]>
git.proxmox.com Git - pve-storage.git/blob - PVE/Storage/LvmThinPlugin.pm
1 package PVE
::Storage
::LvmThinPlugin
;
8 use PVE
::Tools
qw(run_command trim);
9 use PVE
::Storage
::Plugin
;
10 use PVE
::Storage
::LVMPlugin
;
11 use PVE
::JSONSchema
qw(get_standard_option);
14 # lvcreate -n ThinDataLV -L LargeSize VG
15 # lvconvert --type thin-pool VG/ThinDataLV
16 # lvcreate -n pvepool -L 20G pve
17 # lvconvert --type thin-pool pve/pvepool
19 # NOTE: volumes which were created as linked clones of another base volume
20 # are currently not tracking this relationship in their volume IDs. this is
21 # generally not a problem, as LVM thin allows deletion of such base volumes
22 # without affecting the linked clones. this leads to increased disk usage
23 # when migrating LVM-thin volumes, which is normally prevented for linked clones.
25 use base
qw(PVE::Storage::LVMPlugin);
33 content
=> [ {images
=> 1, rootdir
=> 1}, { images
=> 1, rootdir
=> 1}],
40 description
=> "LVM thin pool LV name.",
41 type
=> 'string', format
=> 'pve-storage-vgname',
48 thinpool
=> { fixed
=> 1 },
49 vgname
=> { fixed
=> 1 },
50 nodes
=> { optional
=> 1 },
51 disable
=> { optional
=> 1 },
52 content
=> { optional
=> 1 },
53 bwlimit
=> { optional
=> 1 },
57 # NOTE: the fourth and fifth element of the returned array are always
58 # undef, even if the volume is a linked clone of another volume. see note
59 # at beginning of file.
61 my ($class, $volname) = @_;
63 PVE
::Storage
::Plugin
::parse_lvm_name
($volname);
65 if ($volname =~ m/^((vm|base)-(\d+)-\S+)$/) {
66 return ('images', $1, $3, undef, undef, $2 eq 'base', 'raw');
69 die "unable to parse lvm volume name '$volname'\n";
73 my ($class, $scfg, $volname, $snapname) = @_;
75 my ($vtype, $name, $vmid) = $class->parse_volname($volname);
77 my $vg = $scfg->{vgname
};
79 my $path = defined($snapname) ?
"/dev/$vg/snap_${name}_$snapname": "/dev/$vg/$name";
81 return wantarray ?
($path, $vmid, $vtype) : $path;
85 my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_;
87 die "unsupported format '$fmt'" if $fmt ne 'raw';
89 die "illegal name '$name' - sould be 'vm-$vmid-*'\n"
90 if $name && $name !~ m/^vm-$vmid-/;
92 my $vgs = PVE
::Storage
::LVMPlugin
::lvm_vgs
();
94 my $vg = $scfg->{vgname
};
96 die "no such volume group '$vg'\n" if !defined ($vgs->{$vg});
98 my $lvs = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
($vg);
100 $name = PVE
::Storage
::LVMPlugin
::lvm_find_free_diskname
($lvs, $vg, $storeid, $vmid)
103 my $cmd = ['/sbin/lvcreate', '-aly', '-V', "${size}k", '--name', $name,
104 '--thinpool', "$vg/$scfg->{thinpool}" ];
106 run_command
($cmd, errmsg
=> "lvcreate '$vg/$name' error");
112 my ($class, $storeid, $scfg, $volname, $isBase) = @_;
114 my $vg = $scfg->{vgname
};
116 my $lvs = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
($vg);
118 if (my $dat = $lvs->{$scfg->{vgname
}}) {
120 # remove all volume snapshots first
121 foreach my $lv (keys %$dat) {
122 next if $lv !~ m/^snap_${volname}_(\w+)$/;
123 my $cmd = ['/sbin/lvremove', '-f', "$vg/$lv"];
124 run_command
($cmd, errmsg
=> "lvremove snapshot '$vg/$lv' error");
127 # finally remove original (if exists)
128 if ($dat->{$volname}) {
129 my $cmd = ['/sbin/lvremove', '-f', "$vg/$volname"];
130 run_command
($cmd, errmsg
=> "lvremove '$vg/$volname' error");
138 my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_;
140 my $vgname = $scfg->{vgname
};
142 $cache->{lvs
} = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
() if !$cache->{lvs
};
146 if (my $dat = $cache->{lvs
}->{$vgname}) {
148 foreach my $volname (keys %$dat) {
150 next if $volname !~ m/^(vm|base)-(\d+)-/;
153 my $info = $dat->{$volname};
155 next if $info->{lv_type
} ne 'V';
157 next if $info->{pool_lv
} ne $scfg->{thinpool
};
159 my $volid = "$storeid:$volname";
162 my $found = grep { $_ eq $volid } @$vollist;
165 next if defined($vmid) && ($owner ne $vmid);
169 volid
=> $volid, format
=> 'raw', size
=> $info->{lv_size
}, vmid
=> $owner,
180 my $lvs = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
($vg);
183 foreach my $vg (keys %$lvs) {
184 foreach my $lvname (keys %{$lvs->{$vg}}) {
185 next if $lvs->{$vg}->{$lvname}->{lv_type
} ne 't';
186 my $lv = $lvs->{$vg}->{$lvname};
188 push @$thinpools, $lv;
196 my ($class, $storeid, $scfg, $cache) = @_;
198 my $lvname = "$scfg->{vgname}/$scfg->{thinpool}";
200 $cache->{lvs
} = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
() if !$cache->{lvs
};
202 my $lvs = $cache->{lvs
};
204 return undef if !$lvs->{$scfg->{vgname
}};
206 my $info = $lvs->{$scfg->{vgname
}}->{$scfg->{thinpool
}};
208 return undef if !$info;
210 return undef if $info->{lv_type
} ne 't';
212 return ($info->{lv_size
}, $info->{lv_size
} - $info->{used
}, $info->{used
}, 1) if $info->{lv_size
};
217 sub activate_volume
{
218 my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
220 my $vg = $scfg->{vgname
};
222 # only snapshot volumes needs activation
224 my $snapvol = "snap_${volname}_$snapname";
225 my $cmd = ['/sbin/lvchange', '-ay', '-K', "$vg/$snapvol"];
226 run_command
($cmd, errmsg
=> "activate_volume '$vg/$snapvol' error");
227 } elsif ($volname =~ /^base-/) {
228 my $cmd = ['/sbin/lvchange', '-ay', '-K', "$vg/$volname"];
229 run_command
($cmd, errmsg
=> "activate_volume '$vg/$volname' error");
231 # other volumes are active by default
235 sub deactivate_volume
{
236 my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
238 my $vg = $scfg->{vgname
};
240 # we only deactivate snapshot volumes
242 my $snapvol = "snap_${volname}_$snapname";
243 my $cmd = ['/sbin/lvchange', '-an', "$vg/$snapvol"];
244 run_command
($cmd, errmsg
=> "deactivate_volume '$vg/$snapvol' error");
245 } elsif ($volname =~ /^base-/) {
246 my $cmd = ['/sbin/lvchange', '-an', "$vg/$volname"];
247 run_command
($cmd, errmsg
=> "deactivate_volume '$vg/$volname' error");
249 # other volumes are kept active
254 my ($class, $scfg, $storeid, $volname, $vmid, $snap) = @_;
256 my $vg = $scfg->{vgname
};
261 $lv = "$vg/snap_${volname}_$snap";
263 my ($vtype, undef, undef, undef, undef, $isBase, $format) =
264 $class->parse_volname($volname);
266 die "clone_image only works on base images\n" if !$isBase;
268 $lv = "$vg/$volname";
271 my $lvs = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
($vg);
273 my $name = PVE
::Storage
::LVMPlugin
::lvm_find_free_diskname
($lvs, $vg, $storeid, $vmid);
275 my $cmd = ['/sbin/lvcreate', '-n', $name, '-prw', '-kn', '-s', $lv];
276 run_command
($cmd, errmsg
=> "clone image '$lv' error");
282 my ($class, $storeid, $scfg, $volname) = @_;
284 my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) =
285 $class->parse_volname($volname);
287 die "create_base not possible with base image\n" if $isBase;
289 my $vg = $scfg->{vgname
};
290 my $lvs = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
($vg);
292 if (my $dat = $lvs->{$vg}) {
293 # to avoid confusion, reject if we find volume snapshots
294 foreach my $lv (keys %$dat) {
295 die "unable to create base volume - found snaphost '$lv'\n"
296 if $lv =~ m/^snap_${volname}_(\w+)$/;
301 $newname =~ s/^vm-/base-/;
303 my $cmd = ['/sbin/lvrename', $vg, $volname, $newname];
304 run_command
($cmd, errmsg
=> "lvrename '$vg/$volname' => '$vg/$newname' error");
306 # set inactive, read-only and activationskip flags
307 $cmd = ['/sbin/lvchange', '-an', '-pr', '-ky', "$vg/$newname"];
308 eval { run_command
($cmd); };
311 my $newvolname = $newname;
316 # sub volume_resize {} reuse code from parent class
318 sub volume_snapshot
{
319 my ($class, $scfg, $storeid, $volname, $snap) = @_;
321 my $vg = $scfg->{vgname
};
322 my $snapvol = "snap_${volname}_$snap";
324 my $cmd = ['/sbin/lvcreate', '-n', $snapvol, '-pr', '-s', "$vg/$volname"];
325 run_command
($cmd, errmsg
=> "lvcreate snapshot '$vg/$snapvol' error");
329 sub volume_snapshot_rollback
{
330 my ($class, $scfg, $storeid, $volname, $snap) = @_;
332 my $vg = $scfg->{vgname
};
333 my $snapvol = "snap_${volname}_$snap";
335 my $cmd = ['/sbin/lvremove', '-f', "$vg/$volname"];
336 run_command
($cmd, errmsg
=> "lvremove '$vg/$volname' error");
338 $cmd = ['/sbin/lvcreate', '-kn', '-n', $volname, '-s', "$vg/$snapvol"];
339 run_command
($cmd, errmsg
=> "lvm rollback '$vg/$snapvol' error");
342 sub volume_snapshot_delete
{
343 my ($class, $scfg, $storeid, $volname, $snap) = @_;
345 my $vg = $scfg->{vgname
};
346 my $snapvol = "snap_${volname}_$snap";
348 my $cmd = ['/sbin/lvremove', '-f', "$vg/$snapvol"];
349 run_command
($cmd, errmsg
=> "lvremove snapshot '$vg/$snapvol' error");
352 sub volume_has_feature
{
353 my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_;
356 snapshot
=> { current
=> 1 },
357 clone
=> { base
=> 1, snap
=> 1},
358 template
=> { current
=> 1},
359 copy
=> { base
=> 1, current
=> 1, snap
=> 1},
360 sparseinit
=> { base
=> 1, current
=> 1},
363 my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) =
364 $class->parse_volname($volname);
370 $key = $isBase ?
'base' : 'current';
372 return 1 if $features->{$feature}->{$key};