]>
git.proxmox.com Git - pve-storage.git/blob - PVE/Storage/LvmThinPlugin.pm
1 package PVE
::Storage
::LvmThinPlugin
;
7 use PVE
::Tools
qw(run_command trim);
8 use PVE
::Storage
::Plugin
;
9 use PVE
::Storage
::LVMPlugin
;
10 use PVE
::JSONSchema
qw(get_standard_option);
13 # lvcreate -n ThinDataLV -L LargeSize VG
14 # lvconvert --type thin-pool VG/ThinDataLV
15 # lvcreate -n pvepool -L 20G pve
16 # lvconvert --type thin-pool pve/pvepool
18 # NOTE: volumes which were created as linked clones of another base volume
19 # are currently not tracking this relationship in their volume IDs. this is
20 # generally not a problem, as LVM thin allows deletion of such base volumes
21 # without affecting the linked clones. this leads to increased disk usage
22 # when migrating LVM-thin volumes, which is normally prevented for linked clones.
24 use base
qw(PVE::Storage::LVMPlugin);
32 content
=> [ {images
=> 1, rootdir
=> 1}, { images
=> 1, rootdir
=> 1}],
39 description
=> "LVM thin pool LV name.",
40 type
=> 'string', format
=> 'pve-storage-vgname',
47 thinpool
=> { fixed
=> 1 },
48 vgname
=> { fixed
=> 1 },
49 nodes
=> { optional
=> 1 },
50 disable
=> { optional
=> 1 },
51 content
=> { optional
=> 1 },
55 # NOTE: the fourth and fifth element of the returned array are always
56 # undef, even if the volume is a linked clone of another volume. see note
57 # at beginning of file.
59 my ($class, $volname) = @_;
61 PVE
::Storage
::Plugin
::parse_lvm_name
($volname);
63 if ($volname =~ m/^((vm|base)-(\d+)-\S+)$/) {
64 return ('images', $1, $3, undef, undef, $2 eq 'base', 'raw');
67 die "unable to parse lvm volume name '$volname'\n";
71 my ($class, $scfg, $volname, $snapname) = @_;
73 my ($vtype, $name, $vmid) = $class->parse_volname($volname);
75 my $vg = $scfg->{vgname
};
77 my $path = defined($snapname) ?
"/dev/$vg/snap_${name}_$snapname": "/dev/$vg/$name";
79 return wantarray ?
($path, $vmid, $vtype) : $path;
83 my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_;
85 die "unsupported format '$fmt'" if $fmt ne 'raw';
87 die "illegal name '$name' - sould be 'vm-$vmid-*'\n"
88 if $name && $name !~ m/^vm-$vmid-/;
90 my $vgs = PVE
::Storage
::LVMPlugin
::lvm_vgs
();
92 my $vg = $scfg->{vgname
};
94 die "no such volume group '$vg'\n" if !defined ($vgs->{$vg});
96 my $lvs = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
($vg);
98 $name = PVE
::Storage
::LVMPlugin
::lvm_find_free_diskname
($lvs, $vg, $storeid, $vmid)
101 my $cmd = ['/sbin/lvcreate', '-aly', '-V', "${size}k", '--name', $name,
102 '--thinpool', "$vg/$scfg->{thinpool}" ];
104 run_command
($cmd, errmsg
=> "lvcreate '$vg/$name' error");
110 my ($class, $storeid, $scfg, $volname, $isBase) = @_;
112 my $vg = $scfg->{vgname
};
114 my $lvs = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
($vg);
116 if (my $dat = $lvs->{$scfg->{vgname
}}) {
118 # remove all volume snapshots first
119 foreach my $lv (keys %$dat) {
120 next if $lv !~ m/^snap_${volname}_(\w+)$/;
121 my $cmd = ['/sbin/lvremove', '-f', "$vg/$lv"];
122 run_command
($cmd, errmsg
=> "lvremove snapshot '$vg/$lv' error");
125 # finally remove original (if exists)
126 if ($dat->{$volname}) {
127 my $cmd = ['/sbin/lvremove', '-f', "$vg/$volname"];
128 run_command
($cmd, errmsg
=> "lvremove '$vg/$volname' error");
136 my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_;
138 my $vgname = $scfg->{vgname
};
140 $cache->{lvs
} = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
() if !$cache->{lvs
};
144 if (my $dat = $cache->{lvs
}->{$vgname}) {
146 foreach my $volname (keys %$dat) {
148 next if $volname !~ m/^(vm|base)-(\d+)-/;
151 my $info = $dat->{$volname};
153 next if $info->{lv_type
} ne 'V';
155 next if $info->{pool_lv
} ne $scfg->{thinpool
};
157 my $volid = "$storeid:$volname";
160 my $found = grep { $_ eq $volid } @$vollist;
163 next if defined($vmid) && ($owner ne $vmid);
167 volid
=> $volid, format
=> 'raw', size
=> $info->{lv_size
}, vmid
=> $owner,
178 my $lvs = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
($vg);
181 foreach my $lvname (keys %{$lvs->{$vg}}) {
182 next if $lvs->{$vg}->{$lvname}->{lv_type
} ne 't';
183 push @$thinpools, { lv
=> $lvname };
190 my ($class, $storeid, $scfg, $cache) = @_;
192 my $lvname = "$scfg->{vgname}/$scfg->{thinpool}";
194 $cache->{lvs
} = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
() if !$cache->{lvs
};
196 my $lvs = $cache->{lvs
};
198 return undef if !$lvs->{$scfg->{vgname
}};
200 my $info = $lvs->{$scfg->{vgname
}}->{$scfg->{thinpool
}};
202 return undef if !$info;
204 return undef if $info->{lv_type
} ne 't';
206 return ($info->{lv_size
}, $info->{lv_size
} - $info->{used
}, $info->{used
}, 1) if $info->{lv_size
};
211 sub activate_volume
{
212 my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
214 my $vg = $scfg->{vgname
};
216 # only snapshot volumes needs activation
218 my $snapvol = "snap_${volname}_$snapname";
219 my $cmd = ['/sbin/lvchange', '-ay', '-K', "$vg/$snapvol"];
220 run_command
($cmd, errmsg
=> "activate_volume '$vg/$snapvol' error");
221 } elsif ($volname =~ /^base-/) {
222 my $cmd = ['/sbin/lvchange', '-ay', '-K', "$vg/$volname"];
223 run_command
($cmd, errmsg
=> "activate_volume '$vg/$volname' error");
225 # other volumes are active by default
229 sub deactivate_volume
{
230 my ($class, $storeid, $scfg, $volname, $snapname, $cache) = @_;
232 my $vg = $scfg->{vgname
};
234 # we only deactivate snapshot volumes
236 my $snapvol = "snap_${volname}_$snapname";
237 my $cmd = ['/sbin/lvchange', '-an', "$vg/$snapvol"];
238 run_command
($cmd, errmsg
=> "deactivate_volume '$vg/$snapvol' error");
239 } elsif ($volname =~ /^base-/) {
240 my $cmd = ['/sbin/lvchange', '-an', "$vg/$volname"];
241 run_command
($cmd, errmsg
=> "deactivate_volume '$vg/$volname' error");
243 # other volumes are kept active
248 my ($class, $scfg, $storeid, $volname, $vmid, $snap) = @_;
250 my $vg = $scfg->{vgname
};
255 $lv = "$vg/snap_${volname}_$snap";
257 my ($vtype, undef, undef, undef, undef, $isBase, $format) =
258 $class->parse_volname($volname);
260 die "clone_image only works on base images\n" if !$isBase;
262 $lv = "$vg/$volname";
265 my $lvs = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
($vg);
267 my $name = PVE
::Storage
::LVMPlugin
::lvm_find_free_diskname
($lvs, $vg, $storeid, $vmid);
269 my $cmd = ['/sbin/lvcreate', '-n', $name, '-prw', '-kn', '-s', $lv];
270 run_command
($cmd, errmsg
=> "clone image '$lv' error");
276 my ($class, $storeid, $scfg, $volname) = @_;
278 my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) =
279 $class->parse_volname($volname);
281 die "create_base not possible with base image\n" if $isBase;
283 my $vg = $scfg->{vgname
};
284 my $lvs = PVE
::Storage
::LVMPlugin
::lvm_list_volumes
($vg);
286 if (my $dat = $lvs->{$vg}) {
287 # to avoid confusion, reject if we find volume snapshots
288 foreach my $lv (keys %$dat) {
289 die "unable to create base volume - found snaphost '$lv'\n"
290 if $lv =~ m/^snap_${volname}_(\w+)$/;
295 $newname =~ s/^vm-/base-/;
297 my $cmd = ['/sbin/lvrename', $vg, $volname, $newname];
298 run_command
($cmd, errmsg
=> "lvrename '$vg/$volname' => '$vg/$newname' error");
300 # set inactive, read-only and activationskip flags
301 $cmd = ['/sbin/lvchange', '-an', '-pr', '-ky', "$vg/$newname"];
302 eval { run_command
($cmd); };
305 my $newvolname = $newname;
310 # sub volume_resize {} reuse code from parent class
312 sub volume_snapshot
{
313 my ($class, $scfg, $storeid, $volname, $snap) = @_;
315 my $vg = $scfg->{vgname
};
316 my $snapvol = "snap_${volname}_$snap";
318 my $cmd = ['/sbin/lvcreate', '-n', $snapvol, '-pr', '-s', "$vg/$volname"];
319 run_command
($cmd, errmsg
=> "lvcreate snapshot '$vg/$snapvol' error");
323 sub volume_snapshot_rollback
{
324 my ($class, $scfg, $storeid, $volname, $snap) = @_;
326 my $vg = $scfg->{vgname
};
327 my $snapvol = "snap_${volname}_$snap";
329 my $cmd = ['/sbin/lvremove', '-f', "$vg/$volname"];
330 run_command
($cmd, errmsg
=> "lvremove '$vg/$volname' error");
332 $cmd = ['/sbin/lvcreate', '-kn', '-n', $volname, '-s', "$vg/$snapvol"];
333 run_command
($cmd, errmsg
=> "lvm rollback '$vg/$snapvol' error");
336 sub volume_snapshot_delete
{
337 my ($class, $scfg, $storeid, $volname, $snap) = @_;
339 my $vg = $scfg->{vgname
};
340 my $snapvol = "snap_${volname}_$snap";
342 my $cmd = ['/sbin/lvremove', '-f', "$vg/$snapvol"];
343 run_command
($cmd, errmsg
=> "lvremove snapshot '$vg/$snapvol' error");
346 sub volume_has_feature
{
347 my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_;
350 snapshot
=> { current
=> 1 },
351 clone
=> { base
=> 1, snap
=> 1},
352 template
=> { current
=> 1},
353 copy
=> { base
=> 1, current
=> 1, snap
=> 1},
354 sparseinit
=> { base
=> 1, current
=> 1},
357 my ($vtype, $name, $vmid, $basename, $basevmid, $isBase) =
358 $class->parse_volname($volname);
364 $key = $isBase ?
'base' : 'current';
366 return 1 if $features->{$feature}->{$key};