From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id 4772F9B26A for ; Tue, 17 Oct 2023 14:38:47 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 1FD70331EB for ; Tue, 17 Oct 2023 14:38:47 +0200 (CEST) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [94.136.29.106]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS for ; Tue, 17 Oct 2023 14:38:46 +0200 (CEST) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id C4EFF41B33 for ; Tue, 17 Oct 2023 14:38:45 +0200 (CEST) From: Christian Ebner To: pve-devel@lists.proxmox.com Date: Tue, 17 Oct 2023 14:38:27 +0200 Message-Id: <20231017123827.313014-1-c.ebner@proxmox.com> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL 0.028 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment PROLO_LEO2 0.1 Meta Catches all Leo drug variations so far SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [create.pm, lxc.pm] Subject: [pve-devel] [RFC pve-container] backup: do not delete not backed-up mps on restore X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Oct 2023 12:38:47 -0000 The current behaviour of the restore is to recreate all backed up mountpoints and remove all previous ones, causing potential data loss on restore when the mountpoint was not included in the backup and the user not aware of this behaviour. By checking the mountpoint configuration from the backup, only recreate the disks which are included in the backup and add them as mountpoints. Leave all other mountpoints untouched and attach them as unused disks as final step of the restore. To facilitate selective restore from PBS backups, split the currently single root pxar archive into a pxar archive for each individual mountpoint, while remaining backwards compatible. Signed-off-by: Christian Ebner --- I'm sending this as RFC since backwards compatibility for restore still suffers from the fact, that mountpoints are now expected to have their corresponding pxar archive for PBS backups, all previous backups however do not follow this scheme. For now, this is handled by treating restore errors of these archives as soft errors, meaning restore will continue. This is not ideal and I am very much open for suggestions on how this might be handled better. src/PVE/API2/LXC.pm | 26 ++++++++++++---- src/PVE/LXC/Create.pm | 72 +++++++++++++++++++++++++++++++++++-------- src/PVE/VZDump/LXC.pm | 10 +++--- 3 files changed, 85 insertions(+), 23 deletions(-) diff --git a/src/PVE/API2/LXC.pm b/src/PVE/API2/LXC.pm index 28d14de..3c7b22d 100644 --- a/src/PVE/API2/LXC.pm +++ b/src/PVE/API2/LXC.pm @@ -381,8 +381,10 @@ __PACKAGE__->register_method({ my $vollist = []; eval { my $orig_mp_param; # only used if $restore + my $clear_mps; if ($restore) { die "can't overwrite running container\n" if PVE::LXC::check_running($vmid); + if ($archive ne '-') { my $orig_conf; print "recovering backed-up configuration from '$archive'\n"; @@ -424,6 +426,14 @@ __PACKAGE__->register_method({ if !defined($mp_param->{rootfs}); PVE::LXC::Config->foreach_volume($mp_param, sub { my ($ms, $mountpoint) = @_; + if ($ms eq 'rootfs' || $mountpoint->{backup}) { + # backup conf contains the mp, clear for retsore + $clear_mps->{$ms} = $mountpoint; + } else { + # do not add as mp, will be attach as unused at the end + delete $mp_param->{$ms}; + return; + } my $type = $mountpoint->{type}; if ($type eq 'volume') { die "unable to detect disk size - please specify $ms (size)\n" @@ -459,18 +469,19 @@ __PACKAGE__->register_method({ $vollist = PVE::LXC::create_disks($storage_cfg, $vmid, $mp_param, $conf); - # we always have the 'create' lock so check for more than 1 entry - if (scalar(keys %$old_conf) > 1) { - # destroy old container volumes - PVE::LXC::destroy_lxc_container($storage_cfg, $vmid, $old_conf, { lock => 'create' }); - } + # Delete old mountpoints which are restored from backup. + PVE::LXC::Config->foreach_volume($old_conf, sub { + my ($name, $mountpoint, undef) = @_; + return if !defined($clear_mps->{$name}); + PVE::LXC::delete_mountpoint_volume($storage_cfg, $vmid, $mountpoint->{volume}); + }); eval { my $rootdir = PVE::LXC::mount_all($vmid, $storage_cfg, $conf, 1); $bwlimit = PVE::Storage::get_bandwidth_limit('restore', [keys %used_storages], $bwlimit); print "restoring '$archive' now..\n" if $restore && $archive ne '-'; - PVE::LXC::Create::restore_archive($storage_cfg, $archive, $rootdir, $conf, $ignore_unpack_errors, $bwlimit); + PVE::LXC::Create::restore_archive($storage_cfg, $archive, $rootdir, $conf, $ignore_unpack_errors, $bwlimit, $orig_mp_param); if ($restore) { print "merging backed-up and given configuration..\n"; @@ -501,6 +512,9 @@ __PACKAGE__->register_method({ $conf->{template} = 1; } PVE::LXC::Config->write_config($vmid, $conf); + + # Attach all additionally found mountpoints as unused disks. + PVE::LXC::rescan($vmid, 1, 0); }; if (my $err = $@) { PVE::LXC::destroy_disks($storage_cfg, $vollist); diff --git a/src/PVE/LXC/Create.pm b/src/PVE/LXC/Create.pm index f4c3220..74d7954 100644 --- a/src/PVE/LXC/Create.pm +++ b/src/PVE/LXC/Create.pm @@ -83,27 +83,33 @@ sub detect_architecture { } sub restore_archive { - my ($storage_cfg, $archive, $rootdir, $conf, $no_unpack_error, $bwlimit) = @_; + my ($storage_cfg, $archive, $rootdir, $conf, $no_unpack_error, $bwlimit, $orig_mp_param) = @_; + my $orig_mps; + PVE::LXC::Config->foreach_volume($orig_mp_param, sub { + my ($name, $vol, undef) = @_; + $orig_mps->{$name} = $vol; + }); my ($storeid, $volname) = PVE::Storage::parse_volume_id($archive, 1); if (defined($storeid)) { my $scfg = PVE::Storage::storage_check_enabled($storage_cfg, $storeid); if ($scfg->{type} eq 'pbs') { - return restore_proxmox_backup_archive($storage_cfg, $archive, $rootdir, $conf, $no_unpack_error, $bwlimit); + return restore_proxmox_backup_archive( + $storage_cfg, $archive, $rootdir, $conf, $no_unpack_error, $bwlimit, $orig_mps); } } $archive = PVE::Storage::abs_filesystem_path($storage_cfg, $archive) if $archive ne '-'; - restore_tar_archive($archive, $rootdir, $conf, $no_unpack_error, $bwlimit); + restore_tar_archive($archive, $rootdir, $conf, $no_unpack_error, $bwlimit, $orig_mps); } sub restore_proxmox_backup_archive { - my ($storage_cfg, $archive, $rootdir, $conf, $no_unpack_error, $bwlimit) = @_; + my ($storage_cfg, $archive, $rootdir, $conf, $no_unpack_error, $bwlimit, $orig_mps) = @_; my ($storeid, $volname) = PVE::Storage::parse_volume_id($archive); my $scfg = PVE::Storage::storage_config($storage_cfg, $storeid); - my ($vtype, $name, undef, undef, undef, undef, $format) = + my ($vtype, $snapshot, undef, undef, undef, undef, $format) = PVE::Storage::parse_volname($storage_cfg, $archive); die "got unexpected vtype '$vtype'\n" if $vtype ne 'backup'; @@ -114,14 +120,47 @@ sub restore_proxmox_backup_archive { my $userns_cmd = PVE::LXC::userns_command($id_map); my $cmd = "restore"; - my $param = [$name, "root.pxar", $rootdir, '--allow-existing-dirs']; + PVE::LXC::Config->foreach_volume($conf, sub { + my ($name, $vol, undef) = @_; - if ($no_unpack_error) { - push(@$param, '--ignore-extract-device-errors'); - } + my $orig_mp = $orig_mps->{$name}; + if (!defined($orig_mp)) { + print "'$name': mp not present in original backup.\n"; + return; + } - PVE::Storage::PBSPlugin::run_raw_client_cmd( - $scfg, $storeid, $cmd, $param, userns_cmd => $userns_cmd); + if ($name ne 'rootfs' && (!defined($orig_mp->{backup}) || !$orig_mp->{backup})) { + print "'$name': mp not included in original backup.\n"; + return; + } + + $name = 'root' if $name eq 'rootfs'; + my $target = "$rootdir/.$vol->{mp}"; + if ($orig_mp->{mp} ne $vol->{mp}) { + print "'$name': path differs from backed-up path, restore to backed-up path.\n"; + print " If this is not intended, change the path after restore.\n"; + $target = "$rootdir/.$orig_mp->{mp}"; + } + + my $param = [$snapshot, "$name.pxar", $target, '--allow-existing-dirs']; + + if ($no_unpack_error) { + push(@$param, '--ignore-extract-device-errors'); + } + + eval { + # This will fail for backups created without mp archive splitting + PVE::Storage::PBSPlugin::run_raw_client_cmd( + $scfg, $storeid, $cmd, $param, userns_cmd => $userns_cmd); + }; + my $err = $@; + if ($err) { + # Only handle root restore failure as hard error + die $err if $name eq 'root'; + print "extracting moutpoint '$name' failed:\n$err"; + print "backup created with older version?\n"; + } + }); # if arch is set, we do not try to autodetect it return if defined($conf->{arch}); @@ -130,11 +169,20 @@ sub restore_proxmox_backup_archive { } sub restore_tar_archive { - my ($archive, $rootdir, $conf, $no_unpack_error, $bwlimit) = @_; + my ($archive, $rootdir, $conf, $no_unpack_error, $bwlimit, $orig_mps) = @_; my ($id_map, $rootuid, $rootgid) = PVE::LXC::parse_id_maps($conf); my $userns_cmd = PVE::LXC::userns_command($id_map); + PVE::LXC::Config->foreach_volume($conf, sub { + my ($name, $vol, undef) = @_; + my $orig_mp = $orig_mps->{$name}; + if (defined($orig_mp->{mp}) && $orig_mp->{mp} ne $vol->{mp}) { + print "'$name': path differs from backed-up path, restore to backed-up path.\n"; + print " If this is not intended, change the path after restore.\n"; + } + }); + my $archive_fh; my $tar_input = '<&STDIN'; my @compression_opt; diff --git a/src/PVE/VZDump/LXC.pm b/src/PVE/VZDump/LXC.pm index c68a06f..0d411b8 100644 --- a/src/PVE/VZDump/LXC.pm +++ b/src/PVE/VZDump/LXC.pm @@ -381,11 +381,11 @@ sub archive { push @$param, "fw.conf:$fw_conf"; } - my $rootdir = $snapdir; - push @$param, "root.pxar:$rootdir"; - - foreach my $disk (@sources) { - push @$param, '--include-dev', "$snapdir/$disk"; + foreach my $disk (@$disks) { + my $name = $disk->{name}; + # Needed for backwards compatibility with previous backups + $name = 'root' if $name eq 'rootfs'; + push @$param, "$name.pxar:$snapdir/.$disk->{mp}"; } push @$param, '--skip-lost-and-found' if $userns_cmd; -- 2.39.2