PVE/QemuMigrate.pm

   1 package PVE::QemuMigrate;
   2
   3 use strict;
   4 use warnings;
   5 use PVE::AbstractMigrate;
   6 use IO::File;
   7 use IPC::Open2;
   8 use POSIX qw( WNOHANG );
   9 use PVE::INotify;
  10 use PVE::Tools;
  11 use PVE::Cluster;
  12 use PVE::Storage;
  13 use PVE::QemuServer;
  14 use PVE::QemuServer::Machine;
  15 use PVE::QemuServer::Monitor qw(mon_cmd);
  16 use Time::HiRes qw( usleep );
  17 use PVE::RPCEnvironment;
  18 use PVE::ReplicationConfig;
  19 use PVE::ReplicationState;
  20 use PVE::Replication;
  21
  22 use base qw(PVE::AbstractMigrate);
  23
  24 sub fork_command_pipe {
  25     my ($self, $cmd) = @_;
  26
  27     my $reader = IO::File->new();
  28     my $writer = IO::File->new();
  29
  30     my $orig_pid = $$;
  31
  32     my $cpid;
  33
  34     eval { $cpid = open2($reader, $writer, @$cmd); };
  35
  36     my $err = $@;
  37
  38     # catch exec errors
  39     if ($orig_pid != $$) {
  40         $self->log('err', "can't fork command pipe\n");
  41         POSIX::_exit(1);
  42         kill('KILL', $$);
  43     }
  44
  45     die $err if $err;
  46
  47     return { writer => $writer, reader => $reader, pid => $cpid };
  48 }
  49
  50 sub finish_command_pipe {
  51     my ($self, $cmdpipe, $timeout) = @_;
  52
  53     my $cpid = $cmdpipe->{pid};
  54     return if !defined($cpid);
  55
  56     my $writer = $cmdpipe->{writer};
  57     my $reader = $cmdpipe->{reader};
  58
  59     $writer->close();
  60     $reader->close();
  61
  62     my $collect_child_process = sub {
  63         my $res = waitpid($cpid, WNOHANG);
  64         if (defined($res) && ($res == $cpid)) {
  65             delete $cmdpipe->{cpid};
  66             return 1;
  67         } else {
  68             return 0;
  69         }
  70      };
  71
  72     if ($timeout) {
  73         for (my $i = 0; $i < $timeout; $i++) {
  74             return if &$collect_child_process();
  75             sleep(1);
  76         }
  77     }
  78
  79     $self->log('info', "ssh tunnel still running - terminating now with SIGTERM\n");
  80     kill(15, $cpid);
  81
  82     # wait again
  83     for (my $i = 0; $i < 10; $i++) {
  84         return if &$collect_child_process();
  85         sleep(1);
  86     }
  87
  88     $self->log('info', "ssh tunnel still running - terminating now with SIGKILL\n");
  89     kill 9, $cpid;
  90     sleep 1;
  91
  92     $self->log('err', "ssh tunnel child process (PID $cpid) couldn't be collected\n")
  93         if !&$collect_child_process();
  94 }
  95
  96 sub read_tunnel {
  97     my ($self, $tunnel, $timeout) = @_;
  98
  99     $timeout = 60 if !defined($timeout);
 100
 101     my $reader = $tunnel->{reader};
 102
 103     my $output;
 104     eval {
 105         PVE::Tools::run_with_timeout($timeout, sub { $output = <$reader>; });
 106     };
 107     die "reading from tunnel failed: $@\n" if $@;
 108
 109     chomp $output;
 110
 111     return $output;
 112 }
 113
 114 sub write_tunnel {
 115     my ($self, $tunnel, $timeout, $command) = @_;
 116
 117     $timeout = 60 if !defined($timeout);
 118
 119     my $writer = $tunnel->{writer};
 120
 121     eval {
 122         PVE::Tools::run_with_timeout($timeout, sub {
 123             print $writer "$command\n";
 124             $writer->flush();
 125         });
 126     };
 127     die "writing to tunnel failed: $@\n" if $@;
 128
 129     if ($tunnel->{version} && $tunnel->{version} >= 1) {
 130         my $res = eval { $self->read_tunnel($tunnel, 10); };
 131         die "no reply to command '$command': $@\n" if $@;
 132
 133         if ($res eq 'OK') {
 134             return;
 135         } else {
 136             die "tunnel replied '$res' to command '$command'\n";
 137         }
 138     }
 139 }
 140
 141 sub fork_tunnel {
 142     my ($self, $tunnel_addr) = @_;
 143
 144     my @localtunnelinfo = defined($tunnel_addr) ? ('-L' , $tunnel_addr ) : ();
 145
 146     my $cmd = [@{$self->{rem_ssh}}, '-o ExitOnForwardFailure=yes', @localtunnelinfo, '/usr/sbin/qm', 'mtunnel' ];
 147
 148     my $tunnel = $self->fork_command_pipe($cmd);
 149
 150     eval {
 151         my $helo = $self->read_tunnel($tunnel, 60);
 152         die "no reply\n" if !$helo;
 153         die "no quorum on target node\n" if $helo =~ m/^no quorum$/;
 154         die "got strange reply from mtunnel ('$helo')\n"
 155             if $helo !~ m/^tunnel online$/;
 156     };
 157     my $err = $@;
 158
 159     eval {
 160         my $ver = $self->read_tunnel($tunnel, 10);
 161         if ($ver =~ /^ver (\d+)$/) {
 162             $tunnel->{version} = $1;
 163             $self->log('info', "ssh tunnel $ver\n");
 164         } else {
 165             $err = "received invalid tunnel version string '$ver'\n" if !$err;
 166         }
 167     };
 168
 169     if ($err) {
 170         $self->finish_command_pipe($tunnel);
 171         die "can't open migration tunnel - $err";
 172     }
 173     return $tunnel;
 174 }
 175
 176 sub finish_tunnel {
 177     my ($self, $tunnel) = @_;
 178
 179     eval { $self->write_tunnel($tunnel, 30, 'quit'); };
 180     my $err = $@;
 181
 182     $self->finish_command_pipe($tunnel, 30);
 183
 184     if ($tunnel->{sock_addr}) {
 185         # ssh does not clean up on local host
 186         my $cmd = ['rm', '-f', $tunnel->{sock_addr}]; #
 187         PVE::Tools::run_command($cmd);
 188
 189         # .. and just to be sure check on remote side
 190         unshift @{$cmd}, @{$self->{rem_ssh}};
 191         PVE::Tools::run_command($cmd);
 192     }
 193
 194     die $err if $err;
 195 }
 196
 197 sub lock_vm {
 198     my ($self, $vmid, $code, @param) = @_;
 199
 200     return PVE::QemuConfig->lock_config($vmid, $code, @param);
 201 }
 202
 203 sub prepare {
 204     my ($self, $vmid) = @_;
 205
 206     my $online = $self->{opts}->{online};
 207
 208     $self->{storecfg} = PVE::Storage::config();
 209
 210     # test if VM exists
 211     my $conf = $self->{vmconf} = PVE::QemuConfig->load_config($vmid);
 212
 213     PVE::QemuConfig->check_lock($conf);
 214
 215     my $running = 0;
 216     if (my $pid = PVE::QemuServer::check_running($vmid)) {
 217         die "can't migrate running VM without --online\n" if !$online;
 218         $running = $pid;
 219
 220         $self->{forcemachine} = PVE::QemuServer::Machine::qemu_machine_pxe($vmid, $conf);
 221
 222     }
 223     my $loc_res = PVE::QemuServer::check_local_resources($conf, 1);
 224     if (scalar @$loc_res) {
 225         if ($self->{running} || !$self->{opts}->{force}) {
 226             die "can't migrate VM which uses local devices: " . join(", ", @$loc_res) . "\n";
 227         } else {
 228             $self->log('info', "migrating VM which uses local devices");
 229         }
 230     }
 231
 232     my $vollist = PVE::QemuServer::get_vm_volumes($conf);
 233
 234     my $need_activate = [];
 235     foreach my $volid (@$vollist) {
 236         my ($sid, $volname) = PVE::Storage::parse_volume_id($volid, 1);
 237
 238         # check if storage is available on both nodes
 239         my $targetsid = $self->{opts}->{targetstorage} // $sid;
 240
 241         my $scfg = PVE::Storage::storage_check_node($self->{storecfg}, $sid);
 242         PVE::Storage::storage_check_node($self->{storecfg}, $targetsid, $self->{node});
 243
 244         if ($scfg->{shared}) {
 245             # PVE::Storage::activate_storage checks this for non-shared storages
 246             my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
 247             warn "Used shared storage '$sid' is not online on source node!\n"
 248                 if !$plugin->check_connection($sid, $scfg);
 249         } else {
 250             # only activate if not shared
 251             next if ($volid =~ m/vm-\d+-cloudinit/);
 252             push @$need_activate, $volid;
 253         }
 254     }
 255
 256     # activate volumes
 257     PVE::Storage::activate_volumes($self->{storecfg}, $need_activate);
 258
 259     # test ssh connection
 260     my $cmd = [ @{$self->{rem_ssh}}, '/bin/true' ];
 261     eval { $self->cmd_quiet($cmd); };
 262     die "Can't connect to destination address using public key\n" if $@;
 263
 264     return $running;
 265 }
 266
 267 sub sync_disks {
 268     my ($self, $vmid) = @_;
 269
 270     my $conf = $self->{vmconf};
 271
 272     # local volumes which have been copied
 273     $self->{volumes} = [];
 274
 275     my $override_targetsid = $self->{opts}->{targetstorage};
 276
 277     eval {
 278
 279         # found local volumes and their origin
 280         my $local_volumes = {};
 281         my $local_volumes_errors = {};
 282         my $other_errors = [];
 283         my $abort = 0;
 284
 285         my $sharedvm = 1;
 286
 287         my $log_error = sub {
 288             my ($msg, $volid) = @_;
 289
 290             if (defined($volid)) {
 291                 $local_volumes_errors->{$volid} = $msg;
 292             } else {
 293                 push @$other_errors, $msg;
 294             }
 295             $abort = 1;
 296         };
 297
 298         my @sids = PVE::Storage::storage_ids($self->{storecfg});
 299         foreach my $storeid (@sids) {
 300             my $scfg = PVE::Storage::storage_config($self->{storecfg}, $storeid);
 301             next if $scfg->{shared};
 302             next if !PVE::Storage::storage_check_enabled($self->{storecfg}, $storeid, undef, 1);
 303
 304             # get list from PVE::Storage (for unused volumes)
 305             my $dl = PVE::Storage::vdisk_list($self->{storecfg}, $storeid, $vmid);
 306
 307             next if @{$dl->{$storeid}} == 0;
 308
 309             my $targetsid = $override_targetsid // $storeid;
 310
 311             # check if storage is available on target node
 312             PVE::Storage::storage_check_node($self->{storecfg}, $targetsid, $self->{node});
 313             $sharedvm = 0; # there is a non-shared disk
 314
 315             PVE::Storage::foreach_volid($dl, sub {
 316                 my ($volid, $sid, $volname) = @_;
 317
 318                 $local_volumes->{$volid}->{ref} = 'storage';
 319             });
 320         }
 321
 322         my $test_volid = sub {
 323             my ($volid, $attr) = @_;
 324
 325             if ($volid =~ m|^/|) {
 326                 return if $attr->{shared};
 327                 $local_volumes->{$volid}->{ref} = 'config';
 328                 die "local file/device\n";
 329             }
 330
 331             my $snaprefs = $attr->{referenced_in_snapshot};
 332
 333             if ($attr->{cdrom}) {
 334                 if ($volid eq 'cdrom') {
 335                     my $msg = "can't migrate local cdrom drive";
 336                     if (defined($snaprefs) && !$attr->{referenced_in_config}) {
 337                         my $snapnames = join(', ', sort keys %$snaprefs);
 338                         $msg .= " (referenced in snapshot - $snapnames)";
 339                     }
 340                     &$log_error("$msg\n");
 341                     return;
 342                 }
 343                 return if $volid eq 'none';
 344             }
 345
 346             my ($sid, $volname) = PVE::Storage::parse_volume_id($volid);
 347
 348             my $targetsid = $override_targetsid // $sid;
 349             # check if storage is available on both nodes
 350             my $scfg = PVE::Storage::storage_check_node($self->{storecfg}, $sid);
 351             PVE::Storage::storage_check_node($self->{storecfg}, $targetsid, $self->{node});
 352
 353             return if $scfg->{shared};
 354
 355             $sharedvm = 0;
 356
 357             $local_volumes->{$volid}->{ref} = $attr->{referenced_in_config} ? 'config' : 'snapshot';
 358
 359             if ($attr->{cdrom}) {
 360                 if ($volid =~ /vm-\d+-cloudinit/) {
 361                     $local_volumes->{$volid}->{ref} = 'generated';
 362                     return;
 363                 }
 364                 die "local cdrom image\n";
 365             }
 366
 367             my ($path, $owner) = PVE::Storage::path($self->{storecfg}, $volid);
 368
 369             die "owned by other VM (owner = VM $owner)\n"
 370                 if !$owner || ($owner != $self->{vmid});
 371
 372             my $format = PVE::QemuServer::qemu_img_format($scfg, $volname);
 373             $local_volumes->{$volid}->{snapshots} = defined($snaprefs) || ($format =~ /^(?:qcow2|vmdk)$/);
 374             if (defined($snaprefs)) {
 375                 # we cannot migrate shapshots on local storage
 376                 # exceptions: 'zfspool' or 'qcow2' files (on directory storage)
 377
 378                 die "online storage migration not possible if snapshot exists\n" if $self->{running};
 379                 if (!($scfg->{type} eq 'zfspool' || $format eq 'qcow2')) {
 380                     die "non-migratable snapshot exists\n";
 381                 }
 382             }
 383
 384             die "referenced by linked clone(s)\n"
 385                 if PVE::Storage::volume_is_base_and_used($self->{storecfg}, $volid);
 386         };
 387
 388         PVE::QemuServer::foreach_volid($conf, sub {
 389             my ($volid, $attr) = @_;
 390             eval { $test_volid->($volid, $attr); };
 391             if (my $err = $@) {
 392                 &$log_error($err, $volid);
 393             }
 394         });
 395
 396         foreach my $vol (sort keys %$local_volumes) {
 397             my $ref = $local_volumes->{$vol}->{ref};
 398             if ($ref eq 'storage') {
 399                 $self->log('info', "found local disk '$vol' (via storage)\n");
 400             } elsif ($ref eq 'config') {
 401                 &$log_error("can't live migrate attached local disks without with-local-disks option\n", $vol)
 402                     if $self->{running} && !$self->{opts}->{"with-local-disks"};
 403                 $self->log('info', "found local disk '$vol' (in current VM config)\n");
 404             } elsif ($ref eq 'snapshot') {
 405                 $self->log('info', "found local disk '$vol' (referenced by snapshot(s))\n");
 406             } elsif ($ref eq 'generated') {
 407                 $self->log('info', "found generated disk '$vol' (in current VM config)\n");
 408             } else {
 409                 $self->log('info', "found local disk '$vol'\n");
 410             }
 411         }
 412
 413         foreach my $vol (sort keys %$local_volumes_errors) {
 414             $self->log('warn', "can't migrate local disk '$vol': $local_volumes_errors->{$vol}");
 415         }
 416         foreach my $err (@$other_errors) {
 417             $self->log('warn', "$err");
 418         }
 419
 420         if ($abort) {
 421             die "can't migrate VM - check log\n";
 422         }
 423
 424         # additional checks for local storage
 425         foreach my $volid (keys %$local_volumes) {
 426             my ($sid, $volname) = PVE::Storage::parse_volume_id($volid);
 427             my $scfg =  PVE::Storage::storage_config($self->{storecfg}, $sid);
 428
 429             my $migratable = $scfg->{type} =~ /^(?:dir|zfspool|lvmthin|lvm)$/;
 430
 431             die "can't migrate '$volid' - storage type '$scfg->{type}' not supported\n"
 432                 if !$migratable;
 433
 434             # image is a linked clone on local storage, se we can't migrate.
 435             if (my $basename = (PVE::Storage::parse_volname($self->{storecfg}, $volid))[3]) {
 436                 die "can't migrate '$volid' as it's a clone of '$basename'";
 437             }
 438         }
 439
 440         my $rep_cfg = PVE::ReplicationConfig->new();
 441         if (my $jobcfg = $rep_cfg->find_local_replication_job($vmid, $self->{node})) {
 442             die "can't live migrate VM with replicated volumes\n" if $self->{running};
 443             $self->log('info', "replicating disk images");
 444             my $start_time = time();
 445             my $logfunc = sub { $self->log('info', shift) };
 446             $self->{replicated_volumes} = PVE::Replication::run_replication(
 447                'PVE::QemuConfig', $jobcfg, $start_time, $start_time, $logfunc);
 448         }
 449
 450         $self->log('info', "copying local disk images") if scalar(%$local_volumes);
 451
 452         foreach my $volid (keys %$local_volumes) {
 453             my ($sid, $volname) = PVE::Storage::parse_volume_id($volid);
 454             my $targetsid = $override_targetsid // $sid;
 455             my $ref = $local_volumes->{$volid}->{ref};
 456             if ($self->{running} && $ref eq 'config') {
 457                 push @{$self->{online_local_volumes}}, $volid;
 458             } elsif ($ref eq 'generated') {
 459                 die "can't live migrate VM with local cloudinit disk. use a shared storage instead\n" if $self->{running};
 460                 # skip all generated volumes but queue them for deletion in phase3_cleanup
 461                 push @{$self->{volumes}}, $volid;
 462                 next;
 463             } else {
 464                 next if $self->{replicated_volumes}->{$volid};
 465                 push @{$self->{volumes}}, $volid;
 466                 my $opts = $self->{opts};
 467                 my $insecure = $opts->{migration_type} eq 'insecure';
 468                 my $with_snapshots = $local_volumes->{$volid}->{snapshots};
 469                 # use 'migrate' limit for transfer to other node
 470                 my $bwlimit = PVE::Storage::get_bandwidth_limit('migrate', [$targetsid, $sid], $opts->{bwlimit});
 471                 # JSONSchema and get_bandwidth_limit use kbps - storage_migrate bps
 472                 $bwlimit = $bwlimit * 1024 if defined($bwlimit);
 473
 474                 PVE::Storage::storage_migrate($self->{storecfg}, $volid, $self->{ssh_info}, $targetsid,
 475                                               undef, undef, undef, $bwlimit, $insecure, $with_snapshots);
 476             }
 477         }
 478     };
 479     die "Failed to sync data - $@" if $@;
 480 }
 481
 482 sub cleanup_remotedisks {
 483     my ($self) = @_;
 484
 485     foreach my $target_drive (keys %{$self->{target_drive}}) {
 486
 487         my $drive = PVE::QemuServer::parse_drive($target_drive, $self->{target_drive}->{$target_drive}->{volid});
 488         my ($storeid, $volname) = PVE::Storage::parse_volume_id($drive->{file});
 489
 490         my $cmd = [@{$self->{rem_ssh}}, 'pvesm', 'free', "$storeid:$volname"];
 491
 492         eval{ PVE::Tools::run_command($cmd, outfunc => sub {}, errfunc => sub {}) };
 493         if (my $err = $@) {
 494             $self->log('err', $err);
 495             $self->{errors} = 1;
 496         }
 497     }
 498 }
 499
 500 sub phase1 {
 501     my ($self, $vmid) = @_;
 502
 503     $self->log('info', "starting migration of VM $vmid to node '$self->{node}' ($self->{nodeip})");
 504
 505     my $conf = $self->{vmconf};
 506
 507     # set migrate lock in config file
 508     $conf->{lock} = 'migrate';
 509     PVE::QemuConfig->write_config($vmid, $conf);
 510
 511     sync_disks($self, $vmid);
 512
 513 };
 514
 515 sub phase1_cleanup {
 516     my ($self, $vmid, $err) = @_;
 517
 518     $self->log('info', "aborting phase 1 - cleanup resources");
 519
 520     my $conf = $self->{vmconf};
 521     delete $conf->{lock};
 522     eval { PVE::QemuConfig->write_config($vmid, $conf) };
 523     if (my $err = $@) {
 524         $self->log('err', $err);
 525     }
 526
 527     if ($self->{volumes}) {
 528         foreach my $volid (@{$self->{volumes}}) {
 529             $self->log('err', "found stale volume copy '$volid' on node '$self->{node}'");
 530             # fixme: try to remove ?
 531         }
 532     }
 533 }
 534
 535 sub phase2 {
 536     my ($self, $vmid) = @_;
 537
 538     my $conf = $self->{vmconf};
 539
 540     $self->log('info', "starting VM $vmid on remote node '$self->{node}'");
 541
 542     my $raddr;
 543     my $rport;
 544     my $ruri; # the whole migration dst. URI (protocol:address[:port])
 545     my $nodename = PVE::INotify::nodename();
 546
 547     ## start on remote node
 548     my $cmd = [@{$self->{rem_ssh}}];
 549
 550     my $spice_ticket;
 551     if (PVE::QemuServer::vga_conf_has_spice($conf->{vga})) {
 552         my $res = mon_cmd($vmid, 'query-spice');
 553         $spice_ticket = $res->{ticket};
 554     }
 555
 556     push @$cmd , 'qm', 'start', $vmid, '--skiplock', '--migratedfrom', $nodename;
 557
 558     my $migration_type = $self->{opts}->{migration_type};
 559
 560     push @$cmd, '--migration_type', $migration_type;
 561
 562     push @$cmd, '--migration_network', $self->{opts}->{migration_network}
 563       if $self->{opts}->{migration_network};
 564
 565     if ($migration_type eq 'insecure') {
 566         push @$cmd, '--stateuri', 'tcp';
 567     } else {
 568         push @$cmd, '--stateuri', 'unix';
 569     }
 570
 571     if ($self->{forcemachine}) {
 572         push @$cmd, '--machine', $self->{forcemachine};
 573     }
 574
 575     if ($self->{online_local_volumes}) {
 576         push @$cmd, '--targetstorage', ($self->{opts}->{targetstorage} // '1');
 577     }
 578
 579     my $spice_port;
 580
 581     # Note: We try to keep $spice_ticket secret (do not pass via command line parameter)
 582     # instead we pipe it through STDIN
 583     PVE::Tools::run_command($cmd, input => $spice_ticket, outfunc => sub {
 584         my $line = shift;
 585
 586         if ($line =~ m/^migration listens on tcp:(localhost|[\d\.]+|\[[\d\.:a-fA-F]+\]):(\d+)$/) {
 587             $raddr = $1;
 588             $rport = int($2);
 589             $ruri = "tcp:$raddr:$rport";
 590         }
 591         elsif ($line =~ m!^migration listens on unix:(/run/qemu-server/(\d+)\.migrate)$!) {
 592             $raddr = $1;
 593             die "Destination UNIX sockets VMID does not match source VMID" if $vmid ne $2;
 594             $ruri = "unix:$raddr";
 595         }
 596         elsif ($line =~ m/^migration listens on port (\d+)$/) {
 597             $raddr = "localhost";
 598             $rport = int($1);
 599             $ruri = "tcp:$raddr:$rport";
 600         }
 601         elsif ($line =~ m/^spice listens on port (\d+)$/) {
 602             $spice_port = int($1);
 603         }
 604         elsif ($line =~ m/^storage migration listens on nbd:(localhost|[\d\.]+|\[[\d\.:a-fA-F]+\]):(\d+):exportname=(\S+) volume:(\S+)$/) {
 605             my $volid = $4;
 606             my $nbd_uri = "nbd:$1:$2:exportname=$3";
 607             my $targetdrive = $3;
 608             $targetdrive =~ s/drive-//g;
 609
 610             $self->{target_drive}->{$targetdrive}->{volid} = $volid;
 611             $self->{target_drive}->{$targetdrive}->{nbd_uri} = $nbd_uri;
 612
 613         }
 614     }, errfunc => sub {
 615         my $line = shift;
 616         $self->log('info', $line);
 617     });
 618
 619     die "unable to detect remote migration address\n" if !$raddr;
 620
 621     $self->log('info', "start remote tunnel");
 622
 623     if ($migration_type eq 'secure') {
 624
 625         if ($ruri =~ /^unix:/) {
 626             unlink $raddr;
 627             $self->{tunnel} = $self->fork_tunnel("$raddr:$raddr");
 628             $self->{tunnel}->{sock_addr} = $raddr;
 629
 630             my $unix_socket_try = 0; # wait for the socket to become ready
 631             while (! -S $raddr) {
 632                 $unix_socket_try++;
 633                 if ($unix_socket_try > 100) {
 634                     $self->{errors} = 1;
 635                     $self->finish_tunnel($self->{tunnel});
 636                     die "Timeout, migration socket $ruri did not get ready";
 637                 }
 638
 639                 usleep(50000);
 640             }
 641
 642         } elsif ($ruri =~ /^tcp:/) {
 643             my $tunnel_addr;
 644             if ($raddr eq "localhost") {
 645                 # for backwards compatibility with older qemu-server versions
 646                 my $pfamily = PVE::Tools::get_host_address_family($nodename);
 647                 my $lport = PVE::Tools::next_migrate_port($pfamily);
 648                 $tunnel_addr = "$lport:localhost:$rport";
 649             }
 650
 651             $self->{tunnel} = $self->fork_tunnel($tunnel_addr);
 652
 653         } else {
 654             die "unsupported protocol in migration URI: $ruri\n";
 655         }
 656     } else {
 657         #fork tunnel for insecure migration, to send faster commands like resume
 658         $self->{tunnel} = $self->fork_tunnel();
 659     }
 660
 661     my $start = time();
 662
 663     my $opt_bwlimit = $self->{opts}->{bwlimit};
 664
 665     if (defined($self->{online_local_volumes})) {
 666         $self->{storage_migration} = 1;
 667         $self->{storage_migration_jobs} = {};
 668         $self->log('info', "starting storage migration");
 669
 670         die "The number of local disks does not match between the source and the destination.\n"
 671             if (scalar(keys %{$self->{target_drive}}) != scalar @{$self->{online_local_volumes}});
 672         foreach my $drive (keys %{$self->{target_drive}}){
 673             my $target = $self->{target_drive}->{$drive};
 674             my $nbd_uri = $target->{nbd_uri};
 675             my $source_sid = PVE::Storage::Plugin::parse_volume_id($conf->{$drive});
 676             my $target_sid = PVE::Storage::Plugin::parse_volume_id($target->{volid});
 677             my $bwlimit = PVE::Storage::get_bandwidth_limit('migrate', [$source_sid, $target_sid], $opt_bwlimit);
 678
 679             $self->log('info', "$drive: start migration to $nbd_uri");
 680             PVE::QemuServer::qemu_drive_mirror($vmid, $drive, $nbd_uri, $vmid, undef, $self->{storage_migration_jobs}, 1, undef, $bwlimit);
 681         }
 682     }
 683
 684     $self->log('info', "starting online/live migration on $ruri");
 685     $self->{livemigration} = 1;
 686
 687     # load_defaults
 688     my $defaults = PVE::QemuServer::load_defaults();
 689
 690     # migrate speed can be set via bwlimit (datacenter.cfg and API) and via the
 691     # migrate_speed parameter in qm.conf - take the lower of the two.
 692     my $bwlimit = PVE::Storage::get_bandwidth_limit('migrate', undef, $opt_bwlimit) // 0;
 693     my $migrate_speed = $conf->{migrate_speed} // $bwlimit;
 694     # migrate_speed is in MB/s, bwlimit in KB/s
 695     $migrate_speed *= 1024;
 696
 697     $migrate_speed = ($bwlimit < $migrate_speed) ? $bwlimit : $migrate_speed;
 698
 699     # always set migrate speed (overwrite kvm default of 32m) we set a very high
 700     # default of 8192m which is basically unlimited
 701     $migrate_speed ||= ($defaults->{migrate_speed} || 8192) * 1024;
 702
 703     # qmp takes migrate_speed in B/s.
 704     $migrate_speed *= 1024;
 705     $self->log('info', "migrate_set_speed: $migrate_speed");
 706     eval {
 707         mon_cmd($vmid, "migrate_set_speed", value => int($migrate_speed));
 708     };
 709     $self->log('info', "migrate_set_speed error: $@") if $@;
 710
 711     my $migrate_downtime = $defaults->{migrate_downtime};
 712     $migrate_downtime = $conf->{migrate_downtime} if defined($conf->{migrate_downtime});
 713     if (defined($migrate_downtime)) {
 714         $self->log('info', "migrate_set_downtime: $migrate_downtime");
 715         eval {
 716             mon_cmd($vmid, "migrate_set_downtime", value => int($migrate_downtime*100)/100);
 717         };
 718         $self->log('info', "migrate_set_downtime error: $@") if $@;
 719     }
 720
 721     $self->log('info', "set migration_caps");
 722     eval {
 723         PVE::QemuServer::set_migration_caps($vmid);
 724     };
 725     warn $@ if $@;
 726
 727     # set cachesize to 10% of the total memory
 728     my $memory =  $conf->{memory} || $defaults->{memory};
 729     my $cachesize = int($memory * 1048576 / 10);
 730     $cachesize = round_powerof2($cachesize);
 731
 732     $self->log('info', "set cachesize: $cachesize");
 733     eval {
 734         mon_cmd($vmid, "migrate-set-cache-size", value => int($cachesize));
 735     };
 736     $self->log('info', "migrate-set-cache-size error: $@") if $@;
 737
 738     if (PVE::QemuServer::vga_conf_has_spice($conf->{vga})) {
 739         my $rpcenv = PVE::RPCEnvironment::get();
 740         my $authuser = $rpcenv->get_user();
 741
 742         my (undef, $proxyticket) = PVE::AccessControl::assemble_spice_ticket($authuser, $vmid, $self->{node});
 743
 744         my $filename = "/etc/pve/nodes/$self->{node}/pve-ssl.pem";
 745         my $subject =  PVE::AccessControl::read_x509_subject_spice($filename);
 746
 747         $self->log('info', "spice client_migrate_info");
 748
 749         eval {
 750             mon_cmd($vmid, "client_migrate_info", protocol => 'spice',
 751                                                 hostname => $proxyticket, 'port' => 0, 'tls-port' => $spice_port,
 752                                                 'cert-subject' => $subject);
 753         };
 754         $self->log('info', "client_migrate_info error: $@") if $@;
 755
 756     }
 757
 758     $self->log('info', "start migrate command to $ruri");
 759     eval {
 760         mon_cmd($vmid, "migrate", uri => $ruri);
 761     };
 762     my $merr = $@;
 763     $self->log('info', "migrate uri => $ruri failed: $merr") if $merr;
 764
 765     my $lstat = 0;
 766     my $usleep = 1000000;
 767     my $i = 0;
 768     my $err_count = 0;
 769     my $lastrem = undef;
 770     my $downtimecounter = 0;
 771     while (1) {
 772         $i++;
 773         my $avglstat = $lstat/$i if $lstat;
 774
 775         usleep($usleep);
 776         my $stat;
 777         eval {
 778             $stat = mon_cmd($vmid, "query-migrate");
 779         };
 780         if (my $err = $@) {
 781             $err_count++;
 782             warn "query migrate failed: $err\n";
 783             $self->log('info', "query migrate failed: $err");
 784             if ($err_count <= 5) {
 785                 usleep(1000000);
 786                 next;
 787             }
 788             die "too many query migrate failures - aborting\n";
 789         }
 790
 791         if (defined($stat->{status}) && $stat->{status} =~ m/^(setup)$/im) {
 792             sleep(1);
 793             next;
 794         }
 795
 796         if (defined($stat->{status}) && $stat->{status} =~ m/^(active|completed|failed|cancelled)$/im) {
 797             $merr = undef;
 798             $err_count = 0;
 799             if ($stat->{status} eq 'completed') {
 800                 my $delay = time() - $start;
 801                 if ($delay > 0) {
 802                     my $mbps = sprintf "%.2f", $memory / $delay;
 803                     my $downtime = $stat->{downtime} || 0;
 804                     $self->log('info', "migration speed: $mbps MB/s - downtime $downtime ms");
 805                 }
 806             }
 807
 808             if ($stat->{status} eq 'failed' || $stat->{status} eq 'cancelled') {
 809                 $self->log('info', "migration status error: $stat->{status}");
 810                 die "aborting\n"
 811             }
 812
 813             if ($stat->{status} ne 'active') {
 814                 $self->log('info', "migration status: $stat->{status}");
 815                 last;
 816             }
 817
 818             if ($stat->{ram}->{transferred} ne $lstat) {
 819                 my $trans = $stat->{ram}->{transferred} || 0;
 820                 my $rem = $stat->{ram}->{remaining} || 0;
 821                 my $total = $stat->{ram}->{total} || 0;
 822                 my $xbzrlecachesize = $stat->{"xbzrle-cache"}->{"cache-size"} || 0;
 823                 my $xbzrlebytes = $stat->{"xbzrle-cache"}->{"bytes"} || 0;
 824                 my $xbzrlepages = $stat->{"xbzrle-cache"}->{"pages"} || 0;
 825                 my $xbzrlecachemiss = $stat->{"xbzrle-cache"}->{"cache-miss"} || 0;
 826                 my $xbzrleoverflow = $stat->{"xbzrle-cache"}->{"overflow"} || 0;
 827                 # reduce sleep if remainig memory is lower than the average transfer speed
 828                 $usleep = 100000 if $avglstat && $rem < $avglstat;
 829
 830                 $self->log('info', "migration status: $stat->{status} (transferred ${trans}, " .
 831                            "remaining ${rem}), total ${total})");
 832
 833                 if (${xbzrlecachesize}) {
 834                     $self->log('info', "migration xbzrle cachesize: ${xbzrlecachesize} transferred ${xbzrlebytes} pages ${xbzrlepages} cachemiss ${xbzrlecachemiss} overflow ${xbzrleoverflow}");
 835                 }
 836
 837                 if (($lastrem  && $rem > $lastrem ) || ($rem == 0)) {
 838                     $downtimecounter++;
 839                 }
 840                 $lastrem = $rem;
 841
 842                 if ($downtimecounter > 5) {
 843                     $downtimecounter = 0;
 844                     $migrate_downtime *= 2;
 845                     $self->log('info', "migrate_set_downtime: $migrate_downtime");
 846                     eval {
 847                         mon_cmd($vmid, "migrate_set_downtime", value => int($migrate_downtime*100)/100);
 848                     };
 849                     $self->log('info', "migrate_set_downtime error: $@") if $@;
 850                 }
 851
 852             }
 853
 854
 855             $lstat = $stat->{ram}->{transferred};
 856
 857         } else {
 858             die $merr if $merr;
 859             die "unable to parse migration status '$stat->{status}' - aborting\n";
 860         }
 861     }
 862 }
 863
 864 sub phase2_cleanup {
 865     my ($self, $vmid, $err) = @_;
 866
 867     return if !$self->{errors};
 868     $self->{phase2errors} = 1;
 869
 870     $self->log('info', "aborting phase 2 - cleanup resources");
 871
 872     $self->log('info', "migrate_cancel");
 873     eval {
 874         mon_cmd($vmid, "migrate_cancel");
 875     };
 876     $self->log('info', "migrate_cancel error: $@") if $@;
 877
 878     my $conf = $self->{vmconf};
 879     delete $conf->{lock};
 880     eval { PVE::QemuConfig->write_config($vmid, $conf) };
 881     if (my $err = $@) {
 882         $self->log('err', $err);
 883     }
 884
 885     # cleanup ressources on target host
 886     if ($self->{storage_migration}) {
 887
 888         eval { PVE::QemuServer::qemu_blockjobs_cancel($vmid, $self->{storage_migration_jobs}) };
 889         if (my $err = $@) {
 890             $self->log('err', $err);
 891         }
 892
 893         eval { PVE::QemuMigrate::cleanup_remotedisks($self) };
 894         if (my $err = $@) {
 895             $self->log('err', $err);
 896         }
 897     }
 898
 899     my $nodename = PVE::INotify::nodename();
 900
 901     my $cmd = [@{$self->{rem_ssh}}, 'qm', 'stop', $vmid, '--skiplock', '--migratedfrom', $nodename];
 902     eval{ PVE::Tools::run_command($cmd, outfunc => sub {}, errfunc => sub {}) };
 903     if (my $err = $@) {
 904         $self->log('err', $err);
 905         $self->{errors} = 1;
 906     }
 907
 908     if ($self->{tunnel}) {
 909         eval { finish_tunnel($self, $self->{tunnel});  };
 910         if (my $err = $@) {
 911             $self->log('err', $err);
 912             $self->{errors} = 1;
 913         }
 914     }
 915 }
 916
 917 sub phase3 {
 918     my ($self, $vmid) = @_;
 919
 920     my $volids = $self->{volumes};
 921     return if $self->{phase2errors};
 922
 923     # destroy local copies
 924     foreach my $volid (@$volids) {
 925         eval { PVE::Storage::vdisk_free($self->{storecfg}, $volid); };
 926         if (my $err = $@) {
 927             $self->log('err', "removing local copy of '$volid' failed - $err");
 928             $self->{errors} = 1;
 929             last if $err =~ /^interrupted by signal$/;
 930         }
 931     }
 932 }
 933
 934 sub phase3_cleanup {
 935     my ($self, $vmid, $err) = @_;
 936
 937     my $conf = $self->{vmconf};
 938     return if $self->{phase2errors};
 939
 940     my $tunnel = $self->{tunnel};
 941
 942     if ($self->{storage_migration}) {
 943         # finish block-job
 944         eval { PVE::QemuServer::qemu_drive_mirror_monitor($vmid, undef, $self->{storage_migration_jobs}); };
 945
 946         if (my $err = $@) {
 947             eval { PVE::QemuServer::qemu_blockjobs_cancel($vmid, $self->{storage_migration_jobs}) };
 948             eval { PVE::QemuMigrate::cleanup_remotedisks($self) };
 949             die "Failed to complete storage migration: $err\n";
 950         } else {
 951             foreach my $target_drive (keys %{$self->{target_drive}}) {
 952                 my $drive = PVE::QemuServer::parse_drive($target_drive, $self->{target_drive}->{$target_drive}->{volid});
 953                 $conf->{$target_drive} = PVE::QemuServer::print_drive($drive);
 954                 PVE::QemuConfig->write_config($vmid, $conf);
 955             }
 956         }
 957     }
 958
 959     # transfer replication state before move config
 960     $self->transfer_replication_state() if $self->{replicated_volumes};
 961
 962     # move config to remote node
 963     my $conffile = PVE::QemuConfig->config_file($vmid);
 964     my $newconffile = PVE::QemuConfig->config_file($vmid, $self->{node});
 965
 966     die "Failed to move config to node '$self->{node}' - rename failed: $!\n"
 967         if !rename($conffile, $newconffile);
 968
 969     $self->switch_replication_job_target() if $self->{replicated_volumes};
 970
 971     if ($self->{livemigration}) {
 972         if ($self->{storage_migration}) {
 973             # stop nbd server on remote vm - requirement for resume since 2.9
 974             my $cmd = [@{$self->{rem_ssh}}, 'qm', 'nbdstop', $vmid];
 975
 976             eval{ PVE::Tools::run_command($cmd, outfunc => sub {}, errfunc => sub {}) };
 977             if (my $err = $@) {
 978                 $self->log('err', $err);
 979                 $self->{errors} = 1;
 980             }
 981         }
 982
 983         # config moved and nbd server stopped - now we can resume vm on target
 984         if ($tunnel && $tunnel->{version} && $tunnel->{version} >= 1) {
 985             eval {
 986                 $self->write_tunnel($tunnel, 30, "resume $vmid");
 987             };
 988             if (my $err = $@) {
 989                 $self->log('err', $err);
 990                 $self->{errors} = 1;
 991             }
 992         } else {
 993             my $cmd = [@{$self->{rem_ssh}}, 'qm', 'resume', $vmid, '--skiplock', '--nocheck'];
 994             my $logf = sub {
 995                 my $line = shift;
 996                 $self->log('err', $line);
 997             };
 998             eval { PVE::Tools::run_command($cmd, outfunc => sub {}, errfunc => $logf); };
 999             if (my $err = $@) {
1000                 $self->log('err', $err);
1001                 $self->{errors} = 1;
1002             }
1003         }
1004
1005         if ($self->{storage_migration} && PVE::QemuServer::parse_guest_agent($conf)->{fstrim_cloned_disks} && $self->{running}) {
1006             my $cmd = [@{$self->{rem_ssh}}, 'qm', 'guest', 'cmd', $vmid, 'fstrim'];
1007             eval{ PVE::Tools::run_command($cmd, outfunc => sub {}, errfunc => sub {}) };
1008         }
1009     }
1010
1011     # close tunnel on successful migration, on error phase2_cleanup closed it
1012     if ($tunnel) {
1013         eval { finish_tunnel($self, $tunnel);  };
1014         if (my $err = $@) {
1015             $self->log('err', $err);
1016             $self->{errors} = 1;
1017         }
1018     }
1019
1020     eval {
1021         my $timer = 0;
1022         if (PVE::QemuServer::vga_conf_has_spice($conf->{vga}) && $self->{running}) {
1023             $self->log('info', "Waiting for spice server migration");
1024             while (1) {
1025                 my $res = mon_cmd($vmid, 'query-spice');
1026                 last if int($res->{'migrated'}) == 1;
1027                 last if $timer > 50;
1028                 $timer ++;
1029                 usleep(200000);
1030             }
1031         }
1032     };
1033
1034     # always stop local VM
1035     eval { PVE::QemuServer::vm_stop($self->{storecfg}, $vmid, 1, 1); };
1036     if (my $err = $@) {
1037         $self->log('err', "stopping vm failed - $err");
1038         $self->{errors} = 1;
1039     }
1040
1041     # always deactivate volumes - avoid lvm LVs to be active on several nodes
1042     eval {
1043         my $vollist = PVE::QemuServer::get_vm_volumes($conf);
1044         PVE::Storage::deactivate_volumes($self->{storecfg}, $vollist);
1045     };
1046     if (my $err = $@) {
1047         $self->log('err', $err);
1048         $self->{errors} = 1;
1049     }
1050
1051     if($self->{storage_migration}) {
1052         # destroy local copies
1053         my $volids = $self->{online_local_volumes};
1054
1055         foreach my $volid (@$volids) {
1056             eval { PVE::Storage::vdisk_free($self->{storecfg}, $volid); };
1057             if (my $err = $@) {
1058                 $self->log('err', "removing local copy of '$volid' failed - $err");
1059                 $self->{errors} = 1;
1060                 last if $err =~ /^interrupted by signal$/;
1061             }
1062         }
1063
1064     }
1065
1066     # clear migrate lock
1067     my $cmd = [ @{$self->{rem_ssh}}, 'qm', 'unlock', $vmid ];
1068     $self->cmd_logerr($cmd, errmsg => "failed to clear migrate lock");
1069 }
1070
1071 sub final_cleanup {
1072     my ($self, $vmid) = @_;
1073
1074     # nothing to do
1075 }
1076
1077 sub round_powerof2 {
1078     return 1 if $_[0] < 2;
1079     return 2 << int(log($_[0]-1)/log(2));
1080 }
1081
1082 1;