From 90e5d501b773686906ed82dbd0bf4c2024d387d3 Mon Sep 17 00:00:00 2001 From: "Richard W.M. Jones" Date: Thu, 1 Jan 1970 00:00:00 +0000 Subject: [PATCH] Finish off first version of conversion. --- virt-p2v.ml | 639 ++++++++++++++++++++++++++++++++++++++++++++++++------------ 1 file changed, 519 insertions(+), 120 deletions(-) diff --git a/virt-p2v.ml b/virt-p2v.ml index a9f23d5..c37271b 100755 --- a/virt-p2v.ml +++ b/virt-p2v.ml @@ -33,12 +33,12 @@ open ExtString type state = { greeting : bool; remote_host : string option; remote_port : string option; - remote_transport : transport option; + transport : transport option; remote_directory : string option; network : network option; devices_to_send : string list option; root_filesystem : partition option } -and transport = SSH | TCP +and transport = Server | SSH | TCP and network = Auto | Shell and partition = Part of string * string (* eg. "hda", "1" *) | LV of string * string (* eg. "VolGroup00", "LogVol00" *) @@ -60,10 +60,10 @@ let defaults = { *) greeting = true; - (* Transport: Set to 'Some SSH' or 'Some TCP' to assume SSH or TCP - * respectively. + (* Transport: Set to 'Some Server' or 'Some SSH' or 'Some TCP' to + * assume Server, SSH or TCP transports respectively. *) - remote_transport = None; + transport = None; (* Remote host and port. Set to 'Some "host"' and 'Some "port"', * else ask the user. @@ -91,7 +91,6 @@ let defaults = { * automatically, or 'Some Shell' (give the user a shell). *) network = None; - } (* END OF CUSTOM virt-p2v SCRIPT SECTION. *) (*----------------------------------------------------------------------*) @@ -107,14 +106,22 @@ let sort_uniq ?(cmp = compare) xs = (* sort and uniq a list *) in loop xs +let input_all_lines chan = + let lines = ref [] in + try + while true do lines := input_line chan :: !lines done; [] + with + End_of_file -> List.rev !lines + let rec string_of_state state = sprintf "greeting: %b remote: %s:%s%s%s network: %s devices: [%s] root: %s" state.greeting (Option.default "" state.remote_host) (Option.default "" state.remote_port) - (match state.remote_transport with - | None -> "" | Some SSH -> " (ssh)" | Some TCP -> " (tcp)") + (match state.transport with + | None -> "" + | Some Server -> " (server)" | Some SSH -> " (ssh)" | Some TCP -> " (tcp)") (match state.remote_directory with | None -> "" | Some dir -> " " ^ dir) (match state.network with @@ -130,79 +137,6 @@ type dialog_status = Yes of string list | No | Help | Back | Error type ask_result = Next of state | Prev | Ask_again -let input_all_lines chan = - let lines = ref [] in - try - while true do lines := input_line chan :: !lines done; [] - with - End_of_file -> List.rev !lines - -(* Same as `cmd` in shell. Any error message will be in the logfile. *) -let shget cmd = - let chan = open_process_in cmd in - let lines = input_all_lines chan in - match close_process_in chan with - | WEXITED 0 -> Some lines (* command succeeded *) - | WEXITED _ -> None (* command failed *) - | WSIGNALED i -> failwith (sprintf "shget: command killed by signal %d" i) - | WSTOPPED i -> failwith (sprintf "shget: command stopped by signal %d" i) - -let is_dir path = (stat path).st_kind = S_DIR - -type block_device = string * int64 (* "hda" & size in bytes *) - -(* Parse the output of 'lvs' to get list of LV names, sizes, - * corresponding PVs, etc. Returns a list of (lvname, PVs, lvsize). - *) -let get_lvs = - let whitespace = Pcre.regexp "[ \t]+" in - let comma = Pcre.regexp "," in - let devname = Pcre.regexp "^/dev/(.+)\\(.+\\)$" in - - function () -> - match - shget "lvs --noheadings -o vg_name,lv_name,devices,lv_size" - with - | None -> [] - | Some lines -> - let lines = List.map (Pcre.split ~rex:whitespace) lines in - List.map ( - function - | [vg; lv; pvs; lvsize] - | [_; vg; lv; pvs; lvsize] -> - let pvs = Pcre.split ~rex:comma pvs in - let pvs = List.map ( - fun pv -> - try - let subs = Pcre.exec ~rex:devname pv in - Pcre.get_substring subs 1 - with - Not_found -> failwith ("lvs: unexpected device name: " ^ pv) - ) pvs in - LV (vg, lv), pvs, lvsize - | line -> - failwith ("lvs: unexpected output: " ^ String.concat "," line) - ) lines - -(* Get the partitions on a block device. - * eg. "sda" -> [Part ("sda","1"); Part ("sda", "2")] - *) -let get_partitions dev = - let rex = Pcre.regexp ("^" ^ dev ^ "(.+)$") in - let devdir = "/sys/block/" ^ dev in - let parts = Sys.readdir devdir in - let parts = Array.to_list parts in - let parts = List.filter (fun name -> is_dir (devdir ^ "/" ^ name)) parts in - let parts = List.filter_map ( - fun part -> - try - let subs = Pcre.exec ~rex part in - Some (Part (dev, Pcre.get_substring subs 1)) - with - Not_found -> None - ) parts in - parts - (* Dialog functions. * * Each function takes some common parameters (eg. ~title) and some @@ -210,12 +144,12 @@ let get_partitions dev = * * Returns the exit status (Yes lines | No | Help | Back | Error). *) -let msgbox, inputbox, radiolist, checklist = +let msgbox, yesno, inputbox, radiolist, checklist = (* Internal function to actually run the "dialog" shell command. *) let run_dialog cparams params = let params = cparams @ params in - eprintf "dialog [%s]\n%!" - (String.concat "; " (List.map (sprintf "%S") params)); + eprintf "dialog %s\n%!" + (String.concat " " (List.map (sprintf "%S") params)); (* 'dialog' writes its output/result to stderr, so we need to take * special steps to capture that - in other words, manual pipe/fork. @@ -252,27 +186,31 @@ let msgbox, inputbox, radiolist, checklist = cont params in - (* Message box. *) - let msgbox = + (* Message box and yes/no box. *) + let rec msgbox = with_common ( fun cparams text height width -> run_dialog cparams [ "--msgbox"; text; string_of_int height; string_of_int width ] ) - in + and yesno = + with_common ( + fun cparams text height width -> + run_dialog cparams + [ "--yesno"; text; string_of_int height; string_of_int width ] + ) (* Simple input box. *) - let inputbox = + and inputbox = with_common ( fun cparams text height width default -> run_dialog cparams [ "--inputbox"; text; string_of_int height; string_of_int width; default ] ) - in (* Radio list and check list. *) - let radiolist = + and radiolist = with_common ( fun cparams text height width listheight items -> let items = List.map ( @@ -287,9 +225,7 @@ let msgbox, inputbox, radiolist, checklist = string_of_int listheight :: items in run_dialog cparams items ) - in - - let checklist = + and checklist = with_common ( fun cparams text height width listheight items -> let items = List.map ( @@ -305,14 +241,241 @@ let msgbox, inputbox, radiolist, checklist = run_dialog cparams items ) in - msgbox, inputbox, radiolist, checklist + msgbox, yesno, inputbox, radiolist, checklist (* Print failure dialog and exit. *) let fail_dialog text = - let text = 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 + 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 ignore (msgbox "Error" text 17 50); exit 1 +(* Shell-safe quoting function. In fact there's one in stdlib so use it. *) +let quote = Filename.quote + +(* Run a shell command and check it returns 0. *) +let sh cmd = + eprintf "sh: %s\n%!" cmd; + if Sys.command cmd <> 0 then fail_dialog (sprintf "Command failed:\n\n%s" cmd) + +let shfailok cmd = + eprintf "shfailok: %s\n%!" cmd; + ignore (Sys.command cmd) + +let shwithstatus cmd = + eprintf "shfailok: %s\n%!" cmd; + Sys.command cmd + +(* Same as `cmd` in shell. Any error message will be in the logfile. *) +let shget cmd = + eprintf "shget: %s\n%!" cmd; + let chan = open_process_in cmd in + let lines = input_all_lines chan in + match close_process_in chan with + | WEXITED 0 -> Some lines (* command succeeded *) + | WEXITED _ -> None (* command failed *) + | WSIGNALED i -> failwith (sprintf "shget: command killed by signal %d" i) + | WSTOPPED i -> failwith (sprintf "shget: command stopped by signal %d" i) + +(* Start an interactive shell. *) +let shell () = + shfailok "PS1='\\u@\\h:\\w\\$ ' bash" + +(* Some true if is dir/file, Some false if not, None if not found. *) +let is_dir path = + try Some ((stat path).st_kind = S_DIR) + with Unix_error (ENOENT, "stat", _) -> None +let is_file path = + try Some ((stat path).st_kind = S_REG) + with Unix_error (ENOENT, "stat", _) -> None + +(* Useful regular expression. *) +let whitespace = Pcre.regexp "[ \t]+" + +(* Generate a predictable safe name containing only letters, numbers + * and underscores. If passed a string with no letters or numbers, + * generates "_1", "_2", etc. + *) +let safe_name = + let next_anon = + let i = ref 0 in + fun () -> incr i; "_" ^ string_of_int !i + in + fun name -> + let is_safe = function 'a'..'z'|'A'..'Z'|'0'..'9' -> true | _ -> false in + let name = String.copy name in + let have_safe = ref false in + for i = 0 to String.length name - 1 do + if not (is_safe name.[i]) then name.[i] <- '_' else have_safe := true + done; + if !have_safe then name else next_anon () + +type block_device = string * int64 (* "hda" & size in bytes *) + +(* Parse the output of 'lvs' to get list of LV names, sizes, + * corresponding PVs, etc. Returns a list of (lvname, PVs, lvsize). + *) +let get_lvs = + let devname = Pcre.regexp "^/dev/(.+)\\(.+\\)$" in + + function () -> + match + shget "lvs --noheadings -o vg_name,lv_name,devices,lv_size" + with + | None -> [] + | Some lines -> + let lines = List.map (Pcre.split ~rex:whitespace) lines in + List.map ( + function + | [vg; lv; pvs; lvsize] + | [_; vg; lv; pvs; lvsize] -> + let pvs = String.nsplit "," pvs in + let pvs = List.map ( + fun pv -> + try + let subs = Pcre.exec ~rex:devname pv in + Pcre.get_substring subs 1 + with + Not_found -> failwith ("lvs: unexpected device name: " ^ pv) + ) pvs in + LV (vg, lv), pvs, lvsize + | line -> + failwith ("lvs: unexpected output: " ^ String.concat "," line) + ) lines + +(* Get the partitions on a block device. + * eg. "sda" -> [Part ("sda","1"); Part ("sda", "2")] + *) +let get_partitions dev = + let rex = Pcre.regexp ("^" ^ dev ^ "(.+)$") in + let devdir = "/sys/block/" ^ dev in + let parts = Sys.readdir devdir in + let parts = Array.to_list parts in + let parts = List.filter ( + fun name -> Some true = is_dir (devdir ^ "/" ^ name) + ) parts in + let parts = List.filter_map ( + fun part -> + try + let subs = Pcre.exec ~rex part in + Some (Part (dev, Pcre.get_substring subs 1)) + with + Not_found -> None + ) parts in + parts + +(* Generate snapshot device name from device name. *) +let snapshot_name dev = + "snap" ^ (safe_name dev) + +(* Perform a device-mapper snapshot with ramdisk overlay. *) +let snapshot = + let next_free_ram_disk = + let i = ref 0 in + fun () -> incr i; "/dev/ram" ^ string_of_int !i + in + fun origin_dev snapshot_dev -> + let ramdisk = next_free_ram_disk () in + let sectors = + let cmd = "blockdev --getsz " ^ quote ("/dev/" ^ origin_dev) in + let lines = shget cmd in + match lines with + | Some (sectors::_) -> Int64.of_string sectors + | Some [] | None -> + fail_dialog (sprintf "Snapshot failed - unable to read the size in sectors of block device %s" origin_dev) in + + (* Create the snapshot origin device. Called, eg. snap_sda1_org *) + sh (sprintf "dmsetup create %s_org --table='0 %Ld snapshot-origin /dev/%s'" + snapshot_dev sectors origin_dev); + (* Create the snapshot. *) + sh (sprintf "dmsetup create %s --table='0 %Ld snapshot /dev/mapper/%s_org %s n 64'" + snapshot_dev sectors snapshot_dev ramdisk) + +(* Try to perform automatic network configuration, assuming a Fedora or RHEL- + * like root filesystem mounted on /mnt/root. + *) +let auto_network state = + (* Fedora gives an error if this file doesn't exist. *) + sh "touch /etc/resolv.conf"; + + chdir "/etc/sysconfig"; + + sh "mv network network.saved"; + sh "mv networking networking.saved"; + sh "mv network-scripts network-scripts.saved"; + + (* Originally I symlinked these, but that causes dhclient to + * keep open /mnt/root (as its cwd is in network-scripts subdir). + * So now we will copy them recursively instead. + *) + sh "cp -r /mnt/root/etc/sysconfig/network ."; + sh "cp -r /mnt/root/etc/sysconfig/networking ."; + sh "cp -r /mnt/root/etc/sysconfig/network-scripts ."; + + let status = shwithstatus "/etc/init.d/network start" in + + sh "rm -rf network networking network-scripts"; + sh "mv network.saved network"; + sh "mv networking.saved networking"; + sh "mv network-scripts.saved network-scripts"; + + chdir "/tmp"; + + (* Try to ping the remote host to see if this worked. *) + sh ("ping -c 3 " ^ Option.map_default quote "" state.remote_host); + + if state.greeting then ( + printf "\n\nDid automatic network configuration work?\n"; + printf "Hint: If not sure, there is a shell on console [ALT] [F2]\n"; + printf " (y/n) %!"; + let line = read_line () in + String.length line > 0 && (line.[0] = 'y' || line.[0] = 'Y') + ) + else + (* Non-interactive: return the status of /etc/init.d/network start. *) + status = 0 + +(* Map local device names to remote devices names. At the moment we + * just change sd* to hd* (as device names appear under fullvirt). In + * future, lots of complex possibilities. + *) +let remote_of_origin_dev = + let devsd = Pcre.regexp "^sd([[:alpha:]]+[[:digit:]]+)$" in + let devsd_subst = Pcre.subst "hd$1" in + fun dev -> + Pcre.replace ~rex:devsd ~itempl:devsd_subst dev + +(* Rewrite /mnt/root/etc/fstab. *) +let rewrite_fstab state devices_to_send = + let filename = "/mnt/root/etc/fstab" in + if is_file filename = Some true then ( + sh ("cp " ^ quote filename ^ " " ^ quote (filename ^ ".p2vsaved")); + + let chan = open_in filename in + let lines = input_all_lines chan in + close_in chan; + let lines = List.map (Pcre.split ~rex:whitespace) lines in + let lines = List.map ( + function + | dev :: rest when String.starts_with dev "/dev/" -> + let dev = String.sub dev 5 (String.length dev - 5) in + let dev = remote_of_origin_dev dev in + let dev = "/dev/" ^ dev in + dev :: rest + | line -> line + ) lines in + + let chan = open_out filename in + List.iter ( + function + | [dev; mountpoint; fstype; options; freq; passno] -> + fprintf chan "%-23s %-23s %-7s %-15s %s %s\n" + dev mountpoint fstype options freq passno + | line -> + output_string chan (String.concat " " line) + ) lines; + close_out chan + ) + (* Main entry point. *) let rec main ttyname = (* Running from an init script. We don't have much of a @@ -363,7 +526,7 @@ let rec main ttyname = *) let devices = List.filter_map ( fun d -> - let cmd = "blockdev --getsize64 /dev/" ^ Filename.quote d in + let cmd = "blockdev --getsize64 " ^ quote ("/dev/" ^ d) in let lines = shget cmd in match lines with | Some (blksize::_) -> Some (d, Int64.of_string blksize) @@ -423,15 +586,19 @@ let rec main ttyname = let ask_transport state = match radiolist "Connection type" ~backbutton:false - "Connection type" 10 50 2 [ - "ssh", "SSH (secure shell - recommended)", - state.remote_transport = Some SSH; + "Connection type. If possible, select 'server' and run P2V server on the remote host" + 10 50 2 [ + "server", "P2V server on remote host", + state.transport = Some Server; + "ssh", "SSH (secure shell)", + state.transport = Some SSH; "tcp", "TCP socket", - state.remote_transport = Some TCP + state.transport = Some TCP ] with - | Yes ("ssh"::_) -> Next { state with remote_transport = Some SSH } - | Yes ("tcp"::_) -> Next { state with remote_transport = Some TCP } + | Yes ("server"::_) -> Next { state with transport = Some Server } + | Yes ("ssh"::_) -> Next { state with transport = Some SSH } + | Yes ("tcp"::_) -> Next { state with transport = Some TCP } | Yes _ | No | Help | Error -> Ask_again | Back -> Prev in @@ -453,10 +620,10 @@ let rec main ttyname = (Option.default "" state.remote_port) with | Yes [] -> - if state.remote_transport = Some TCP then - Next { state with remote_port = Some "16211" } - else - Next { state with remote_port = Some "22" } + (match state.transport with + | Some SSH -> Next { state with remote_port = Some "22" } + | _ -> Next { state with remote_port = Some "16211" } + ) | Yes (port::_) -> Next { state with remote_port = Some port } | No | Help | Error -> Ask_again | Back -> Prev @@ -522,6 +689,37 @@ let rec main ttyname = | Back -> Prev in + let ask_verify state = + match + yesno "Verify and proceed" + (sprintf "\nPlease verify the settings below and click [OK] to proceed, or the [Back] button to return to a previous step. + +Connection: %s +Remote host: %s +Remote port: %s +Directory: %s +Network: %s +Send devices: %s +Root (/) dev: %s" + (match state.transport with + | Some Server -> "Server" + | Some SSH -> "SSH" | Some TCP -> "TCP socket" + | None -> "") + (Option.default "" state.remote_host) + (Option.default "" state.remote_port) + (Option.default "" state.remote_directory) + (match state.network with + | Some Auto -> "Auto-configure" | Some Shell -> "Shell" + | None -> "") + (String.concat "," (Option.default [] state.devices_to_send)) + (Option.map_default dev_of_partition "" state.root_filesystem)) + 18 50 + with + | Yes _ -> Next state + | Back -> Prev + | No | Help | Error -> Ask_again + in + (* This is the list of dialogs, in order. The user can go forwards or * backwards through them. The second parameter in each pair is * false if we need to skip this dialog (info already supplied in @@ -531,7 +729,7 @@ let rec main ttyname = ask_greeting, (* Initial greeting. *) defaults.greeting; ask_transport, (* Transport (ssh, tcp) *) - defaults.remote_transport = None; + defaults.transport = None; ask_hostname, (* Hostname. *) defaults.remote_host = None; ask_port, (* Port number. *) @@ -544,8 +742,8 @@ let rec main ttyname = defaults.devices_to_send = None; ask_root, (* Root filesystem. *) defaults.root_filesystem = None; -(* ask_verify, (* Verify settings. *) - defaults.greeting*) + ask_verify, (* Verify settings. *) + defaults.greeting |] in (* Loop through the dialogs until we reach the end. *) @@ -569,19 +767,218 @@ let rec main ttyname = in let state = loop 0 defaults in - eprintf "finished dialog loop\nstate = %s\n%!" (string_of_state state); - - - - - - - () + eprintf "finished dialog loop\nfinal state = %s\n%!" (string_of_state state); + + (* Check that the environment is a sane-looking live CD. If not, bail. *) + if is_dir "/mnt/root" <> Some true || + is_file "/etc/lvm/lvm.conf.new" <> Some true then + fail_dialog "You should only run this script from the live CD or a USB key."; + + (* Switch LVM config. *) + sh "vgchange -a n"; + sh "mv /etc/lvm/lvm.conf /etc/lvm/lvm.conf.old"; + sh "mv /etc/lvm/lvm.conf.new /etc/lvm/lvm.conf"; + sh "rm -f /etc/lvm/cache/.cache"; + + (* Snapshot the block devices to send. *) + let devices_to_send = Option.get state.devices_to_send in + let devices_to_send = + List.map ( + fun origin_dev -> + let snapshot_dev = snapshot_name origin_dev in + snapshot origin_dev snapshot_dev; + (origin_dev, snapshot_dev) + ) devices_to_send in + + (* Run kpartx on the snapshots. *) + List.iter ( + fun (origin, snapshot) -> + shfailok ("kpartx -a " ^ quote ("/dev/mapper/" ^ snapshot)) + ) devices_to_send; + + (* Rescan for LVs. *) + sh "vgscan"; + sh "vgchange -a y"; + + (* Mount the root filesystem under /mnt/root. *) + let root_filesystem = Option.get state.root_filesystem in + (match root_filesystem with + | Part (dev, partnum) -> + let dev = dev ^ partnum in + let snapshot_dev = snapshot_name dev in + sh ("mount " ^ quote ("/dev/mapper/" ^ snapshot_dev) ^ " /mnt/root") + + | LV (vg, lv) -> + (* The LV will be backed by a snapshot device, so just mount directly. *) + sh ("mount " ^ quote ("/dev/" ^ vg ^ "/" ^ lv) ^ " /mnt/root") + ); + + (* See if we can do network configuration. *) + let network = Option.get state.network in + (match network with + | Shell -> + printf "Network configuration.\n\n"; + printf "Please configure the network from this shell.\n\n"; + printf "When you have finished, exit the shell with ^D or exit.\n\n"; + shell () + + | Auto -> + printf "Trying network auto-configuration from root filesystem ...\n\n"; + if not (auto_network state) then ( + printf "\nAuto-configuration failed. Starting a shell.\n\n"; + printf "Please configure the network from this shell.\n\n"; + printf "When you have finished, exit the shell with ^D or exit.\n\n"; + shell () + ) + ); + + (* Work out what devices will be called at the remote end. *) + let devices_to_send = List.map ( + fun (origin_dev, snapshot_dev) -> + let remote_dev = remote_of_origin_dev origin_dev in + (origin_dev, snapshot_dev, remote_dev) + ) devices_to_send in + + rewrite_fstab state devices_to_send; + (* XXX Other files to rewrite? *) + + (* Unmount the root filesystem and sync disks. *) + sh "umount /mnt/root"; + sh "sync"; (* Ugh, should be in stdlib. *) + + (* For Server and TCP type connections, we connect just once. *) + let remote_host = Option.get state.remote_host in + let remote_port = Option.get state.remote_port in + let remote_directory = Option.get state.remote_directory in + let transport = Option.get state.transport in + + let sock = + match transport with + | Server | TCP -> + let addrs = + getaddrinfo remote_host remote_port [AI_SOCKTYPE SOCK_STREAM] in + let rec loop = function + | [] -> + fail_dialog + (sprintf "Unable to connect to %s:%s" remote_host remote_port) + | addr :: addrs -> + try + let sock = + socket addr.ai_family addr.ai_socktype addr.ai_protocol in + connect sock addr.ai_addr; + sock + with Unix_error (err, syscall, extra) -> + (* Log the error message, but continue around the loop. *) + eprintf "%s:%s: %s\n%!" syscall extra (error_message err); + loop addrs + in + loop addrs + | SSH -> + (* Just dummy socket for SSH for now ... *) stdin in + + (* Send the device snapshots to the remote host. *) + (* XXX This is using the hostname derived from network configuration + * above. We might want to ask the user to choose. + *) + let basename = + let hostname = safe_name (gethostname ()) in + let date = sprintf "%04d%02d%02d%02d%02d" + (tm.tm_year+1900) (tm.tm_mon+1) tm.tm_mday tm.tm_hour tm.tm_min in + "p2v-" ^ hostname ^ "-" ^ date in + + (* XXX This code should be made more robust against both network + * errors and local I/O errors. Also should allow the user several + * attempts to connect, or let them go back to the dialog stage. + *) + List.iter ( + fun (origin_dev, snapshot_dev, remote_dev) -> + let remote_name = basename ^ "-" ^ remote_dev ^ ".img" in + eprintf "sending %s as %s\n%!" origin_dev remote_name; + + let size = + try List.assoc origin_dev all_block_devices + with Not_found -> assert false (* internal error *) in + + printf "Sending /dev/%s (%.3f GB) to remote machine\n%!" origin_dev + ((Int64.to_float size) /. (1024.*.1024.*.1024.)); + + (* Open the snapshot device. *) + let fd = openfile ("/dev/mapper/" ^ snapshot_dev) [O_RDONLY] 0 in + + (* Now connect (for SSH) or send the header (for Server/TCP). *) + let sock, chan = + match transport with + | Server | TCP -> + let header = sprintf "p2v2 %s %Ld\n%!" remote_name size in + let len = String.length header in + assert (len = write sock header 0 len); + sock, Pervasives.stdout + | SSH -> + let cmd = sprintf "ssh -C -p %s %s \"cat > %s/%s\"" + (quote remote_port) (quote remote_host) + (quote remote_directory) (quote remote_name) in + let chan = open_process_out cmd in + let fd = descr_of_out_channel chan in + fd, chan in + + (* Copy the data. *) + let bufsize = 128 * 1024 in + let buffer = String.create bufsize in + + let rec copy () = + let n = read fd buffer 0 bufsize in + if n > 0 then ( + ignore (write sock buffer 0 n); + copy () + ) + in + copy (); + + (* For SSH disconnect, for Server/TCP send a newline. *) + match transport with + | Server | TCP -> + ignore (write sock "\n" 0 1) + | SSH -> + match close_process_out chan with + | WEXITED 0 -> () (* OK *) + | WEXITED i -> failwith (sprintf "ssh: exited with error code %d" i) + | WSIGNALED i -> failwith (sprintf "ssh: killed by signal %d" i) + | WSTOPPED i -> failwith (sprintf "ssh: stopped by signal %d" i) + ) devices_to_send; + + (* Disconnect. *) + (match transport with + | Server | TCP -> close sock + | SSH -> () + ); + + (* XXX Write a configuration file. *) + let conf_filename = basename ^ ".conf" in + + (* Clean up and reboot. *) + ignore ( + msgbox "virt-p2v completed" + (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\nvirsh define %s/%s\n\nWhen you press [OK] this machine will reboot." + (Option.default "" state.remote_directory) conf_filename) + 17 50 + ); + + shfailok "eject"; + shfailok "reboot"; + exit 0 let usage () = eprintf "usage: virt-p2v [ttyname]\n%!"; exit 2 +(* Make sure that exceptions from 'main' get printed out on stdout + * as well as stderr, since stderr is probably redirected to the + * logfile, and so not visible to the user. + *) +let handle_exn f arg = + try f arg + with exn -> print_endline (Printexc.to_string exn); raise exn + (* Test harness for the Makefile. The Makefile invokes this script as * 'virt-p2v.ml --test' just to check it compiles. When it is running * from the actual live CD, there is a single parameter which is the @@ -589,8 +986,10 @@ let usage () = *) let () = match Array.to_list Sys.argv with - | [ _; "--test" ] -> () (* Makefile test - do nothing. *) + | [ _; "--test" ] -> () (* Makefile test - do nothing. *) | [ _; ("--help"|"-help"|"-?"|"-h") ] -> usage (); - | [ _; ttyname ] -> main (Some ttyname) (* Run main with ttyname. *) - | [ _ ] -> main None (* Interactive - no ttyname. *) + | [ _; ttyname ] -> + handle_exn main (Some ttyname) (* Run main with ttyname. *) + | [ _ ] -> + handle_exn main None (* Interactive - no ttyname. *) | _ -> usage () -- 1.8.3.1