[pve-container.git] / src / PVE / LXC / Migrate.pm

package PVE::LXC::Migrate;

use strict;
use warnings;
use PVE::AbstractMigrate;
use File::Basename;
use File::Copy; # fixme: remove
use PVE::Tools;
use PVE::INotify;
use PVE::Cluster;
use PVE::Storage;
use PVE::LXC;

use base qw(PVE::AbstractMigrate);

sub lock_vm {
    my ($self, $vmid, $code, @param) = @_;

    return PVE::LXC::Config->lock_config($vmid, $code, @param);
}

sub prepare {
    my ($self, $vmid) = @_;

    my $online = $self->{opts}->{online};

    $self->{storecfg} = PVE::Storage::config();

    # test if CT exists
    my $conf = $self->{vmconf} = PVE::LXC::Config->load_config($vmid);

    PVE::LXC::Config->check_lock($conf);

    my $running = 0;
    if (PVE::LXC::check_running($vmid)) {
	die "lxc live migration is currently not implemented\n";

	die "can't migrate running container without --online\n" if !$online;
	$running = 1;
    }

    my $force = $self->{opts}->{force} // 0;
    my $need_activate = [];

    PVE::LXC::Config->foreach_mountpoint($conf, sub {
	my ($ms, $mountpoint) = @_;

	my $volid = $mountpoint->{volume};

	# skip dev/bind mps when forced
	if ($mountpoint->{type} ne 'volume' && $force) {
	    return;
	}
	my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1) if $volid;
	die "can't determine assigned storage for mountpoint '$ms'\n" if !$storage;

	# check if storage is available on both nodes
	my $scfg = PVE::Storage::storage_check_node($self->{storecfg}, $storage);
	PVE::Storage::storage_check_node($self->{storecfg}, $storage, $self->{node});


	if ($scfg->{shared}) {
	    # PVE::Storage::activate_storage checks this for non-shared storages
	    my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
	    warn "Used shared storage '$storage' is not online on source node!\n"
		if !$plugin->check_connection($storage, $scfg);
	} else {
	    # only activate if not shared
	    push @$need_activate, $volid;

	    die "unable to migrate local mountpoint '$volid' while CT is running"
		if $running;
	}

    });

    PVE::Storage::activate_volumes($self->{storecfg}, $need_activate);

    # todo: test if VM uses local resources

    # test ssh connection
    my $cmd = [ @{$self->{rem_ssh}}, '/bin/true' ];
    eval { $self->cmd_quiet($cmd); };
    die "Can't connect to destination address using public key\n" if $@;

    return $running;
}

sub phase1 {
    my ($self, $vmid) = @_;

    $self->log('info', "starting migration of CT $self->{vmid} to node '$self->{node}' ($self->{nodeip})");

    my $conf = $self->{vmconf};
    $conf->{lock} = 'migrate';
    PVE::LXC::Config->write_config($vmid, $conf);

    if ($self->{running}) {
	$self->log('info', "container is running - using online migration");
    }

    $self->{volumes} = []; # list of already migrated volumes
    my $volhash = {}; # 1 for local volumes

    my $test_volid = sub {
	my ($volid, $snapname) = @_;

	return if !$volid;

	my ($sid, $volname) = PVE::Storage::parse_volume_id($volid);

	# check if storage is available on both nodes
	my $scfg = PVE::Storage::storage_check_node($self->{storecfg}, $sid);
	PVE::Storage::storage_check_node($self->{storecfg}, $sid, $self->{node});

	return if $scfg->{shared};

	my ($path, $owner) = PVE::Storage::path($self->{storecfg}, $volid);

	die "can't migrate volume '$volid' - owned by other guest (owner = $owner)\n"
	    if !$owner || ($owner != $self->{vmid});

	if (defined($snapname)) {
	    # we cannot migrate shapshots on local storage
	    # exceptions: 'zfspool'
	    if (($scfg->{type} eq 'zfspool')) {
		$volhash->{$volid} = 1;
		return;
	    }
	    die "can't migrate snapshot of local volume '$volid'\n";
	} else {
	    $volhash->{$volid} = 1;
	}
    };

    my $test_mp = sub {
	my ($ms, $mountpoint, $snapname) = @_;

	my $volid = $mountpoint->{volume};
	# already checked in prepare
	if ($mountpoint->{type} ne 'volume') {
	    $self->log('info', "ignoring mountpoint '$ms' ('$volid') of type " .
		"'$mountpoint->{type}', migration is forced.")
		if !$snapname;
	    return;
	}

	my ($storage, $volname) = PVE::Storage::parse_volume_id($volid);
	my $scfg = PVE::Storage::storage_check_node($self->{storecfg}, $storage);

	if (!$scfg->{shared}) {
	    $self->log('info', "copy mountpoint '$ms' ($volid) to node ' $self->{node}'")
		if !$snapname;
	    $volhash->{$volid} = 1;
	} else {
	    $self->log('info', "mountpoint '$ms' is on shared storage '$storage'")
		if !$snapname;
	}
	&$test_volid($volid, $snapname);
    };

    # first all currently used volumes
    PVE::LXC::Config->foreach_mountpoint($conf, $test_mp);

    # then all volumes referenced in snapshots
    foreach my $snapname (keys %{$conf->{snapshots}}) {
	&$test_volid($conf->{snapshots}->{$snapname}->{'vmstate'}, 0, undef)
	    if defined($conf->{snapshots}->{$snapname}->{'vmstate'});
	PVE::LXC::Config->foreach_mountpoint($conf->{snapshots}->{$snapname}, $test_mp, $snapname);
    }

    # finally unused / lost volumes owned by this container
    my @sids = PVE::Storage::storage_ids($self->{storecfg});
    foreach my $storeid (@sids) {
	my $scfg = PVE::Storage::storage_config($self->{storecfg}, $storeid);
	next if $scfg->{shared};
	next if !PVE::Storage::storage_check_enabled($self->{storecfg}, $storeid, undef, 1);

	# get list from PVE::Storage (for unused volumes)
	my $dl = PVE::Storage::vdisk_list($self->{storecfg}, $storeid, $vmid);

	next if @{$dl->{$storeid}} == 0;

	# check if storage is available on target node
	PVE::Storage::storage_check_node($self->{storecfg}, $storeid, $self->{node});

	PVE::Storage::foreach_volid($dl, sub {
	    my ($volid, $sid, $volname) = @_;

	    $self->log('info', "copy volume '$volid' to node '$self->{node}'")
		if !$volhash->{$volid};
	    $volhash->{$volid} = 1;
	});
    }

    # additional checks for local storage
    foreach my $volid (keys %$volhash) {
	my ($sid, $volname) = PVE::Storage::parse_volume_id($volid);
	my $scfg =  PVE::Storage::storage_config($self->{storecfg}, $sid);

	my $migratable = ($scfg->{type} eq 'dir') || ($scfg->{type} eq 'zfspool') ||
	    ($scfg->{type} eq 'lvmthin') || ($scfg->{type} eq 'lvm');

	die "can't migrate '$volid' - storage type '$scfg->{type}' not supported\n"
	    if !$migratable;

	# image is a linked clone on local storage, se we can't migrate.
	if (my $basename = (PVE::Storage::parse_volname($self->{storecfg}, $volid))[3]) {
	    die "can't migrate '$volid' as it's a clone of '$basename'";
	}
    }

    foreach my $volid (keys %$volhash) {
	my ($sid, $volname) = PVE::Storage::parse_volume_id($volid);
	push @{$self->{volumes}}, $volid;
	PVE::Storage::storage_migrate($self->{storecfg}, $volid, $self->{nodeip}, $sid);
    }

    my $conffile = PVE::LXC::Config->config_file($vmid);
    my $newconffile = PVE::LXC::Config->config_file($vmid, $self->{node});

    if ($self->{running}) {
	die "implement me";
    }

    # make sure everything on (shared) storage is unmounted
    # Note: we must be 100% sure, else we get data corruption because
    # non-shared file system could be mounted twice (on shared storage)

    PVE::LXC::umount_all($vmid, $self->{storecfg}, $conf);

    #to be sure there are no active volumes
    my $vollist = PVE::LXC::Config->get_vm_volumes($conf);
    PVE::Storage::deactivate_volumes($self->{storecfg}, $vollist);

    # move config
    die "Failed to move config to node '$self->{node}' - rename failed: $!\n"
	if !rename($conffile, $newconffile);

    $self->{conf_migrated} = 1;
}

sub phase1_cleanup {
    my ($self, $vmid, $err) = @_;

    $self->log('info', "aborting phase 1 - cleanup resources");

    if ($self->{volumes}) {
	foreach my $volid (@{$self->{volumes}}) {
	    $self->log('err', "found stale volume copy '$volid' on node '$self->{node}'");
	    # fixme: try to remove ?
	}
    }
}

sub phase3 {
    my ($self, $vmid) = @_;

    my $volids = $self->{volumes};

    # destroy local copies
    foreach my $volid (@$volids) {
	eval { PVE::Storage::vdisk_free($self->{storecfg}, $volid); };
	if (my $err = $@) {
	    $self->log('err', "removing local copy of '$volid' failed - $err");
	    $self->{errors} = 1;
	    last if $err =~ /^interrupted by signal$/;
	}
    }
}

sub final_cleanup {
    my ($self, $vmid) = @_;

    $self->log('info', "start final cleanup");

    if (!$self->{conf_migrated}) {
	my $conf = $self->{vmconf};
	delete $conf->{lock};

	eval { PVE::LXC::Config->write_config($vmid, $conf); };
	if (my $err = $@) {
	    $self->log('err', $err);
	}
    } else {
	my $cmd = [ @{$self->{rem_ssh}}, 'pct', 'unlock', $vmid ];
	$self->cmd_logerr($cmd, errmsg => "failed to clear migrate lock");	
    }
}

1;
Commit	Line	Data
6f42807e DM	1	package PVE::LXC::Migrate;
	2
	3	use strict;
	4	use warnings;
	5	use PVE::AbstractMigrate;
	6	use File::Basename;
	7	use File::Copy; # fixme: remove
	8	use PVE::Tools;
	9	use PVE::INotify;
	10	use PVE::Cluster;
	11	use PVE::Storage;
	12	use PVE::LXC;
	13
	14	use base qw(PVE::AbstractMigrate);
	15
	16	sub lock_vm {
	17	my ($self, $vmid, $code, @param) = @_;
	18
67afe46e	19	return PVE::LXC::Config->lock_config($vmid, $code, @param);
6f42807e DM	20	}
	21
	22	sub prepare {
	23	my ($self, $vmid) = @_;
	24
	25	my $online = $self->{opts}->{online};
	26
	27	$self->{storecfg} = PVE::Storage::config();
	28
1cd1fa12	29	# test if CT exists
67afe46e	30	my $conf = $self->{vmconf} = PVE::LXC::Config->load_config($vmid);
6f42807e	31
67afe46e	32	PVE::LXC::Config->check_lock($conf);
6f42807e DM	33
	34	my $running = 0;
	35	if (PVE::LXC::check_running($vmid)) {
	36	die "lxc live migration is currently not implemented\n";
	37
fc181735	38	die "can't migrate running container without --online\n" if !$online;
6f42807e DM	39	$running = 1;
	40	}
	41
9746c095	42	my $force = $self->{opts}->{force} // 0;
20ab40f3	43	my $need_activate = [];
9746c095	44
d250604f	45	PVE::LXC::Config->foreach_mountpoint($conf, sub {
6f42807e DM	46	my ($ms, $mountpoint) = @_;
	47
	48	my $volid = $mountpoint->{volume};
9746c095 FG	49
	50	# skip dev/bind mps when forced
	51	if ($mountpoint->{type} ne 'volume' && $force) {
	52	return;
	53	}
6f42807e DM	54	my ($storage, $volname) = PVE::Storage::parse_volume_id($volid, 1) if $volid;
	55	die "can't determine assigned storage for mountpoint '$ms'\n" if !$storage;
	56
	57	# check if storage is available on both nodes
	58	my $scfg = PVE::Storage::storage_check_node($self->{storecfg}, $storage);
	59	PVE::Storage::storage_check_node($self->{storecfg}, $storage, $self->{node});
	60
20ab40f3 FG	61
	62	if ($scfg->{shared}) {
	63	# PVE::Storage::activate_storage checks this for non-shared storages
	64	my $plugin = PVE::Storage::Plugin->lookup($scfg->{type});
	65	warn "Used shared storage '$storage' is not online on source node!\n"
	66	if !$plugin->check_connection($storage, $scfg);
	67	} else {
	68	# only activate if not shared
	69	push @$need_activate, $volid;
	70
	71	die "unable to migrate local mountpoint '$volid' while CT is running"
	72	if $running;
	73	}
6f42807e DM	74
	75	});
	76
20ab40f3	77	PVE::Storage::activate_volumes($self->{storecfg}, $need_activate);
6f42807e DM	78
	79	# todo: test if VM uses local resources
	80
	81	# test ssh connection
	82	my $cmd = [ @{$self->{rem_ssh}}, '/bin/true' ];
	83	eval { $self->cmd_quiet($cmd); };
	84	die "Can't connect to destination address using public key\n" if $@;
	85
	86	return $running;
	87	}
	88
	89	sub phase1 {
	90	my ($self, $vmid) = @_;
	91
	92	$self->log('info', "starting migration of CT $self->{vmid} to node '$self->{node}' ($self->{nodeip})");
	93
	94	my $conf = $self->{vmconf};
	95	$conf->{lock} = 'migrate';
67afe46e	96	PVE::LXC::Config->write_config($vmid, $conf);
6f42807e DM	97
	98	if ($self->{running}) {
	99	$self->log('info', "container is running - using online migration");
	100	}
	101
3c5dabe1 FG	102	$self->{volumes} = []; # list of already migrated volumes
3c5dabe1 FG	103	my $volhash = {}; # 1 for local volumes
6f42807e	104
3c5dabe1 FG	105	my $test_volid = sub {
3c5dabe1 FG	106	my ($volid, $snapname) = @_;
6f42807e	107
3c5dabe1 FG	108	return if !$volid;
	109
	110	my ($sid, $volname) = PVE::Storage::parse_volume_id($volid);
	111
	112	# check if storage is available on both nodes
	113	my $scfg = PVE::Storage::storage_check_node($self->{storecfg}, $sid);
	114	PVE::Storage::storage_check_node($self->{storecfg}, $sid, $self->{node});
	115
	116	return if $scfg->{shared};
	117
	118	my ($path, $owner) = PVE::Storage::path($self->{storecfg}, $volid);
	119
	120	die "can't migrate volume '$volid' - owned by other guest (owner = $owner)\n"
	121	if !$owner \|\| ($owner != $self->{vmid});
9746c095	122
3c5dabe1 FG	123	if (defined($snapname)) {
	124	# we cannot migrate shapshots on local storage
	125	# exceptions: 'zfspool'
	126	if (($scfg->{type} eq 'zfspool')) {
	127	$volhash->{$volid} = 1;
	128	return;
	129	}
	130	die "can't migrate snapshot of local volume '$volid'\n";
	131	} else {
	132	$volhash->{$volid} = 1;
	133	}
	134	};
	135
	136	my $test_mp = sub {
	137	my ($ms, $mountpoint, $snapname) = @_;
	138
	139	my $volid = $mountpoint->{volume};
9746c095 FG	140	# already checked in prepare
	141	if ($mountpoint->{type} ne 'volume') {
	142	$self->log('info', "ignoring mountpoint '$ms' ('$volid') of type " .
3c5dabe1 FG	143	"'$mountpoint->{type}', migration is forced.")
3c5dabe1 FG	144	if !$snapname;
9746c095 FG	145	return;
	146	}
	147
6f42807e DM	148	my ($storage, $volname) = PVE::Storage::parse_volume_id($volid);
	149	my $scfg = PVE::Storage::storage_check_node($self->{storecfg}, $storage);
	150
	151	if (!$scfg->{shared}) {
3c5dabe1 FG	152	$self->log('info', "copy mountpoint '$ms' ($volid) to node ' $self->{node}'")
	153	if !$snapname;
	154	$volhash->{$volid} = 1;
6f42807e	155	} else {
3c5dabe1 FG	156	$self->log('info', "mountpoint '$ms' is on shared storage '$storage'")
3c5dabe1 FG	157	if !$snapname;
6f42807e	158	}
3c5dabe1 FG	159	&$test_volid($volid, $snapname);
	160	};
	161
	162	# first all currently used volumes
	163	PVE::LXC::Config->foreach_mountpoint($conf, $test_mp);
	164
	165	# then all volumes referenced in snapshots
	166	foreach my $snapname (keys %{$conf->{snapshots}}) {
	167	&$test_volid($conf->{snapshots}->{$snapname}->{'vmstate'}, 0, undef)
	168	if defined($conf->{snapshots}->{$snapname}->{'vmstate'});
	169	PVE::LXC::Config->foreach_mountpoint($conf->{snapshots}->{$snapname}, $test_mp, $snapname);
	170	}
	171
	172	# finally unused / lost volumes owned by this container
	173	my @sids = PVE::Storage::storage_ids($self->{storecfg});
	174	foreach my $storeid (@sids) {
	175	my $scfg = PVE::Storage::storage_config($self->{storecfg}, $storeid);
	176	next if $scfg->{shared};
	177	next if !PVE::Storage::storage_check_enabled($self->{storecfg}, $storeid, undef, 1);
	178
	179	# get list from PVE::Storage (for unused volumes)
	180	my $dl = PVE::Storage::vdisk_list($self->{storecfg}, $storeid, $vmid);
	181
	182	next if @{$dl->{$storeid}} == 0;
	183
	184	# check if storage is available on target node
	185	PVE::Storage::storage_check_node($self->{storecfg}, $storeid, $self->{node});
	186
	187	PVE::Storage::foreach_volid($dl, sub {
	188	my ($volid, $sid, $volname) = @_;
	189
	190	$self->log('info', "copy volume '$volid' to node '$self->{node}'")
	191	if !$volhash->{$volid};
	192	$volhash->{$volid} = 1;
	193	});
	194	}
	195
	196	# additional checks for local storage
	197	foreach my $volid (keys %$volhash) {
	198	my ($sid, $volname) = PVE::Storage::parse_volume_id($volid);
	199	my $scfg = PVE::Storage::storage_config($self->{storecfg}, $sid);
	200
	201	my $migratable = ($scfg->{type} eq 'dir') \|\| ($scfg->{type} eq 'zfspool') \|\|
	202	($scfg->{type} eq 'lvmthin') \|\| ($scfg->{type} eq 'lvm');
	203
	204	die "can't migrate '$volid' - storage type '$scfg->{type}' not supported\n"
	205	if !$migratable;
	206
	207	# image is a linked clone on local storage, se we can't migrate.
	208	if (my $basename = (PVE::Storage::parse_volname($self->{storecfg}, $volid))[3]) {
	209	die "can't migrate '$volid' as it's a clone of '$basename'";
	210	}
	211	}
	212
	213	foreach my $volid (keys %$volhash) {
	214	my ($sid, $volname) = PVE::Storage::parse_volume_id($volid);
	215	push @{$self->{volumes}}, $volid;
	216	PVE::Storage::storage_migrate($self->{storecfg}, $volid, $self->{nodeip}, $sid);
	217	}
6f42807e	218
67afe46e FG	219	my $conffile = PVE::LXC::Config->config_file($vmid);
67afe46e FG	220	my $newconffile = PVE::LXC::Config->config_file($vmid, $self->{node});
6f42807e DM	221
	222	if ($self->{running}) {
	223	die "implement me";
	224	}
	225
	226	# make sure everything on (shared) storage is unmounted
	227	# Note: we must be 100% sure, else we get data corruption because
	228	# non-shared file system could be mounted twice (on shared storage)
	229
	230	PVE::LXC::umount_all($vmid, $self->{storecfg}, $conf);
	231
c9bc5018	232	#to be sure there are no active volumes
d250604f	233	my $vollist = PVE::LXC::Config->get_vm_volumes($conf);
c9bc5018 WL	234	PVE::Storage::deactivate_volumes($self->{storecfg}, $vollist);
c9bc5018 WL	235
6f42807e DM	236	# move config
	237	die "Failed to move config to node '$self->{node}' - rename failed: $!\n"
	238	if !rename($conffile, $newconffile);
1d1c1b4f WL	239
1d1c1b4f WL	240	$self->{conf_migrated} = 1;
6f42807e DM	241	}
	242
	243	sub phase1_cleanup {
	244	my ($self, $vmid, $err) = @_;
	245
	246	$self->log('info', "aborting phase 1 - cleanup resources");
	247
	248	if ($self->{volumes}) {
	249	foreach my $volid (@{$self->{volumes}}) {
	250	$self->log('err', "found stale volume copy '$volid' on node '$self->{node}'");
	251	# fixme: try to remove ?
	252	}
	253	}
	254	}
	255
	256	sub phase3 {
	257	my ($self, $vmid) = @_;
	258
	259	my $volids = $self->{volumes};
	260
	261	# destroy local copies
	262	foreach my $volid (@$volids) {
	263	eval { PVE::Storage::vdisk_free($self->{storecfg}, $volid); };
	264	if (my $err = $@) {
	265	$self->log('err', "removing local copy of '$volid' failed - $err");
	266	$self->{errors} = 1;
	267	last if $err =~ /^interrupted by signal$/;
	268	}
	269	}
	270	}
	271
	272	sub final_cleanup {
	273	my ($self, $vmid) = @_;
	274
	275	$self->log('info', "start final cleanup");
	276
1d1c1b4f WL	277	if (!$self->{conf_migrated}) {
	278	my $conf = $self->{vmconf};
	279	delete $conf->{lock};
6f42807e	280
67afe46e	281	eval { PVE::LXC::Config->write_config($vmid, $conf); };
1d1c1b4f WL	282	if (my $err = $@) {
	283	$self->log('err', $err);
	284	}
	285	} else {
	286	my $cmd = [ @{$self->{rem_ssh}}, 'pct', 'unlock', $vmid ];
	287	$self->cmd_logerr($cmd, errmsg => "failed to clear migrate lock");
6f42807e DM	288	}
	289	}
	290
	291	1;