]>
git.proxmox.com Git - pve-storage.git/blob - PVE/Storage/LVMPlugin.pm
1 package PVE
::Storage
::LVMPlugin
;
6 use PVE
::Tools
qw(run_command trim);
7 use PVE
::Storage
::Plugin
;
8 use PVE
::JSONSchema
qw(get_standard_option);
10 use base
qw(PVE::Storage::Plugin);
12 # lvm helper functions
17 die "no device specified" if !$device;
21 my $cmd = ['/usr/bin/file', '-L', '-s', $device];
22 run_command
($cmd, outfunc
=> sub {
24 $has_label = 1 if $line =~ m/LVM2/;
27 return undef if !$has_label;
29 $cmd = ['/sbin/pvs', '--separator', ':', '--noheadings', '--units', 'k',
30 '--unbuffered', '--nosuffix', '--options',
31 'pv_name,pv_size,vg_name,pv_uuid', $device];
34 run_command
($cmd, outfunc
=> sub {
39 my ($pvname, $size, $vgname, $uuid) = split(':', $line);
41 die "found multiple pvs entries for device '$device'\n"
55 sub clear_first_sector
{
58 if (my $fh = IO
::File-
>new($dev, "w")) {
65 sub lvm_create_volume_group
{
66 my ($device, $vgname, $shared) = @_;
68 my $res = lvm_pv_info
($device);
71 return if $res->{vgname
} eq $vgname; # already created
72 die "device '$device' is already used by volume group '$res->{vgname}'\n";
75 clear_first_sector
($device); # else pvcreate fails
77 # we use --metadatasize 250k, which reseults in "pe_start = 512"
78 # so pe_start is aligned on a 128k boundary (advantage for SSDs)
79 my $cmd = ['/sbin/pvcreate', '--metadatasize', '250k', $device];
81 run_command
($cmd, errmsg
=> "pvcreate '$device' error");
83 $cmd = ['/sbin/vgcreate', $vgname, $device];
84 # push @$cmd, '-c', 'y' if $shared; # we do not use this yet
86 run_command
($cmd, errmsg
=> "vgcreate $vgname $device error");
91 my $cmd = ['/sbin/vgs', '--separator', ':', '--noheadings', '--units', 'b',
92 '--unbuffered', '--nosuffix', '--options',
93 'vg_name,vg_size,vg_free'];
97 run_command
($cmd, outfunc
=> sub {
102 my ($name, $size, $free) = split (':', $line);
104 $vgs->{$name} = { size
=> int ($size), free
=> int ($free) };
109 # just warn (vgs return error code 5 if clvmd does not run)
110 # but output is still OK (list without clustered VGs)
119 my $cmd = ['/sbin/lvs', '--separator', ':', '--noheadings', '--units', 'b',
120 '--unbuffered', '--nosuffix', '--options',
121 'vg_name,lv_name,lv_size,uuid,tags'];
123 push @$cmd, $vgname if $vgname;
126 run_command
($cmd, outfunc
=> sub {
131 my ($vg, $name, $size, $uuid, $tags) = split(':', $line);
133 return if $name !~ m/^vm-(\d+)-/;
137 foreach my $tag (split (/,/, $tags)) {
138 if ($tag =~ m/^pve-vm-(\d+)$/) {
145 if ($owner ne $nid) {
146 warn "owner mismatch name = $name, owner = $owner\n";
149 $lvs->{$vg}->{$name} = { format
=> 'raw', size
=> $size,
150 uuid
=> $uuid, tags
=> $tags,
160 PVE
::JSONSchema
::register_format
('pve-storage-vgname', \
&parse_lvm_name
);
162 my ($name, $noerr) = @_;
164 if ($name !~ m/^[a-z][a-z0-9\-\_\.]*[a-z0-9]$/i) {
165 return undef if $noerr;
166 die "lvm name '$name' contains illegal characters\n";
178 content
=> [ {images
=> 1}, { images
=> 1 }],
185 description
=> "Volume group name.",
186 type
=> 'string', format
=> 'pve-storage-vgname',
189 description
=> "Base volume. This volume is automatically activated.",
190 type
=> 'string', format
=> 'pve-volume-id',
193 description
=> "Zero-out data when removing LVs.",
201 vgname
=> { fixed
=> 1 },
202 nodes
=> { optional
=> 1 },
203 shared
=> { optional
=> 1 },
204 disable
=> { optional
=> 1 },
205 saferemove
=> { optional
=> 1 },
206 content
=> { optional
=> 1 },
207 base
=> { fixed
=> 1, optional
=> 1 },
211 # Storage implementation
214 my ($class, $volname) = @_;
216 parse_lvm_name
($volname);
218 if ($volname =~ m/^(vm-(\d+)-\S+)$/) {
219 return ('images', $1, $2);
222 die "unable to parse lvm volume name '$volname'\n";
226 my ($class, $scfg, $volname) = @_;
228 my ($vtype, $name, $vmid) = $class->parse_volname($volname);
230 my $vg = $scfg->{vgname
};
232 my $path = "/dev/$vg/$name";
234 return wantarray ?
($path, $vmid, $vtype) : $path;
238 my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_;
240 die "unsupported format '$fmt'" if $fmt ne 'raw';
242 die "illegal name '$name' - sould be 'vm-$vmid-*'\n"
243 if $name && $name !~ m/^vm-$vmid-/;
247 my $vg = $scfg->{vgname
};
249 die "no such volume gruoup '$vg'\n" if !defined ($vgs->{$vg});
251 my $free = int($vgs->{$vg}->{free
});
253 die "not enough free space ($free < $size)\n" if $free < $size;
256 my $lvs = lvm_lvs
($vg);
258 for (my $i = 1; $i < 100; $i++) {
259 my $tn = "vm-$vmid-disk-$i";
260 if (!defined ($lvs->{$vg}->{$tn})) {
267 die "unable to allocate an image name for VM $vmid in storage '$storeid'\n"
270 my $cmd = ['/sbin/lvcreate', '-aly', '--addtag', "pve-vm-$vmid", '--size', "${size}k", '--name', $name, $vg];
272 run_command
($cmd, errmsg
=> "lvcreate '$vg/pve-vm-$vmid' error");
278 my ($class, $storeid, $scfg, $volname) = @_;
280 my $vg = $scfg->{vgname
};
282 # we need to zero out LVM data for security reasons
283 # and to allow thin provisioning
285 my $zero_out_worker = sub {
286 print "zero-out data on image $volname\n";
287 my $cmd = ['dd', "if=/dev/zero", "of=/dev/$vg/del-$volname", "bs=1M"];
288 eval { run_command
($cmd, errmsg
=> "zero out failed"); };
291 $class->cluster_lock_storage($storeid, $scfg->{shared
}, undef, sub {
292 my $cmd = ['/sbin/lvremove', '-f', "$vg/del-$volname"];
293 run_command
($cmd, errmsg
=> "lvremove '$vg/del-$volname' error");
295 print "successfully removed volume $volname\n";
298 if ($scfg->{saferemove
}) {
299 # avoid long running task, so we only rename here
300 my $cmd = ['/sbin/lvrename', $vg, $volname, "del-$volname"];
301 run_command
($cmd, errmsg
=> "lvrename '$vg/$volname' error");
302 return $zero_out_worker;
304 my $tmpvg = $scfg->{vgname
};
305 my $cmd = ['/sbin/lvremove', '-f', "$tmpvg/$volname"];
306 run_command
($cmd, errmsg
=> "lvremove '$tmpvg/$volname' error");
313 my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_;
315 my $vgname = $scfg->{vgname
};
317 $cache->{lvs
} = lvm_lvs
() if !$cache->{lvs
};
321 if (my $dat = $cache->{lvs
}->{$vgname}) {
323 foreach my $volname (keys %$dat) {
325 my $owner = $dat->{$volname}->{vmid
};
327 my $volid = "$storeid:$volname";
330 my $found = grep { $_ eq $volid } @$vollist;
333 next if defined ($vmid) && ($owner ne $vmid);
336 my $info = $dat->{$volname};
337 $info->{volid
} = $volid;
347 my ($class, $storeid, $scfg, $cache) = @_;
349 $cache->{vgs
} = lvm_vgs
() if !$cache->{vgs
};
351 my $vgname = $scfg->{vgname
};
357 if (my $info = $cache->{vgs
}->{$vgname}) {
358 return ($info->{size
}, $info->{free
}, $total - $free, 1);
364 sub activate_storage
{
365 my ($class, $storeid, $scfg, $cache) = @_;
367 $cache->{vgs
} = lvm_vgs
() if !$cache->{vgs
};
369 # In LVM2, vgscans take place automatically;
370 # this is just to be sure
371 if ($cache->{vgs
} && !$cache->{vgscaned
} &&
372 !$cache->{vgs
}->{$scfg->{vgname
}}) {
373 $cache->{vgscaned
} = 1;
374 my $cmd = ['/sbin/vgscan', '--ignorelockingfailure', '--mknodes'];
375 eval { run_command
($cmd, outfunc
=> sub {}); };
379 # we do not acticate any volumes here ('vgchange -aly')
380 # instead, volumes are activate individually later
383 sub deactivate_storage
{
384 my ($class, $storeid, $scfg, $cache) = @_;
386 my $cmd = ['/sbin/vgchange', '-aln', $scfg->{vgname
}];
387 run_command
($cmd, errmsg
=> "can't deactivate VG '$scfg->{vgname}'");
390 sub activate_volume
{
391 my ($class, $storeid, $scfg, $volname, $exclusive, $cache) = @_;
393 my $path = $class->path($scfg, $volname);
395 my $lvm_activate_mode = $exclusive ?
'ey' : 'ly';
397 my $cmd = ['/sbin/lvchange', "-a$lvm_activate_mode", $path];
398 run_command
($cmd, errmsg
=> "can't activate LV '$path'");
401 sub deactivate_volume
{
402 my ($class, $storeid, $scfg, $volname, $cache) = @_;
404 my $path = $class->path($scfg, $volname);
405 return if ! -b
$path;
407 my $cmd = ['/sbin/lvchange', '-aln', $path];
408 run_command
($cmd, errmsg
=> "can't deactivate LV '$path'");
412 my ($class, $scfg, $storeid, $volname, $size, $running) = @_;
414 $size = ($size/1024/1024) . "M";
416 my $path = $class->path($scfg, $volname);
417 my $cmd = ['/sbin/lvextend', '-L', $size, $path];
418 run_command
($cmd, errmsg
=> "error resizing volume '$path'");
423 sub volume_snapshot
{
424 my ($class, $scfg, $storeid, $volname, $snap, $running) = @_;
426 die "lvm snapshot is not implemented";