1 #!/usr/bin/ocamlrun /usr/bin/ocaml
3 (* virt-p2v is a script which performs a physical to
4 * virtual conversion of local disks.
6 * Copyright (C) 2007-2008 Red Hat Inc.
7 * Written by Richard W.M. Jones <rjones@redhat.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 | P2V (* physical to virtual *)
26 | V2V (* virtual to virtual *)
27 (*| V2P*) (* virtual to physical - not impl *)
29 | Part of string * string (* eg. "hda", "1" *)
30 | LV of string * string (* eg. "VolGroup00", "LogVol00" *)
32 | Auto of partition (* Automatic network configuration. *)
33 | Shell (* Start a shell. *)
34 | QEMUUserNet (* Assume we're running under qemu. *)
35 | Static of string * string * string * string * string
36 (* interface, address, netmask, gateway, nameserver *)
39 ssh_host : string; (* Remote host for SSH. *)
40 ssh_port : string; (* Remote port. *)
41 ssh_directory : string; (* Remote directory. *)
42 ssh_username : string; (* Remote username. *)
43 ssh_compression : bool; (* If true, use SSH compression. *)
44 ssh_check : bool; (* If true, check SSH is working. *)
51 | I386 | X86_64 | IA64 | PPC | PPC64 | SPARC | SPARC64
54 type target_config = {
55 tgt_hypervisor : hypervisor option; (* Remote hypervisor. *)
56 tgt_architecture : architecture; (* Remote architecture. *)
57 tgt_memory : int; (* Memory (megabytes). *)
58 tgt_vcpus : int; (* Number of virtual CPUs. *)
59 tgt_mac_address : string; (* MAC address. *)
60 tgt_libvirtd : bool; (* True if libvirtd on remote. *)
63 (*----------------------------------------------------------------------*)
64 (* TO MAKE A CUSTOM VIRT-P2V SCRIPT, adjust the defaults in this section.
66 * If left as they are, then this will create a generic virt-p2v script
67 * which asks the user for each question. If you set the defaults here
68 * then you will get a custom virt-p2v which is partially or even fully
69 * automated and won't ask the user any questions.
71 * Note that 'None' means 'no default' (ie. ask the user) whereas
72 * 'Some foo' means use 'foo' as the answer.
74 * These are documented in the virt-p2v(1) manual page.
76 * After changing them, run './virt-p2v --test' to check syntax.
79 (* If greeting is true, wait for keypress after boot and during
80 * final verification. Set to 'false' for less interactions.
82 let config_greeting = ref true
84 (* General type of transfer. *)
85 let config_transfer_type = ref None
87 (* Network configuration. *)
88 let config_network = ref None
90 (* SSH configuration. *)
91 let config_ssh = ref None
93 (* What to transfer. *)
94 let config_devices_to_send = ref None
96 (* The root filesystem - parts of this get modified after migration. *)
97 let config_root_filesystem = ref None
99 (* Configuration of the target. *)
100 let config_target = ref None
102 (* The name of the program as displayed in various places. *)
103 let program_name = "virt-p2v"
105 (* If you want to test the dialog stages, set this to true. *)
106 let test_dialog_stages = false
108 (* END OF CUSTOM virt-p2v SCRIPT SECTION. *)
109 (*----------------------------------------------------------------------*)
111 (* Load external libraries. *)
117 #require "xml-light";;
118 #require "gettext-stub";;
126 (*----------------------------------------------------------------------*)
129 * Use s_ "string" to mark a translatable string, and f_ "string %s"
130 * to mark a format string (eg. for printf). There are other
131 * functions: see ocaml-gettext manual and GNU gettext info.
133 * Try not to mark strings which always go to the log file (eg.
137 module P2VGettext = Gettext.Program (
139 let textdomain = "virt-p2v"
142 let dependencies = []
144 ) (GettextStub.Native)
147 let supported_langs =
148 (* Note these strings are NOT translated! *)
149 let nonasian_langs = [
150 "English", "en_US.UTF-8";
153 "\xE6\x97\xA5\xE6\x9C\xAC\xE8\xAA\x9E (Japanese)", "ja_JP.UTF-8"
155 (* Linux console doesn't support Asian or RTL languages. *)
156 let term = try getenv "TERM" with Not_found -> "" in
158 | "linux" -> nonasian_langs
159 | _ -> nonasian_langs @ asian_langs
161 (*----------------------------------------------------------------------*)
162 (* General helper functions. *)
164 let sort_uniq ?(cmp = compare) xs = (* sort and uniq a list *)
165 let xs = List.sort ~cmp xs in
166 let rec loop = function
167 | [] -> [] | [x] -> [x]
168 | x1 :: x2 :: xs when x1 = x2 -> loop (x1 :: xs)
169 | x :: xs -> x :: loop xs
173 let input_all_lines chan =
174 let lines = ref [] in
176 while true do lines := input_line chan :: !lines done; []
178 End_of_file -> List.rev !lines
180 let dev_of_partition = function
181 | Part (dev, partnum) -> sprintf "/dev/%s%s" dev partnum
182 | LV (vg, lv) -> sprintf "/dev/%s/%s" vg lv
184 let string_of_architecture = function
191 | SPARC64 -> "sparc64"
192 | OtherArch arch -> arch
195 let architecture_of_string = function
197 String.length str = 4 &&
198 (str.[0] = 'i' || str.[0] = 'I') &&
199 (str.[1] >= '3' && str.[1] <= '6') &&
200 str.[2] = '8' && str.[3] = '6' -> I386
201 | "x86_64" | "X86_64" | "x86-64" | "X86-64" -> X86_64
202 | "ia64" | "IA64" -> IA64
203 | "ppc" | "PPC" | "ppc32" | "PPC32" -> PPC
204 | "ppc64" | "PPC64" -> PPC64
205 | "sparc" | "SPARC" | "sparc32" | "SPARC32" -> SPARC
206 | "sparc64" | "SPARC64" -> SPARC64
208 | str -> OtherArch str
211 | W32 | W64 | WUnknown
213 let wordsize_of_architecture = function
221 | OtherArch arch -> WUnknown
222 | UnknownArch -> WUnknown
224 type nature = LinuxSwap
225 | LinuxRoot of architecture * linux_distro
226 | WindowsRoot (* Windows C: *)
227 | LinuxBoot (* Linux /boot *)
228 | NotRoot (* mountable, but not / or /boot *)
230 and linux_distro = RHEL of int * int
232 | Debian of int * int
235 let rec string_of_nature = function
236 | LinuxSwap -> s_ "Linux swap"
237 | LinuxRoot (architecture, distro) ->
238 string_of_linux_distro distro ^ " " ^ string_of_architecture architecture
239 | WindowsRoot -> s_ "Windows root"
240 | LinuxBoot -> s_ "Linux /boot"
241 | NotRoot -> s_ "Mountable non-root"
242 | UnknownNature -> s_ "Unknown partition type"
243 and string_of_linux_distro = function
244 | RHEL (a,b) -> sprintf "RHEL %d.%d" a b
245 | Fedora v -> sprintf "Fedora %d" v
246 | Debian (a,b) -> sprintf "Debian %d.%d" a b
247 | OtherLinux -> "Linux"
249 (* XML helper functions. *)
250 let rec children_with_name name xml =
251 let children = Xml.children xml in
254 | Xml.Element (n, _, _) when n = name -> true
257 and xml_has_pcdata_child name pcdata xml =
258 xml_has_child_matching (
260 | Xml.Element (n, _, [Xml.PCData pcd])
261 when n = name && pcd = pcdata -> true
264 and xml_has_attrib_child name attrib xml =
265 xml_has_child_matching (
267 | Xml.Element (n, attribs, _)
268 when n = name && List.mem attrib attribs -> true
271 and xml_has_child_matching f xml =
272 let children = Xml.children xml in
273 List.exists f children
274 and find_child_with_name name xml =
275 let children = children_with_name name xml in
277 | [] -> raise Not_found
279 and find_pcdata_child name xml =
280 let children = children_with_name name xml in
281 let rec loop = function
282 | [] -> raise Not_found
283 | Xml.Element (_, _, [Xml.PCData pcd]) :: _ -> pcd
288 type ('a, 'b) either = Either of 'a | Or of 'b
290 (* We go into and out of newt mode at various stages, but we might
291 * also need to put up a message at any time. This keeps track of
292 * whether we are in newt mode or not.
294 * General tip: Try to do any complex operations like setting up the
295 * network or probing disks outside newt mode, and try not to throw
296 * exceptions in newt mode.
298 let in_newt = ref false
300 if !in_newt then f ()
304 try Either (Newt.init_and_finish f)
305 with exn -> Or exn in
307 match r with Either r -> r | Or exn -> raise exn
310 (* Clear the screen, open a new centered window, make sure the background
311 * and help messages are consistent.
313 let open_centered_window ?stage width height title =
314 if not !in_newt then failwith (s_ "open_centered_window: not in newt mode");
316 Newt.centered_window width height title;
318 program_name ^ (match stage with
320 | Some stage -> " - " ^ stage) in
321 Newt.draw_root_text 0 0 root_text;
323 (s_ "F12 for next screen | [ALT] [F2] root / no password for shell")
325 let ok_button = " OK "
327 (* Some general dialog boxes. *)
328 let message_box title text =
331 open_centered_window 40 20 title;
333 let textbox = Newt.textbox 1 1 36 14 [Newt.WRAP; Newt.SCROLL] in
334 Newt.textbox_set_text textbox text;
335 let ok = Newt.button 28 16 ok_button in
336 let form = Newt.form None None [] in
337 Newt.form_add_components form [textbox; ok];
339 Newt.component_takes_focus ok true;
341 ignore (Newt.run_form form);
345 (* Fail and exit with error. *)
350 ^ 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
351 message_box (s_ "Error") text;
354 (* Display a dialog with checkboxes, return the multiple selected items. *)
355 let select_multiple ?stage ?(force_one = false) width title items =
358 open_centered_window ?stage width 20 title;
362 fun i (label, handle, selected) ->
364 Newt.checkbox 1 (i+1) label
365 (if selected then '*' else ' ') None in
369 let ok = Newt.button 48 16 ok_button in
372 if List.length entries > 10 then
373 Some (Newt.vertical_scrollbar 58 1 10
374 Newt_int.NEWT_COLORSET_WINDOW
375 Newt_int.NEWT_COLORSET_ACTCHECKBOX)
378 let form = Newt.form vb None [] in
379 Newt.form_add_components form (List.map snd entries);
380 Newt.form_add_component form ok;
384 ignore (Newt.run_form form);
385 let selected = List.filter_map (
387 if Newt.checkbox_get_value cb = '*' then Some handle else None
389 if force_one && selected = [] then loop ()
399 (* Display a dialog with radio buttons, return the single selected item. *)
400 let select_single ?stage width title items =
401 if items = [] then failwith "select_single: no items";
405 open_centered_window ?stage width 20 title;
407 let prev = ref None in
410 fun i (label, handle) ->
411 let rb = Newt.radio_button 1 (i+1) label (!prev = None) !prev in
416 let ok = Newt.button (width-12) 16 ok_button in
419 if List.length entries > 10 then
420 Some (Newt.vertical_scrollbar 58 1 10
421 Newt_int.NEWT_COLORSET_WINDOW
422 Newt_int.NEWT_COLORSET_ACTCHECKBOX)
425 let form = Newt.form vb None [] in
426 Newt.form_add_components form (List.map snd entries);
427 Newt.form_add_component form ok;
431 ignore (Newt.run_form form);
432 let r = Option.get !prev in
433 let r = Newt.radio_get_current r in
434 (* Now we compare 'r' to all the 'rb's in the list
435 * to see which one is selected.
438 List.find (fun (_, rb) -> Newt.component_equals r rb) entries
449 (* Shell-safe quoting function. In fact there's one in stdlib so use it. *)
450 let quote = Filename.quote
452 (* Run a shell command and check it returns 0. *)
454 eprintf "sh: %s\n%!" cmd;
455 if Sys.command cmd <> 0 then
456 failwith (sprintf (f_ "Command failed:\n\n%s") cmd)
459 eprintf "shfailok: %s\n%!" cmd;
460 ignore (Sys.command cmd)
462 let shwithstatus cmd =
463 eprintf "shwithstatus: %s\n%!" cmd;
466 (* Same as `cmd` in shell. Any error message will be in the logfile. *)
468 eprintf "shget: %s\n%!" cmd;
469 let chan = open_process_in cmd in
470 let lines = input_all_lines chan in
471 match close_process_in chan with
472 | WEXITED 0 -> Some lines (* command succeeded *)
473 | WEXITED _ -> None (* command failed *)
475 failwith (sprintf (f_ "shget: command killed by signal %d") i)
477 failwith (sprintf (f_ "shget: command stopped by signal %d") i)
479 (* Start an interactive shell. Need to juggle file descriptors a bit
480 * because bash write PS1 to stderr (currently directed to the logfile).
484 | 0 -> (* child, runs bash *)
487 (* Sys.command runs 'sh -c' which blows away PS1, so set it late. *)
489 Sys.command "PS1='\\u@\\h:\\w\\$ ' /bin/bash --norc --noprofile -i"
491 | _ -> (* parent, waits *)
492 eprintf "waiting for subshell to exit\n%!";
495 (* Some true if is dir/file, Some false if not, None if not found. *)
497 try Some ((stat path).st_kind = S_DIR)
498 with Unix_error (ENOENT, "stat", _) -> None
500 try Some ((stat path).st_kind = S_REG)
501 with Unix_error (ENOENT, "stat", _) -> None
503 (*----------------------------------------------------------------------*)
504 (* P2V-specific helper functions. *)
506 (* Generate a predictable safe name containing only letters, numbers
507 * and underscores. If passed a string with no letters or numbers,
508 * generates "_1", "_2", etc.
513 fun () -> incr i; "_" ^ string_of_int !i
516 let is_safe = function 'a'..'z'|'A'..'Z'|'0'..'9' -> true | _ -> false in
517 let name = String.copy name in
518 let have_safe = ref false in
519 for i = 0 to String.length name - 1 do
520 if not (is_safe name.[i]) then name.[i] <- '_' else have_safe := true
522 if !have_safe then name else next_anon ()
524 (* Parse the output of 'lvs' to get list of LV names, sizes,
525 * corresponding PVs, etc. Returns a list of (lvname, PVs, lvsize).
528 let devname = Pcre.regexp "^/dev/(.+)\\(.+\\)$" in
532 shget "lvs --noheadings -o vg_name,lv_name,devices,lv_size"
536 let lines = List.map Pcre.split lines in
539 | [vg; lv; pvs; lvsize]
540 | [_; vg; lv; pvs; lvsize] ->
541 let pvs = String.nsplit pvs "," in
542 let pvs = List.filter_map (
545 let subs = Pcre.exec ~rex:devname pv in
546 Some (Pcre.get_substring subs 1)
549 eprintf "lvs: unexpected device name: %s\n%!" pv;
552 LV (vg, lv), pvs, lvsize
554 failwith ("lvs: " ^ s_ "unexpected output: " ^
555 String.concat "," line)
558 (* Get the partitions on a block device.
559 * eg. "sda" -> [Part ("sda","1"); Part ("sda", "2")]
561 let get_partitions dev =
562 let rex = Pcre.regexp ("^" ^ dev ^ "(.+)$") in
563 let devdir = "/sys/block/" ^ dev in
564 let parts = Sys.readdir devdir in
565 let parts = Array.to_list parts in
566 let parts = List.filter (
567 fun name -> Some true = is_dir (devdir ^ "/" ^ name)
569 let parts = List.filter_map (
572 let subs = Pcre.exec ~rex part in
573 Some (Part (dev, Pcre.get_substring subs 1))
579 (* Generate snapshot device name from device name. *)
580 let snapshot_name dev =
581 "snap" ^ (safe_name dev)
583 (* Perform a device-mapper snapshot with ramdisk overlay. *)
585 let next_free_ram_disk =
587 fun () -> incr i; "/dev/ram" ^ string_of_int !i
589 fun origin_dev snapshot_dev ->
590 let ramdisk = next_free_ram_disk () in
592 let cmd = "blockdev --getsz " ^ quote ("/dev/" ^ origin_dev) in
593 let lines = shget cmd in
595 | Some (sectors::_) -> Int64.of_string sectors
597 failwith (sprintf (f_ "Disk snapshot failed: unable to read the size in sectors of block device %s") origin_dev) in
599 (* Create the snapshot origin device. Called, eg. snap_sda1_org *)
600 sh (sprintf "dmsetup create %s_org --table='0 %Ld snapshot-origin /dev/%s'"
601 snapshot_dev sectors origin_dev);
602 (* Create the snapshot. *)
603 sh (sprintf "dmsetup create %s --table='0 %Ld snapshot /dev/mapper/%s_org %s n 64'"
604 snapshot_dev sectors snapshot_dev ramdisk)
606 (* Try to perform automatic network configuration, assuming a Fedora or
607 * RHEL-like root filesystem mounted on /mnt/root.
609 let auto_network () =
610 (* Fedora gives an error if this file doesn't exist. *)
611 sh "touch /etc/resolv.conf";
613 (* NB. Lazy unmount is required because dhclient keeps its current
614 * directory open on /etc/sysconfig/network-scripts/
615 * (Fixed in dhcp >= 4.0.0 but be generous anyway).
617 sh "mount -o bind /mnt/root/etc /etc";
618 let status = shwithstatus "/etc/init.d/network start" in
621 (* Try to ping the default gateway to see if this worked. *)
622 shfailok "ping -c3 `/sbin/ip route list match 0.0.0.0 | head -1 | awk '{print $3}'`";
624 if !config_greeting then (
625 print_endline (s_ "\n\nDid automatic network configuration work?\nHint: If not sure, there is a shell on console [ALT] [F2]");
627 let line = read_line () in
628 String.length line > 0 && (line.[0] = 'y' || line.[0] = 'Y')
631 (* Non-interactive: return the status of /etc/init.d/network start. *)
634 (* Configure the network statically. *)
635 let static_network (interface, address, netmask, gateway, nameserver) =
636 let do_cmd_or_exit cmd = if shwithstatus cmd <> 0 then raise Exit in
638 do_cmd_or_exit (sprintf "ifconfig %s %s netmask %s"
639 (quote interface) (quote address) (quote netmask));
640 do_cmd_or_exit (sprintf "route add default gw %s %s"
641 (quote gateway) (quote interface));
642 if nameserver <> "" then
643 do_cmd_or_exit (sprintf "echo nameserver %s > /etc/resolv.conf"
647 Exit -> false (* failed *)
649 (* http://fabrice.bellard.free.fr/qemu/qemu-doc.html#SEC30 *)
650 let qemu_network () =
651 sh "ifconfig eth0 10.0.2.10 netmask 255.255.255.0";
652 sh "route add default gw 10.0.2.2 eth0";
653 sh "echo nameserver 10.0.2.3 > /etc/resolv.conf"
655 (* Map local device names to remote devices names. At the moment we
656 * just change sd* to hd* (as device names appear under fullvirt). In
657 * future, lots of complex possibilities.
659 let remote_of_origin_dev =
660 let devsd = Pcre.regexp "^sd([[:alpha:]]+[[:digit:]]*)$" in
661 let devsd_subst = Pcre.subst "hd$1" in
663 Pcre.replace ~rex:devsd ~itempl:devsd_subst dev
665 (* Make an SSH connection to the remote machine, execute command.
666 * The connection remains open until you call ssh_disconnect, it
667 * times out or there is some error.
669 * NB. The command is NOT quoted.
671 * Returns a pair (file descriptor, channel), both referring to the
672 * same thing. Use whichever is more convenient.
674 let ssh_connect config cmd =
675 let cmd = sprintf "ssh%s -l %s -p %s %s %s"
676 (if config.ssh_compression then " -C" else "")
677 (quote config.ssh_username) (quote config.ssh_port) (quote config.ssh_host)
679 eprintf "ssh_connect: %s\n%!" cmd;
680 let chan = open_process_out cmd in
681 descr_of_out_channel chan, chan
683 let ssh_disconnect (_, chan) =
684 eprintf "ssh_disconnect\n%!";
685 match close_process_out chan with
686 | WEXITED 0 -> () (* OK *)
687 | WEXITED i -> failwith (sprintf (f_ "ssh: exited with error code %d") i)
688 | WSIGNALED i -> failwith (sprintf (f_ "ssh: killed by signal %d") i)
689 | WSTOPPED i -> failwith (sprintf (f_ "ssh: stopped by signal %d") i)
691 (* Use these functions to upload a file. *)
692 let ssh_start_upload config filename =
694 sprintf "cat \\> %s/%s" (quote config.ssh_directory) (quote filename) in
695 ssh_connect config cmd
697 let ssh_finish_upload = ssh_disconnect
699 (* Test SSH connection. *)
700 let test_ssh config =
702 (s_ "Testing SSH connection by listing files in remote directory ...\n");
704 let cmd = sprintf "/bin/ls %s" (quote config.ssh_directory) in
705 let conn = ssh_connect config cmd in
708 if !config_greeting then (
709 print_endline (s_ "\n\nDid SSH work?\nHint: If not sure, there is a shell on console [ALT] [F2]\n");
711 let line = read_line () in
712 String.length line > 0 && (line.[0] = 'y' || line.[0] = 'Y')
717 (* Rewrite /mnt/root/etc/fstab. *)
718 let rewrite_fstab () =
719 let filename = "/mnt/root/etc/fstab" in
720 if is_file filename = Some true then (
721 sh ("cp " ^ quote filename ^ " " ^ quote (filename ^ ".p2vsaved"));
723 let chan = open_in filename in
724 let lines = input_all_lines chan in
726 let lines = List.map Pcre.split lines in
727 let lines = List.map (
729 | dev :: rest when String.starts_with dev "/dev/" ->
730 let dev = String.sub dev 5 (String.length dev - 5) in
731 let dev = remote_of_origin_dev dev in
732 let dev = "/dev/" ^ dev in
737 let chan = open_out filename in
740 | [dev; mountpoint; fstype; options; freq; passno] ->
741 fprintf chan "%-23s %-23s %-7s %-15s %s %s\n"
742 dev mountpoint fstype options freq passno
744 output_string chan (String.concat " " line);
745 output_char chan '\n'
750 (* Generate a random MAC address in the Xen-reserved space. *)
751 let random_mac_address () =
753 List.map (sprintf "%02x") (
754 List.map (fun _ -> Random.int 256) [0;0;0]
756 String.concat ":" ("00"::"16"::"3e"::random)
758 (* Generate a random UUID. *)
760 let hex = "0123456789abcdef" in
762 let str = String.create 32 in
763 for i = 0 to 31 do str.[i] <- hex.[Random.int 16] done;
766 (*----------------------------------------------------------------------*)
767 (* Main entry point. *)
769 (* The general plan for the main function is to operate in stages:
774 * Information gathering about the system
775 * | (eg. block devices, number of CPUs, etc.)
777 * Greeting and type of transfer question
781 * | (after this point we have a working network)
784 * | (after this point we have a working SSH connection)
786 * Questions about what to transfer (block devs, root fs) <--.
789 * Questions about hypervisor configuration |
792 * Verify information -------- user wants to change info ----/
797 * Prior versions of virt-p2v (the ones which used 'dialog') had support
798 * for a back button so they could go back through dialogs. I removed
799 * this because it was hard to support and not particularly useful.
802 let rec main ttyname =
805 (* Running from an init script. We don't have much of a
806 * login environment, so set one up.
810 ["/usr/sbin"; "/sbin"; "/usr/local/bin"; "/usr/kerberos/bin";
811 "/usr/bin"; "/bin"]);
812 putenv "HOME" "/root";
813 putenv "LOGNAME" "root";
815 (* We can safely write in /tmp (it's a synthetic live CD directory). *)
818 (* Set up logging to /tmp/virt-p2v.log. *)
819 let fd = openfile "virt-p2v.log" [ O_WRONLY; O_APPEND; O_CREAT ] 0o644 in
823 (* Log the start up time. *)
824 eprintf "\n\n**************************************************\n\n";
825 let tm = localtime (time ()) in
826 eprintf "%s starting up at %04d-%02d-%02d %02d:%02d:%02d\n\n%!"
828 (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min tm.tm_sec;
830 (* Connect stdin/stdout to the tty. *)
834 let fd = openfile ("/dev/" ^ ttyname) [ O_RDWR ] 0 in
840 (* Choose language early, so messages are translated. *)
841 if !config_greeting && List.length supported_langs > 1 then (
844 let lang = select_single ~stage:(s_ "Select language") 40
845 (s_ "Select language")
849 ignore (GettextStubCompat.setlocale GettextStubCompat.LC_ALL lang)
853 let () = printf (f_ "%s starting up ...\n%!") program_name in
855 (* Disable screen blanking on tty. *)
856 sh "setterm -blank 0";
858 (* Check that the environment is a sane-looking live CD. If not, bail. *)
859 if not test_dialog_stages && is_dir "/mnt/root" <> Some true then
861 (s_ "You should only run this script from the live CD or a USB key.");
863 (* Start of the information gathering phase. *)
865 (s_ "Detecting hard drives (this may take some time) ...");
867 (* Search for all non-removable block devices. Do this early and bail
868 * if we can't find anything.
870 * This is a list of strings, like "hda" and size in bytes.
872 let all_block_devices : (string * int64) list =
873 let rex = Pcre.regexp "^[hs]d" in
874 let devices = Array.to_list (Sys.readdir "/sys/block") in
875 let devices = List.sort devices in
876 let devices = List.filter (fun d -> Pcre.pmatch ~rex d) devices in
877 eprintf "all_block_devices: block devices: %s\n%!"
878 (String.concat "; " devices);
879 (* Run blockdev --getsize64 on each, and reject any where this fails
880 * (probably removable devices).
882 let devices = List.filter_map (
884 let cmd = "blockdev --getsize64 " ^ quote ("/dev/" ^ d) in
885 let lines = shget cmd in
887 | Some (blksize::_) -> Some (d, Int64.of_string blksize)
888 | Some [] | None -> None
890 eprintf "all_block_devices: non-removable block devices: %s\n%!"
892 (List.map (fun (d, b) -> sprintf "%s [%Ld]" d b) devices));
895 (s_ "No non-removable block devices (hard disks, etc.) could be found on this machine.");
898 (* Search for partitions and LVs (anything that could contain a
899 * filesystem directly). We refer to these generically as
902 let all_partitions : partition list =
905 let lvs = get_lvs () in
906 let pvs = List.map (fun (_, pvs, _) -> pvs) lvs in
907 let pvs = List.concat pvs in
908 let pvs = sort_uniq pvs in
909 eprintf "all_partitions: PVs: %s\n%!" (String.concat "; " pvs);
910 let lvs = List.map (fun (lvname, _, _) -> lvname) lvs in
911 eprintf "all_partitions: LVs: %s\n%!"
912 (String.concat "; " (List.map dev_of_partition lvs));
915 (* Partitions (eg. "sda1", "sda2"). *)
917 let parts = List.map fst all_block_devices in
918 let parts = List.map get_partitions parts in
919 let parts = List.concat parts in
920 eprintf "all_partitions: all partitions: %s\n%!"
921 (String.concat "; " (List.map dev_of_partition parts));
923 (* Remove any partitions which are PVs. *)
924 let parts = List.filter (
926 | Part (dev, partnum) -> not (List.mem (dev ^ partnum) pvs)
927 | LV _ -> assert false
930 eprintf "all_partitions: partitions after removing PVs: %s\n%!"
931 (String.concat "; " (List.map dev_of_partition parts));
933 (* Concatenate LVs & Parts *)
936 (* Run blockdev --getsize64 on each partition to get its size.
938 * Returns a list of partitions and their size in bytes.
940 let all_partitions : (partition * int64) list =
943 let cmd = "blockdev --getsize64 " ^ quote (dev_of_partition part) in
944 let lines = shget cmd in
946 | Some (blksize::_) -> Some (part, Int64.of_string blksize)
947 | Some [] | None -> None
950 (* Try to determine the nature of each partition.
951 * Root? Swap? Architecture? etc.
953 let all_partitions : (partition * (int64 * nature)) list =
954 (* Output of 'file' command for Linux swap file. *)
955 let swap = Pcre.regexp "Linux.*swap.*file" in
956 (* Contents of /etc/redhat-release. *)
957 let rhel = Pcre.regexp "(?:Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\\d+)(?:\\.(\\d+))?" in
958 let fedora = Pcre.regexp "Fedora.*release (\\d+)" in
959 (* Contents of /etc/debian_version. *)
960 let debian = Pcre.regexp "^(\\d+)\\.(\\d+)" in
961 (* Output of 'file' on certain executables. *)
962 let i386 = Pcre.regexp ", Intel 80386," in
963 let x86_64 = Pcre.regexp ", x86-64," in
964 let itanic = Pcre.regexp ", IA-64," in
966 (* Examine the filesystem mounted on 'mnt' to determine the
967 * operating system, and, if Linux, the distro.
970 if is_dir (mnt ^ "/Windows") = Some true &&
971 is_file (mnt ^ "/autoexec.bat") = Some true then
973 else if is_dir (mnt ^ "/etc") = Some true &&
974 is_dir (mnt ^ "/sbin") = Some true &&
975 is_dir (mnt ^ "/var") = Some true then (
976 if is_file (mnt ^ "/etc/redhat-release") = Some true then (
977 let chan = open_in (mnt ^ "/etc/redhat-release") in
978 let lines = input_all_lines chan in
982 | [] -> (* empty /etc/redhat-release ...? *)
983 LinuxRoot (UnknownArch, OtherLinux)
984 | line::_ -> (* try to detect OS from /etc/redhat-release *)
986 let subs = Pcre.exec ~rex:rhel line in
987 let major = int_of_string (Pcre.get_substring subs 1) in
989 try int_of_string (Pcre.get_substring subs 2)
990 with Not_found -> 0 in
991 LinuxRoot (UnknownArch, RHEL (major, minor))
993 Not_found | Failure "int_of_string" ->
995 let subs = Pcre.exec ~rex:fedora line in
996 let version = int_of_string (Pcre.get_substring subs 1) in
997 LinuxRoot (UnknownArch, Fedora version)
999 Not_found | Failure "int_of_string" ->
1000 LinuxRoot (UnknownArch, OtherLinux)
1002 else if is_file (mnt ^ "/etc/debian_version") = Some true then (
1003 let chan = open_in (mnt ^ "/etc/debian_version") in
1004 let lines = input_all_lines chan in
1008 | [] -> (* empty /etc/debian_version ...? *)
1009 LinuxRoot (UnknownArch, OtherLinux)
1010 | line::_ -> (* try to detect version from /etc/debian_version *)
1012 let subs = Pcre.exec ~rex:debian line in
1013 let major = int_of_string (Pcre.get_substring subs 1) in
1014 let minor = int_of_string (Pcre.get_substring subs 2) in
1015 LinuxRoot (UnknownArch, Debian (major, minor))
1017 Not_found | Failure "int_of_string" ->
1018 LinuxRoot (UnknownArch, OtherLinux)
1021 LinuxRoot (UnknownArch, OtherLinux)
1022 ) else if is_dir (mnt ^ "/grub") = Some true &&
1023 is_file (mnt ^ "/grub/stage1") = Some true then (
1026 NotRoot (* mountable, but not a root filesystem *)
1029 (* Examine the Linux root filesystem mounted on 'mnt' to
1030 * determine the architecture. We do this by looking at some
1031 * well-known binaries that we expect to be there.
1033 let detect_architecture mnt =
1034 let cmd = "file -bL " ^ quote (mnt ^ "/sbin/init") in
1035 match shget cmd with
1036 | Some (str::_) when Pcre.pmatch ~rex:i386 str -> I386
1037 | Some (str::_) when Pcre.pmatch ~rex:x86_64 str -> X86_64
1038 | Some (str::_) when Pcre.pmatch ~rex:itanic str -> IA64
1044 let dev = dev_of_partition part in (* Get /dev device. *)
1047 (* Use 'file' command to detect if it is swap. *)
1048 let cmd = "file -sbL " ^ quote dev in
1049 match shget cmd with
1050 | Some (str::_) when Pcre.pmatch ~rex:swap str -> LinuxSwap
1052 (* Blindly try to mount the device. *)
1053 let cmd = "mount -o ro " ^ quote dev ^ " /mnt/root" in
1054 match shwithstatus cmd with
1056 let os = detect_os "/mnt/root" in
1059 | LinuxRoot (UnknownArch, distro) ->
1060 let architecture = detect_architecture "/mnt/root" in
1061 LinuxRoot (architecture, distro)
1063 sh "umount /mnt/root";
1066 | _ -> UnknownNature (* not mountable *)
1070 eprintf "partition detection: %s is %s\n%!"
1071 dev (string_of_nature nature);
1073 (part, (size, nature))
1077 print_endline (s_ "Finished detecting hard drives.");
1079 (* Autodetect system memory. *)
1081 (* Try to parse dmesg first to find the 'Memory:' report when
1082 * the kernel booted. If available, this can give us an
1083 * indication of usable RAM on this system.
1085 let dmesg = shget "dmesg" in
1088 match dmesg with Some lines -> lines | None -> raise Not_found in
1090 List.find (fun line -> String.starts_with line "Memory: ") dmesg in
1091 let subs = Pcre.exec ~pat:"k/([[:digit:]]+)k available" line in
1092 let mem = Pcre.get_substring subs 1 in
1093 int_of_string mem / 1024
1095 Not_found | Failure "int_of_string" ->
1096 (* 'dmesg' can't be parsed. The backup plan is to look
1099 let mem = shget "head -1 /proc/meminfo | awk '{print $2/1024}'" in
1101 | Some (mem::_) -> int_of_float (float_of_string mem)
1103 (* For some reason even /proc/meminfo didn't work. Just
1104 * assume 256 MB instead.
1108 (* Autodetect system # pCPUs. *)
1109 let system_nr_cpus =
1111 shget "grep ^processor /proc/cpuinfo | tail -1 | awk '{print $3+1}'" in
1113 | Some (cpus::_) -> int_of_string cpus
1116 (* Greeting, type of transfer, network question stages.
1117 * These are all done in newt mode.
1119 let config_transfer_type, config_network =
1123 if !config_greeting then
1124 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);
1126 (* Type of transfer. *)
1127 let config_transfer_type =
1128 match !config_transfer_type with
1132 s_ "Physical to Virtual (P2V)", P2V;
1133 s_ "Virtual to Virtual (V2V)", V2V;
1136 select_single ~stage:(s_ "Transfer type") 40
1137 (s_ "Transfer type")
1140 (* Network configuration. *)
1141 let config_network =
1142 match !config_network with
1145 open_centered_window ~stage:(s_ "Network")
1146 60 20 (s_ "Configure network");
1148 let autolist = Newt.listbox 4 2 4 [Newt.SCROLL] in
1149 Newt.listbox_set_width autolist 52;
1151 (* Populate the "Automatic" listbox with RHEL/Fedora
1152 * root partitions found which allow us to do
1153 * automatic configuration in a known way.
1155 let rec loop = function
1157 | (partition, (_, LinuxRoot (_, ((RHEL _|Fedora _) as distro))))
1161 (dev_of_partition partition)
1162 (string_of_linux_distro distro) in
1163 ignore (Newt.listbox_append_entry autolist label partition);
1165 | _ :: parts -> loop parts
1167 loop all_partitions;
1169 (* If there is no suitable root partition (the listbox
1170 * is empty) then disable the auto option and the listbox.
1172 let no_auto = Newt.listbox_item_count autolist = 0 in
1175 Newt.radio_button 1 1
1176 (s_ "Automatic from:") (not no_auto) None in
1178 Newt.radio_button 1 6
1179 (s_ "Start a shell") no_auto (Some auto) in
1182 Newt.component_takes_focus auto false;
1183 Newt.component_takes_focus
1184 (Newt.component_of_listbox autolist) false
1188 Newt.radio_button 1 7
1189 (s_ "QEMU user network") false (Some shell) in
1191 Newt.radio_button 1 8
1192 (s_ "Don't configure the network") false (Some qemu) in
1194 Newt.radio_button 1 9
1195 (s_ "Static configuration:") false (Some nonet) in
1197 let label1 = Newt.label 4 10 (s_ "Interface") in
1198 let entry1 = Newt.entry 16 10 (Some "eth0") 8 [] in
1199 let label2 = Newt.label 4 11 (s_ "IP") in
1200 let entry2 = Newt.entry 16 11 None 16 [] in
1201 let label3 = Newt.label 4 12 (s_ "Netmask") in
1202 let entry3 = Newt.entry 16 12 (Some "255.255.255.0") 16 [] in
1203 let label4 = Newt.label 4 13 (s_ "Gateway") in
1204 let entry4 = Newt.entry 16 13 None 16 [] in
1205 let label5 = Newt.label 4 14 (s_ "Nameserver") in
1206 let entry5 = Newt.entry 16 14 None 16 [] in
1208 let enable_static () =
1209 Newt.component_takes_focus entry1 true;
1210 Newt.component_takes_focus entry2 true;
1211 Newt.component_takes_focus entry3 true;
1212 Newt.component_takes_focus entry4 true;
1213 Newt.component_takes_focus entry5 true
1216 let disable_static () =
1217 Newt.component_takes_focus entry1 false;
1218 Newt.component_takes_focus entry2 false;
1219 Newt.component_takes_focus entry3 false;
1220 Newt.component_takes_focus entry4 false;
1221 Newt.component_takes_focus entry5 false
1224 let enable_autolist () =
1225 Newt.component_takes_focus
1226 (Newt.component_of_listbox autolist) true
1228 let disable_autolist () =
1229 Newt.component_takes_focus
1230 (Newt.component_of_listbox autolist) false
1234 Newt.component_add_callback auto
1235 (fun () ->disable_static (); enable_autolist ());
1236 Newt.component_add_callback shell
1237 (fun () -> disable_static (); disable_autolist ());
1238 Newt.component_add_callback qemu
1239 (fun () -> disable_static (); disable_autolist ());
1240 Newt.component_add_callback nonet
1241 (fun () -> disable_static (); disable_autolist ());
1242 Newt.component_add_callback static
1243 (fun () -> enable_static (); disable_autolist ());
1245 let ok = Newt.button 48 16 ok_button in
1247 let form = Newt.form None None [] in
1248 Newt.form_add_components form [auto;
1249 Newt.component_of_listbox autolist;
1250 shell;qemu;nonet;static;
1251 label1;label2;label3;label4;label5;
1252 entry1;entry2;entry3;entry4;entry5;
1257 ignore (Newt.run_form form);
1259 let r = Newt.radio_get_current auto in
1260 if Newt.component_equals r auto then (
1261 match Newt.listbox_get_current autolist with
1263 | Some part -> Auto part
1265 else if Newt.component_equals r shell then Shell
1266 else if Newt.component_equals r qemu then QEMUUserNet
1267 else if Newt.component_equals r nonet then NoNetwork
1268 else if Newt.component_equals r static then (
1269 let interface = Newt.entry_get_value entry1 in
1270 let address = Newt.entry_get_value entry2 in
1271 let netmask = Newt.entry_get_value entry3 in
1272 let gateway = Newt.entry_get_value entry4 in
1273 let nameserver = Newt.entry_get_value entry5 in
1274 if interface = "" || address = "" ||
1275 netmask = "" || gateway = "" then
1278 Static (interface, address, netmask, gateway, nameserver)
1287 config_transfer_type, config_network
1290 (* Try to bring up the network. *)
1291 (match config_network with
1293 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");
1296 | Static (interface, address, netmask, gateway, nameserver) ->
1297 print_endline (s_ "Trying static network configuration.\n");
1298 if not (static_network
1299 (interface, address, netmask, gateway, nameserver)) then (
1300 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");
1306 (s_ "Trying network auto-configuration from root filesystem ...\n");
1308 (* Mount the root filesystem read-only under /mnt/root. *)
1309 sh ("mount -o ro " ^ quote (dev_of_partition rootfs) ^ " /mnt/root");
1311 if not (auto_network ()) then (
1312 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");
1316 (* NB. Lazy unmount is required because dhclient keeps its current
1317 * directory open on /etc/sysconfig/network-scripts/
1319 sh ("umount -l /mnt/root");
1322 print_endline (s_ "Trying QEMU network configuration.\n");
1325 | NoNetwork -> (* this is easy ... *) ()
1328 (* SSH configuration phase. *)
1332 match !config_ssh with
1335 (* Query the user for SSH configuration. *)
1336 open_centered_window ~stage:(s_ "SSH configuration")
1337 60 20 (s_ "SSH configuration");
1339 let label1 = Newt.label 1 1 (s_ "Remote host") in
1340 let host = Newt.entry 20 1 None 36 [] in
1341 let label2 = Newt.label 1 2 (s_ "Remote port") in
1342 let port = Newt.entry 20 2 (Some "22") 6 [] in
1343 let label3 = Newt.label 1 3 (s_ "Remote directory") in
1344 let dir = Newt.entry 20 3 (Some "/var/lib/xen/images") 36 [] in
1345 let label4 = Newt.label 1 4 (s_ "SSH username") in
1346 let user = Newt.entry 20 4 (Some "root") 16 [] in
1348 There's no sensible way to support this for SSH:
1349 let label5 = Newt.label 1 5 (s_ "SSH password") in
1350 let pass = Newt.entry 20 5 None 16 [Newt.PASSWORD] in
1354 Newt.checkbox 16 7 (s_ "Use SSH compression (not good for LANs)")
1358 Newt.checkbox 16 9 (s_ "Test SSH connection") '*' None in
1360 let ok = Newt.button 48 16 ok_button in
1362 let form = Newt.form None None [] in
1363 Newt.form_add_components form [label1;label2;label3;label4;
1370 ignore (Newt.run_form form);
1371 let host = Newt.entry_get_value host in
1372 let port = Newt.entry_get_value port in
1373 let dir = Newt.entry_get_value dir in
1374 let user = Newt.entry_get_value user in
1375 let compr = Newt.checkbox_get_value compr = '*' in
1376 let check = Newt.checkbox_get_value check = '*' in
1377 if host <> "" && port <> "" && user <> "" then
1378 { ssh_host = host; ssh_port = port; ssh_directory = dir;
1379 ssh_username = user;
1380 ssh_compression = compr;
1381 ssh_check = check; }
1391 (* If asked, check the SSH connection. *)
1392 if config_ssh.ssh_check then
1393 if not (test_ssh config_ssh) then
1394 failwith (s_ "SSH configuration failed");
1396 (* Devices and root partition and target configuration selection stage. *)
1397 let config_devices_to_send, config_root_filesystem, config_target =
1400 let config_devices_to_send =
1401 match !config_devices_to_send with
1404 let items = List.map (
1407 sprintf "/dev/%s (%.3f GB)" dev
1408 ((Int64.to_float size) /. (1024.*.1024.*.1024.)) in
1410 ) all_block_devices in
1412 select_multiple ~stage:(s_ "Block devices")
1414 (s_ "Select block devices to send")
1417 let config_root_filesystem =
1418 match !config_root_filesystem with
1421 let items = List.map (
1422 fun (part, (_, nature)) ->
1424 sprintf "%s %s" (dev_of_partition part)
1425 (string_of_nature nature) in
1429 select_single ~stage:(s_ "Root filesystem") 60
1430 (s_ "Select root filesystem")
1434 match !config_target with
1437 open_centered_window ~stage:(s_ "Target system") 40 20
1438 (s_ "Configure target system");
1440 let hvlabel = Newt.label 1 1 (s_ "Hypervisor:") in
1441 let hvlistbox = Newt.listbox 16 1 4 [Newt.SCROLL] in
1442 Newt.listbox_append_entry hvlistbox "Xen" (Some Xen);
1443 Newt.listbox_append_entry hvlistbox "QEMU" (Some QEMU);
1444 Newt.listbox_append_entry hvlistbox "KVM" (Some KVM);
1445 Newt.listbox_append_entry hvlistbox "Other" None;
1447 let archlabel = Newt.label 1 5 (s_ "Architecture:") in
1448 let archlistbox = Newt.listbox 16 5 4 [Newt.SCROLL] in
1449 Newt.listbox_append_entry archlistbox "i386" I386;
1450 Newt.listbox_append_entry archlistbox
1451 "x86-64 (64-bit x86)" X86_64;
1452 Newt.listbox_append_entry archlistbox "IA64 (Itanium)" IA64;
1453 Newt.listbox_append_entry archlistbox "PowerPC 32-bit" PPC;
1454 Newt.listbox_append_entry archlistbox "PowerPC 64-bit" PPC64;
1455 Newt.listbox_append_entry archlistbox "SPARC 32-bit" SPARC;
1456 Newt.listbox_append_entry archlistbox "SPARC 64-bit" SPARC64;
1457 Newt.listbox_append_entry archlistbox "Unknown/other" UnknownArch;
1459 (* Get the architecture of the selected root filesystem.
1460 * If not known, default to UnknownArch.
1462 Newt.listbox_set_current_by_key archlistbox UnknownArch;
1464 match List.assoc config_root_filesystem all_partitions with
1465 | _, LinuxRoot (arch, _) ->
1466 Newt.listbox_set_current_by_key archlistbox arch
1471 let memlabel = Newt.label 1 9 (s_ "Memory (MB):") in
1472 let mementry = Newt.entry 16 9
1473 (Some (string_of_int system_memory)) 8 [] in
1474 let cpulabel = Newt.label 1 10 (s_ "CPUs:") in
1475 let cpuentry = Newt.entry 16 10
1476 (Some (string_of_int system_nr_cpus)) 4 [] in
1477 let maclabel = Newt.label 1 11 (s_ "MAC addr:") in
1478 let macentry = Newt.entry 16 11 None 20 [] in
1480 Newt.label 1 12 (s_ "(leave MAC blank for random)") in
1483 Newt.checkbox 12 14 (s_ "Use remote libvirtd") '*' None in
1485 let ok = Newt.button 28 16 ok_button in
1487 let form = Newt.form None None [] in
1488 Newt.form_add_components form
1489 [hvlabel; Newt.component_of_listbox hvlistbox;
1490 archlabel; Newt.component_of_listbox archlistbox;
1493 maclabel; macentry; maclabel2;
1499 ignore (Newt.run_form form);
1501 let hv = Newt.listbox_get_current hvlistbox in
1502 let arch = Newt.listbox_get_current archlistbox in
1503 let mem = int_of_string (Newt.entry_get_value mementry) in
1504 let cpus = int_of_string (Newt.entry_get_value cpuentry) in
1505 let mac = Newt.entry_get_value macentry in
1506 let libvirtd = Newt.checkbox_get_value libvirtd = '*' in
1507 if hv <> None && arch <> None && mem >= 0 && cpus >= 0
1509 { tgt_hypervisor = Option.get hv;
1510 tgt_architecture = Option.get arch;
1511 tgt_memory = mem; tgt_vcpus = cpus;
1513 if mac <> "" then mac else random_mac_address ();
1514 tgt_libvirtd = libvirtd }
1518 Not_found | Failure "int_of_string" -> loop ()
1526 config_devices_to_send, config_root_filesystem, config_target
1529 (* If architecture is set to UnknownArch, then assume the same
1530 * architecture as the live CD.
1533 match config_target.tgt_architecture with
1535 let arch = shget "uname -m" in
1538 | Some (arch :: _) -> architecture_of_string arch
1539 | _ -> I386 (* probably wrong XXX *) in
1540 { config_target with tgt_architecture = arch }
1541 | _ -> config_target in
1543 (* Try to get the capabilities from the remote machine. If we fail
1544 * it doesn't matter too much.
1546 let caps_os_type, caps_emulator, caps_loader, caps_machine =
1548 if not config_target.tgt_libvirtd then raise Not_found;
1551 match config_target.tgt_hypervisor with
1552 | Some Xen -> "xen", "/"
1553 | Some (QEMU|KVM) -> "qemu", "/system"
1554 | None -> raise Not_found in
1556 sprintf "%s+ssh://%s@%s:%s%s"
1557 proto config_ssh.ssh_username
1558 config_ssh.ssh_host config_ssh.ssh_port path in
1559 eprintf "capabilities URI = %S\n%!" name;
1561 print_endline (s_ "Try to fetch remote hypervisor capabilities ...\n");
1563 let conn = Libvirt.Connect.connect_readonly ~name () in
1564 let caps = Libvirt.Connect.get_capabilities conn in
1565 Libvirt.Connect.close conn;
1567 (* Turn it into XML data. *)
1568 let caps = Xml.parse_string caps in
1569 eprintf "capabilities:\n%s\n%!" (Xml.to_string_fmt caps);
1571 (* We're looking for a guest with <os_type>hvm</os_type>
1572 * and <arch name="target-arch">... Later when we can
1573 * install PV drivers automatically, we will want to look
1574 * for paravirt guest types too.
1576 let guests = children_with_name "guest" caps in
1578 List.filter (xml_has_pcdata_child "os_type" "hvm") guests in
1579 let arch_str = string_of_architecture config_target.tgt_architecture in
1582 xml_has_child_matching (
1584 | Xml.Element (n, attribs, _)
1589 (* deal with i386 vs i686 pestilence *)
1590 architecture_of_string a = config_target.tgt_architecture
1597 (* In theory at this point we only have a single guest type
1598 * remaining. It might be that we have _zero_ available
1599 * guest types, which indicates probably an unsupported
1600 * capability of the remote hypervisor (or just that one of
1601 * many parsing or heuristics failed). It might be that
1602 * we have > 1 available guest types, which indicates some
1603 * feature we don't know about.
1605 let len = List.length guests in
1607 message_box (s_ "Warning")
1608 (sprintf (f_ "Remote hypervisor claims not to support fully virtualized %s guests.\n\nContinuing anyway.\n\n%!") arch_str);
1613 message_box (s_ "Note")
1614 (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)
1617 let guest = List.hd guests in
1620 try Some (find_pcdata_child "os_type" guest)
1621 with Not_found -> None in
1622 let arch_section = find_child_with_name "arch" guest in
1624 try Some (find_pcdata_child "emulator" arch_section)
1625 with Not_found -> None in
1627 try Some (find_pcdata_child "loader" arch_section)
1628 with Not_found -> None in
1630 try Some (find_pcdata_child "machine" arch_section)
1631 with Not_found -> None in
1633 os_type, emulator, loader, machine
1635 | Not_found -> None, None, None, None
1637 eprintf "XML error: %s\n%!" (Xml.error err);
1638 None, None, None, None
1639 | Xml.Not_element _ | Xml.Not_pcdata _ | Xml.No_attribute _ ->
1640 (* If these occur, need to add some more debugging. *)
1641 eprintf "XML error when parsing capabilities\n%!";
1642 None, None, None, None
1643 | Libvirt.Virterror err ->
1644 eprintf "libvirt error: %s\n%!" (Libvirt.Virterror.to_string err);
1645 None, None, None, None
1646 | Invalid_argument str ->
1647 eprintf "libvirt error: %s\n%!" str;
1648 None, None, None, None in
1650 (* In test mode, exit here before we do Bad Things to the developer's
1653 if test_dialog_stages then exit 1;
1655 print_endline (s_ "Performing LVM snapshots ...\n");
1657 (* Switch LVM config. *)
1659 putenv "LVM_SYSTEM_DIR" "/etc/lvm.new"; (* see lvm(8) *)
1660 sh "rm -f /etc/lvm/cache/.cache";
1661 sh "rm -f /etc/lvm.new/cache/.cache";
1663 (* Snapshot the block devices to send. *)
1664 let config_devices_to_send =
1667 let snapshot_dev = snapshot_name origin_dev in
1668 snapshot origin_dev snapshot_dev;
1669 (origin_dev, snapshot_dev)
1670 ) config_devices_to_send in
1672 (* Run kpartx on the snapshots. *)
1674 fun (origin, snapshot) ->
1675 shfailok ("kpartx -a " ^ quote ("/dev/mapper/" ^ snapshot))
1676 ) config_devices_to_send;
1678 (* Rescan for LVs. *)
1682 (* Mount the root filesystem under /mnt/root. *)
1683 (match config_root_filesystem with
1684 | Part (dev, partnum) ->
1685 let dev = dev ^ partnum in
1686 let snapshot_dev = snapshot_name dev in
1687 sh ("mount " ^ quote ("/dev/mapper/" ^ snapshot_dev) ^ " /mnt/root")
1690 (* The LV will be backed by a snapshot device, so just mount
1693 sh ("mount " ^ quote ("/dev/" ^ vg ^ "/" ^ lv) ^ " /mnt/root")
1696 (* Work out what devices will be called at the remote end. *)
1697 let config_devices_to_send = List.map (
1698 fun (origin_dev, snapshot_dev) ->
1699 let remote_dev = remote_of_origin_dev origin_dev in
1700 (origin_dev, snapshot_dev, remote_dev)
1701 ) config_devices_to_send in
1703 (* Modify files on the root filesystem. *)
1705 (* XXX Other files to rewrite? *)
1707 (* Unmount the root filesystem and sync disks. *)
1708 sh "umount /mnt/root";
1709 sh "sync"; (* Ugh, should be in stdlib. *)
1711 (* XXX This is using the hostname derived from network configuration
1712 * above. We might want to ask the user to choose.
1714 let hostname = safe_name (gethostname ()) in
1716 let date = sprintf "%04d%02d%02d%02d%02d"
1717 (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min in
1718 "p2v-" ^ hostname ^ "-" ^ date in
1720 (* Work out what the image filenames will be at the remote end. *)
1721 let config_devices_to_send = List.map (
1722 fun (origin_dev, snapshot_dev, remote_dev) ->
1723 let remote_name = basename ^ "-" ^ remote_dev ^ ".img" in
1724 (origin_dev, snapshot_dev, remote_dev, remote_name)
1725 ) config_devices_to_send in
1727 (* Write a configuration file. Not sure if this is any better than
1728 * just 'sprintf-ing' bits of XML text together, but at least we will
1729 * always get well-formed XML.
1731 * XXX There is a case for using virt-install to generate this XML.
1732 * When we start to incorporate libvirt access & storage API this
1733 * needs to be rethought.
1735 let conf_filename = basename ^ ".conf" in
1738 (* Shortcut to make "<name>value</name>". *)
1739 let leaf name value = Xml.Element (name, [], [Xml.PCData value]) in
1740 (* ... and the _other_ sort of leaf (god I hate XML). *)
1741 let tleaf name attribs = Xml.Element (name, attribs, []) in
1744 string_of_architecture config_target.tgt_architecture in
1746 wordsize_of_architecture config_target.tgt_architecture in
1748 (* Standard stuff for every domain. *)
1749 let name = leaf "name" hostname in
1750 let uuid = leaf "uuid" (random_uuid ()) in
1751 let maxmem, memory =
1752 let m = string_of_int (config_target.tgt_memory * 1024) in
1753 leaf "maxmem" m, leaf "memory" m in
1754 let vcpu = leaf "vcpu" (string_of_int config_target.tgt_vcpus) in
1756 (* Top-level stuff which differs for each HV type (isn't this supposed
1757 * to be portable ...)
1760 (* Use capabilities for os_type, etc. else use some good guesses. *)
1761 let os_type = Option.default "hvm" caps_os_type in
1762 let machine = Option.default "pc" caps_machine in
1763 let loader = Option.default "/usr/lib/xen/boot/hvmloader" caps_loader in
1765 match config_target.tgt_hypervisor with
1767 [Xml.Element ("os", [],
1768 [leaf "type" os_type;
1769 leaf "loader" loader;
1770 tleaf "boot" ["dev", "hd"]]);
1771 Xml.Element ("features", [],
1775 tleaf "clock" ["sync", "localtime"]]
1777 [Xml.Element ("os", [], [leaf "type" os_type]);
1778 tleaf "clock" ["sync", "localtime"]]
1780 [Xml.Element ("os", [],
1781 [Xml.Element ("type",
1783 "machine", machine],
1784 [Xml.PCData os_type]);
1785 tleaf "boot" ["dev", "hd"]])]
1789 (* <devices> section. *)
1792 match caps_emulator with
1793 (* Use the emulator from the libvirt capabilities. *)
1794 | Some s -> [leaf "emulator" s]
1796 (* If we don't have libvirt capabilities, best guess. *)
1797 match config_target.tgt_hypervisor with
1800 (if arch_wordsize = W64 then "/usr/lib64/xen/bin/qemu-dm"
1801 else "/usr/lib/xen/bin/qemu-dm")]
1803 [leaf "emulator" "/usr/bin/qemu"]
1805 [leaf "emulator" "/usr/bin/qemu-kvm"]
1809 Xml.Element ("interface", ["type", "user"],
1810 [tleaf "mac" ["address",
1811 config_target.tgt_mac_address]]) in
1812 (* XXX should have an option for Xen bridging:
1814 "interface", ["type","bridge"],
1815 [tleaf "source" ["bridge","xenbr0"];
1816 tleaf "mac" ["address",mac_address];
1817 tleaf "script" ["path","vif-bridge"]])*)
1818 let graphics = tleaf "graphics" ["type", "vnc"] in
1820 let disks = List.map (
1821 fun (_, _, remote_dev, remote_name) ->
1823 "disk", ["type", "file";
1825 [tleaf "source" ["file",
1826 config_ssh.ssh_directory ^ "/" ^ remote_name];
1827 tleaf "target" ["dev", remote_dev]]
1829 ) config_devices_to_send in
1833 emulator @ interface :: graphics :: disks
1836 (* Put it all together in <domain type='foo'>. *)
1839 (match config_target.tgt_hypervisor with
1840 | Some Xen -> ["type", "xen"]
1841 | Some QEMU -> ["type", "qemu"]
1842 | Some KVM -> ["type", "kvm"]
1844 name :: uuid :: memory :: maxmem :: vcpu :: extras @ [devices]
1847 (* Convert XML configuration file to a string, then send it to the
1851 let xml = Xml.to_string_fmt xml in
1854 match config_target.tgt_hypervisor with
1855 | Some Xen | None -> ""
1856 | Some QEMU | Some KVM -> " -c qemu:///system" in
1857 let xml = sprintf (f_ "\
1859 This is an automatically generated libvirt configuration file.
1860 It was written by the %s program.
1862 Please check the values in this configuration file carefully,
1863 particularly maxmem, memory, vcpu and any paths.
1865 To start the domain, do:
1868 -->\n\n") program_name conn_arg conf_filename conn_arg hostname
1872 let xml_len = String.length xml in
1873 eprintf "length of configuration file is %d bytes\n%!" xml_len;
1875 print_endline (s_ "\nWriting configuration file ...\n");
1877 let (sock,_) as conn = ssh_start_upload config_ssh conf_filename in
1878 (* In OCaml this actually loops calling write(2) *)
1879 ignore (write sock xml 0 xml_len);
1880 ssh_finish_upload conn in
1882 (* Send the device snapshots to the remote host. *)
1883 (* XXX This code should be made more robust against both network
1884 * errors and local I/O errors. Also should allow the user several
1885 * attempts to connect, or let them go back to the dialog stage.
1888 fun (origin_dev, snapshot_dev, remote_dev, remote_name) ->
1889 eprintf "sending %s as %s\n%!" origin_dev remote_name;
1892 try List.assoc origin_dev all_block_devices
1893 with Not_found -> assert false (* internal error *) in
1896 printf (f_ "\nSending /dev/%s (%.3f GB) to remote machine\n\n%!")
1897 origin_dev ((Int64.to_float size) /. (1024.*.1024.*.1024.)) in
1899 (* Open the snapshot device. *)
1900 let fd = openfile ("/dev/mapper/" ^ snapshot_dev) [O_RDONLY] 0 in
1903 let (sock,_) as conn = ssh_start_upload config_ssh remote_name in
1905 (* Copy the data. *)
1906 let spinners = "|/-\\" (* "Oo" *) in
1907 let bufsize = 1024 * 1024 in
1908 let buffer = String.create bufsize in
1909 let start = gettimeofday () in
1911 let rec copy bytes_sent last_printed_at spinner =
1912 let n = read fd buffer 0 bufsize in
1914 let n' = write sock buffer 0 n in
1915 if n <> n' then assert false; (* never, according to the manual *)
1917 let bytes_sent = Int64.add bytes_sent (Int64.of_int n) in
1918 let last_printed_at, spinner =
1919 let now = gettimeofday () in
1920 (* Print progress every few seconds. *)
1921 if now -. last_printed_at > 2. then (
1922 let elapsed = Int64.to_float bytes_sent /. Int64.to_float size in
1923 let secs_elapsed = now -. start in
1924 printf "%.0f%% %c %.1f Mbps"
1925 (100. *. elapsed) spinners.[spinner]
1926 (Int64.to_float bytes_sent/.secs_elapsed/.1_000_000. *. 8.);
1927 (* After 60 seconds has elapsed, start printing estimates. *)
1928 if secs_elapsed >= 60. then (
1929 let remaining = 1. -. elapsed in
1930 let secs_remaining = (remaining /. elapsed) *. secs_elapsed in
1931 if secs_remaining > 120. then
1932 printf (f_ " (about %.0f minutes remaining)")
1933 (secs_remaining/.60.)
1935 printf (f_ " (about %.0f seconds remaining)")
1939 let spinner = (spinner + 1) mod String.length spinners in
1942 else last_printed_at, spinner in
1944 copy bytes_sent last_printed_at spinner
1948 printf "\n\n%!"; (* because of the messages printed above *)
1951 ssh_finish_upload conn
1952 ) config_devices_to_send;
1954 (*printf "\n\nPress any key ...\n%!"; ignore (read_line ());*)
1956 (* Clean up and reboot. *)
1958 message_box (sprintf (f_ "%s has finished") program_name)
1959 (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.")
1960 config_ssh.ssh_directory conf_filename)
1968 (*----------------------------------------------------------------------*)
1971 let () = eprintf (f_ "usage: virt-p2v [--test] [ttyname]\n%!") in
1974 (* Make sure that exceptions from 'main' get printed out on stdout
1975 * as well as stderr, since stderr is probably redirected to the
1976 * logfile, and so not visible to the user.
1978 let handle_exn f arg =
1981 print_endline (Printexc.to_string exn);
1984 (* Test harness for the Makefile. The Makefile invokes this script as
1985 * 'virt-p2v --test' just to check it compiles. When it is running
1986 * from the actual live CD, there is a single parameter which is the
1987 * tty name (so usually 'virt-p2v tty1').
1990 match Array.to_list Sys.argv with
1991 | [ _; ("--help"|"-help"|"-?"|"-h") ] -> usage ();
1992 | [ _; "--test" ] -> () (* Makefile test - do nothing. *)
1993 | [ _; ttyname ] -> (* Run main with ttyname. *)
1994 handle_exn main (Some ttyname)
1995 | [ _ ] -> (* Interactive - no ttyname. *)
1996 handle_exn main None
1999 (* This file must end with a newline *)