+++ /dev/null
-package PVE::Storage::LVMPlugin;
-
-use strict;
-use warnings;
-use IO::File;
-use PVE::Tools qw(run_command trim);
-use PVE::Storage::Plugin;
-use PVE::JSONSchema qw(get_standard_option);
-
-use base qw(PVE::Storage::Plugin);
-
-# lvm helper functions
-
-sub lvm_pv_info {
- my ($device) = @_;
-
- die "no device specified" if !$device;
-
- my $has_label = 0;
-
- my $cmd = ['/usr/bin/file', '-L', '-s', $device];
- run_command($cmd, outfunc => sub {
- my $line = shift;
- $has_label = 1 if $line =~ m/LVM2/;
- });
-
- return undef if !$has_label;
-
- $cmd = ['/sbin/pvs', '--separator', ':', '--noheadings', '--units', 'k',
- '--unbuffered', '--nosuffix', '--options',
- 'pv_name,pv_size,vg_name,pv_uuid', $device];
-
- my $pvinfo;
- run_command($cmd, outfunc => sub {
- my $line = shift;
-
- $line = trim($line);
-
- my ($pvname, $size, $vgname, $uuid) = split(':', $line);
-
- die "found multiple pvs entries for device '$device'\n"
- if $pvinfo;
-
- $pvinfo = {
- pvname => $pvname,
- size => $size,
- vgname => $vgname,
- uuid => $uuid,
- };
- });
-
- return $pvinfo;
-}
-
-sub clear_first_sector {
- my ($dev) = shift;
-
- if (my $fh = IO::File->new($dev, "w")) {
- my $buf = 0 x 512;
- syswrite $fh, $buf;
- $fh->close();
- }
-}
-
-sub lvm_create_volume_group {
- my ($device, $vgname, $shared) = @_;
-
- my $res = lvm_pv_info($device);
-
- if ($res->{vgname}) {
- return if $res->{vgname} eq $vgname; # already created
- die "device '$device' is already used by volume group '$res->{vgname}'\n";
- }
-
- clear_first_sector($device); # else pvcreate fails
-
- # we use --metadatasize 250k, which reseults in "pe_start = 512"
- # so pe_start is aligned on a 128k boundary (advantage for SSDs)
- my $cmd = ['/sbin/pvcreate', '--metadatasize', '250k', $device];
-
- run_command($cmd, errmsg => "pvcreate '$device' error");
-
- $cmd = ['/sbin/vgcreate', $vgname, $device];
- # push @$cmd, '-c', 'y' if $shared; # we do not use this yet
-
- run_command($cmd, errmsg => "vgcreate $vgname $device error");
-}
-
-sub lvm_vgs {
-
- my $cmd = ['/sbin/vgs', '--separator', ':', '--noheadings', '--units', 'b',
- '--unbuffered', '--nosuffix', '--options',
- 'vg_name,vg_size,vg_free'];
-
- my $vgs = {};
- eval {
- run_command($cmd, outfunc => sub {
- my $line = shift;
-
- $line = trim($line);
-
- my ($name, $size, $free) = split (':', $line);
-
- $vgs->{$name} = { size => int ($size), free => int ($free) };
- });
- };
- my $err = $@;
-
- # just warn (vgs return error code 5 if clvmd does not run)
- # but output is still OK (list without clustered VGs)
- warn $err if $err;
-
- return $vgs;
-}
-
-sub lvm_lvs {
- my ($vgname) = @_;
-
- my $cmd = ['/sbin/lvs', '--separator', ':', '--noheadings', '--units', 'b',
- '--unbuffered', '--nosuffix', '--options',
- 'vg_name,lv_name,lv_size,uuid,tags'];
-
- push @$cmd, $vgname if $vgname;
-
- my $lvs = {};
- run_command($cmd, outfunc => sub {
- my $line = shift;
-
- $line = trim($line);
-
- my ($vg, $name, $size, $uuid, $tags) = split(':', $line);
-
- return if $name !~ m/^vm-(\d+)-/;
- my $nid = $1;
-
- my $owner;
- foreach my $tag (split (/,/, $tags)) {
- if ($tag =~ m/^pve-vm-(\d+)$/) {
- $owner = $1;
- last;
- }
- }
-
- if ($owner) {
- if ($owner ne $nid) {
- warn "owner mismatch name = $name, owner = $owner\n";
- }
-
- $lvs->{$vg}->{$name} = { format => 'raw', size => $size,
- uuid => $uuid, tags => $tags,
- vmid => $owner };
- }
- });
-
- return $lvs;
-}
-
-# Configuration
-
-PVE::JSONSchema::register_format('pve-storage-vgname', \&parse_lvm_name);
-sub parse_lvm_name {
- my ($name, $noerr) = @_;
-
- if ($name !~ m/^[a-z][a-z0-9\-\_\.]*[a-z0-9]$/i) {
- return undef if $noerr;
- die "lvm name '$name' contains illegal characters\n";
- }
-
- return $name;
-}
-
-sub type {
- return 'lvm';
-}
-
-sub plugindata {
- return {
- content => [ {images => 1}, { images => 1 }],
- };
-}
-
-sub properties {
- return {
- vgname => {
- description => "Volume group name.",
- type => 'string', format => 'pve-storage-vgname',
- },
- base => {
- description => "Base volume. This volume is automatically activated.",
- type => 'string', format => 'pve-volume-id',
- },
- saferemove => {
- description => "Zero-out data when removing LVs.",
- type => 'boolean',
- },
- };
-}
-
-sub options {
- return {
- vgname => { fixed => 1 },
- nodes => { optional => 1 },
- shared => { optional => 1 },
- disable => { optional => 1 },
- saferemove => { optional => 1 },
- content => { optional => 1 },
- base => { fixed => 1, optional => 1 },
- };
-}
-
-# Storage implementation
-
-sub parse_volname {
- my ($class, $volname) = @_;
-
- parse_lvm_name($volname);
-
- if ($volname =~ m/^(vm-(\d+)-\S+)$/) {
- return ('images', $1, $2);
- }
-
- die "unable to parse lvm volume name '$volname'\n";
-}
-
-sub path {
- my ($class, $scfg, $volname) = @_;
-
- my ($vtype, $name, $vmid) = $class->parse_volname($volname);
-
- my $vg = $scfg->{vgname};
-
- my $path = "/dev/$vg/$name";
-
- return wantarray ? ($path, $vmid, $vtype) : $path;
-}
-
-sub create_base {
- my ($class, $storeid, $scfg, $volname) = @_;
-
- die "can't create base images in lvm storage\n";
-}
-
-sub clone_image {
- my ($class, $scfg, $storeid, $volname, $vmid) = @_;
-
- die "can't clone images in lvm storage\n";
-}
-
-sub alloc_image {
- my ($class, $storeid, $scfg, $vmid, $fmt, $name, $size) = @_;
-
- die "unsupported format '$fmt'" if $fmt ne 'raw';
-
- die "illegal name '$name' - sould be 'vm-$vmid-*'\n"
- if $name && $name !~ m/^vm-$vmid-/;
-
- my $vgs = lvm_vgs();
-
- my $vg = $scfg->{vgname};
-
- die "no such volume group '$vg'\n" if !defined ($vgs->{$vg});
-
- my $free = int($vgs->{$vg}->{free});
-
- die "not enough free space ($free < $size)\n" if $free < $size;
-
- if (!$name) {
- my $lvs = lvm_lvs($vg);
-
- for (my $i = 1; $i < 100; $i++) {
- my $tn = "vm-$vmid-disk-$i";
- if (!defined ($lvs->{$vg}->{$tn})) {
- $name = $tn;
- last;
- }
- }
- }
-
- die "unable to allocate an image name for VM $vmid in storage '$storeid'\n"
- if !$name;
-
- my $cmd = ['/sbin/lvcreate', '-aly', '--addtag', "pve-vm-$vmid", '--size', "${size}k", '--name', $name, $vg];
-
- run_command($cmd, errmsg => "lvcreate '$vg/pve-vm-$vmid' error");
-
- return $name;
-}
-
-sub free_image {
- my ($class, $storeid, $scfg, $volname) = @_;
-
- my $vg = $scfg->{vgname};
-
- # we need to zero out LVM data for security reasons
- # and to allow thin provisioning
-
- my $zero_out_worker = sub {
- print "zero-out data on image $volname\n";
- my $cmd = ['dd', "if=/dev/zero", "of=/dev/$vg/del-$volname", "bs=1M"];
- eval { run_command($cmd, errmsg => "zero out failed"); };
- warn $@ if $@;
-
- $class->cluster_lock_storage($storeid, $scfg->{shared}, undef, sub {
- my $cmd = ['/sbin/lvremove', '-f', "$vg/del-$volname"];
- run_command($cmd, errmsg => "lvremove '$vg/del-$volname' error");
- });
- print "successfully removed volume $volname\n";
- };
-
- if ($scfg->{saferemove}) {
- # avoid long running task, so we only rename here
- my $cmd = ['/sbin/lvrename', $vg, $volname, "del-$volname"];
- run_command($cmd, errmsg => "lvrename '$vg/$volname' error");
- return $zero_out_worker;
- } else {
- my $tmpvg = $scfg->{vgname};
- my $cmd = ['/sbin/lvremove', '-f', "$tmpvg/$volname"];
- run_command($cmd, errmsg => "lvremove '$tmpvg/$volname' error");
- }
-
- return undef;
-}
-
-sub list_images {
- my ($class, $storeid, $scfg, $vmid, $vollist, $cache) = @_;
-
- my $vgname = $scfg->{vgname};
-
- $cache->{lvs} = lvm_lvs() if !$cache->{lvs};
-
- my $res = [];
-
- if (my $dat = $cache->{lvs}->{$vgname}) {
-
- foreach my $volname (keys %$dat) {
-
- my $owner = $dat->{$volname}->{vmid};
-
- my $volid = "$storeid:$volname";
-
- if ($vollist) {
- my $found = grep { $_ eq $volid } @$vollist;
- next if !$found;
- } else {
- next if defined ($vmid) && ($owner ne $vmid);
- }
-
- my $info = $dat->{$volname};
- $info->{volid} = $volid;
-
- push @$res, $info;
- }
- }
-
- return $res;
-}
-
-sub status {
- my ($class, $storeid, $scfg, $cache) = @_;
-
- $cache->{vgs} = lvm_vgs() if !$cache->{vgs};
-
- my $vgname = $scfg->{vgname};
-
- my $total = 0;
- my $free = 0;
- my $used = 0;
-
- if (my $info = $cache->{vgs}->{$vgname}) {
- return ($info->{size}, $info->{free}, $total - $free, 1);
- }
-
- return undef;
-}
-
-sub activate_storage {
- my ($class, $storeid, $scfg, $cache) = @_;
-
- $cache->{vgs} = lvm_vgs() if !$cache->{vgs};
-
- # In LVM2, vgscans take place automatically;
- # this is just to be sure
- if ($cache->{vgs} && !$cache->{vgscaned} &&
- !$cache->{vgs}->{$scfg->{vgname}}) {
- $cache->{vgscaned} = 1;
- my $cmd = ['/sbin/vgscan', '--ignorelockingfailure', '--mknodes'];
- eval { run_command($cmd, outfunc => sub {}); };
- warn $@ if $@;
- }
-
- # we do not acticate any volumes here ('vgchange -aly')
- # instead, volumes are activate individually later
-}
-
-sub deactivate_storage {
- my ($class, $storeid, $scfg, $cache) = @_;
-
- my $cmd = ['/sbin/vgchange', '-aln', $scfg->{vgname}];
- run_command($cmd, errmsg => "can't deactivate VG '$scfg->{vgname}'");
-}
-
-sub activate_volume {
- my ($class, $storeid, $scfg, $volname, $exclusive, $cache) = @_;
-
- my $path = $class->path($scfg, $volname);
-
- my $lvm_activate_mode = $exclusive ? 'ey' : 'ly';
-
- my $cmd = ['/sbin/lvchange', "-a$lvm_activate_mode", $path];
- run_command($cmd, errmsg => "can't activate LV '$path'");
-}
-
-sub deactivate_volume {
- my ($class, $storeid, $scfg, $volname, $cache) = @_;
-
- my $path = $class->path($scfg, $volname);
- return if ! -b $path;
-
- my $cmd = ['/sbin/lvchange', '-aln', $path];
- run_command($cmd, errmsg => "can't deactivate LV '$path'");
-}
-
-sub volume_resize {
- my ($class, $scfg, $storeid, $volname, $size, $running) = @_;
-
- $size = ($size/1024/1024) . "M";
-
- my $path = $class->path($scfg, $volname);
- my $cmd = ['/sbin/lvextend', '-L', $size, $path];
- run_command($cmd, errmsg => "error resizing volume '$path'");
-
- return 1;
-}
-
-sub volume_snapshot {
- my ($class, $scfg, $storeid, $volname, $snap, $running) = @_;
-
- die "lvm snapshot is not implemented";
-}
-
-sub volume_snapshot_rollback {
- my ($class, $scfg, $storeid, $volname, $snap) = @_;
-
- die "lvm snapshot rollback is not implemented";
-}
-
-sub volume_snapshot_delete {
- my ($class, $scfg, $storeid, $volname, $snap) = @_;
-
- die "lvm snapshot delete is not implemented";
-}
-
-sub volume_has_feature {
- my ($class, $scfg, $feature, $storeid, $volname, $snapname, $running) = @_;
-
- return undef;
-}
-
-1;
projects / pve-storage.git / blobdiff