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 #directory "+extlib";;
29 #directory "+xml-light";;
30 #load "xml-light.cma";;
37 type state = { greeting : bool;
38 remote_host : string option; remote_port : string option;
39 remote_directory : string option;
40 remote_username : string option;
41 network : network option;
42 static_network_config : static_network_config option;
43 devices_to_send : string list option;
44 root_filesystem : partition option;
45 hypervisor : hypervisor option;
46 architecture : architecture option;
47 memory : int option; vcpus : int option;
48 mac_address : string option;
54 and partition = Part of string * string (* eg. "hda", "1" *)
55 | LV of string * string (* eg. "VolGroup00", "LogVol00" *)
56 and hypervisor = Xen | QEMU | KVM
57 and architecture = I386 | X86_64 | IA64 | PPC | PPC64 | SPARC | SPARC64
58 | OtherArch of string | UnknownArch
59 and static_network_config = string * string * string * string * string
60 (* interface, address, netmask, gateway, nameserver *)
62 (*----------------------------------------------------------------------*)
63 (* TO MAKE A CUSTOM virt-p2v SCRIPT, adjust the defaults in this section.
65 * If left as they are, then this will create a generic virt-p2v script
66 * which asks the user for each question. If you set the defaults here
67 * then you will get a custom virt-p2v which is partially or even fully
68 * automated and won't ask the user any questions.
70 * Note that 'None' means 'no default' (ie. ask the user) whereas
71 * 'Some foo' means use 'foo' as the answer.
74 (* If greeting is true, wait for keypress after boot and during
75 * final verification. Set to 'false' for less interactions.
79 (* These are now documented in the man page virt-p2v(1).
80 * 'None' means ask the user.
81 * After changing them, run './virt-p2v --test' to check syntax.
85 remote_directory = None;
86 remote_username = None;
87 devices_to_send = None;
88 root_filesystem = None;
90 static_network_config = None;
97 (* END OF CUSTOM virt-p2v SCRIPT SECTION. *)
98 (*----------------------------------------------------------------------*)
100 (* General helper functions. *)
102 let sort_uniq ?(cmp = compare) xs = (* sort and uniq a list *)
103 let xs = List.sort ~cmp xs in
104 let rec loop = function
105 | [] -> [] | [x] -> [x]
106 | x1 :: x2 :: xs when x1 = x2 -> loop (x1 :: xs)
107 | x :: xs -> x :: loop xs
111 let input_all_lines chan =
112 let lines = ref [] in
114 while true do lines := input_line chan :: !lines done; []
116 End_of_file -> List.rev !lines
118 let dev_of_partition = function
119 | Part (dev, partnum) -> sprintf "/dev/%s%s" dev partnum
120 | LV (vg, lv) -> sprintf "/dev/%s/%s" vg lv
122 let string_of_architecture = function
129 | SPARC64 -> "sparc64"
130 | OtherArch arch -> arch
133 type dialog_status = Yes of string list | No | Help | Back | Error
135 type ask_result = Next of state | Prev | Ask_again
137 type nature = LinuxSwap
138 | LinuxRoot of architecture * linux_distro
139 | WindowsRoot (* Windows C: *)
140 | LinuxBoot (* Linux /boot *)
141 | NotRoot (* mountable, but not / or /boot *)
143 and linux_distro = RHEL of int * int
145 | Debian of int * int
148 let rec string_of_nature = function
149 | LinuxSwap -> "Linux swap"
150 | LinuxRoot (architecture, distro) ->
151 string_of_linux_distro distro ^ " " ^ string_of_architecture architecture
152 | WindowsRoot -> "Windows root"
153 | LinuxBoot -> "Linux /boot"
154 | NotRoot -> "Mountable non-root"
155 | UnknownNature -> "Unknown"
156 and string_of_linux_distro = function
157 | RHEL (a,b) -> sprintf "RHEL %d.%d" a b
158 | Fedora v -> sprintf "Fedora %d" v
159 | Debian (a,b) -> sprintf "Debian %d.%d" a b
160 | OtherLinux -> "Linux"
164 * Each function takes some common parameters (eg. ~title) and some
165 * dialog-specific parameters.
167 * Returns the exit status (Yes lines | No | Help | Back | Error).
169 let msgbox, yesno, inputbox, radiolist, checklist, form =
170 (* Internal function to actually run the "dialog" shell command. *)
171 let run_dialog cparams params =
172 let params = cparams @ params in
173 eprintf "dialog %s\n%!"
174 (String.concat " " (List.map (sprintf "%S") params));
176 (* 'dialog' writes its output/result to stderr, so we need to take
177 * special steps to capture that - in other words, manual pipe/fork.
179 let rfd, wfd = pipe () in
181 | 0 -> (* child, runs dialog *)
183 dup2 wfd stderr; (* capture stderr to pipe *)
184 execvp "dialog" (Array.of_list ("dialog" :: params))
185 | pid -> (* parent *)
187 let chan = in_channel_of_descr rfd in
188 let result = input_all_lines chan in
190 eprintf "dialog result: %S\n%!" (String.concat "\n" result);
191 match snd (wait ()) with
192 | WEXITED 0 -> Yes result (* something selected / entered *)
193 | WEXITED 1 -> No (* cancel / no button *)
194 | WEXITED 2 -> Help (* help pressed *)
195 | WEXITED 3 -> Back (* back button *)
196 | WEXITED _ -> Error (* error or Esc *)
197 | WSIGNALED i -> failwith (sprintf "dialog: killed by signal %d" i)
198 | WSTOPPED i -> failwith (sprintf "dialog: stopped by signal %d" i)
201 (* Handle the common parameters. Note Continuation Passing Style. *)
202 let with_common cont ?(cancel=false) ?(backbutton=true) title =
203 let params = ["--title"; title] in
204 let params = if not cancel then "--nocancel" :: params else params in
206 if backbutton then "--extra-button" :: "--extra-label" :: "Back" :: params
211 (* Message box and yes/no box. *)
214 fun cparams text height width ->
216 [ "--msgbox"; text; string_of_int height; string_of_int width ]
220 fun cparams text height width ->
222 [ "--yesno"; text; string_of_int height; string_of_int width ]
225 (* Simple input box. *)
228 fun cparams text height width default ->
230 [ "--inputbox"; text; string_of_int height; string_of_int width;
234 (* Radio list and check list. *)
237 fun cparams text height width listheight items ->
238 let items = List.map (
240 | tag, item, true -> [ tag; item; "on" ]
241 | tag, item, false -> [ tag; item; "off" ]
243 let items = List.concat items in
244 let items = "--single-quoted" ::
245 "--radiolist" :: text ::
246 string_of_int height :: string_of_int width ::
247 string_of_int listheight :: items in
248 run_dialog cparams items
252 fun cparams text height width listheight items ->
253 let items = List.map (
255 | tag, item, true -> [ tag; item; "on" ]
256 | tag, item, false -> [ tag; item; "off" ]
258 let items = List.concat items in
259 let items = "--separate-output" ::
260 "--checklist" :: text ::
261 string_of_int height :: string_of_int width ::
262 string_of_int listheight :: items in
263 run_dialog cparams items
269 fun cparams text height width formheight items ->
270 let items = List.map (
271 fun (label, y, x, item, y', x', flen, ilen) ->
272 [ label; string_of_int y; string_of_int x; item;
273 string_of_int y'; string_of_int x';
274 string_of_int flen; string_of_int ilen ]
276 let items = List.concat items in
277 let items = "--form" :: text ::
278 string_of_int height :: string_of_int width ::
279 string_of_int formheight :: items in
280 run_dialog cparams items
283 msgbox, yesno, inputbox, radiolist, checklist, form
285 (* Print failure dialog and exit. *)
286 let fail_dialog text =
287 let text = "\n" ^ text ^ "\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
288 ignore (msgbox "Error" text 17 50);
291 (* Shell-safe quoting function. In fact there's one in stdlib so use it. *)
292 let quote = Filename.quote
294 (* Run a shell command and check it returns 0. *)
296 eprintf "sh: %s\n%!" cmd;
297 if Sys.command cmd <> 0 then fail_dialog (sprintf "Command failed:\n\n%s" cmd)
300 eprintf "shfailok: %s\n%!" cmd;
301 ignore (Sys.command cmd)
303 let shwithstatus cmd =
304 eprintf "shwithstatus: %s\n%!" cmd;
307 (* Same as `cmd` in shell. Any error message will be in the logfile. *)
309 eprintf "shget: %s\n%!" cmd;
310 let chan = open_process_in cmd in
311 let lines = input_all_lines chan in
312 match close_process_in chan with
313 | WEXITED 0 -> Some lines (* command succeeded *)
314 | WEXITED _ -> None (* command failed *)
315 | WSIGNALED i -> failwith (sprintf "shget: command killed by signal %d" i)
316 | WSTOPPED i -> failwith (sprintf "shget: command stopped by signal %d" i)
318 (* Start an interactive shell. Need to juggle file descriptors a bit
319 * because bash write PS1 to stderr (currently directed to the logfile).
323 | 0 -> (* child, runs bash *)
326 (* Sys.command runs 'sh -c' which blows away PS1, so set it late. *)
328 Sys.command "PS1='\\u@\\h:\\w\\$ ' /bin/bash --norc --noprofile -i"
330 | _ -> (* parent, waits *)
331 eprintf "waiting for subshell to exit\n%!";
334 (* Some true if is dir/file, Some false if not, None if not found. *)
336 try Some ((stat path).st_kind = S_DIR)
337 with Unix_error (ENOENT, "stat", _) -> None
339 try Some ((stat path).st_kind = S_REG)
340 with Unix_error (ENOENT, "stat", _) -> None
342 (* Useful regular expression. *)
343 let whitespace = Pcre.regexp "[ \t]+"
345 (* Generate a predictable safe name containing only letters, numbers
346 * and underscores. If passed a string with no letters or numbers,
347 * generates "_1", "_2", etc.
352 fun () -> incr i; "_" ^ string_of_int !i
355 let is_safe = function 'a'..'z'|'A'..'Z'|'0'..'9' -> true | _ -> false in
356 let name = String.copy name in
357 let have_safe = ref false in
358 for i = 0 to String.length name - 1 do
359 if not (is_safe name.[i]) then name.[i] <- '_' else have_safe := true
361 if !have_safe then name else next_anon ()
363 type block_device = string * int64 (* "hda" & size in bytes *)
365 (* Parse the output of 'lvs' to get list of LV names, sizes,
366 * corresponding PVs, etc. Returns a list of (lvname, PVs, lvsize).
369 let devname = Pcre.regexp "^/dev/(.+)\\(.+\\)$" in
373 shget "lvs --noheadings -o vg_name,lv_name,devices,lv_size"
377 let lines = List.map (Pcre.split ~rex:whitespace) lines in
380 | [vg; lv; pvs; lvsize]
381 | [_; vg; lv; pvs; lvsize] ->
382 let pvs = String.nsplit pvs "," in
383 let pvs = List.filter_map (
386 let subs = Pcre.exec ~rex:devname pv in
387 Some (Pcre.get_substring subs 1)
390 eprintf "lvs: unexpected device name: %s\n%!" pv;
393 LV (vg, lv), pvs, lvsize
395 failwith ("lvs: unexpected output: " ^ String.concat "," line)
398 (* Get the partitions on a block device.
399 * eg. "sda" -> [Part ("sda","1"); Part ("sda", "2")]
401 let get_partitions dev =
402 let rex = Pcre.regexp ("^" ^ dev ^ "(.+)$") in
403 let devdir = "/sys/block/" ^ dev in
404 let parts = Sys.readdir devdir in
405 let parts = Array.to_list parts in
406 let parts = List.filter (
407 fun name -> Some true = is_dir (devdir ^ "/" ^ name)
409 let parts = List.filter_map (
412 let subs = Pcre.exec ~rex part in
413 Some (Part (dev, Pcre.get_substring subs 1))
419 (* Generate snapshot device name from device name. *)
420 let snapshot_name dev =
421 "snap" ^ (safe_name dev)
423 (* Perform a device-mapper snapshot with ramdisk overlay. *)
425 let next_free_ram_disk =
427 fun () -> incr i; "/dev/ram" ^ string_of_int !i
429 fun origin_dev snapshot_dev ->
430 let ramdisk = next_free_ram_disk () in
432 let cmd = "blockdev --getsz " ^ quote ("/dev/" ^ origin_dev) in
433 let lines = shget cmd in
435 | Some (sectors::_) -> Int64.of_string sectors
437 fail_dialog (sprintf "Snapshot failed - unable to read the size in sectors of block device %s" origin_dev) in
439 (* Create the snapshot origin device. Called, eg. snap_sda1_org *)
440 sh (sprintf "dmsetup create %s_org --table='0 %Ld snapshot-origin /dev/%s'"
441 snapshot_dev sectors origin_dev);
442 (* Create the snapshot. *)
443 sh (sprintf "dmsetup create %s --table='0 %Ld snapshot /dev/mapper/%s_org %s n 64'"
444 snapshot_dev sectors snapshot_dev ramdisk)
446 (* Try to perform automatic network configuration, assuming a Fedora or
447 * RHEL-like root filesystem mounted on /mnt/root.
449 let auto_network state =
450 (* Fedora gives an error if this file doesn't exist. *)
451 sh "touch /etc/resolv.conf";
454 (* We can run /mnt/root/etc/init.d/network in a chroot environment,
455 * however this won't work directly because the architecture of the
456 * binaries under /mnt/root (eg. /mnt/root/sbin/ip) might not match
457 * the architecture of the live CD kernel. In particular, a 32 bit
458 * live CD cannot run 64 bit binaries. So we also have to bind-mount
459 * the live CD's /bin, /sbin, /lib etc. over the equivalents in
463 if is_dir dir = Some true then
464 sh ("mount -o bind " ^ quote dir ^ " " ^ quote ("/mnt/root" ^ dir))
467 if is_dir dir = Some true then sh ("umount -l " ^ quote ("/mnt/root" ^ dir))
470 "/bin"; "/sbin"; "/lib"; "/lib64";
471 "/usr/bin"; "/usr/sbin"; "/usr/lib"; "/usr/lib64";
475 let status = shwithstatus "chroot /mnt/root /etc/init.d/network start" in
476 List.iter unbind dirs;
479 (* Simpler way to do the above.
480 * NB. Lazy unmount is required because dhclient keeps its current
481 * directory open on /etc/sysconfig/network-scripts/
483 sh "mount -o bind /mnt/root/etc /etc";
484 let status = shwithstatus "/etc/init.d/network start" in
487 (* Try to ping the remote host to see if this worked. *)
488 shfailok ("ping -c 3 " ^ Option.map_default quote "" state.remote_host);
490 if state.greeting then (
491 printf "\n\nDid automatic network configuration work?\n";
492 printf "Hint: If not sure, there is a shell on console [ALT] [F2]\n";
494 let line = read_line () in
495 String.length line > 0 && (line.[0] = 'y' || line.[0] = 'Y')
498 (* Non-interactive: return the status of /etc/init.d/network start. *)
501 (* Configure the network statically. *)
502 let static_network state =
503 match state.static_network_config with
504 | None -> false (* failed *)
505 | Some (interface, address, netmask, gateway, nameserver) ->
506 let do_cmd_or_exit cmd = if shwithstatus cmd <> 0 then raise Exit in
508 do_cmd_or_exit (sprintf "ifconfig %s %s netmask %s"
509 (quote interface) (quote address) (quote netmask));
510 do_cmd_or_exit (sprintf "route add default gw %s %s"
511 (quote gateway) (quote interface));
512 if nameserver <> "" then
513 do_cmd_or_exit (sprintf "echo nameserver %s > /etc/resolv.conf"
517 Exit -> false (* failed *)
519 let qemu_network () =
520 sh "ifconfig eth0 10.0.2.10 netmask 255.255.255.0";
521 sh "route add default gw 10.0.2.2 eth0";
522 sh "echo nameserver 10.0.2.3 > /etc/resolv.conf"
524 (* Map local device names to remote devices names. At the moment we
525 * just change sd* to hd* (as device names appear under fullvirt). In
526 * future, lots of complex possibilities.
528 let remote_of_origin_dev =
529 let devsd = Pcre.regexp "^sd([[:alpha:]]+[[:digit:]]*)$" in
530 let devsd_subst = Pcre.subst "hd$1" in
532 Pcre.replace ~rex:devsd ~itempl:devsd_subst dev
534 (* Rewrite /mnt/root/etc/fstab. *)
535 let rewrite_fstab state devices_to_send =
536 let filename = "/mnt/root/etc/fstab" in
537 if is_file filename = Some true then (
538 sh ("cp " ^ quote filename ^ " " ^ quote (filename ^ ".p2vsaved"));
540 let chan = open_in filename in
541 let lines = input_all_lines chan in
543 let lines = List.map (Pcre.split ~rex:whitespace) lines in
544 let lines = List.map (
546 | dev :: rest when String.starts_with dev "/dev/" ->
547 let dev = String.sub dev 5 (String.length dev - 5) in
548 let dev = remote_of_origin_dev dev in
549 let dev = "/dev/" ^ dev in
554 let chan = open_out filename in
557 | [dev; mountpoint; fstype; options; freq; passno] ->
558 fprintf chan "%-23s %-23s %-7s %-15s %s %s\n"
559 dev mountpoint fstype options freq passno
561 output_string chan (String.concat " " line)
566 (* Main entry point. *)
567 let rec main ttyname =
568 (* Running from an init script. We don't have much of a
569 * login environment, so set one up.
573 ["/usr/sbin"; "/sbin"; "/usr/local/bin"; "/usr/kerberos/bin";
574 "/usr/bin"; "/bin"]);
575 putenv "HOME" "/root";
576 putenv "LOGNAME" "root";
578 (* We can safely write in /tmp (it's a synthetic live CD directory). *)
581 (* Set up logging to /tmp/virt-p2v.log. *)
582 let fd = openfile "virt-p2v.log" [ O_WRONLY; O_APPEND; O_CREAT ] 0o644 in
586 (* Log the start up time. *)
587 eprintf "\n\n**************************************************\n\n";
588 let tm = localtime (time ()) in
589 eprintf "virt-p2v-ng starting up at %04d-%02d-%02d %02d:%02d:%02d\n\n%!"
590 (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min tm.tm_sec;
592 (* Connect stdin/stdout to the tty. *)
596 let fd = openfile ("/dev/" ^ ttyname) [ O_RDWR ] 0 in
600 printf "virt-p2v starting up ...\n%!";
602 (* Disable screen blanking on tty. *)
603 sh "setterm -blank 0";
605 (* Check that the environment is a sane-looking live CD. If not, bail. *)
606 if is_dir "/mnt/root" <> Some true then
608 "You should only run this script from the live CD or a USB key.";
610 printf "virt-p2v detecting hard drives (this may take some time) ...\n%!";
612 (* Search for all non-removable block devices. Do this early and bail
613 * if we can't find anything. This is a list of strings, like "hda".
615 let all_block_devices : block_device list =
616 let rex = Pcre.regexp "^[hs]d" in
617 let devices = Array.to_list (Sys.readdir "/sys/block") in
618 let devices = List.sort devices in
619 let devices = List.filter (fun d -> Pcre.pmatch ~rex d) devices in
620 eprintf "all_block_devices: block devices: %s\n%!"
621 (String.concat "; " devices);
622 (* Run blockdev --getsize64 on each, and reject any where this fails
623 * (probably removable devices).
625 let devices = List.filter_map (
627 let cmd = "blockdev --getsize64 " ^ quote ("/dev/" ^ d) in
628 let lines = shget cmd in
630 | Some (blksize::_) -> Some (d, Int64.of_string blksize)
631 | Some [] | None -> None
633 eprintf "all_block_devices: non-removable block devices: %s\n%!"
635 (List.map (fun (d, b) -> sprintf "%s [%Ld]" d b) devices));
637 fail_dialog "No non-removable block devices (hard disks, etc.) could be found on this machine.";
640 (* Search for partitions and LVs (anything that could contain a
641 * filesystem directly). We refer to these generically as
644 let all_partitions : partition list =
647 let lvs = get_lvs () in
648 let pvs = List.map (fun (_, pvs, _) -> pvs) lvs in
649 let pvs = List.concat pvs in
650 let pvs = sort_uniq pvs in
651 eprintf "all_partitions: PVs: %s\n%!" (String.concat "; " pvs);
652 let lvs = List.map (fun (lvname, _, _) -> lvname) lvs in
653 eprintf "all_partitions: LVs: %s\n%!"
654 (String.concat "; " (List.map dev_of_partition lvs));
657 (* Partitions (eg. "sda1", "sda2"). *)
659 let parts = List.map fst all_block_devices in
660 let parts = List.map get_partitions parts in
661 let parts = List.concat parts in
662 eprintf "all_partitions: all partitions: %s\n%!"
663 (String.concat "; " (List.map dev_of_partition parts));
665 (* Remove any partitions which are PVs. *)
666 let parts = List.filter (
668 | Part (dev, partnum) -> not (List.mem (dev ^ partnum) pvs)
669 | LV _ -> assert false
672 eprintf "all_partitions: partitions after removing PVs: %s\n%!"
673 (String.concat "; " (List.map dev_of_partition parts));
675 (* Concatenate LVs & Parts *)
678 (* Try to determine the nature of each partition.
679 * Root? Swap? Architecture? etc.
681 let all_partitions : (partition * nature) list =
682 (* Output of 'file' command for Linux swap file. *)
683 let swap = Pcre.regexp "Linux.*swap.*file" in
684 (* Contents of /etc/redhat-release. *)
685 let rhel = Pcre.regexp "(?:Red Hat Enterprise Linux|CentOS|Scientific Linux).*release (\\d+)(?:\\.(\\d+))?" in
686 let fedora = Pcre.regexp "Fedora.*release (\\d+)" in
687 (* Contents of /etc/debian_version. *)
688 let debian = Pcre.regexp "^(\\d+)\\.(\\d+)" in
689 (* Output of 'file' on certain executables. *)
690 let i386 = Pcre.regexp ", Intel 80386," in
691 let x86_64 = Pcre.regexp ", x86-64," in
692 let itanic = Pcre.regexp ", IA-64," in
694 (* Examine the filesystem mounted on 'mnt' to determine the
695 * operating system, and, if Linux, the distro.
698 if is_dir (mnt ^ "/Windows") = Some true &&
699 is_file (mnt ^ "/autoexec.bat") = Some true then
701 else if is_dir (mnt ^ "/etc") = Some true &&
702 is_dir (mnt ^ "/sbin") = Some true &&
703 is_dir (mnt ^ "/var") = Some true then (
704 if is_file (mnt ^ "/etc/redhat-release") = Some true then (
705 let chan = open_in (mnt ^ "/etc/redhat-release") in
706 let lines = input_all_lines chan in
710 | [] -> (* empty /etc/redhat-release ...? *)
711 LinuxRoot (UnknownArch, OtherLinux)
712 | line::_ -> (* try to detect OS from /etc/redhat-release *)
714 let subs = Pcre.exec ~rex:rhel line in
715 let major = int_of_string (Pcre.get_substring subs 1) in
717 try int_of_string (Pcre.get_substring subs 2)
718 with Not_found -> 0 in
719 LinuxRoot (UnknownArch, RHEL (major, minor))
721 Not_found | Failure "int_of_string" ->
723 let subs = Pcre.exec ~rex:fedora line in
724 let version = int_of_string (Pcre.get_substring subs 1) in
725 LinuxRoot (UnknownArch, Fedora version)
727 Not_found | Failure "int_of_string" ->
728 LinuxRoot (UnknownArch, OtherLinux)
730 else if is_file (mnt ^ "/etc/debian_version") = Some true then (
731 let chan = open_in (mnt ^ "/etc/debian_version") in
732 let lines = input_all_lines chan in
736 | [] -> (* empty /etc/debian_version ...? *)
737 LinuxRoot (UnknownArch, OtherLinux)
738 | line::_ -> (* try to detect version from /etc/debian_version *)
740 let subs = Pcre.exec ~rex:debian line in
741 let major = int_of_string (Pcre.get_substring subs 1) in
742 let minor = int_of_string (Pcre.get_substring subs 2) in
743 LinuxRoot (UnknownArch, Debian (major, minor))
745 Not_found | Failure "int_of_string" ->
746 LinuxRoot (UnknownArch, OtherLinux)
749 LinuxRoot (UnknownArch, OtherLinux)
750 ) else if is_dir (mnt ^ "/grub") = Some true &&
751 is_file (mnt ^ "/grub/stage1") = Some true then (
754 NotRoot (* mountable, but not a root filesystem *)
757 (* Examine the Linux root filesystem mounted on 'mnt' to
758 * determine the architecture. We do this by looking at some
759 * well-known binaries that we expect to be there.
761 let detect_architecture mnt =
762 let cmd = "file -bL " ^ quote (mnt ^ "/sbin/init") in
764 | Some (str::_) when Pcre.pmatch ~rex:i386 str -> I386
765 | Some (str::_) when Pcre.pmatch ~rex:x86_64 str -> X86_64
766 | Some (str::_) when Pcre.pmatch ~rex:itanic str -> IA64
772 let dev = dev_of_partition part in (* Get /dev device. *)
775 (* Use 'file' command to detect if it is swap. *)
776 let cmd = "file -sbL " ^ quote dev in
778 | Some (str::_) when Pcre.pmatch ~rex:swap str -> LinuxSwap
780 (* Blindly try to mount the device. *)
781 let cmd = "mount -o ro " ^ quote dev ^ " /mnt/root" in
782 match shwithstatus cmd with
784 let os = detect_os "/mnt/root" in
787 | LinuxRoot (UnknownArch, distro) ->
788 let architecture = detect_architecture "/mnt/root" in
789 LinuxRoot (architecture, distro)
791 sh "umount /mnt/root";
794 | _ -> UnknownNature (* not mountable *)
798 eprintf "partition detection: %s is %s\n%!"
799 dev (string_of_nature nature);
805 printf "virt-p2v finished detecting hard drives\n%!";
808 let ask_greeting state =
809 ignore (msgbox "virt-p2v" "\nWelcome to virt-p2v, 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." 18 50);
813 let ask_hostname state =
815 inputbox "Remote host" "Remote host" 10 50
816 (Option.default "" state.remote_host)
818 | Yes [] -> Ask_again
819 | Yes (hostname::_) -> Next { state with remote_host = Some hostname }
820 | No | Help | Error -> Ask_again
826 inputbox "Remote port" "Remote port" 10 50
827 (Option.default "22" state.remote_port)
829 | Yes ([]|""::_) -> Next { state with remote_port = Some "22" }
830 | Yes (port::_) -> Next { state with remote_port = Some port }
831 | No | Help | Error -> Ask_again
835 let ask_directory state =
836 let default_dir = "/var/lib/xen/images" in
838 inputbox "Remote directory" "Remote directory" 10 50
839 (Option.default default_dir state.remote_directory)
841 | Yes ([]|""::_) -> Next { state with remote_directory = Some default_dir }
842 | Yes (dir::_) -> Next { state with remote_directory = Some dir }
843 | No | Help | Error -> Ask_again
847 let ask_username state =
848 let default_username = "root" in
850 inputbox "Remote username" "Remote username for ssh access to server" 10 50
851 (Option.default default_username state.remote_username)
854 Next { state with remote_username = Some default_username }
855 | Yes (user::_) -> Next { state with remote_username = Some user }
856 | No | Help | Error -> Ask_again
860 let ask_network state =
862 radiolist "Network configuration" "Network configuration" 12 50 4 [
863 "auto", "Automatic configuration", state.network = Some Auto;
864 "ask", "Ask for fixed IP address and gateway",
865 state.network = Some Static;
866 "sh", "Configure from the shell", state.network = Some Shell;
867 "qemu", "QEMU user network (for developers only)",
868 state.network = Some QEMUUserNet
871 | Yes ("auto"::_) -> Next { state with network = Some Auto }
872 | Yes ("ask"::_) -> Next { state with network = Some Static }
873 | Yes ("sh"::_) -> Next { state with network = Some Shell }
874 | Yes ("qemu"::_) -> Next { state with network = Some QEMUUserNet }
875 | Yes _ | No | Help | Error -> Ask_again
879 let ask_static_network_config state =
880 let interface, address, netmask, gateway, nameserver =
881 match state.static_network_config with
882 | Some (a,b,c,d,e) -> a,b,c,d,e
883 | None -> "eth0","","","","" in
885 form "Static network configuration" "Static network configuration"
887 "Interface", 1, 0, interface, 1, 12, 8, 0;
888 "Address", 2, 0, address, 2, 12, 16, 0;
889 "Netmask", 3, 0, netmask, 3, 12, 16, 0;
890 "Gateway", 4, 0, gateway, 4, 12, 16, 0;
891 "Nameserver", 5, 0, nameserver, 5, 12, 16, 0;
894 | Yes (interface::address::netmask::gateway::nameserver::_) ->
896 static_network_config = Some (interface, address, netmask,
897 gateway, nameserver) }
898 | Yes _ | No | Help | Error -> Ask_again
902 let ask_devices state =
903 let selected_devices = Option.default [] state.devices_to_send in
904 let devices = List.map (
905 fun (dev, blksize) ->
907 sprintf "/dev/%s (%.3f GB)" dev
908 ((Int64.to_float blksize) /. (1024.*.1024.*.1024.)),
909 List.mem dev selected_devices)
910 ) all_block_devices in
912 checklist "Devices" "Pick devices to send" 15 50 8 devices
914 | Yes [] | No | Help | Error -> Ask_again
915 | Yes devices -> Next { state with devices_to_send = Some devices }
920 let parts = List.mapi (
921 fun i (part, nature) ->
924 | LinuxSwap -> " (Linux swap)"
925 | LinuxRoot (_, RHEL (a,b)) -> sprintf " (RHEL %d.%d root)" a b
926 | LinuxRoot (_, Fedora v) -> sprintf " (Fedora %d root)" v
927 | LinuxRoot (_, Debian (a,b)) -> sprintf " (Debian %d.%d root)" a b
928 | LinuxRoot (_, OtherLinux) -> sprintf " (Linux root)"
929 | WindowsRoot -> " (Windows C:)"
930 | LinuxBoot -> " (Linux /boot)"
931 | NotRoot -> " (filesystem)"
932 | UnknownNature -> "" in
934 dev_of_partition part ^ descr,
935 Some part = state.root_filesystem)
938 radiolist "Root device"
939 "Pick partition containing the root (/) filesystem" 18 70 9
943 let (part, _) = List.nth all_partitions (int_of_string i) in
944 Next { state with root_filesystem = Some part }
945 | Yes [] | No | Help | Error -> Ask_again
949 let ask_hypervisor state =
951 radiolist "Hypervisor"
952 "Choose hypervisor / virtualization system"
954 "xen", "Xen", state.hypervisor = Some Xen;
955 "qemu", "QEMU", state.hypervisor = Some QEMU;
956 "kvm", "KVM", state.hypervisor = Some KVM;
957 "other", "Other", state.hypervisor = None
960 | Yes ("xen"::_) -> Next { state with hypervisor = Some Xen }
961 | Yes ("qemu"::_) -> Next { state with hypervisor = Some QEMU }
962 | Yes ("kvm"::_) -> Next { state with hypervisor = Some KVM }
963 | Yes _ -> Next { state with hypervisor = None }
964 | No | Help | Error -> Ask_again
968 let ask_architecture state =
970 radiolist "Architecture" "Machine architecture" 16 50 8 [
971 "i386", "i386 and up (32 bit)", state.architecture = Some I386;
972 "x86_64", "x86-64 (64 bit)", state.architecture = Some X86_64;
973 "ia64", "Itanium IA64", state.architecture = Some IA64;
974 "ppc", "PowerPC (32 bit)", state.architecture = Some PPC;
975 "ppc64", "PowerPC (64 bit)", state.architecture = Some PPC64;
976 "sparc", "SPARC (32 bit)", state.architecture = Some SPARC;
977 "sparc64", "SPARC (64 bit)", state.architecture = Some SPARC64;
978 "auto", "Auto-detect",
979 state.architecture = None || state.architecture = Some UnknownArch;
982 | Yes ("i386" :: _) -> Next { state with architecture = Some I386 }
983 | Yes ("x86_64" :: _) -> Next { state with architecture = Some X86_64 }
984 | Yes ("ia64" :: _) -> Next { state with architecture = Some IA64 }
985 | Yes ("ppc" :: _) -> Next { state with architecture = Some PPC }
986 | Yes ("ppc64" :: _) -> Next { state with architecture = Some PPC64 }
987 | Yes ("sparc" :: _) -> Next { state with architecture = Some SPARC }
988 | Yes ("sparc64" :: _) -> Next { state with architecture = Some SPARC64 }
989 | Yes _ -> Next { state with architecture = Some UnknownArch }
990 | No | Help | Error -> Ask_again
994 let ask_memory state =
996 inputbox "Memory" "Memory (MB). Leave blank to use same as physical server."
998 (Option.map_default string_of_int "" state.memory)
1000 | Yes (""::_ | []) -> Next { state with memory = Some 0 }
1002 let mem = try int_of_string mem with Failure "int_of_string" -> -1 in
1003 if mem < 0 || (mem > 0 && mem < 64) then Ask_again
1004 else Next { state with memory = Some mem }
1005 | No | Help | Error -> Ask_again
1009 let ask_vcpus state =
1011 inputbox "VCPUs" "Virtual CPUs. Leave blank to use same as physical server."
1013 (Option.map_default string_of_int "" state.vcpus)
1015 | Yes (""::_ | []) -> Next { state with vcpus = Some 0 }
1018 try int_of_string vcpus with Failure "int_of_string" -> -1 in
1019 if vcpus < 0 then Ask_again
1020 else Next { state with vcpus = Some vcpus }
1021 | No | Help | Error -> Ask_again
1025 let ask_mac_address state =
1027 inputbox "MAC address"
1028 "Network MAC address. Leave blank to use a random address." 10 50
1029 (Option.default "" state.mac_address)
1031 | Yes (""::_ | []) -> Next { state with mac_address = Some "" }
1032 | Yes (mac :: _) -> Next { state with mac_address = Some mac }
1033 | No | Help | Error -> Ask_again
1037 let ask_verify state =
1039 yesno "Verify and proceed"
1040 (sprintf "\nPlease verify the settings below and click [OK] to proceed, or the [Back] button to return to a previous step.
1052 (Option.default "" state.remote_host)
1053 (Option.default "" state.remote_port)
1054 (Option.default "" state.remote_directory)
1055 (match state.network with
1056 | Some Auto -> "Auto-configure" | Some Shell -> "Shell"
1057 | Some Static -> "Static" | Some QEMUUserNet -> "QEMU user net"
1059 (String.concat "," (Option.default [] state.devices_to_send))
1060 (Option.map_default dev_of_partition "" state.root_filesystem)
1061 (match state.hypervisor with
1062 | Some Xen -> "Xen" | Some QEMU -> "QEMU" | Some KVM -> "KVM"
1063 | None -> "Other / not set")
1064 (match state.architecture with
1065 | Some UnknownArch -> "Auto-detect"
1066 | Some arch -> string_of_architecture arch | None -> "")
1067 (match state.memory with
1068 | Some 0 -> "Same as physical"
1069 | Some mem -> string_of_int mem ^ " MB" | None -> "")
1070 (match state.vcpus with
1071 | Some 0 -> "Same as physical"
1072 | Some vcpus -> string_of_int vcpus | None -> "")
1073 (match state.mac_address with
1074 | Some "" -> "Random" | Some mac -> mac | None -> "")
1078 | Yes _ -> Next state
1080 | No | Help | Error -> Ask_again
1083 (* This is the list of dialogs, in order. The user can go forwards or
1084 * backwards through them.
1086 * The second parameter in each tuple is true if we need to skip
1087 * this dialog statically (info already supplied in 'defaults' above).
1089 * The third parameter in each tuple is a function that tests whether
1090 * this dialog should be skipped, given other parts of the current state.
1093 let dont_skip _ = false in
1095 ask_greeting, not defaults.greeting, dont_skip;
1096 ask_hostname, defaults.remote_host <> None, dont_skip;
1097 ask_port, defaults.remote_port <> None, dont_skip;
1098 ask_directory, defaults.remote_directory <> None, dont_skip;
1099 ask_username, defaults.remote_username <> None, dont_skip;
1100 ask_network, defaults.network <> None, dont_skip;
1101 ask_static_network_config,
1102 defaults.static_network_config <> None,
1103 (function { network = Some Static } -> false | _ -> true);
1104 ask_devices, defaults.devices_to_send <> None, dont_skip;
1105 ask_root, defaults.root_filesystem <> None, dont_skip;
1106 ask_hypervisor, defaults.hypervisor <> None, dont_skip;
1107 ask_architecture, defaults.architecture <> None, dont_skip;
1108 ask_memory, defaults.memory <> None, dont_skip;
1109 ask_vcpus, defaults.vcpus <> None, dont_skip;
1110 ask_mac_address, defaults.mac_address <> None, dont_skip;
1111 ask_verify, not defaults.greeting, dont_skip;
1114 (* Loop through the dialogs until we reach the end. *)
1115 let rec loop ?(back=false) posn state =
1116 eprintf "dialog loop: posn = %d, back = %b\n%!" posn back;
1117 if posn >= Array.length dlgs then state (* Finished all dialogs. *)
1118 else if posn < 0 then loop 0 state
1120 let dlg, skip_static, skip_dynamic = dlgs.(posn) in
1121 if skip_static || skip_dynamic state then
1122 (* Skip this dialog. *)
1123 loop ~back (if back then posn-1 else posn+1) state
1126 match dlg state with
1127 | Next new_state -> loop (posn+1) new_state (* Forwards. *)
1128 | Ask_again -> loop posn state (* Repeat the question. *)
1129 | Prev -> loop ~back:true (posn-1) state (* Backwards / back button. *)
1133 let state = loop 0 defaults in
1135 eprintf "finished dialog loop\n%!";
1137 (* Switch LVM config. *)
1139 putenv "LVM_SYSTEM_DIR" "/etc/lvm.new"; (* see lvm(8) *)
1140 sh "rm -f /etc/lvm/cache/.cache";
1141 sh "rm -f /etc/lvm.new/cache/.cache";
1143 (* Snapshot the block devices to send. *)
1144 let devices_to_send = Option.get state.devices_to_send in
1145 let devices_to_send =
1148 let snapshot_dev = snapshot_name origin_dev in
1149 snapshot origin_dev snapshot_dev;
1150 (origin_dev, snapshot_dev)
1151 ) devices_to_send in
1153 (* Run kpartx on the snapshots. *)
1155 fun (origin, snapshot) ->
1156 shfailok ("kpartx -a " ^ quote ("/dev/mapper/" ^ snapshot))
1159 (* Rescan for LVs. *)
1163 (* Mount the root filesystem under /mnt/root. *)
1164 let root_filesystem = Option.get state.root_filesystem in
1165 (match root_filesystem with
1166 | Part (dev, partnum) ->
1167 let dev = dev ^ partnum in
1168 let snapshot_dev = snapshot_name dev in
1169 sh ("mount " ^ quote ("/dev/mapper/" ^ snapshot_dev) ^ " /mnt/root")
1172 (* The LV will be backed by a snapshot device, so just mount
1175 sh ("mount " ^ quote ("/dev/" ^ vg ^ "/" ^ lv) ^ " /mnt/root")
1178 (* See if we can do network configuration. *)
1179 let network = Option.get state.network in
1182 printf "Network configuration.\n\n";
1183 printf "Please configure the network from this shell.\n\n";
1184 printf "When you have finished, exit the shell with ^D or exit.\n\n%!";
1188 printf "Trying static network configuration.\n\n%!";
1189 if not (static_network state) then (
1190 printf "\nAuto-configuration failed. Starting a shell.\n\n";
1191 printf "Please configure the network from this shell.\n\n";
1192 printf "When you have finished, exit the shell with ^D or exit.\n\n";
1198 "Trying network auto-configuration from root filesystem ...\n\n%!";
1199 if not (auto_network state) then (
1200 printf "\nAuto-configuration failed. Starting a shell.\n\n";
1201 printf "Please configure the network from this shell.\n\n";
1202 printf "When you have finished, exit the shell with ^D or exit.\n\n";
1206 printf "Trying QEMU network configuration.\n\n%!";
1210 (* Work out what devices will be called at the remote end. *)
1211 let devices_to_send = List.map (
1212 fun (origin_dev, snapshot_dev) ->
1213 let remote_dev = remote_of_origin_dev origin_dev in
1214 (origin_dev, snapshot_dev, remote_dev)
1215 ) devices_to_send in
1217 (* Modify files on the root filesystem. *)
1218 rewrite_fstab state devices_to_send;
1219 (* XXX Other files to rewrite? *)
1221 (* Unmount the root filesystem and sync disks. *)
1222 sh "umount /mnt/root";
1223 sh "sync"; (* Ugh, should be in stdlib. *)
1225 (* Get architecture of root filesystem, detected previously. *)
1226 let system_architecture =
1228 (match List.assoc root_filesystem all_partitions with
1229 | LinuxRoot (arch, _) -> arch
1230 | _ -> raise Not_found
1234 (* None was detected before, so assume same as live CD. *)
1235 let arch = shget "uname -m" in
1237 | Some (("i386"|"i486"|"i586"|"i686")::_) -> I386
1238 | Some ("x86_64"::_) -> X86_64
1239 | Some ("ia64"::_) -> IA64
1240 | _ -> I386 (* probably wrong XXX *) in
1242 (* Autodetect system memory. *)
1244 let mem = shget "head -1 /proc/meminfo | awk '{print $2/1024}'" in
1246 | Some (mem::_) -> int_of_float (float_of_string mem)
1249 (* Autodetect system # pCPUs. *)
1250 let system_nr_cpus =
1252 shget "grep ^processor /proc/cpuinfo | tail -1 | awk '{print $3+1}'" in
1254 | Some (cpus::_) -> int_of_string cpus
1257 let remote_host = Option.get state.remote_host in
1258 let remote_port = Option.get state.remote_port in
1259 let remote_directory = Option.get state.remote_directory in
1260 let remote_username = Option.get state.remote_username in
1262 (* Functions to connect and disconnect from the remote system. *)
1263 let do_connect remote_name _ =
1264 let cmd = sprintf "ssh -C -l %s -p %s %s \"cat > %s/%s\""
1265 (quote remote_username) (quote remote_port) (quote remote_host)
1266 (quote remote_directory) (quote remote_name) in
1267 eprintf "connect: %s\n%!" cmd;
1268 let chan = open_process_out cmd in
1269 descr_of_out_channel chan, chan
1271 let do_disconnect (_, chan) =
1272 match close_process_out chan with
1273 | WEXITED 0 -> () (* OK *)
1274 | WEXITED i -> failwith (sprintf "ssh: exited with error code %d" i)
1275 | WSIGNALED i -> failwith (sprintf "ssh: killed by signal %d" i)
1276 | WSTOPPED i -> failwith (sprintf "ssh: stopped by signal %d" i)
1279 (* XXX This is using the hostname derived from network configuration
1280 * above. We might want to ask the user to choose.
1282 let hostname = safe_name (gethostname ()) in
1284 let date = sprintf "%04d%02d%02d%02d%02d"
1285 (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min in
1286 "p2v-" ^ hostname ^ "-" ^ date in
1288 (* Work out what the image filenames will be at the remote end. *)
1289 let devices_to_send = List.map (
1290 fun (origin_dev, snapshot_dev, remote_dev) ->
1291 let remote_name = basename ^ "-" ^ remote_dev ^ ".img" in
1292 (origin_dev, snapshot_dev, remote_dev, remote_name)
1293 ) devices_to_send in
1295 (* Write a configuration file. Not sure if this is any better than
1296 * just 'sprintf-ing' bits of XML text together, but at least we will
1297 * always get well-formed XML.
1299 * XXX For some of the stuff here we really should do a
1300 * virConnectGetCapabilities call to the remote host first.
1302 * XXX There is a case for using virt-install to generate this XML.
1303 * When we start to incorporate libvirt access & storage API this
1304 * needs to be rethought.
1306 let conf_filename = basename ^ ".conf" in
1309 match state.architecture with
1310 | Some UnknownArch | None -> system_architecture
1311 | Some arch -> arch in
1313 match state.memory with
1314 | Some 0 | None -> system_memory
1315 | Some memory -> memory in
1317 match state.vcpus with
1318 | Some 0 | None -> system_nr_cpus
1321 match state.mac_address with
1324 List.map (sprintf "%02x") (
1325 List.map (fun _ -> Random.int 256) [0;0;0]
1327 String.concat ":" ("00"::"16"::"3e"::random)
1328 | Some mac -> mac in
1331 (* Shortcut to make "<name>value</name>". *)
1332 let leaf name value = Xml.Element (name, [], [Xml.PCData value]) in
1333 (* ... and the _other_ sort of leaf (god I hate XML). *)
1334 let tleaf name attribs = Xml.Element (name, attribs, []) in
1336 (* Standard stuff for every domain. *)
1337 let name = leaf "name" hostname in
1338 let memory = leaf "memory" (string_of_int (memory * 1024)) in
1339 let vcpu = leaf "vcpu" (string_of_int vcpus) in
1341 (* Top-level stuff which differs for each HV type (isn't this supposed
1342 * to be portable ...)
1345 match state.hypervisor with
1347 [Xml.Element ("os", [],
1349 leaf "loader" "/usr/lib/xen/boot/hvmloader";
1350 tleaf "boot" ["dev", "hd"]]);
1351 Xml.Element ("features", [],
1355 tleaf "clock" ["sync", "localtime"]]
1357 [Xml.Element ("os", [], [leaf "type" "hvm"]);
1358 tleaf "clock" ["sync", "localtime"]]
1360 [Xml.Element ("os", [],
1361 [Xml.Element ("type",
1363 string_of_architecture architecture;
1365 [Xml.PCData "hvm"]);
1366 tleaf "boot" ["dev", "hd"]])]
1370 (* <devices> section. *)
1373 match state.hypervisor with
1375 [leaf "emulator" "/usr/lib64/xen/bin/qemu-dm"] (* XXX lib64? *)
1377 [leaf "emulator" "/usr/bin/qemu"]
1379 [leaf "emulator" "/usr/bin/qemu-kvm"]
1383 Xml.Element ("interface", ["type", "user"],
1384 [tleaf "mac" ["address", mac_address]]) in
1385 (* XXX should have an option for Xen bridging:
1387 "interface", ["type","bridge"],
1388 [tleaf "source" ["bridge","xenbr0"];
1389 tleaf "mac" ["address",mac_address];
1390 tleaf "script" ["path","vif-bridge"]])*)
1391 let graphics = tleaf "graphics" ["type", "vnc"] in
1393 let disks = List.map (
1394 fun (_, _, remote_dev, remote_name) ->
1396 "disk", ["type", "file";
1398 [tleaf "source" ["file", remote_directory ^ "/" ^ remote_name];
1399 tleaf "target" ["dev", remote_dev]]
1401 ) devices_to_send in
1405 emulator @ interface :: graphics :: disks
1408 (* Put it all together in <domain type='foo'>. *)
1411 (match state.hypervisor with
1412 | Some Xen -> ["type", "xen"]
1413 | Some QEMU -> ["type", "qemu"]
1414 | Some KVM -> ["type", "kvm"]
1416 name :: memory :: vcpu :: extras @ [devices]
1419 (* Convert XML configuration file to a string, then send it to the
1423 let xml = Xml.to_string_fmt xml in
1426 match state.hypervisor with
1427 | Some Xen | None -> ""
1428 | Some QEMU | Some KVM -> " -c qemu:///system" in
1429 let xml = sprintf "\
1431 This is a libvirt configuration file.
1433 To start the domain, do:
1436 -->\n\n" conn_arg conf_filename conn_arg hostname ^ xml in
1438 let xml_len = String.length xml in
1439 eprintf "length of configuration file is %d bytes\n%!" xml_len;
1441 let (sock,_) as conn = do_connect conf_filename (Int64.of_int xml_len) in
1442 (* In OCaml this actually loops calling write(2) *)
1443 ignore (write sock xml 0 xml_len);
1444 do_disconnect conn in
1446 (* Send the device snapshots to the remote host. *)
1447 (* XXX This code should be made more robust against both network
1448 * errors and local I/O errors. Also should allow the user several
1449 * attempts to connect, or let them go back to the dialog stage.
1452 fun (origin_dev, snapshot_dev, remote_dev, remote_name) ->
1453 eprintf "sending %s as %s\n%!" origin_dev remote_name;
1456 try List.assoc origin_dev all_block_devices
1457 with Not_found -> assert false (* internal error *) in
1459 printf "Sending /dev/%s (%.3f GB) to remote machine\n%!" origin_dev
1460 ((Int64.to_float size) /. (1024.*.1024.*.1024.));
1462 (* Open the snapshot device. *)
1463 let fd = openfile ("/dev/mapper/" ^ snapshot_dev) [O_RDONLY] 0 in
1466 let (sock,_) as conn = do_connect remote_name size in
1468 (* Copy the data. *)
1469 let bufsize = 1024 * 1024 in
1470 let buffer = String.create bufsize in
1471 let start = gettimeofday () in
1473 let rec copy bytes_sent last_printed_at =
1474 let n = read fd buffer 0 bufsize in
1476 ignore (write sock buffer 0 n);
1478 let bytes_sent = Int64.add bytes_sent (Int64.of_int n) in
1479 let last_printed_at =
1480 let now = gettimeofday () in
1481 (* Print progress once per second. *)
1482 if now -. last_printed_at > 1. then (
1483 let elapsed = Int64.to_float bytes_sent /. Int64.to_float size in
1484 let secs_elapsed = now -. start in
1485 printf "%.0f%%" (100. *. elapsed);
1486 (* After 60 seconds has elapsed, start printing estimates. *)
1487 if secs_elapsed >= 60. then (
1488 let remaining = 1. -. elapsed in
1489 let secs_remaining = (remaining /. elapsed) *. secs_elapsed in
1490 if secs_remaining > 120. then
1491 printf " (about %.0f minutes remaining) "
1492 (secs_remaining /. 60.)
1494 printf " (about %.0f seconds remaining) "
1500 else last_printed_at in
1502 copy bytes_sent last_printed_at
1511 (* Clean up and reboot. *)
1513 msgbox "virt-p2v completed"
1514 (sprintf "\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."
1515 remote_directory conf_filename)
1524 eprintf "usage: virt-p2v [--test] [ttyname]\n%!";
1527 (* Make sure that exceptions from 'main' get printed out on stdout
1528 * as well as stderr, since stderr is probably redirected to the
1529 * logfile, and so not visible to the user.
1531 let handle_exn f arg =
1533 with exn -> print_endline (Printexc.to_string exn); raise exn
1535 (* Test harness for the Makefile. The Makefile invokes this script as
1536 * 'virt-p2v --test' just to check it compiles. When it is running
1537 * from the actual live CD, there is a single parameter which is the
1538 * tty name (so usually 'virt-p2v tty1').
1541 match Array.to_list Sys.argv with
1542 | [ _; ("--help"|"-help"|"-?"|"-h") ] -> usage ();
1543 | [ _; "--test" ] -> () (* Makefile test - do nothing. *)
1544 | [ _; ttyname ] -> (* Run main with ttyname. *)
1545 handle_exn main (Some ttyname)
1546 | [ _ ] -> (* Interactive - no ttyname. *)
1547 handle_exn main None
1550 (* This file must end with a newline *)