1 package PVE
::QemuMigrate
;
8 use POSIX
qw( WNOHANG );
9 use Time
::HiRes
qw( usleep );
12 use PVE
::GuestHelpers
qw(safe_string_ne);
14 use PVE
::RPCEnvironment
;
16 use PVE
::ReplicationConfig
;
17 use PVE
::ReplicationState
;
22 use PVE
::QemuServer
::CPUConfig
;
23 use PVE
::QemuServer
::Drive
;
24 use PVE
::QemuServer
::Helpers
qw(min_version);
25 use PVE
::QemuServer
::Machine
;
26 use PVE
::QemuServer
::Monitor
qw(mon_cmd);
29 use PVE
::AbstractMigrate
;
30 use base
qw(PVE::AbstractMigrate);
32 sub fork_command_pipe
{
33 my ($self, $cmd) = @_;
35 my $reader = IO
::File-
>new();
36 my $writer = IO
::File-
>new();
42 eval { $cpid = open2
($reader, $writer, @$cmd); };
47 if ($orig_pid != $$) {
48 $self->log('err', "can't fork command pipe\n");
55 return { writer
=> $writer, reader
=> $reader, pid
=> $cpid };
58 sub finish_command_pipe
{
59 my ($self, $cmdpipe, $timeout) = @_;
61 my $cpid = $cmdpipe->{pid
};
62 return if !defined($cpid);
64 my $writer = $cmdpipe->{writer
};
65 my $reader = $cmdpipe->{reader
};
70 my $collect_child_process = sub {
71 my $res = waitpid($cpid, WNOHANG
);
72 if (defined($res) && ($res == $cpid)) {
73 delete $cmdpipe->{cpid
};
81 for (my $i = 0; $i < $timeout; $i++) {
82 return if &$collect_child_process();
87 $self->log('info', "ssh tunnel still running - terminating now with SIGTERM\n");
91 for (my $i = 0; $i < 10; $i++) {
92 return if &$collect_child_process();
96 $self->log('info', "ssh tunnel still running - terminating now with SIGKILL\n");
100 $self->log('err', "ssh tunnel child process (PID $cpid) couldn't be collected\n")
101 if !&$collect_child_process();
105 my ($self, $tunnel, $timeout) = @_;
107 $timeout = 60 if !defined($timeout);
109 my $reader = $tunnel->{reader
};
113 PVE
::Tools
::run_with_timeout
($timeout, sub { $output = <$reader>; });
115 die "reading from tunnel failed: $@\n" if $@;
123 my ($self, $tunnel, $timeout, $command) = @_;
125 $timeout = 60 if !defined($timeout);
127 my $writer = $tunnel->{writer
};
130 PVE
::Tools
::run_with_timeout
($timeout, sub {
131 print $writer "$command\n";
135 die "writing to tunnel failed: $@\n" if $@;
137 if ($tunnel->{version
} && $tunnel->{version
} >= 1) {
138 my $res = eval { $self->read_tunnel($tunnel, 10); };
139 die "no reply to command '$command': $@\n" if $@;
144 die "tunnel replied '$res' to command '$command'\n";
150 my ($self, $ssh_forward_info) = @_;
152 my @localtunnelinfo = ();
153 foreach my $addr (@$ssh_forward_info) {
154 push @localtunnelinfo, '-L', $addr;
157 my $cmd = [@{$self->{rem_ssh
}}, '-o ExitOnForwardFailure=yes', @localtunnelinfo, '/usr/sbin/qm', 'mtunnel' ];
159 my $tunnel = $self->fork_command_pipe($cmd);
162 my $helo = $self->read_tunnel($tunnel, 60);
163 die "no reply\n" if !$helo;
164 die "no quorum on target node\n" if $helo =~ m/^no quorum$/;
165 die "got strange reply from mtunnel ('$helo')\n"
166 if $helo !~ m/^tunnel online$/;
171 my $ver = $self->read_tunnel($tunnel, 10);
172 if ($ver =~ /^ver (\d+)$/) {
173 $tunnel->{version
} = $1;
174 $self->log('info', "ssh tunnel $ver\n");
176 $err = "received invalid tunnel version string '$ver'\n" if !$err;
181 $self->finish_command_pipe($tunnel);
182 die "can't open migration tunnel - $err";
188 my ($self, $tunnel) = @_;
190 eval { $self->write_tunnel($tunnel, 30, 'quit'); };
193 $self->finish_command_pipe($tunnel, 30);
195 if (my $unix_sockets = $tunnel->{unix_sockets
}) {
196 # ssh does not clean up on local host
197 my $cmd = ['rm', '-f', @$unix_sockets];
198 PVE
::Tools
::run_command
($cmd);
200 # .. and just to be sure check on remote side
201 unshift @{$cmd}, @{$self->{rem_ssh
}};
202 PVE
::Tools
::run_command
($cmd);
208 sub start_remote_tunnel
{
209 my ($self, $raddr, $rport, $ruri, $unix_socket_info) = @_;
211 my $nodename = PVE
::INotify
::nodename
();
212 my $migration_type = $self->{opts
}->{migration_type
};
214 if ($migration_type eq 'secure') {
216 if ($ruri =~ /^unix:/) {
217 my $ssh_forward_info = ["$raddr:$raddr"];
218 $unix_socket_info->{$raddr} = 1;
220 my $unix_sockets = [ keys %$unix_socket_info ];
221 for my $sock (@$unix_sockets) {
222 push @$ssh_forward_info, "$sock:$sock";
226 $self->{tunnel
} = $self->fork_tunnel($ssh_forward_info);
228 my $unix_socket_try = 0; # wait for the socket to become ready
229 while ($unix_socket_try <= 100) {
232 foreach my $sock (@$unix_sockets) {
238 if ($available == @$unix_sockets) {
244 if ($unix_socket_try > 100) {
246 $self->finish_tunnel($self->{tunnel
});
247 die "Timeout, migration socket $ruri did not get ready";
249 $self->{tunnel
}->{unix_sockets
} = $unix_sockets if (@$unix_sockets);
251 } elsif ($ruri =~ /^tcp:/) {
252 my $ssh_forward_info = [];
253 if ($raddr eq "localhost") {
254 # for backwards compatibility with older qemu-server versions
255 my $pfamily = PVE
::Tools
::get_host_address_family
($nodename);
256 my $lport = PVE
::Tools
::next_migrate_port
($pfamily);
257 push @$ssh_forward_info, "$lport:localhost:$rport";
260 $self->{tunnel
} = $self->fork_tunnel($ssh_forward_info);
263 die "unsupported protocol in migration URI: $ruri\n";
266 #fork tunnel for insecure migration, to send faster commands like resume
267 $self->{tunnel
} = $self->fork_tunnel();
272 my ($self, $vmid, $code, @param) = @_;
274 return PVE
::QemuConfig-
>lock_config($vmid, $code, @param);
278 my ($self, $vmid) = @_;
280 my $online = $self->{opts
}->{online
};
282 $self->{storecfg
} = PVE
::Storage
::config
();
285 my $conf = $self->{vmconf
} = PVE
::QemuConfig-
>load_config($vmid);
287 my $repl_conf = PVE
::ReplicationConfig-
>new();
288 $self->{replication_jobcfg
} = $repl_conf->find_local_replication_job($vmid, $self->{node
});
289 $self->{is_replicated
} = $repl_conf->check_for_existing_jobs($vmid, 1);
291 if ($self->{replication_jobcfg
} && defined($self->{replication_jobcfg
}->{remove_job
})) {
292 die "refusing to migrate replicated VM whose replication job is marked for removal\n";
295 PVE
::QemuConfig-
>check_lock($conf);
298 if (my $pid = PVE
::QemuServer
::check_running
($vmid)) {
299 die "can't migrate running VM without --online\n" if !$online;
302 if ($self->{is_replicated
} && !$self->{replication_jobcfg
}) {
303 if ($self->{opts
}->{force
}) {
304 $self->log('warn', "WARNING: Node '$self->{node}' is not a replication target. Existing " .
305 "replication jobs will fail after migration!\n");
307 die "Cannot live-migrate replicated VM to node '$self->{node}' - not a replication " .
308 "target. Use 'force' to override.\n";
312 $self->{forcemachine
} = PVE
::QemuServer
::Machine
::qemu_machine_pxe
($vmid, $conf);
314 # To support custom CPU types, we keep QEMU's "-cpu" parameter intact.
315 # Since the parameter itself contains no reference to a custom model,
316 # this makes migration independent of changes to "cpu-models.conf".
318 my $cpuconf = PVE
::JSONSchema
::parse_property_string
('pve-cpu-conf', $conf->{cpu
});
319 if ($cpuconf && PVE
::QemuServer
::CPUConfig
::is_custom_model
($cpuconf->{cputype
})) {
320 $self->{forcecpu
} = PVE
::QemuServer
::CPUConfig
::get_cpu_from_running_vm
($pid);
325 my $loc_res = PVE
::QemuServer
::check_local_resources
($conf, 1);
326 if (scalar @$loc_res) {
327 if ($self->{running
} || !$self->{opts
}->{force
}) {
328 die "can't migrate VM which uses local devices: " . join(", ", @$loc_res) . "\n";
330 $self->log('info', "migrating VM which uses local devices");
334 my $vollist = PVE
::QemuServer
::get_vm_volumes
($conf);
336 foreach my $volid (@$vollist) {
337 my ($sid, $volname) = PVE
::Storage
::parse_volume_id
($volid, 1);
339 # check if storage is available on both nodes
340 my $targetsid = PVE
::QemuServer
::map_storage
($self->{opts
}->{storagemap
}, $sid);
342 my $scfg = PVE
::Storage
::storage_check_node
($self->{storecfg
}, $sid);
343 PVE
::Storage
::storage_check_node
($self->{storecfg
}, $targetsid, $self->{node
});
345 if ($scfg->{shared
}) {
346 # PVE::Storage::activate_storage checks this for non-shared storages
347 my $plugin = PVE
::Storage
::Plugin-
>lookup($scfg->{type
});
348 warn "Used shared storage '$sid' is not online on source node!\n"
349 if !$plugin->check_connection($sid, $scfg);
353 # test ssh connection
354 my $cmd = [ @{$self->{rem_ssh
}}, '/bin/true' ];
355 eval { $self->cmd_quiet($cmd); };
356 die "Can't connect to destination address using public key\n" if $@;
361 sub scan_local_volumes
{
362 my ($self, $vmid) = @_;
364 my $conf = $self->{vmconf
};
366 # local volumes which have been copied
367 # and their old_id => new_id pairs
368 $self->{volume_map
} = {};
369 $self->{local_volumes
} = {};
371 my $storecfg = $self->{storecfg
};
374 # found local volumes and their origin
375 my $local_volumes = $self->{local_volumes
};
376 my $local_volumes_errors = {};
377 my $other_errors = [];
380 my $log_error = sub {
381 my ($msg, $volid) = @_;
383 if (defined($volid)) {
384 $local_volumes_errors->{$volid} = $msg;
386 push @$other_errors, $msg;
391 my @sids = PVE
::Storage
::storage_ids
($storecfg);
392 foreach my $storeid (@sids) {
393 my $scfg = PVE
::Storage
::storage_config
($storecfg, $storeid);
394 next if $scfg->{shared
};
395 next if !PVE
::Storage
::storage_check_enabled
($storecfg, $storeid, undef, 1);
397 # get list from PVE::Storage (for unused volumes)
398 my $dl = PVE
::Storage
::vdisk_list
($storecfg, $storeid, $vmid);
400 next if @{$dl->{$storeid}} == 0;
402 my $targetsid = PVE
::QemuServer
::map_storage
($self->{opts
}->{storagemap
}, $storeid);
403 # check if storage is available on target node
404 PVE
::Storage
::storage_check_node
($storecfg, $targetsid, $self->{node
});
406 # grandfather in existing mismatches
407 if ($targetsid ne $storeid) {
408 my $target_scfg = PVE
::Storage
::storage_config
($storecfg, $targetsid);
409 die "content type 'images' is not available on storage '$targetsid'\n"
410 if !$target_scfg->{content
}->{images
};
413 my $bwlimit = PVE
::Storage
::get_bandwidth_limit
(
415 [$targetsid, $storeid],
416 $self->{opts
}->{bwlimit
},
419 PVE
::Storage
::foreach_volid
($dl, sub {
420 my ($volid, $sid, $volinfo) = @_;
422 $local_volumes->{$volid}->{ref} = 'storage';
423 $local_volumes->{$volid}->{size
} = $volinfo->{size
};
424 $local_volumes->{$volid}->{targetsid
} = $targetsid;
425 $local_volumes->{$volid}->{bwlimit
} = $bwlimit;
427 # If with_snapshots is not set for storage migrate, it tries to use
428 # a raw+size stream, but on-the-fly conversion from qcow2 to raw+size
429 # back to qcow2 is currently not possible.
430 $local_volumes->{$volid}->{snapshots
} = ($volinfo->{format
} =~ /^(?:qcow2|vmdk)$/);
431 $local_volumes->{$volid}->{format
} = $volinfo->{format
};
435 my $replicatable_volumes = !$self->{replication_jobcfg
} ?
{}
436 : PVE
::QemuConfig-
>get_replicatable_volumes($storecfg, $vmid, $conf, 0, 1);
438 my $test_volid = sub {
439 my ($volid, $attr) = @_;
441 if ($volid =~ m
|^/|) {
442 return if $attr->{shared
};
443 $local_volumes->{$volid}->{ref} = 'config';
444 die "local file/device\n";
447 my $snaprefs = $attr->{referenced_in_snapshot
};
449 if ($attr->{cdrom
}) {
450 if ($volid eq 'cdrom') {
451 my $msg = "can't migrate local cdrom drive";
452 if (defined($snaprefs) && !$attr->{referenced_in_config
}) {
453 my $snapnames = join(', ', sort keys %$snaprefs);
454 $msg .= " (referenced in snapshot - $snapnames)";
456 &$log_error("$msg\n");
459 return if $volid eq 'none';
462 my ($sid, $volname) = PVE
::Storage
::parse_volume_id
($volid);
464 my $targetsid = PVE
::QemuServer
::map_storage
($self->{opts
}->{storagemap
}, $sid);
465 # check if storage is available on both nodes
466 my $scfg = PVE
::Storage
::storage_check_node
($storecfg, $sid);
467 PVE
::Storage
::storage_check_node
($storecfg, $targetsid, $self->{node
});
469 return if $scfg->{shared
};
471 $local_volumes->{$volid}->{ref} = $attr->{referenced_in_config
} ?
'config' : 'snapshot';
472 $local_volumes->{$volid}->{ref} = 'storage' if $attr->{is_unused
};
474 $local_volumes->{$volid}->{is_vmstate
} = $attr->{is_vmstate
} ?
1 : 0;
476 if ($attr->{cdrom
}) {
477 if ($volid =~ /vm-\d+-cloudinit/) {
478 $local_volumes->{$volid}->{ref} = 'generated';
481 die "local cdrom image\n";
484 my ($path, $owner) = PVE
::Storage
::path
($storecfg, $volid);
486 die "owned by other VM (owner = VM $owner)\n"
487 if !$owner || ($owner != $vmid);
489 return if $attr->{is_vmstate
};
491 if (defined($snaprefs)) {
492 $local_volumes->{$volid}->{snapshots
} = 1;
494 # we cannot migrate shapshots on local storage
495 # exceptions: 'zfspool' or 'qcow2' files (on directory storage)
497 die "online storage migration not possible if snapshot exists\n" if $self->{running
};
498 if (!($scfg->{type
} eq 'zfspool' || $local_volumes->{$volid}->{format
} eq 'qcow2')) {
499 die "non-migratable snapshot exists\n";
503 die "referenced by linked clone(s)\n"
504 if PVE
::Storage
::volume_is_base_and_used
($storecfg, $volid);
507 PVE
::QemuServer
::foreach_volid
($conf, sub {
508 my ($volid, $attr) = @_;
509 eval { $test_volid->($volid, $attr); };
511 &$log_error($err, $volid);
515 foreach my $vol (sort keys %$local_volumes) {
516 my $type = $replicatable_volumes->{$vol} ?
'local, replicated' : 'local';
517 my $ref = $local_volumes->{$vol}->{ref};
518 if ($ref eq 'storage') {
519 $self->log('info', "found $type disk '$vol' (via storage)\n");
520 } elsif ($ref eq 'config') {
521 &$log_error("can't live migrate attached local disks without with-local-disks option\n", $vol)
522 if $self->{running
} && !$self->{opts
}->{"with-local-disks"};
523 $self->log('info', "found $type disk '$vol' (in current VM config)\n");
524 } elsif ($ref eq 'snapshot') {
525 $self->log('info', "found $type disk '$vol' (referenced by snapshot(s))\n");
526 } elsif ($ref eq 'generated') {
527 $self->log('info', "found generated disk '$vol' (in current VM config)\n");
529 $self->log('info', "found $type disk '$vol'\n");
533 foreach my $vol (sort keys %$local_volumes_errors) {
534 $self->log('warn', "can't migrate local disk '$vol': $local_volumes_errors->{$vol}");
536 foreach my $err (@$other_errors) {
537 $self->log('warn', "$err");
541 die "can't migrate VM - check log\n";
544 # additional checks for local storage
545 foreach my $volid (keys %$local_volumes) {
546 my ($sid, $volname) = PVE
::Storage
::parse_volume_id
($volid);
547 my $scfg = PVE
::Storage
::storage_config
($storecfg, $sid);
549 my $migratable = $scfg->{type
} =~ /^(?:dir|zfspool|lvmthin|lvm)$/;
551 die "can't migrate '$volid' - storage type '$scfg->{type}' not supported\n"
554 # image is a linked clone on local storage, se we can't migrate.
555 if (my $basename = (PVE
::Storage
::parse_volname
($storecfg, $volid))[3]) {
556 die "can't migrate '$volid' as it's a clone of '$basename'";
560 if ($self->{replication_jobcfg
}) {
561 if ($self->{running
}) {
563 my $version = PVE
::QemuServer
::kvm_user_version
();
564 if (!min_version
($version, 4, 2)) {
565 die "can't live migrate VM with replicated volumes, pve-qemu to old (< 4.2)!\n"
568 my $live_replicatable_volumes = {};
569 PVE
::QemuConfig-
>foreach_volume($conf, sub {
570 my ($ds, $drive) = @_;
572 my $volid = $drive->{file
};
573 $live_replicatable_volumes->{$ds} = $volid
574 if defined($replicatable_volumes->{$volid});
576 foreach my $drive (keys %$live_replicatable_volumes) {
577 my $volid = $live_replicatable_volumes->{$drive};
579 my $bitmap = "repl_$drive";
581 # start tracking before replication to get full delta + a few duplicates
582 $self->log('info', "$drive: start tracking writes using block-dirty-bitmap '$bitmap'");
583 mon_cmd
($vmid, 'block-dirty-bitmap-add', node
=> "drive-$drive", name
=> $bitmap);
585 # other info comes from target node in phase 2
586 $self->{target_drive
}->{$drive}->{bitmap
} = $bitmap;
589 $self->log('info', "replicating disk images");
591 my $start_time = time();
592 my $logfunc = sub { $self->log('info', shift) };
593 $self->{replicated_volumes
} = PVE
::Replication
::run_replication
(
594 'PVE::QemuConfig', $self->{replication_jobcfg
}, $start_time, $start_time, $logfunc);
597 foreach my $volid (sort keys %$local_volumes) {
598 my $ref = $local_volumes->{$volid}->{ref};
599 if ($self->{running
} && $ref eq 'config') {
600 push @{$self->{online_local_volumes
}}, $volid;
601 } elsif ($self->{running
} && $ref eq 'generated') {
602 die "can't live migrate VM with local cloudinit disk. use a shared storage instead\n";
604 next if $self->{replicated_volumes
}->{$volid};
605 $local_volumes->{$volid}->{migration_mode
} = 'offline';
609 die "Problem found while scanning volumes - $@" if $@;
612 sub config_update_local_disksizes
{
615 my $conf = $self->{vmconf
};
616 my $local_volumes = $self->{local_volumes
};
618 PVE
::QemuConfig-
>foreach_volume($conf, sub {
619 my ($key, $drive) = @_;
620 return if $key eq 'efidisk0'; # skip efidisk, will be handled later
622 my $volid = $drive->{file
};
623 return if !defined($local_volumes->{$volid}); # only update sizes for local volumes
625 my ($updated, $msg) = PVE
::QemuServer
::Drive
::update_disksize
($drive, $local_volumes->{$volid}->{size
});
626 if (defined($updated)) {
627 $conf->{$key} = PVE
::QemuServer
::print_drive
($updated);
628 $self->log('info', "drive '$key': $msg");
632 # we want to set the efidisk size in the config to the size of the
633 # real OVMF_VARS.fd image, else we can create a too big image, which does not work
634 if (defined($conf->{efidisk0
})) {
635 PVE
::QemuServer
::update_efidisk_size
($conf);
639 sub filter_local_volumes
{
640 my ($self, $migration_mode) = @_;
642 my $volumes = $self->{local_volumes
};
645 foreach my $volid (sort keys %{$volumes}) {
646 next if defined($migration_mode) && safe_string_ne
($volumes->{$volid}->{migration_mode
}, $migration_mode);
647 push @filtered_volids, $volid;
650 return @filtered_volids;
653 sub sync_offline_local_volumes
{
656 my $local_volumes = $self->{local_volumes
};
657 my @volids = $self->filter_local_volumes('offline');
659 my $storecfg = $self->{storecfg
};
660 my $opts = $self->{opts
};
662 $self->log('info', "copying local disk images") if scalar(@volids);
664 foreach my $volid (@volids) {
665 my $targetsid = $local_volumes->{$volid}->{targetsid
};
666 my $bwlimit = $local_volumes->{$volid}->{bwlimit
};
667 $bwlimit = $bwlimit * 1024 if defined($bwlimit); # storage_migrate uses bps
669 my $storage_migrate_opts = {
670 'ratelimit_bps' => $bwlimit,
671 'insecure' => $opts->{migration_type
} eq 'insecure',
672 'with_snapshots' => $local_volumes->{$volid}->{snapshots
},
673 'allow_rename' => !$local_volumes->{$volid}->{is_vmstate
},
676 my $logfunc = sub { $self->log('info', $_[0]); };
677 my $new_volid = eval {
678 PVE
::Storage
::storage_migrate
($storecfg, $volid, $self->{ssh_info
},
679 $targetsid, $storage_migrate_opts, $logfunc);
682 die "storage migration for '$volid' to storage '$targetsid' failed - $err\n";
685 $self->{volume_map
}->{$volid} = $new_volid;
686 $self->log('info', "volume '$volid' is '$new_volid' on the target\n");
688 eval { PVE
::Storage
::deactivate_volumes
($storecfg, [$volid]); };
690 $self->log('warn', $err);
695 sub cleanup_remotedisks
{
698 foreach my $volid (values %{$self->{volume_map
}}) {
699 # don't clean up replicated disks!
700 next if defined($self->{replicated_volumes
}->{$volid});
702 my ($storeid, $volname) = PVE
::Storage
::parse_volume_id
($volid);
704 my $cmd = [@{$self->{rem_ssh
}}, 'pvesm', 'free', "$storeid:$volname"];
706 eval{ PVE
::Tools
::run_command
($cmd, outfunc
=> sub {}, errfunc
=> sub {}) };
708 $self->log('err', $err);
714 sub cleanup_bitmaps
{
716 foreach my $drive (keys %{$self->{target_drive
}}) {
717 my $bitmap = $self->{target_drive
}->{$drive}->{bitmap
};
719 $self->log('info', "$drive: removing block-dirty-bitmap '$bitmap'");
720 mon_cmd
($self->{vmid
}, 'block-dirty-bitmap-remove', node
=> "drive-$drive", name
=> $bitmap);
725 my ($self, $vmid) = @_;
727 $self->log('info', "starting migration of VM $vmid to node '$self->{node}' ($self->{nodeip})");
729 my $conf = $self->{vmconf
};
731 # set migrate lock in config file
732 $conf->{lock} = 'migrate';
733 PVE
::QemuConfig-
>write_config($vmid, $conf);
735 $self->scan_local_volumes($vmid);
737 # fix disk sizes to match their actual size and write changes,
738 # so that the target allocates the correct volumes
739 $self->config_update_local_disksizes();
740 PVE
::QemuConfig-
>write_config($vmid, $conf);
742 $self->sync_offline_local_volumes();
746 my ($self, $vmid, $err) = @_;
748 $self->log('info', "aborting phase 1 - cleanup resources");
750 my $conf = $self->{vmconf
};
751 delete $conf->{lock};
752 eval { PVE
::QemuConfig-
>write_config($vmid, $conf) };
754 $self->log('err', $err);
757 eval { $self->cleanup_remotedisks() };
759 $self->log('err', $err);
762 eval { $self->cleanup_bitmaps() };
764 $self->log('err', $err);
769 my ($self, $vmid) = @_;
771 my $conf = $self->{vmconf
};
772 my $local_volumes = $self->{local_volumes
};
774 $self->log('info', "starting VM $vmid on remote node '$self->{node}'");
778 my $ruri; # the whole migration dst. URI (protocol:address[:port])
779 my $nodename = PVE
::INotify
::nodename
();
781 ## start on remote node
782 my $cmd = [@{$self->{rem_ssh
}}];
785 if (PVE
::QemuServer
::vga_conf_has_spice
($conf->{vga
})) {
786 my $res = mon_cmd
($vmid, 'query-spice');
787 $spice_ticket = $res->{ticket
};
790 push @$cmd , 'qm', 'start', $vmid, '--skiplock', '--migratedfrom', $nodename;
792 my $migration_type = $self->{opts
}->{migration_type
};
794 push @$cmd, '--migration_type', $migration_type;
796 push @$cmd, '--migration_network', $self->{opts
}->{migration_network
}
797 if $self->{opts
}->{migration_network
};
799 if ($migration_type eq 'insecure') {
800 push @$cmd, '--stateuri', 'tcp';
802 push @$cmd, '--stateuri', 'unix';
805 if ($self->{forcemachine
}) {
806 push @$cmd, '--machine', $self->{forcemachine
};
809 if ($self->{forcecpu
}) {
810 push @$cmd, '--force-cpu', $self->{forcecpu
};
813 if ($self->{online_local_volumes
}) {
814 push @$cmd, '--targetstorage', ($self->{opts
}->{targetstorage
} // '1');
818 my $unix_socket_info = {};
819 # version > 0 for unix socket support
820 my $nbd_protocol_version = 1;
821 # TODO change to 'spice_ticket: <ticket>\n' in 7.0
822 my $input = $spice_ticket ?
"$spice_ticket\n" : "\n";
823 $input .= "nbd_protocol_version: $nbd_protocol_version\n";
825 my $number_of_online_replicated_volumes = 0;
827 # prevent auto-vivification
828 if ($self->{online_local_volumes
}) {
829 foreach my $volid (@{$self->{online_local_volumes
}}) {
830 next if !$self->{replicated_volumes
}->{$volid};
831 $number_of_online_replicated_volumes++;
832 $input .= "replicated_volume: $volid\n";
836 my $handle_storage_migration_listens = sub {
837 my ($drive_key, $drivestr, $nbd_uri) = @_;
839 $self->{stopnbd
} = 1;
840 $self->{target_drive
}->{$drive_key}->{drivestr
} = $drivestr;
841 $self->{target_drive
}->{$drive_key}->{nbd_uri
} = $nbd_uri;
843 my $source_drive = PVE
::QemuServer
::parse_drive
($drive_key, $conf->{$drive_key});
844 my $target_drive = PVE
::QemuServer
::parse_drive
($drive_key, $drivestr);
845 my $source_volid = $source_drive->{file
};
846 my $target_volid = $target_drive->{file
};
848 $self->{volume_map
}->{$source_volid} = $target_volid;
849 $self->log('info', "volume '$source_volid' is '$target_volid' on the target\n");
852 my $target_replicated_volumes = {};
854 # Note: We try to keep $spice_ticket secret (do not pass via command line parameter)
855 # instead we pipe it through STDIN
856 my $exitcode = PVE
::Tools
::run_command
($cmd, input
=> $input, outfunc
=> sub {
859 if ($line =~ m/^migration listens on tcp:(localhost|[\d\.]+|\[[\d\.:a-fA-F]+\]):(\d+)$/) {
862 $ruri = "tcp:$raddr:$rport";
864 elsif ($line =~ m!^migration listens on unix:(/run/qemu-server/(\d+)\.migrate)$!) {
866 die "Destination UNIX sockets VMID does not match source VMID" if $vmid ne $2;
867 $ruri = "unix:$raddr";
869 elsif ($line =~ m/^migration listens on port (\d+)$/) {
870 $raddr = "localhost";
872 $ruri = "tcp:$raddr:$rport";
874 elsif ($line =~ m/^spice listens on port (\d+)$/) {
875 $spice_port = int($1);
877 elsif ($line =~ m/^storage migration listens on nbd:(localhost|[\d\.]+|\[[\d\.:a-fA-F]+\]):(\d+):exportname=(\S+) volume:(\S+)$/) {
879 my $nbd_uri = "nbd:$1:$2:exportname=$3";
880 my $targetdrive = $3;
881 $targetdrive =~ s/drive-//g;
883 $handle_storage_migration_listens->($targetdrive, $drivestr, $nbd_uri);
884 } elsif ($line =~ m!^storage migration listens on nbd:unix:(/run/qemu-server/(\d+)_nbd\.migrate):exportname=(\S+) volume:(\S+)$!) {
886 die "Destination UNIX socket's VMID does not match source VMID" if $vmid ne $2;
887 my $nbd_unix_addr = $1;
888 my $nbd_uri = "nbd:unix:$nbd_unix_addr:exportname=$3";
889 my $targetdrive = $3;
890 $targetdrive =~ s/drive-//g;
892 $handle_storage_migration_listens->($targetdrive, $drivestr, $nbd_uri);
893 $unix_socket_info->{$nbd_unix_addr} = 1;
894 } elsif ($line =~ m/^re-using replicated volume: (\S+) - (.*)$/) {
897 $target_replicated_volumes->{$volid} = $drive;
898 } elsif ($line =~ m/^QEMU: (.*)$/) {
899 $self->log('info', "[$self->{node}] $1\n");
903 $self->log('info', "[$self->{node}] $line");
906 die "remote command failed with exit code $exitcode\n" if $exitcode;
908 die "unable to detect remote migration address\n" if !$raddr;
910 if (scalar(keys %$target_replicated_volumes) != $number_of_online_replicated_volumes) {
911 die "number of replicated disks on source and target node do not match - target node too old?\n"
914 $self->log('info', "start remote tunnel");
915 $self->start_remote_tunnel($raddr, $rport, $ruri, $unix_socket_info);
919 if (defined($self->{online_local_volumes
})) {
920 $self->{storage_migration
} = 1;
921 $self->{storage_migration_jobs
} = {};
922 $self->log('info', "starting storage migration");
924 die "The number of local disks does not match between the source and the destination.\n"
925 if (scalar(keys %{$self->{target_drive
}}) != scalar @{$self->{online_local_volumes
}});
926 foreach my $drive (keys %{$self->{target_drive
}}){
927 my $target = $self->{target_drive
}->{$drive};
928 my $nbd_uri = $target->{nbd_uri
};
930 my $source_drive = PVE
::QemuServer
::parse_drive
($drive, $conf->{$drive});
931 my $source_volid = $source_drive->{file
};
933 my $bwlimit = $local_volumes->{$source_volid}->{bwlimit
};
934 my $bitmap = $target->{bitmap
};
936 $self->log('info', "$drive: start migration to $nbd_uri");
937 PVE
::QemuServer
::qemu_drive_mirror
($vmid, $drive, $nbd_uri, $vmid, undef, $self->{storage_migration_jobs
}, 'skip', undef, $bwlimit, $bitmap);
941 $self->log('info', "starting online/live migration on $ruri");
942 $self->{livemigration
} = 1;
945 my $defaults = PVE
::QemuServer
::load_defaults
();
947 $self->log('info', "set migration_caps");
949 PVE
::QemuServer
::set_migration_caps
($vmid);
953 my $qemu_migrate_params = {};
955 # migrate speed can be set via bwlimit (datacenter.cfg and API) and via the
956 # migrate_speed parameter in qm.conf - take the lower of the two.
957 my $bwlimit = PVE
::Storage
::get_bandwidth_limit
('migration', undef, $self->{opts
}->{bwlimit
}) // 0;
958 my $migrate_speed = $conf->{migrate_speed
} // 0;
959 # migrate_speed is in MB/s, bwlimit in KB/s
960 $migrate_speed *= 1024;
962 if ($bwlimit && $migrate_speed) {
963 $migrate_speed = ($bwlimit < $migrate_speed) ?
$bwlimit : $migrate_speed;
965 $migrate_speed ||= $bwlimit;
968 # always set migrate speed (overwrite kvm default of 32m) we set a very high
969 # default of 8192m which is basically unlimited
970 $migrate_speed ||= ($defaults->{migrate_speed
} || 8192) * 1024;
972 # qmp takes migrate_speed in B/s.
973 $migrate_speed *= 1024;
974 $self->log('info', "migration speed limit: $migrate_speed B/s");
975 $qemu_migrate_params->{'max-bandwidth'} = int($migrate_speed);
977 my $migrate_downtime = $defaults->{migrate_downtime
};
978 $migrate_downtime = $conf->{migrate_downtime
} if defined($conf->{migrate_downtime
});
979 # migrate-set-parameters expects limit in ms
980 $migrate_downtime *= 1000;
981 $self->log('info', "migration downtime limit: $migrate_downtime ms");
982 $qemu_migrate_params->{'downtime-limit'} = int($migrate_downtime);
984 # set cachesize to 10% of the total memory
985 my $memory = $conf->{memory
} || $defaults->{memory
};
986 my $cachesize = int($memory * 1048576 / 10);
987 $cachesize = round_powerof2
($cachesize);
989 $self->log('info', "migration cachesize: $cachesize B");
990 $qemu_migrate_params->{'xbzrle-cache-size'} = int($cachesize);
992 $self->log('info', "set migration parameters");
994 mon_cmd
($vmid, "migrate-set-parameters", %{$qemu_migrate_params});
996 $self->log('info', "migrate-set-parameters error: $@") if $@;
998 if (PVE
::QemuServer
::vga_conf_has_spice
($conf->{vga
})) {
999 my $rpcenv = PVE
::RPCEnvironment
::get
();
1000 my $authuser = $rpcenv->get_user();
1002 my (undef, $proxyticket) = PVE
::AccessControl
::assemble_spice_ticket
($authuser, $vmid, $self->{node
});
1004 my $filename = "/etc/pve/nodes/$self->{node}/pve-ssl.pem";
1005 my $subject = PVE
::AccessControl
::read_x509_subject_spice
($filename);
1007 $self->log('info', "spice client_migrate_info");
1010 mon_cmd
($vmid, "client_migrate_info", protocol
=> 'spice',
1011 hostname
=> $proxyticket, 'port' => 0, 'tls-port' => $spice_port,
1012 'cert-subject' => $subject);
1014 $self->log('info', "client_migrate_info error: $@") if $@;
1018 $self->log('info', "start migrate command to $ruri");
1020 mon_cmd
($vmid, "migrate", uri
=> $ruri);
1023 $self->log('info', "migrate uri => $ruri failed: $merr") if $merr;
1026 my $usleep = 1000000;
1029 my $lastrem = undef;
1030 my $downtimecounter = 0;
1033 my $avglstat = $lstat ?
$lstat / $i : 0;
1038 $stat = mon_cmd
($vmid, "query-migrate");
1042 warn "query migrate failed: $err\n";
1043 $self->log('info', "query migrate failed: $err");
1044 if ($err_count <= 5) {
1048 die "too many query migrate failures - aborting\n";
1051 if (defined($stat->{status
}) && $stat->{status
} =~ m/^(setup)$/im) {
1056 if (defined($stat->{status
}) && $stat->{status
} =~ m/^(active|completed|failed|cancelled)$/im) {
1059 if ($stat->{status
} eq 'completed') {
1060 my $delay = time() - $start;
1062 my $mbps = sprintf "%.2f", $memory / $delay;
1063 my $downtime = $stat->{downtime
} || 0;
1064 $self->log('info', "migration speed: $mbps MB/s - downtime $downtime ms");
1068 if ($stat->{status
} eq 'failed' || $stat->{status
} eq 'cancelled') {
1069 $self->log('info', "migration status error: $stat->{status}");
1073 if ($stat->{status
} ne 'active') {
1074 $self->log('info', "migration status: $stat->{status}");
1078 if ($stat->{ram
}->{transferred
} ne $lstat) {
1079 my $trans = $stat->{ram
}->{transferred
} || 0;
1080 my $rem = $stat->{ram
}->{remaining
} || 0;
1081 my $total = $stat->{ram
}->{total
} || 0;
1082 my $xbzrlecachesize = $stat->{"xbzrle-cache"}->{"cache-size"} || 0;
1083 my $xbzrlebytes = $stat->{"xbzrle-cache"}->{"bytes"} || 0;
1084 my $xbzrlepages = $stat->{"xbzrle-cache"}->{"pages"} || 0;
1085 my $xbzrlecachemiss = $stat->{"xbzrle-cache"}->{"cache-miss"} || 0;
1086 my $xbzrleoverflow = $stat->{"xbzrle-cache"}->{"overflow"} || 0;
1087 # reduce sleep if remainig memory is lower than the average transfer speed
1088 $usleep = 100000 if $avglstat && $rem < $avglstat;
1090 $self->log('info', "migration status: $stat->{status} (transferred ${trans}, " .
1091 "remaining ${rem}), total ${total})");
1093 if (${xbzrlecachesize
}) {
1094 $self->log('info', "migration xbzrle cachesize: ${xbzrlecachesize} transferred ${xbzrlebytes} pages ${xbzrlepages} cachemiss ${xbzrlecachemiss} overflow ${xbzrleoverflow}");
1097 if (($lastrem && $rem > $lastrem ) || ($rem == 0)) {
1102 if ($downtimecounter > 5) {
1103 $downtimecounter = 0;
1104 $migrate_downtime *= 2;
1105 $self->log('info', "auto-increased downtime to continue migration: $migrate_downtime ms");
1107 # migrate-set-parameters does not touch values not
1108 # specified, so this only changes downtime-limit
1109 mon_cmd
($vmid, "migrate-set-parameters", 'downtime-limit' => int($migrate_downtime));
1111 $self->log('info', "migrate-set-parameters error: $@") if $@;
1117 $lstat = $stat->{ram
}->{transferred
};
1121 die "unable to parse migration status '$stat->{status}' - aborting\n";
1126 sub phase2_cleanup
{
1127 my ($self, $vmid, $err) = @_;
1129 return if !$self->{errors
};
1130 $self->{phase2errors
} = 1;
1132 $self->log('info', "aborting phase 2 - cleanup resources");
1134 $self->log('info', "migrate_cancel");
1136 mon_cmd
($vmid, "migrate_cancel");
1138 $self->log('info', "migrate_cancel error: $@") if $@;
1140 my $conf = $self->{vmconf
};
1141 delete $conf->{lock};
1142 eval { PVE
::QemuConfig-
>write_config($vmid, $conf) };
1144 $self->log('err', $err);
1147 # cleanup ressources on target host
1148 if ($self->{storage_migration
}) {
1149 eval { PVE
::QemuServer
::qemu_blockjobs_cancel
($vmid, $self->{storage_migration_jobs
}) };
1151 $self->log('err', $err);
1155 eval { $self->cleanup_bitmaps() };
1157 $self->log('err', $err);
1160 my $nodename = PVE
::INotify
::nodename
();
1162 my $cmd = [@{$self->{rem_ssh
}}, 'qm', 'stop', $vmid, '--skiplock', '--migratedfrom', $nodename];
1163 eval{ PVE
::Tools
::run_command
($cmd, outfunc
=> sub {}, errfunc
=> sub {}) };
1165 $self->log('err', $err);
1166 $self->{errors
} = 1;
1169 # cleanup after stopping, otherwise disks might be in-use by target VM!
1170 eval { PVE
::QemuMigrate
::cleanup_remotedisks
($self) };
1172 $self->log('err', $err);
1176 if ($self->{tunnel
}) {
1177 eval { finish_tunnel
($self, $self->{tunnel
}); };
1179 $self->log('err', $err);
1180 $self->{errors
} = 1;
1186 my ($self, $vmid) = @_;
1191 sub phase3_cleanup
{
1192 my ($self, $vmid, $err) = @_;
1194 my $conf = $self->{vmconf
};
1195 return if $self->{phase2errors
};
1197 my $tunnel = $self->{tunnel
};
1199 if ($self->{storage_migration
}) {
1200 # finish block-job with block-job-cancel, to disconnect source VM from NBD
1201 # to avoid it trying to re-establish it. We are in blockjob ready state,
1202 # thus, this command changes to it to blockjob complete (see qapi docs)
1203 eval { PVE
::QemuServer
::qemu_drive_mirror_monitor
($vmid, undef, $self->{storage_migration_jobs
}, 'cancel'); };
1206 eval { PVE
::QemuServer
::qemu_blockjobs_cancel
($vmid, $self->{storage_migration_jobs
}) };
1207 eval { PVE
::QemuMigrate
::cleanup_remotedisks
($self) };
1208 die "Failed to complete storage migration: $err\n";
1212 if ($self->{volume_map
}) {
1213 my $target_drives = $self->{target_drive
};
1215 # FIXME: for NBD storage migration we now only update the volid, and
1216 # not the full drivestr from the target node. Workaround that until we
1217 # got some real rescan, to avoid things like wrong format in the drive
1218 delete $conf->{$_} for keys %$target_drives;
1219 PVE
::QemuConfig-
>update_volume_ids($conf, $self->{volume_map
});
1221 for my $drive (keys %$target_drives) {
1222 $conf->{$drive} = $target_drives->{$drive}->{drivestr
};
1224 PVE
::QemuConfig-
>write_config($vmid, $conf);
1227 # transfer replication state before move config
1228 $self->transfer_replication_state() if $self->{is_replicated
};
1229 PVE
::QemuConfig-
>move_config_to_node($vmid, $self->{node
});
1230 $self->switch_replication_job_target() if $self->{is_replicated
};
1232 if ($self->{livemigration
}) {
1233 if ($self->{stopnbd
}) {
1234 $self->log('info', "stopping NBD storage migration server on target.");
1235 # stop nbd server on remote vm - requirement for resume since 2.9
1236 my $cmd = [@{$self->{rem_ssh
}}, 'qm', 'nbdstop', $vmid];
1238 eval{ PVE
::Tools
::run_command
($cmd, outfunc
=> sub {}, errfunc
=> sub {}) };
1240 $self->log('err', $err);
1241 $self->{errors
} = 1;
1245 # config moved and nbd server stopped - now we can resume vm on target
1246 if ($tunnel && $tunnel->{version
} && $tunnel->{version
} >= 1) {
1248 $self->write_tunnel($tunnel, 30, "resume $vmid");
1251 $self->log('err', $err);
1252 $self->{errors
} = 1;
1255 my $cmd = [@{$self->{rem_ssh
}}, 'qm', 'resume', $vmid, '--skiplock', '--nocheck'];
1258 $self->log('err', $line);
1260 eval { PVE
::Tools
::run_command
($cmd, outfunc
=> sub {}, errfunc
=> $logf); };
1262 $self->log('err', $err);
1263 $self->{errors
} = 1;
1267 if ($self->{storage_migration
} && PVE
::QemuServer
::parse_guest_agent
($conf)->{fstrim_cloned_disks
} && $self->{running
}) {
1268 my $cmd = [@{$self->{rem_ssh
}}, 'qm', 'guest', 'cmd', $vmid, 'fstrim'];
1269 eval{ PVE
::Tools
::run_command
($cmd, outfunc
=> sub {}, errfunc
=> sub {}) };
1273 # close tunnel on successful migration, on error phase2_cleanup closed it
1275 eval { finish_tunnel
($self, $tunnel); };
1277 $self->log('err', $err);
1278 $self->{errors
} = 1;
1284 if (PVE
::QemuServer
::vga_conf_has_spice
($conf->{vga
}) && $self->{running
}) {
1285 $self->log('info', "Waiting for spice server migration");
1287 my $res = mon_cmd
($vmid, 'query-spice');
1288 last if int($res->{'migrated'}) == 1;
1289 last if $timer > 50;
1296 # always stop local VM
1297 eval { PVE
::QemuServer
::vm_stop
($self->{storecfg
}, $vmid, 1, 1); };
1299 $self->log('err', "stopping vm failed - $err");
1300 $self->{errors
} = 1;
1303 # always deactivate volumes - avoid lvm LVs to be active on several nodes
1305 my $vollist = PVE
::QemuServer
::get_vm_volumes
($conf);
1306 PVE
::Storage
::deactivate_volumes
($self->{storecfg
}, $vollist);
1309 $self->log('err', $err);
1310 $self->{errors
} = 1;
1313 # destroy local copies
1314 foreach my $volid (keys %{$self->{local_volumes
}}) {
1315 # keep replicated volumes!
1316 next if $self->{replicated_volumes
}->{$volid};
1318 eval { PVE
::Storage
::vdisk_free
($self->{storecfg
}, $volid); };
1320 $self->log('err', "removing local copy of '$volid' failed - $err");
1321 $self->{errors
} = 1;
1322 last if $err =~ /^interrupted by signal$/;
1326 # clear migrate lock
1327 my $cmd = [ @{$self->{rem_ssh
}}, 'qm', 'unlock', $vmid ];
1328 $self->cmd_logerr($cmd, errmsg
=> "failed to clear migrate lock");
1332 my ($self, $vmid) = @_;
1337 sub round_powerof2
{
1338 return 1 if $_[0] < 2;
1339 return 2 << int(log($_[0]-1)/log(2));