]>
git.proxmox.com Git - pve-storage.git/blob - PVE/Storage/LVMPlugin.pm
1 package PVE
::Storage
::LVMPlugin
;
8 use PVE
::Tools
qw(run_command trim);
9 use PVE
::Storage
::Plugin
;
10 use PVE
::JSONSchema
qw(get_standard_option);
12 use base
qw(PVE::Storage::Plugin);
14 # lvm helper functions
19 die "no device specified" if !$device;
23 my $cmd = ['/usr/bin/file', '-L', '-s', $device];
24 run_command
($cmd, outfunc
=> sub {
26 $has_label = 1 if $line =~ m/LVM2/;
29 return undef if !$has_label;
31 $cmd = ['/sbin/pvs', '--separator', ':', '--noheadings', '--units', 'k',
32 '--unbuffered', '--nosuffix', '--options',
33 'pv_name,pv_size,vg_name,pv_uuid', $device];
36 run_command
($cmd, outfunc
=> sub {
41 my ($pvname, $size, $vgname, $uuid) = split(':', $line);
43 die "found multiple pvs entries for device '$device'\n"
57 sub clear_first_sector
{
60 if (my $fh = IO
::File-
>new($dev, "w")) {
67 sub lvm_create_volume_group
{
68 my ($device, $vgname, $shared) = @_;
70 my $res = lvm_pv_info
($device);
73 return if $res->{vgname
} eq $vgname; # already created
74 die "device '$device' is already used by volume group '$res->{vgname}'\n";
77 clear_first_sector
($device); # else pvcreate fails
79 # we use --metadatasize 250k, which reseults in "pe_start = 512"
80 # so pe_start is aligned on a 128k boundary (advantage for SSDs)
81 my $cmd = ['/sbin/pvcreate', '--metadatasize', '250k', $device];
83 run_command
($cmd, errmsg
=> "pvcreate '$device' error");
85 $cmd = ['/sbin/vgcreate', $vgname, $device];
86 # push @$cmd, '-c', 'y' if $shared; # we do not use this yet
88 run_command
($cmd, errmsg
=> "vgcreate $vgname $device error");
92 my ($includepvs) = @_;
94 my $cmd = ['/sbin/vgs', '--separator', ':', '--noheadings', '--units', 'b',
95 '--unbuffered', '--nosuffix', '--options'];
97 my $cols = [qw(vg_name vg_size vg_free lv_count)];
100 push @$cols, qw(pv_name pv_size pv_free);
103 push @$cmd, join(',', @$cols);
107 run_command
($cmd, outfunc
=> sub {
112 my ($name, $size, $free, $lvcount, $pvname, $pvsize, $pvfree) = split (':', $line);
114 $vgs->{$name} = { size
=> int ($size), free
=> int ($free), lvcount
=> int($lvcount) }
117 if (defined($pvname) && defined($pvsize) && defined($pvfree)) {
118 push @{$vgs->{$name}->{pvs
}}, {
120 size
=> int($pvsize),
121 free
=> int($pvfree),
128 # just warn (vgs return error code 5 if clvmd does not run)
129 # but output is still OK (list without clustered VGs)
135 sub lvm_list_volumes
{
138 my $cmd = ['/sbin/lvs', '--separator', ':', '--noheadings', '--units', 'b',
139 '--unbuffered', '--nosuffix', '--options',
140 'vg_name,lv_name,lv_size,lv_attr,pool_lv,data_percent,metadata_percent,snap_percent,uuid,tags,metadata_size'];
142 push @$cmd, $vgname if $vgname;
145 run_command
($cmd, outfunc
=> sub {
150 my ($vg_name, $lv_name, $lv_size, $lv_attr, $pool_lv, $data_percent, $meta_percent, $snap_percent, $uuid, $tags, $meta_size) = split(':', $line);
154 my $lv_type = substr($lv_attr, 0, 1);
157 lv_size
=> int($lv_size),
160 $d->{pool_lv
} = $pool_lv if $pool_lv;
161 $d->{tags
} = $tags if $tags;
163 if ($lv_type eq 't') {
167 $d->{metadata_size
} = int($meta_size);
168 $d->{metadata_used
} = int(($meta_percent * $meta_size)/100);
169 $d->{used
} = int(($data_percent * $lv_size)/100);
171 $lvs->{$vg_name}->{$lv_name} = $d;
185 content
=> [ {images
=> 1, rootdir
=> 1}, { images
=> 1 }],
192 description
=> "Volume group name.",
193 type
=> 'string', format
=> 'pve-storage-vgname',
196 description
=> "Base volume. This volume is automatically activated.",
197 type
=> 'string', format
=> 'pve-volume-id',
200 description
=> "Zero-out data when removing LVs.",
203 saferemove_throughput
=> {
204 description
=> "Wipe throughput (cstream -t parameter value).",
208 description
=> "Only use logical volumes tagged with 'pve-vm-ID'.",
216 vgname
=> { fixed
=> 1 },
217 nodes
=> { optional
=> 1 },
218 shared
=> { optional
=> 1 },
219 disable
=> { optional
=> 1 },
220 saferemove
=> { optional
=> 1 },
221 saferemove_throughput
=> { optional
=> 1 },
222 content
=> { optional
=> 1 },
223 base
=> { fixed
=> 1, optional
=> 1 },
224 tagged_only
=> { optional
=> 1 },
225 bwlimit
=> { optional
=> 1 },
229 # Storage implementation
232 my ($class, $storeid, $scfg, %param) = @_;
234 if (my $base = $scfg->{base
}) {
235 my ($baseid, $volname) = PVE
::Storage
::parse_volume_id
($base);
237 my $cfg = PVE
::Storage
::config
();
238 my $basecfg = PVE
::Storage
::storage_config
($cfg, $baseid, 1);
239 die "base storage ID '$baseid' does not exist\n" if !$basecfg;
241 # we only support iscsi for now
242 die "unsupported base type '$basecfg->{type}'"
243 if $basecfg->{type
} ne 'iscsi';
245 my $path = PVE
::Storage
::path
($cfg, $base);
247 PVE
::Storage
::activate_storage
($cfg, $baseid);
249 lvm_create_volume_group
($path, $scfg->{vgname
}, $scfg->{shared
});
254 my ($class, $volname) = @_;
256 PVE
::Storage
::Plugin
::parse_lvm_name
($volname);
258 if ($volname =~ m/^(vm-(\d+)-\S+)$/) {
259 return ('images', $1, $2, undef, undef, undef, 'raw');
262 die "unable to parse lvm volume name '$volname'\n";
265 sub filesystem_path
{
266 my ($class, $scfg, $volname, $snapname) = @_;
268 die "lvm snapshot is not implemented"if defined($snapname);
270 my ($vtype, $name, $vmid) = $class->parse_volname($volname);
272 my $vg = $scfg->{vgname
};
274 my $path = "/dev/$vg/$name";
276 return wantarray ?
($path, $vmid, $vtype) : $path;
280 my ($class, $storeid, $scfg, $volname) = @_;
282 die "can't create base images in lvm storage\n";
286 my ($class, $scfg, $storeid, $volname, $vmid, $snap) = @_;
288 die "can't clone images in lvm storage\n";
291 sub lvm_find_free_diskname
{
292 my ($lvs, $vg, $storeid, $vmid) = @_;
296 for (my $i = 1; $i < 100; $i++) {
297 my $tn = "vm-$vmid-disk-$i";
298 if (!defined ($lvs->{$vg}->{$tn})) {
304 die "unable to allocate an image name for ID $vmid in storage '$storeid'\n"
311 my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_;
313 die "unsupported format '$fmt'" if $fmt ne 'raw';
315 die "illegal name '$name' - sould be 'vm-$vmid-*'\n"
316 if $name && $name !~ m/^vm-$vmid-/;
320 my $vg = $scfg->{vgname
};
322 die "no such volume group '$vg'\n" if !defined ($vgs->{$vg});
324 my $free = int($vgs->{$vg}->{free
});
326 die "not enough free space ($free < $size)\n" if $free < $size;
328 $name = lvm_find_free_diskname
(lvm_list_volumes
($vg), $vg, $storeid, $vmid)
331 my $cmd = ['/sbin/lvcreate', '-aly', '--addtag', "pve-vm-$vmid", '--size', "${size}k", '--name', $name, $vg];
333 run_command
($cmd, errmsg
=> "lvcreate '$vg/pve-vm-$vmid' error");
339 my ($class, $storeid, $scfg, $volname, $isBase) = @_;
341 my $vg = $scfg->{vgname
};
343 # we need to zero out LVM data for security reasons
344 # and to allow thin provisioning
346 my $zero_out_worker = sub {
347 print "zero-out data on image $volname (/dev/$vg/del-$volname)\n";
349 # wipe throughput up to 10MB/s by default; may be overwritten with saferemove_throughput
350 my $throughput = '-10485760';
351 if ($scfg->{saferemove_throughput
}) {
352 $throughput = $scfg->{saferemove_throughput
};
358 '-o', "/dev/$vg/del-$volname",
364 eval { run_command
($cmd, errmsg
=> "zero out finished (note: 'No space left on device' is ok here)"); };
367 $class->cluster_lock_storage($storeid, $scfg->{shared
}, undef, sub {
368 my $cmd = ['/sbin/lvremove', '-f', "$vg/del-$volname"];
369 run_command
($cmd, errmsg
=> "lvremove '$vg/del-$volname' error");
371 print "successfully removed volume $volname ($vg/del-$volname)\n";
374 my $cmd = ['/sbin/lvchange', '-aly', "$vg/$volname"];
375 run_command
($cmd, errmsg
=> "can't activate LV '$vg/$volname' to zero-out its data");
377 if ($scfg->{saferemove
}) {
378 # avoid long running task, so we only rename here
379 $cmd = ['/sbin/lvrename', $vg, $volname, "del-$volname"];
380 run_command
($cmd, errmsg
=> "lvrename '$vg/$volname' error");
381 return $zero_out_worker;
383 my $tmpvg = $scfg->{vgname
};
384 $cmd = ['/sbin/lvremove', '-f', "$tmpvg/$volname"];
385 run_command
($cmd, errmsg
=> "lvremove '$tmpvg/$volname' error");
391 my $check_tags = sub {
394 return defined($tags) && $tags =~ /(^|,)pve-vm-\d+(,|$)/;
398 my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_;
400 my $vgname = $scfg->{vgname
};
402 $cache->{lvs
} = lvm_list_volumes
() if !$cache->{lvs
};
406 if (my $dat = $cache->{lvs
}->{$vgname}) {
408 foreach my $volname (keys %$dat) {
410 next if $volname !~ m/^vm-(\d+)-/;
413 my $info = $dat->{$volname};
415 next if $scfg->{tagged_only
} && !&$check_tags($info->{tags
});
417 next if $info->{lv_type
} ne '-';
419 my $volid = "$storeid:$volname";
422 my $found = grep { $_ eq $volid } @$vollist;
425 next if defined($vmid) && ($owner ne $vmid);
429 volid
=> $volid, format
=> 'raw', size
=> $info->{lv_size
}, vmid
=> $owner,
438 my ($class, $storeid, $scfg, $cache) = @_;
440 $cache->{vgs
} = lvm_vgs
() if !$cache->{vgs
};
442 my $vgname = $scfg->{vgname
};
444 if (my $info = $cache->{vgs
}->{$vgname}) {
445 return ($info->{size
}, $info->{free
}, $info->{size
} - $info->{free
}, 1);
451 sub activate_storage
{
452 my ($class, $storeid, $scfg, $cache) = @_;
454 $cache->{vgs
} = lvm_vgs
() if !$cache->{vgs
};
456 # In LVM2, vgscans take place automatically;
457 # this is just to be sure
458 if ($cache->{vgs
} && !$cache->{vgscaned
} &&
459 !$cache->{vgs
}->{$scfg->{vgname
}}) {
460 $cache->{vgscaned
} = 1;
461 my $cmd = ['/sbin/vgscan', '--ignorelockingfailure', '--mknodes'];
462 eval { run_command
($cmd, outfunc
=> sub {}); };
466 # we do not acticate any volumes here ('vgchange -aly')
467 # instead, volumes are activate individually later
470 sub deactivate_storage
{
471 my ($class, $storeid, $scfg, $cache) = @_;
473 my $cmd = ['/sbin/vgchange', '-aln', $scfg->{vgname
}];
474 run_command
($cmd, errmsg
=> "can't deactivate VG '$scfg->{vgname}'");
477 sub activate_volume
{
478 my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
479 #fix me lvmchange is not provided on
480 my $path = $class->path($scfg, $volname, $snapname);
482 my $lvm_activate_mode = 'ey';
484 my $cmd = ['/sbin/lvchange', "-a$lvm_activate_mode", $path];
485 run_command
($cmd, errmsg
=> "can't activate LV '$path'");
488 sub deactivate_volume
{
489 my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
491 my $path = $class->path($scfg, $volname, $snapname);
492 return if ! -b
$path;
494 my $cmd = ['/sbin/lvchange', '-aln', $path];
495 run_command
($cmd, errmsg
=> "can't deactivate LV '$path'");
499 my ($class, $scfg, $storeid, $volname, $size, $running) = @_;
501 $size = ($size/1024/1024) . "M";
503 my $path = $class->path($scfg, $volname);
504 my $cmd = ['/sbin/lvextend', '-L', $size, $path];
505 run_command
($cmd, errmsg
=> "error resizing volume '$path'");
510 sub volume_snapshot
{
511 my ($class, $scfg, $storeid, $volname, $snap) = @_;
513 die "lvm snapshot is not implemented";
516 sub volume_snapshot_rollback
{
517 my ($class, $scfg, $storeid, $volname, $snap) = @_;
519 die "lvm snapshot rollback is not implemented";
522 sub volume_snapshot_delete
{
523 my ($class, $scfg, $storeid, $volname, $snap) = @_;
525 die "lvm snapshot delete is not implemented";
528 sub volume_has_feature
{
529 my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_;
532 copy
=> { base
=> 1, current
=> 1},
535 my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) =
536 $class->parse_volname($volname);
542 $key = $isBase ?
'base' : 'current';
544 return 1 if $features->{$feature}->{$key};
549 sub volume_export_formats
{
550 my ($class, $scfg, $storeid, $volname, $snapshot, $base_snapshot, $with_snapshots) = @_;
551 return () if defined($snapshot); # lvm-thin only
552 return volume_import_formats
($class, $scfg, $storeid, $volname, $base_snapshot, $with_snapshots);
556 my ($class, $scfg, $storeid, $fh, $volname, $format, $snapshot, $base_snapshot, $with_snapshots) = @_;
557 die "volume export format $format not available for $class\n"
558 if $format ne 'raw+size';
559 die "cannot export volumes together with their snapshots in $class\n"
561 die "cannot export a snapshot in $class\n" if defined($snapshot);
562 die "cannot export an incremental stream in $class\n" if defined($base_snapshot);
563 my $file = $class->path($scfg, $volname, $storeid);
565 # should be faster than querying LVM, also checks for the device file's availability
566 run_command
(['/sbin/blockdev', '--getsize64', $file], outfunc
=> sub {
568 die "unexpected output from /sbin/blockdev: $line\n" if $line !~ /^(\d+)$/;
571 PVE
::Storage
::Plugin
::write_common_header
($fh, $size);
572 run_command
(['dd', "if=$file", "bs=64k"], output
=> '>&'.fileno($fh));
575 sub volume_import_formats
{
576 my ($class, $scfg, $storeid, $volname, $base_snapshot, $with_snapshots) = @_;
577 return () if $with_snapshots; # not supported
578 return () if defined($base_snapshot); # not supported
583 my ($class, $scfg, $storeid, $fh, $volname, $format, $base_snapshot, $with_snapshots) = @_;
584 die "volume import format $format not available for $class\n"
585 if $format ne 'raw+size';
586 die "cannot import volumes together with their snapshots in $class\n"
588 die "cannot import an incremental stream in $class\n" if defined($base_snapshot);
590 my ($vtype, $name, $vmid, $basename, $basevmid, $isBase, $file_format) =
591 $class->parse_volname($volname);
592 die "cannot import format $format into a file of format $file_format\n"
593 if $file_format ne 'raw';
595 my $vg = $scfg->{vgname
};
596 my $lvs = lvm_list_volumes
($vg);
597 die "volume $vg/$volname already exists\n"
598 if $lvs->{$vg}->{$volname};
600 my ($size) = PVE
::Storage
::Plugin
::read_common_header
($fh);
601 $size = int($size/1024);
604 my $allocname = $class->alloc_image($storeid, $scfg, $vmid, 'raw', $name, $size);
605 if ($allocname ne $volname) {
606 my $oldname = $volname;
607 $volname = $allocname; # Let the cleanup code know what to free
608 die "internal error: unexpected allocated name: '$allocname' != '$oldname'\n";
610 my $file = $class->path($scfg, $volname, $storeid)
611 or die "internal error: failed to get path to newly allocated volume $volname\n";
612 run_command
(['dd', "of=$file", 'conv=sparse', 'bs=64k'],
613 input
=> '<&'.fileno($fh));
616 eval { $class->free_image($storeid, $scfg, $volname, 0) };