
392 Some (Newt.vertical_scrollbar 58 1 10
393 Newt_int.NEWT_COLORSET_WINDOW
394 Newt_int.NEWT_COLORSET_ACTCHECKBOX)
397 let form = Newt.form vb None [] in
398 Newt.form_add_components form (List.map snd entries);
399 Newt.form_add_component form ok;
403 ignore (Newt.run_form form);
404 let r = Option.get !prev in
405 let r = Newt.radio_get_current r in
406 (* Now we compare 'r' to all the 'rb's in the list
407 * to see which one is selected.
410 List.find (fun (_, rb) -> Newt.component_equals r rb) entries
421 (* Shell-safe quoting function. In fact there's one in stdlib so use it. *)
422 let quote = Filename.quote
424 (* Run a shell command and check it returns 0. *)
426 eprintf "sh: %s\n%!" cmd;
427 if Sys.command cmd <> 0 then
428 failwith (sprintf (f_ "Command failed:\n\n%s") cmd)
431 eprintf "shfailok: %s\n%!" cmd;
432 ignore (Sys.command cmd)
434 let shwithstatus cmd =
435 eprintf "shwithstatus: %s\n%!" cmd;
438 (* Same as `cmd` in shell. Any error message will be in the logfile. *)
440 eprintf "shget: %s\n%!" cmd;
441 let chan = open_process_in cmd in
442 let lines = input_all_lines chan in
443 match close_process_in chan with
444 | WEXITED 0 -> Some lines (* command succeeded *)
445 | WEXITED _ -> None (* command failed *)
447 failwith (sprintf (f_ "shget: command killed by signal %d") i)
449 failwith (sprintf (f_ "shget: command stopped by signal %d") i)
451 (* Start an interactive shell. Need to juggle file descriptors a bit
452 * because bash write PS1 to stderr (currently directed to the logfile).
456 | 0 -> (* child, runs bash *)
459 (* Sys.command runs 'sh -c' which blows away PS1, so set it late. *)
461 Sys.command "PS1='\\u@\\h:\\w\\$ ' /bin/bash --norc --noprofile -i"
463 | _ -> (* parent, waits *)
464 eprintf "waiting for subshell to exit\n%!";
467 (* Some true if is dir/file, Some false if not, None if not found. *)
469 try Some ((stat path).st_kind = S_DIR)
470 with Unix_error (ENOENT, "stat", _) -> None
472 try Some ((stat path).st_kind = S_REG)
473 with Unix_error (ENOENT, "stat", _) -> None
475 (*----------------------------------------------------------------------*)
476 (* P2V-specific helper functions. *)
478 (* Generate a predictable safe name containing only letters, numbers
479 * and underscores. If passed a string with no letters or numbers,
480 * generates "_1", "_2", etc.
485 fun () -> incr i; "_" ^ string_of_int !i
488 let is_safe = function 'a'..'z'|'A'..'Z'|'0'..'9' -> true | _ -> false in
489 let name = String.copy name in
490 let have_safe = ref false in
491 for i = 0 to String.length name - 1 do
492 if not (is_safe name.[i]) then name.[i] <- '_' else have_safe := true
494 if !have_safe then name else next_anon ()
496 type block_device = string * int64 (* "hda" & size in bytes *)
498 (* Parse the output of 'lvs' to get list of LV names, sizes,
499 * corresponding PVs, etc. Returns a list of (lvname, PVs, lvsize).
502 let devname = Pcre.regexp "^/dev/(.+)\\(.+\\)$" in
506 shget "lvs --noheadings -o vg_name,lv_name,devices,lv_size"
510 let lines = List.map Pcre.split lines in
513 | [vg; lv; pvs; lvsize]
514 | [_; vg; lv; pvs; lvsize] ->
515 let pvs = String.nsplit pvs "," in
516 let pvs = List.filter_map (
519 let subs = Pcre.exec ~rex:devname pv in
520 Some (Pcre.get_substring subs 1)
523 eprintf "lvs: unexpected device name: %s\n%!" pv;
526 LV (vg, lv), pvs, lvsize
528 failwith ("lvs: " ^ s_ "unexpected output: " ^
529 String.concat "," line)
532 (* Get the partitions on a block device.
533 * eg. "sda" -> [Part ("sda","1"); Part ("sda", "2")]
535 let get_partitions dev =
536 let rex = Pcre.regexp ("^" ^ dev ^ "(.+)$") in
537 let devdir = "/sys/block/" ^ dev in
538 let parts = Sys.readdir devdir in
539 let parts = Array.to_list parts in
540 let parts = List.filter (
541 fun name -> Some true = is_dir (devdir ^ "/" ^ name)
543 let parts = List.filter_map (
546 let subs = Pcre.exec ~rex part in
547 Some (Part (dev, Pcre.get_substring subs 1))
553 (* Generate snapshot device name from device name. *)
554 let snapshot_name dev =
555 "snap" ^ (safe_name dev)
557 (* Perform a device-mapper snapshot with ramdisk overlay. *)
559 let next_free_ram_disk =
561 fun () -> incr i; "/dev/ram" ^ string_of_int !i
563 fun origin_dev snapshot_dev ->
564 let ramdisk = next_free_ram_disk () in
566 let cmd = "blockdev --getsz " ^ quote ("/dev/" ^ origin_dev) in
567 let lines = shget cmd in
569 | Some (sectors::_) -> Int64.of_string sectors
571 failwith (sprintf (f_ "Disk snapshot failed: unable to read the size in sectors of block device %s") origin_dev) in
573 (* Create the snapshot origin device. Called, eg. snap_sda1_org *)
574 sh (sprintf "dmsetup create %s_org --table='0 %Ld snapshot-origin /dev/%s'"
575 snapshot_dev sectors origin_dev);
576 (* Create the snapshot. *)
577 sh (sprintf "dmsetup create %s --table='0 %Ld snapshot /dev/mapper/%s_org %s n 64'"
578 snapshot_dev sectors snapshot_dev ramdisk)
580 (* Try to perform automatic network configuration, assuming a Fedora or
581 * RHEL-like root filesystem mounted on /mnt/root.
583 let auto_network () =
584 (* Fedora gives an error if this file doesn't exist. *)
585 sh "touch /etc/resolv.conf";
587 (* NB. Lazy unmount is required because dhclient keeps its current
588 * directory open on /etc/sysconfig/network-scripts/
589 * (Fixed in dhcp >= 4.0.0 but be generous anyway).
591 sh "mount -o bind /mnt/root/etc /etc";
592 let status = shwithstatus "/etc/init.d/network start" in
595 (* Try to ping the default gateway to see if this worked. *)
596 shfailok "ping -c3 `/sbin/ip route list match 0.0.0.0 | head -1 | awk '{print $3}'`";
598 if !config_greeting then (
599 print_endline (s_ "\n\nDid automatic network configuration work?\nHint: If not sure, there is a shell on console [ALT] [F2]");
601 let line = read_line () in
602 String.length line > 0 && (line.[0] = 'y' || line.[0] = 'Y')
605 (* Non-interactive: return the status of /etc/init.d/network start. *)
608 (* Configure the network statically. *)
609 let static_network (interface, address, netmask, gateway, nameserver) =
610 let do_cmd_or_exit cmd = if shwithstatus cmd <> 0 then raise Exit in
612 do_cmd_or_exit (sprintf "ifconfig %s %s netmask %s"
613 (quote interface) (quote address) (quote netmask));
614 do_cmd_or_exit (sprintf "route add default gw %s %s"
615 (quote gateway) (quote interface));
616 if nameserver <> "" then
617 do_cmd_or_exit (sprintf "echo nameserver %s > /etc/resolv.conf"
621 Exit -> false (* failed *)
623 (* http://fabrice.bellard.free.fr/qemu/qemu-doc.html#SEC30 *)
624 let qemu_network () =
625 sh "ifconfig eth0 10.0.2.10 netmask 255.255.255.0";
626 sh "route add default gw 10.0.2.2 eth0";
627 sh "echo nameserver 10.0.2.3 > /etc/resolv.conf"
629 (* Map local device names to remote devices names. At the moment we
630 * just change sd* to hd* (as device names appear under fullvirt). In
631 * future, lots of complex possibilities.
633 let remote_of_origin_dev =
634 let devsd = Pcre.regexp "^sd([[:alpha:]]+[[:digit:]]*)$" in
635 let devsd_subst = Pcre.subst "hd$1" in
637 Pcre.replace ~rex:devsd ~itempl:devsd_subst dev
639 (* Make an SSH connection to the remote machine, execute command.
640 * The connection remains open until you call ssh_disconnect, it
641 * times out or there is some error.
643 * NB. The command is NOT quoted.
645 * Returns a pair (file descriptor, channel), both referring to the
646 * same thing. Use whichever is more convenient.
648 let ssh_connect config cmd =
649 let cmd = sprintf "ssh%s -l %s -p %s %s %s"
650 (if config.ssh_compression then " -C" else "")
651 (quote config.ssh_username) (quote config.ssh_port) (quote config.ssh_host)
653 eprintf "ssh_connect: %s\n%!" cmd;
654 let chan = open_process_out cmd in
655 descr_of_out_channel chan, chan
657 let ssh_disconnect (_, chan) =
658 eprintf "ssh_disconnect\n%!";
659 match close_process_out chan with
660 | WEXITED 0 -> () (* OK *)
661 | WEXITED i -> failwith (sprintf (f_ "ssh: exited with error code %d") i)
662 | WSIGNALED i -> failwith (sprintf (f_ "ssh: killed by signal %d") i)
663 | WSTOPPED i -> failwith (sprintf (f_ "ssh: stopped by signal %d") i)
665 (* Use these functions to upload a file. *)
666 let ssh_start_upload config filename =
668 sprintf "cat \\> %s/%s" (quote config.ssh_directory) (quote filename) in
669 ssh_connect config cmd
671 let ssh_finish_upload = ssh_disconnect
673 (* Test SSH connection. *)
674 let test_ssh config =
676 (s_ "Testing SSH connection by listing files in remote directory ...\n");
678 let cmd = sprintf "/bin/ls %s" (quote config.ssh_directory) in
679 let conn = ssh_connect config cmd in
682 if !config_greeting then (
683 print_endline (s_ "\n\nDid SSH work?\nHint: If not sure, there is a shell on console [ALT] [F2]\n");
685 let line = read_line () in
686 String.length line > 0 && (line.[0] = 'y' || line.[0] = 'Y')
691 (* Rewrite /mnt/root/etc/fstab. *)
692 let rewrite_fstab devices_to_send =
693 let filename = "/mnt/root/etc/fstab" in
694 if is_file filename = Some true then (
695 sh ("cp " ^ quote filename ^ " " ^ quote (filename ^ ".p2vsaved"));
697 let chan = open_in filename in
698 let lines = input_all_lines chan in
700 let lines = List.map Pcre.split lines in
701 let lines = List.map (
703 | dev :: rest when String.starts_with dev "/dev/" ->
704 let dev = String.sub dev 5 (String.length dev - 5) in
705 let dev = remote_of_origin_dev dev in
706 let dev = "/dev/" ^ dev in
711 let chan = open_out filename in
714 | [dev; mountpoint; fstype; options; freq; passno] ->
715 fprintf chan "%-23s %-23s %-7s %-15s %s %s\n"
716 dev mountpoint fstype options freq passno
718 output_string chan (String.concat " " line);
719 output_char chan '\n'
724 (* Generate a random MAC address in the Xen-reserved space. *)
725 let random_mac_address () =
727 List.map (sprintf "%02x") (
728 List.map (fun _ -> Random.int 256) [0;0;0]
730 String.concat ":" ("00"::"16"::"3e"::random)
732 (* Generate a random UUID. *)
734 let hex = "0123456789abcdef" in
736 let str = String.create 32 in
737 for i = 0 to 31 do str.[i] <- hex.[Random.int 16] done;
740 (*----------------------------------------------------------------------*)
741 (* Main entry point. *)
743 (* The general plan for the main function is to operate in stages:
748 * Information gathering about the system
749 * | (eg. block devices, number of CPUs, etc.)
751 * Greeting and type of transfer question
755 * | (after this point we have a working network)
758 * | (after this point we have a working SSH connection)
760 * Questions about what to transfer (block devs, root fs) <--.
763 * Questions about hypervisor configuration |
766 * Verify information -------- user wants to change info ----/
771 * Prior versions of virt-p2v (the ones which used 'dialog') had support
772 * for a back button so they could go back through dialogs. I removed
773 * this because it was hard to support and not particularly useful.
776 let rec main ttyname =
779 (* Running from an init script. We don't have much of a
780 * login environment, so set one up.
784 ["/usr/sbin"; "/sbin"; "/usr/local/bin"; "/usr/kerberos/bin";
785 "/usr/bin"; "/bin"]);
786 putenv "HOME" "/root";
787 putenv "LOGNAME" "root";
789 (* We can safely write in /tmp (it's a synthetic live CD directory). *)
792 (* Set up logging to /tmp/virt-p2v.log. *)
793 let fd = openfile "virt-p2v.log" [ O_WRONLY; O_APPEND; O_CREAT ] 0o644 in
797 (* Log the start up time. *)
798 eprintf "\n\n**************************************************\n\n";
799 let tm = localtime (time ()) in
800 eprintf "%s starting up at %04d-%02d-%02d %02d:%02d:%02d\n\n%!"
802 (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min tm.tm_sec;
804 (* Connect stdin/stdout to the tty. *)
808 let fd = openfile ("/dev/" ^ ttyname) [ O_RDWR ] 0 in
813 let () = printf (f_ "%s starting up ...\n%!") program_name in
815 (* Disable screen blanking on tty. *)
816 sh "setterm -blank 0";
818 (* Check that the environment is a sane-looking live CD. If not, bail. *)
819 if not test_dialog_stages && is_dir "/mnt/root" <> Some true then
821 (s_ "You should only run this script from the live CD or a USB key.");
823 (* Start of the information gathering phase. *)
825 (s_ "Detecting hard drives (this may take some time) ...");
827 (* Search for all non-removable block devices. Do this early and bail
828 * if we can't find anything. This is a list of strings, like "hda".
830 let all_block_devices : block_device list =
831 let rex = Pcre.regexp "^[hs]d" in
832 let devices = Array.to_list (Sys.readdir "/sys/block") in
833 let devices = List.sort devices in
834 let devices = List.filter (fun d -> Pcre.pmatch ~rex d) devices in
835 eprintf "all_block_devices: block devices: %s\n%!"
836 (String.concat "; " devices);
837 (* Run blockdev --getsize64 on each, and reject any where this fails
838 * (probably removable devices).
840 let devices = List.filter_map (
842 let cmd = "blockdev --getsize64 " ^ quote ("/dev/" ^ d) in
843 let lines = shget cmd in
845 | Some (blksize::_) -> Some (d, Int64.of_string blksize)
846 | Some [] | None -> None
848 eprintf "all_block_devices: non-removable block devices: %s\n%!"
850 (List.map (fun (d, b) -> sprintf "%s [%Ld]" d b) devices));
853 (s_ "No non-removable block devices (hard disks, etc.) could be found on this machine.");
856 (* Search for partitions and LVs (anything that could contain a
857 * filesystem directly). We refer to these generically as
860 let all_partitions : partition list =
863 let lvs = get_lvs () in
864 let pvs = List.map (fun (_, pvs, _) -> pvs) lvs in
865 let pvs = List.concat pvs in
866 let pvs = sort_uniq pvs in
867 eprintf "all_partitions: PVs: %s\n%!" (String.concat "; " pvs);
868 let lvs = List.map (fun (lvname, _, _) -> lvname) lvs in
869 eprintf "all_partitions: LVs: %s\n%!"
870 (String.concat "; " (List.map dev_of_partition lvs));
873 (* Partitions (eg. "sda1", "sda2"). *)
875 let parts = List.map fst all_block_devices in
876 let parts = List.map get_partitions parts in
877 let parts = List.concat parts in
878 eprintf "all_partitions: all partitions: %s\n%!"
879 (String.concat "; " (List.map dev_of_partition parts));
881 (* Remove any partitions which are PVs. *)
882 let parts = List.filter (
884 | Part (dev, partnum) -> not (List.mem (dev ^ partnum) pvs)
885 | LV _ -> assert false
888 eprintf "all_partitions: partitions after removing PVs: %s\n%!"
889 (String.concat "; " (List.map dev_of_partition parts));
891 (* Concatenate LVs & Parts *)
894 (* Try to determine the nature of each partition.
895 * Root? Swap? Architecture? etc.
897 let all_partitions : (partition * nature) list =
898 (* Output of 'file' command for Linux swap file. *)
899 let swap = Pcre.regexp "Linux.*swap.*file" in
900 (* Contents of /etc/redhat-release. *)
901 let rhel = Pcre.regexp "(?:Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\\d+)(?:\\.(\\d+))?" in
902 let fedora = Pcre.regexp "Fedora.*release (\\d+)" in
903 (* Contents of /etc/debian_version. *)
904 let debian = Pcre.regexp "^(\\d+)\\.(\\d+)" in
905 (* Output of 'file' on certain executables. *)
906 let i386 = Pcre.regexp ", Intel 80386," in
907 let x86_64 = Pcre.regexp ", x86-64," in
908 let itanic = Pcre.regexp ", IA-64," in
910 (* Examine the filesystem mounted on 'mnt' to determine the
911 * operating system, and, if Linux, the distro.
914 if is_dir (mnt ^ "/Windows") = Some true &&
915 is_file (mnt ^ "/autoexec.bat") = Some true then
917 else if is_dir (mnt ^ "/etc") = Some true &&
918 is_dir (mnt ^ "/sbin") = Some true &&
919 is_dir (mnt ^ "/var") = Some true then (
920 if is_file (mnt ^ "/etc/redhat-release") = Some true then (
921 let chan = open_in (mnt ^ "/etc/redhat-release") in
922 let lines = input_all_lines chan in
926 | [] -> (* empty /etc/redhat-release ...? *)
927 LinuxRoot (UnknownArch, OtherLinux)
928 | line::_ -> (* try to detect OS from /etc/redhat-release *)
930 let subs = Pcre.exec ~rex:rhel line in
931 let major = int_of_string (Pcre.get_substring subs 1) in
933 try int_of_string (Pcre.get_substring subs 2)
934 with Not_found -> 0 in
935 LinuxRoot (UnknownArch, RHEL (major, minor))
937 Not_found | Failure "int_of_string" ->
939 let subs = Pcre.exec ~rex:fedora line in
940 let version = int_of_string (Pcre.get_substring subs 1) in
941 LinuxRoot (UnknownArch, Fedora version)
943 Not_found | Failure "int_of_string" ->
944 LinuxRoot (UnknownArch, OtherLinux)
946 else if is_file (mnt ^ "/etc/debian_version") = Some true then (
947 let chan = open_in (mnt ^ "/etc/debian_version") in
948 let lines = input_all_lines chan in
952 | [] -> (* empty /etc/debian_version ...? *)
953 LinuxRoot (UnknownArch, OtherLinux)
954 | line::_ -> (* try to detect version from /etc/debian_version *)
956 let subs = Pcre.exec ~rex:debian line in
957 let major = int_of_string (Pcre.get_substring subs 1) in
958 let minor = int_of_string (Pcre.get_substring subs 2) in
959 LinuxRoot (UnknownArch, Debian (major, minor))
961 Not_found | Failure "int_of_string" ->
962 LinuxRoot (UnknownArch, OtherLinux)
965 LinuxRoot (UnknownArch, OtherLinux)
966 ) else if is_dir (mnt ^ "/grub") = Some true &&
967 is_file (mnt ^ "/grub/stage1") = Some true then (
970 NotRoot (* mountable, but not a root filesystem *)
973 (* Examine the Linux root filesystem mounted on 'mnt' to
974 * determine the architecture. We do this by looking at some
975 * well-known binaries that we expect to be there.
977 let detect_architecture mnt =
978 let cmd = "file -bL " ^ quote (mnt ^ "/sbin/init") in
980 | Some (str::_) when Pcre.pmatch ~rex:i386 str -> I386
981 | Some (str::_) when Pcre.pmatch ~rex:x86_64 str -> X86_64
982 | Some (str::_) when Pcre.pmatch ~rex:itanic str -> IA64
988 let dev = dev_of_partition part in (* Get /dev device. *)
991 (* Use 'file' command to detect if it is swap. *)
992 let cmd = "file -sbL " ^ quote dev in
994 | Some (str::_) when Pcre.pmatch ~rex:swap str -> LinuxSwap
996 (* Blindly try to mount the device. *)
997 let cmd = "mount -o ro " ^ quote dev ^ " /mnt/root" in
998 match shwithstatus cmd with
1000 let os = detect_os "/mnt/root" in
1003 | LinuxRoot (UnknownArch, distro) ->
1004 let architecture = detect_architecture "/mnt/root" in
1005 LinuxRoot (architecture, distro)
1007 sh "umount /mnt/root";
1010 | _ -> UnknownNature (* not mountable *)
1014 eprintf "partition detection: %s is %s\n%!"
1015 dev (string_of_nature nature);
1021 print_endline (s_ "Finished detecting hard drives.");
1023 (* Autodetect system memory. *)
1025 (* Try to parse dmesg first to find the 'Memory:' report when
1026 * the kernel booted. If available, this can give us an
1027 * indication of usable RAM on this system.
1029 let dmesg = shget "dmesg" in
1032 match dmesg with Some lines -> lines | None -> raise Not_found in
1034 List.find (fun line -> String.starts_with line "Memory: ") dmesg in
1035 let subs = Pcre.exec ~pat:"k/([[:digit:]]+)k available" line in
1036 let mem = Pcre.get_substring subs 1 in
1037 int_of_string mem / 1024
1039 Not_found | Failure "int_of_string" ->
1040 (* 'dmesg' can't be parsed. The backup plan is to look
1043 let mem = shget "head -1 /proc/meminfo | awk '{print $2/1024}'" in
1045 | Some (mem::_) -> int_of_float (float_of_string mem)
1047 (* For some reason even /proc/meminfo didn't work. Just
1048 * assume 256 MB instead.
1052 (* Autodetect system # pCPUs. *)
1053 let system_nr_cpus =
1055 shget "grep ^processor /proc/cpuinfo | tail -1 | awk '{print $3+1}'" in
1057 | Some (cpus::_) -> int_of_string cpus
1060 (* Greeting, type of transfer, network question stages.
1061 * These are all done in newt mode.
1063 let config_transfer_type, config_network =
1067 if !config_greeting then
1068 message_box program_name (sprintf (f_ "Welcome to %s, a live CD for migrating a physical machine to a virtualized host.\n\nTo continue press the Return key.\n\nTo get a shell you can use [ALT] [F2] and log in as root with no password.\n\nExtra information is logged in /tmp/virt-p2v.log but this file disappears when the machine reboots.") program_name);
1070 (* Type of transfer. *)
1071 let config_transfer_type =
1072 match !config_transfer_type with
1076 s_ "Physical to Virtual (P2V)", P2V;
1077 s_ "Virtual to Virtual (V2V)", V2V;
1080 select_single ~stage:(s_ "Transfer type") 40
1081 (s_ "Transfer type")
1084 (* Network configuration. *)
1085 let config_network =
1086 match !config_network with
1089 open_centered_window ~stage:(s_ "Network")
1090 60 20 (s_ "Configure network");
1092 let autolist = Newt.listbox 4 2 4 [Newt.SCROLL] in
1093 Newt.listbox_set_width autolist 52;
1095 (* Populate the "Automatic" listbox with RHEL/Fedora
1096 * root partitions found which allow us to do
1097 * automatic configuration in a known way.
1099 let rec loop = function
1101 | (partition, LinuxRoot (_, ((RHEL _|Fedora _) as distro)))
1105 (dev_of_partition partition)
1106 (string_of_linux_distro distro) in
1107 ignore (Newt.listbox_append_entry autolist label partition);
1109 | _ :: parts -> loop parts
1111 loop all_partitions;
1113 (* If there is no suitable root partition (the listbox
1114 * is empty) then disable the auto option and the listbox.
1116 let no_auto = Newt.listbox_item_count autolist = 0 in
1119 Newt.radio_button 1 1
1120 (s_ "Automatic from:") (not no_auto) None in
1122 Newt.radio_button 1 6
1123 (s_ "Start a shell") no_auto (Some auto) in
1126 Newt.component_takes_focus auto false;
1127 Newt.component_takes_focus
1128 (Newt.component_of_listbox autolist) false
1132 Newt.radio_button 1 7
1133 (s_ "QEMU user network") false (Some shell) in
1135 Newt.radio_button 1 8
1136 (s_ "Don't configure the network") false (Some qemu) in
1138 Newt.radio_button 1 9
1139 (s_ "Static configuration:") false (Some nonet) in
1141 let label1 = Newt.label 4 10 (s_ "Interface") in
1142 let entry1 = Newt.entry 16 10 (Some "eth0") 8 [] in
1143 let label2 = Newt.label 4 11 (s_ "IP") in
1144 let entry2 = Newt.entry 16 11 None 16 [] in
1145 let label3 = Newt.label 4 12 (s_ "Netmask") in
1146 let entry3 = Newt.entry 16 12 (Some "255.255.255.0") 16 [] in
1147 let label4 = Newt.label 4 13 (s_ "Gateway") in
1148 let entry4 = Newt.entry 16 13 None 16 [] in
1149 let label5 = Newt.label 4 14 (s_ "Nameserver") in
1150 let entry5 = Newt.entry 16 14 None 16 [] in
1152 let enable_static () =
1153 Newt.component_takes_focus entry1 true;
1154 Newt.component_takes_focus entry2 true;
1155 Newt.component_takes_focus entry3 true;
1156 Newt.component_takes_focus entry4 true;
1157 Newt.component_takes_focus entry5 true
1160 let disable_static () =
1161 Newt.component_takes_focus entry1 false;
1162 Newt.component_takes_focus entry2 false;
1163 Newt.component_takes_focus entry3 false;
1164 Newt.component_takes_focus entry4 false;
1165 Newt.component_takes_focus entry5 false
1168 let enable_autolist () =
1169 Newt.component_takes_focus
1170 (Newt.component_of_listbox autolist) true
1172 let disable_autolist () =
1173 Newt.component_takes_focus
1174 (Newt.component_of_listbox autolist) false
1178 Newt.component_add_callback auto
1179 (fun () ->disable_static (); enable_autolist ());
1180 Newt.component_add_callback shell
1181 (fun () -> disable_static (); disable_autolist ());
1182 Newt.component_add_callback qemu
1183 (fun () -> disable_static (); disable_autolist ());
1184 Newt.component_add_callback nonet
1185 (fun () -> disable_static (); disable_autolist ());
1186 Newt.component_add_callback static
1187 (fun () -> enable_static (); disable_autolist ());
1189 let ok = Newt.button 48 16 ok_button in
1191 let form = Newt.form None None [] in
1192 Newt.form_add_components form [auto;
1193 Newt.component_of_listbox autolist;
1194 shell;qemu;nonet;static;
1195 label1;label2;label3;label4;label5;
1196 entry1;entry2;entry3;entry4;entry5;
1201 ignore (Newt.run_form form);
1203 let r = Newt.radio_get_current auto in
1204 if Newt.component_equals r auto then (
1205 match Newt.listbox_get_current autolist with
1207 | Some part -> Auto part
1209 else if Newt.component_equals r shell then Shell
1210 else if Newt.component_equals r qemu then QEMUUserNet
1211 else if Newt.component_equals r nonet then NoNetwork
1212 else if Newt.component_equals r static then (
1213 let interface = Newt.entry_get_value entry1 in
1214 let address = Newt.entry_get_value entry2 in
1215 let netmask = Newt.entry_get_value entry3 in
1216 let gateway = Newt.entry_get_value entry4 in
1217 let nameserver = Newt.entry_get_value entry5 in
1218 if interface = "" || address = "" ||
1219 netmask = "" || gateway = "" then
1222 Static (interface, address, netmask, gateway, nameserver)
1231 config_transfer_type, config_network
1234 (* Try to bring up the network. *)
1235 (match config_network with
1237 print_endline (s_ "Network configuration.\n\nPlease configure the network from this shell.\n\nWhen you have finished, exit the shell with ^D or exit.\n");
1240 | Static (interface, address, netmask, gateway, nameserver) ->
1241 print_endline (s_ "Trying static network configuration.\n");
1242 if not (static_network
1243 (interface, address, netmask, gateway, nameserver)) then (
1244 print_endline (s_ "\nAuto-configuration failed. Starting a shell.\n\nPlease configure the network from this shell.\n\nWhen you have finished, exit the shell with ^D or exit.\n");
1250 (s_ "Trying network auto-configuration from root filesystem ...\n");
1252 (* Mount the root filesystem read-only under /mnt/root. *)
1253 sh ("mount -o ro " ^ quote (dev_of_partition rootfs) ^ " /mnt/root");
1255 if not (auto_network ()) then (
1256 print_endline (s_ "\nAuto-configuration failed. Starting a shell.\n\nPlease configure the network from this shell.\n\nWhen you have finished, exit the shell with ^D or exit.\n");
1260 (* NB. Lazy unmount is required because dhclient keeps its current
1261 * directory open on /etc/sysconfig/network-scripts/
1263 sh ("umount -l /mnt/root");
1266 print_endline (s_ "Trying QEMU network configuration.\n");
1269 | NoNetwork -> (* this is easy ... *) ()
1272 (* SSH configuration phase. *)
1276 match !config_ssh with
1279 (* Query the user for SSH configuration. *)
1280 open_centered_window ~stage:(s_ "SSH configuration")
1281 60 20 (s_ "SSH configuration");
1283 let label1 = Newt.label 1 1 (s_ "Remote host") in
1284 let host = Newt.entry 20 1 None 36 [] in
1285 let label2 = Newt.label 1 2 (s_ "Remote port") in
1286 let port = Newt.entry 20 2 (Some "22") 6 [] in
1287 let label3 = Newt.label 1 3 (s_ "Remote directory") in
1288 let dir = Newt.entry 20 3 (Some "/var/lib/xen/images") 36 [] in
1289 let label4 = Newt.label 1 4 (s_ "SSH username") in
1290 let user = Newt.entry 20 4 (Some "root") 16 [] in
1292 There's no sensible way to support this for SSH:
1293 let label5 = Newt.label 1 5 (s_ "SSH password") in
1294 let pass = Newt.entry 20 5 None 16 [Newt.PASSWORD] in
1298 Newt.checkbox 16 7 (s_ "Use SSH compression (not good for LANs)")
1302 Newt.checkbox 16 9 (s_ "Test SSH connection") '*' None in
1304 let ok = Newt.button 48 16 ok_button in
1306 let form = Newt.form None None [] in
1307 Newt.form_add_components form [label1;label2;label3;label4;
1314 ignore (Newt.run_form form);
1315 let host = Newt.entry_get_value host in
1316 let port = Newt.entry_get_value port in
1317 let dir = Newt.entry_get_value dir in
1318 let user = Newt.entry_get_value user in
1319 let compr = Newt.checkbox_get_value compr = '*' in
1320 let check = Newt.checkbox_get_value check = '*' in
1321 if host <> "" && port <> "" && user <> "" then
1322 { ssh_host = host; ssh_port = port; ssh_directory = dir;
1323 ssh_username = user;
1324 ssh_compression = compr;
1325 ssh_check = check; }
1335 (* If asked, check the SSH connection. *)
1336 if config_ssh.ssh_check then
1337 if not (test_ssh config_ssh) then
1338 failwith (s_ "SSH configuration failed");
1340 (* Devices and root partition and target configuration selection stage. *)
1341 let config_devices_to_send, config_root_filesystem, config_target =
1344 let config_devices_to_send =
1345 match !config_devices_to_send with
1348 let items = List.map (
1351 sprintf "/dev/%s (%.3f GB)" dev
1352 ((Int64.to_float size) /. (1024.*.1024.*.1024.)) in
1354 ) all_block_devices in
1356 select_multiple ~stage:(s_ "Block devices")
1358 (s_ "Select block devices to send")
1361 let config_root_filesystem =
1362 match !config_root_filesystem with
1365 let items = List.map (
1366 fun (part, nature) ->
1368 sprintf "%s %s" (dev_of_partition part)
1369 (string_of_nature nature) in
1373 select_single ~stage:(s_ "Root filesystem") 60
1374 (s_ "Select root filesystem")
1378 match !config_target with
1381 open_centered_window ~stage:(s_ "Target system") 40 20
1382 (s_ "Configure target system");
1384 let hvlabel = Newt.label 1 1 (s_ "Hypervisor:") in
1385 let hvlistbox = Newt.listbox 16 1 4 [Newt.SCROLL] in
1386 Newt.listbox_append_entry hvlistbox "Xen" (Some Xen);
1387 Newt.listbox_append_entry hvlistbox "QEMU" (Some QEMU);
1388 Newt.listbox_append_entry hvlistbox "KVM" (Some KVM);
1389 Newt.listbox_append_entry hvlistbox "Other" None;
1391 let archlabel = Newt.label 1 5 (s_ "Architecture:") in
1392 let archlistbox = Newt.listbox 16 5 4 [Newt.SCROLL] in
1393 Newt.listbox_append_entry archlistbox "i386" I386;
1394 Newt.listbox_append_entry archlistbox
1395 "x86-64 (64-bit x86)" X86_64;
1396 Newt.listbox_append_entry archlistbox "IA64 (Itanium)" IA64;
1397 Newt.listbox_append_entry archlistbox "PowerPC 32-bit" PPC;
1398 Newt.listbox_append_entry archlistbox "PowerPC 64-bit" PPC64;
1399 Newt.listbox_append_entry archlistbox "SPARC 32-bit" SPARC;
1400 Newt.listbox_append_entry archlistbox "SPARC 64-bit" SPARC64;
1401 Newt.listbox_append_entry archlistbox "Unknown/other" UnknownArch;
1403 (* Get the architecture of the selected root filesystem.
1404 * If not known, default to UnknownArch.
1406 Newt.listbox_set_current_by_key archlistbox UnknownArch;
1408 match List.assoc config_root_filesystem all_partitions with
1409 | LinuxRoot (arch, _) ->
1410 Newt.listbox_set_current_by_key archlistbox arch
1415 let memlabel = Newt.label 1 9 (s_ "Memory (MB):") in
1416 let mementry = Newt.entry 16 9
1417 (Some (string_of_int system_memory)) 8 [] in
1418 let cpulabel = Newt.label 1 10 (s_ "CPUs:") in
1419 let cpuentry = Newt.entry 16 10
1420 (Some (string_of_int system_nr_cpus)) 4 [] in
1421 let maclabel = Newt.label 1 11 (s_ "MAC addr:") in
1422 let macentry = Newt.entry 16 11 None 20 [] in
1424 Newt.label 1 12 (s_ "(leave MAC blank for random)") in
1427 Newt.checkbox 12 14 (s_ "Use remote libvirtd") '*' None in
1429 let ok = Newt.button 28 16 ok_button in
1431 let form = Newt.form None None [] in
1432 Newt.form_add_components form
1433 [hvlabel; Newt.component_of_listbox hvlistbox;
1434 archlabel; Newt.component_of_listbox archlistbox;
1437 maclabel; macentry; maclabel2;
1443 ignore (Newt.run_form form);
1445 let hv = Newt.listbox_get_current hvlistbox in
1446 let arch = Newt.listbox_get_current archlistbox in
1447 let mem = int_of_string (Newt.entry_get_value mementry) in
1448 let cpus = int_of_string (Newt.entry_get_value cpuentry) in
1449 let mac = Newt.entry_get_value macentry in
1450 let libvirtd = Newt.checkbox_get_value libvirtd = '*' in
1451 if hv <> None && arch <> None && mem >= 0 && cpus >= 0
1453 { tgt_hypervisor = Option.get hv;
1454 tgt_architecture = Option.get arch;
1455 tgt_memory = mem; tgt_vcpus = cpus;
1457 if mac <> "" then mac else random_mac_address ();
1458 tgt_libvirtd = libvirtd }
1462 Not_found | Failure "int_of_string" -> loop ()
1470 config_devices_to_send, config_root_filesystem, config_target
1473 (* If architecture is set to UnknownArch, then assume the same
1474 * architecture as the live CD.
1477 match config_target.tgt_architecture with
1479 let arch = shget "uname -m" in
1482 | Some (arch :: _) -> architecture_of_string arch
1483 | _ -> I386 (* probably wrong XXX *) in
1484 { config_target with tgt_architecture = arch }
1485 | _ -> config_target in
1487 (* Try to get the capabilities from the remote machine. If we fail
1488 * it doesn't matter too much.
1490 let caps_os_type, caps_emulator, caps_loader, caps_machine =
1492 if not config_target.tgt_libvirtd then raise Not_found;
1495 match config_target.tgt_hypervisor with
1496 | Some Xen -> "xen", "/"
1497 | Some (QEMU|KVM) -> "qemu", "/system"
1498 | None -> raise Not_found in
1500 sprintf "%s+ssh://%s@%s:%s%s"
1501 proto config_ssh.ssh_username
1502 config_ssh.ssh_host config_ssh.ssh_port path in
1503 eprintf "capabilities URI = %S\n%!" name;
1505 print_endline (s_ "Try to fetch remote hypervisor capabilities ...\n");
1507 let conn = Libvirt.Connect.connect_readonly ~name () in
1508 let caps = Libvirt.Connect.get_capabilities conn in
1509 Libvirt.Connect.close conn;
1511 (* Turn it into XML data. *)
1512 let caps = Xml.parse_string caps in
1513 eprintf "capabilities:\n%s\n%!" (Xml.to_string_fmt caps);
1515 (* We're looking for a guest with <os_type>hvm</os_type>
1516 * and <arch name="target-arch">... Later when we can
1517 * install PV drivers automatically, we will want to look
1518 * for paravirt guest types too.
1520 let guests = children_with_name "guest" caps in
1522 List.filter (xml_has_pcdata_child "os_type" "hvm") guests in
1523 let arch_str = string_of_architecture config_target.tgt_architecture in
1526 xml_has_child_matching (
1528 | Xml.Element (n, attribs, _)
1533 (* deal with i386 vs i686 pestilence *)
1534 architecture_of_string a = config_target.tgt_architecture
1541 (* In theory at this point we only have a single guest type
1542 * remaining. It might be that we have _zero_ available
1543 * guest types, which indicates probably an unsupported
1544 * capability of the remote hypervisor (or just that one of
1545 * many parsing or heuristics failed). It might be that
1546 * we have > 1 available guest types, which indicates some
1547 * feature we don't know about.
1549 let len = List.length guests in
1551 message_box (s_ "Warning")
1552 (sprintf (f_ "Remote hypervisor claims not to support fully virtualized %s guests.\n\nContinuing anyway.\n\n%!") arch_str);
1557 message_box (s_ "Note")
1558 (sprintf (f_ "Remote hypervisor supports multiple types of fully virtualized %s guests.\n\nPlease help further development of libvirt and virt-p2v by sending the file /tmp/virt-p2v.log back to the developers. See the main virt-p2v website for contact details.") arch_str)
1561 let guest = List.hd guests in
1564 try Some (find_pcdata_child "os_type" guest)
1565 with Not_found -> None in
1566 let arch_section = find_child_with_name "arch" guest in
1568 try Some (find_pcdata_child "emulator" arch_section)
1569 with Not_found -> None in
1571 try Some (find_pcdata_child "loader" arch_section)
1572 with Not_found -> None in
1574 try Some (find_pcdata_child "machine" arch_section)
1575 with Not_found -> None in
1577 os_type, emulator, loader, machine
1579 | Not_found -> None, None, None, None
1581 eprintf "XML error: %s\n%!" (Xml.error err);
1582 None, None, None, None
1583 | Xml.Not_element _ | Xml.Not_pcdata _ | Xml.No_attribute _ ->
1584 (* If these occur, need to add some more debugging. *)
1585 eprintf "XML error when parsing capabilities\n%!";
1586 None, None, None, None
1587 | Libvirt.Virterror err ->
1588 eprintf "libvirt error: %s\n%!" (Libvirt.Virterror.to_string err);
1589 None, None, None, None
1590 | Invalid_argument str ->
1591 eprintf "libvirt error: %s\n%!" str;
1592 None, None, None, None in
1594 (* In test mode, exit here before we do Bad Things to the developer's
1597 if test_dialog_stages then exit 1;
1599 print_endline (s_ "Performing LVM snapshots ...\n");
1601 (* Switch LVM config. *)
1603 putenv "LVM_SYSTEM_DIR" "/etc/lvm.new"; (* see lvm(8) *)
1604 sh "rm -f /etc/lvm/cache/.cache";
1605 sh "rm -f /etc/lvm.new/cache/.cache";
1607 (* Snapshot the block devices to send. *)
1608 let config_devices_to_send =
1611 let snapshot_dev = snapshot_name origin_dev in
1612 snapshot origin_dev snapshot_dev;
1613 (origin_dev, snapshot_dev)
1614 ) config_devices_to_send in
1616 (* Run kpartx on the snapshots. *)
1618 fun (origin, snapshot) ->
1619 shfailok ("kpartx -a " ^ quote ("/dev/mapper/" ^ snapshot))
1620 ) config_devices_to_send;
1622 (* Rescan for LVs. *)
1626 (* Mount the root filesystem under /mnt/root. *)
1627 (match config_root_filesystem with
1628 | Part (dev, partnum) ->
1629 let dev = dev ^ partnum in
1630 let snapshot_dev = snapshot_name dev in
1631 sh ("mount " ^ quote ("/dev/mapper/" ^ snapshot_dev) ^ " /mnt/root")
1634 (* The LV will be backed by a snapshot device, so just mount
1637 sh ("mount " ^ quote ("/dev/" ^ vg ^ "/" ^ lv) ^ " /mnt/root")
1640 (* Work out what devices will be called at the remote end. *)
1641 let config_devices_to_send = List.map (
1642 fun (origin_dev, snapshot_dev) ->
1643 let remote_dev = remote_of_origin_dev origin_dev in
1644 (origin_dev, snapshot_dev, remote_dev)
1645 ) config_devices_to_send in
1647 (* Modify files on the root filesystem. *)
1648 rewrite_fstab config_devices_to_send;
1649 (* XXX Other files to rewrite? *)
1651 (* Unmount the root filesystem and sync disks. *)
1652 sh "umount /mnt/root";
1653 sh "sync"; (* Ugh, should be in stdlib. *)
1655 (* XXX This is using the hostname derived from network configuration
1656 * above. We might want to ask the user to choose.
1658 let hostname = safe_name (gethostname ()) in
1660 let date = sprintf "%04d%02d%02d%02d%02d"
1661 (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min in
1662 "p2v-" ^ hostname ^ "-" ^ date in
1664 (* Work out what the image filenames will be at the remote end. *)
1665 let config_devices_to_send = List.map (
1666 fun (origin_dev, snapshot_dev, remote_dev) ->
1667 let remote_name = basename ^ "-" ^ remote_dev ^ ".img" in
1668 (origin_dev, snapshot_dev, remote_dev, remote_name)
1669 ) config_devices_to_send in
1671 (* Write a configuration file. Not sure if this is any better than
1672 * just 'sprintf-ing' bits of XML text together, but at least we will
1673 * always get well-formed XML.
1675 * XXX There is a case for using virt-install to generate this XML.
1676 * When we start to incorporate libvirt access & storage API this
1677 * needs to be rethought.
1679 let conf_filename = basename ^ ".conf" in
1682 (* Shortcut to make "<name>value</name>". *)
1683 let leaf name value = Xml.Element (name, [], [Xml.PCData value]) in
1684 (* ... and the _other_ sort of leaf (god I hate XML). *)
1685 let tleaf name attribs = Xml.Element (name, attribs, []) in
1688 string_of_architecture config_target.tgt_architecture in
1690 wordsize_of_architecture config_target.tgt_architecture in
1692 (* Standard stuff for every domain. *)
1693 let name = leaf "name" hostname in
1694 let uuid = leaf "uuid" (random_uuid ()) in
1695 let maxmem, memory =
1696 let m = string_of_int (config_target.tgt_memory * 1024) in
1697 leaf "maxmem" m, leaf "memory" m in
1698 let vcpu = leaf "vcpu" (string_of_int config_target.tgt_vcpus) in
1700 (* Top-level stuff which differs for each HV type (isn't this supposed
1701 * to be portable ...)
1704 (* Use capabilities for os_type, etc. else use some good guesses. *)
1705 let os_type = Option.default "hvm" caps_os_type in
1706 let machine = Option.default "pc" caps_machine in
1707 let loader = Option.default "/usr/lib/xen/boot/hvmloader" caps_loader in
1709 match config_target.tgt_hypervisor with
1711 [Xml.Element ("os", [],
1712 [leaf "type" os_type;
1713 leaf "loader" loader;
1714 tleaf "boot" ["dev", "hd"]]);
1715 Xml.Element ("features", [],
1719 tleaf "clock" ["sync", "localtime"]]
1721 [Xml.Element ("os", [], [leaf "type" os_type]);
1722 tleaf "clock" ["sync", "localtime"]]
1724 [Xml.Element ("os", [],
1725 [Xml.Element ("type",
1727 "machine", machine],
1728 [Xml.PCData os_type]);
1729 tleaf "boot" ["dev", "hd"]])]
1733 (* <devices> section. *)
1736 match caps_emulator with
1737 (* Use the emulator from the libvirt capabilities. *)
1738 | Some s -> [leaf "emulator" s]
1740 (* If we don't have libvirt capabilities, best guess. *)
1741 match config_target.tgt_hypervisor with
1744 (if arch_wordsize = W64 then "/usr/lib64/xen/bin/qemu-dm"
1745 else "/usr/lib/xen/bin/qemu-dm")]
1747 [leaf "emulator" "/usr/bin/qemu"]
1749 [leaf "emulator" "/usr/bin/qemu-kvm"]
1753 Xml.Element ("interface", ["type", "user"],
1754 [tleaf "mac" ["address",
1755 config_target.tgt_mac_address]]) in
1756 (* XXX should have an option for Xen bridging:
1758 "interface", ["type","bridge"],
1759 [tleaf "source" ["bridge","xenbr0"];
1760 tleaf "mac" ["address",mac_address];
1761 tleaf "script" ["path","vif-bridge"]])*)
1762 let graphics = tleaf "graphics" ["type", "vnc"] in
1764 let disks = List.map (
1765 fun (_, _, remote_dev, remote_name) ->
1767 "disk", ["type", "file";
1769 [tleaf "source" ["file",
1770 config_ssh.ssh_directory ^ "/" ^ remote_name];
1771 tleaf "target" ["dev", remote_dev]]
1773 ) config_devices_to_send in
1777 emulator @ interface :: graphics :: disks
1780 (* Put it all together in <domain type='foo'>. *)
1783 (match config_target.tgt_hypervisor with
1784 | Some Xen -> ["type", "xen"]
1785 | Some QEMU -> ["type", "qemu"]
1786 | Some KVM -> ["type", "kvm"]
1788 name :: uuid :: memory :: maxmem :: vcpu :: extras @ [devices]
1791 (* Convert XML configuration file to a string, then send it to the
1795 let xml = Xml.to_string_fmt xml in
1798 match config_target.tgt_hypervisor with
1799 | Some Xen | None -> ""
1800 | Some QEMU | Some KVM -> " -c qemu:///system" in
1801 let xml = sprintf (f_ "\
1803 This is an automatically generated libvirt configuration file.
1804 It was written by the %s program.
1806 Please check the values in this configuration file carefully,
1807 particularly maxmem, memory, vcpu and any paths.
1809 To start the domain, do:
1812 -->\n\n") program_name conn_arg conf_filename conn_arg hostname
1816 let xml_len = String.length xml in
1817 eprintf "length of configuration file is %d bytes\n%!" xml_len;
1819 print_endline (s_ "\nWriting configuration file ...\n");
1821 let (sock,_) as conn = ssh_start_upload config_ssh conf_filename in
1822 (* In OCaml this actually loops calling write(2) *)
1823 ignore (write sock xml 0 xml_len);
1824 ssh_finish_upload conn in
1826 (* Send the device snapshots to the remote host. *)
1827 (* XXX This code should be made more robust against both network
1828 * errors and local I/O errors. Also should allow the user several
1829 * attempts to connect, or let them go back to the dialog stage.
1832 fun (origin_dev, snapshot_dev, remote_dev, remote_name) ->
1833 eprintf "sending %s as %s\n%!" origin_dev remote_name;
1836 try List.assoc origin_dev all_block_devices
1837 with Not_found -> assert false (* internal error *) in
1840 printf (f_ "\nSending /dev/%s (%.3f GB) to remote machine\n\n%!")
1841 origin_dev ((Int64.to_float size) /. (1024.*.1024.*.1024.)) in
1843 (* Open the snapshot device. *)
1844 let fd = openfile ("/dev/mapper/" ^ snapshot_dev) [O_RDONLY] 0 in
1847 let (sock,_) as conn = ssh_start_upload config_ssh remote_name in
1849 (* Copy the data. *)
1850 let spinners = "|/-\\" (* "Oo" *) in
1851 let bufsize = 1024 * 1024 in
1852 let buffer = String.create bufsize in
1853 let start = gettimeofday () in
1855 let rec copy bytes_sent last_printed_at spinner =
1856 let n = read fd buffer 0 bufsize in
1858 let n' = write sock buffer 0 n in
1859 if n <> n' then assert false; (* never, according to the manual *)
1861 let bytes_sent = Int64.add bytes_sent (Int64.of_int n) in
1862 let last_printed_at, spinner =
1863 let now = gettimeofday () in
1864 (* Print progress every few seconds. *)
1865 if now -. last_printed_at > 2. then (
1866 let elapsed = Int64.to_float bytes_sent /. Int64.to_float size in
1867 let secs_elapsed = now -. start in
1868 printf "%.0f%% %c %.1f Mbps"
1869 (100. *. elapsed) spinners.[spinner]
1870 (Int64.to_float bytes_sent/.secs_elapsed/.1_000_000. *. 8.);
1871 (* After 60 seconds has elapsed, start printing estimates. *)
1872 if secs_elapsed >= 60. then (
1873 let remaining = 1. -. elapsed in
1874 let secs_remaining = (remaining /. elapsed) *. secs_elapsed in
1875 if secs_remaining > 120. then
1876 printf (f_ " (about %.0f minutes remaining)")
1877 (secs_remaining/.60.)
1879 printf (f_ " (about %.0f seconds remaining)")
1883 let spinner = (spinner + 1) mod String.length spinners in
1886 else last_printed_at, spinner in
1888 copy bytes_sent last_printed_at spinner
1892 printf "\n\n%!"; (* because of the messages printed above *)
1895 ssh_finish_upload conn
1896 ) config_devices_to_send;
1898 (*printf "\n\nPress any key ...\n%!"; ignore (read_line ());*)
1900 (* Clean up and reboot. *)
1902 message_box (sprintf (f_ "%s has finished") program_name)
1903 (sprintf (f_ "\nThe physical to virtual migration is complete.\n\nPlease verify the disk image(s) and configuration file on the remote host, and then start up the virtual machine by doing:\n\ncd %s\nvirsh define %s\n\nWhen you press [OK] this machine will reboot.")
1904 config_ssh.ssh_directory conf_filename)
1912 (*----------------------------------------------------------------------*)
1915 let () = eprintf (f_ "usage: virt-p2v [--test] [ttyname]\n%!") in
1918 (* Make sure that exceptions from 'main' get printed out on stdout
1919 * as well as stderr, since stderr is probably redirected to the
1920 * logfile, and so not visible to the user.
1922 let handle_exn f arg =
1925 print_endline (Printexc.to_string exn);
1928 (* Test harness for the Makefile. The Makefile invokes this script as
1929 * 'virt-p2v --test' just to check it compiles. When it is running
1930 * from the actual live CD, there is a single parameter which is the
1931 * tty name (so usually 'virt-p2v tty1').
1934 match Array.to_list Sys.argv with
1935 | [ _; ("--help"|"-help"|"-?"|"-h") ] -> usage ();
1936 | [ _; "--test" ] -> () (* Makefile test - do nothing. *)
1937 | [ _; ttyname ] -> (* Run main with ttyname. *)
1938 handle_exn main (Some ttyname)
1939 | [ _ ] -> (* Interactive - no ttyname. *)
1940 handle_exn main None
1943 (* This file must end with a newline *)