use File::Basename;
use File::Path;
use Data::Dumper;
+use Fcntl;
use PVE::Storage;
use PVE::LXC;
use PVE::LXC::Setup;
use PVE::VZDump::ConvertOVZ;
use PVE::Tools;
+use POSIX;
-sub next_free_nbd_dev {
-
- for(my $i = 0;;$i++) {
- my $dev = "/dev/nbd$i";
- last if ! -b $dev;
- next if -f "/sys/block/nbd$i/pid"; # busy
- return $dev;
+sub get_elf_class {
+ my ($rootdir, $elf_fn) = @_;
+
+ my $child_pid = fork();
+ die "fork failed: $!\n" if !defined($child_pid);
+
+ if (!$child_pid) {
+ # chroot avoids a problem where we check the binary of the host system
+ # if $elf_fn is an absolut symlink (e.g. $rootdir/bin/sh -> /bin/bash)
+ chroot($rootdir) or die "chroot '$rootdir' failed: $!\n";
+ chdir('/') or die "failed to change to root directory\n";
+
+ my $fh;
+ open($fh, "<", $elf_fn) or die "open '$elf_fn' failed: $!\n";
+ binmode($fh);
+
+ my $data;
+ my $length = read($fh, $data, 5);
+ die "read failed: $!\n" if !defined($length);
+
+ # 4 bytes ELF magic number and 1 byte ELF class
+ my ($magic, $class) = unpack("A4C", $data);
+
+ die "'$elf_fn' does not resolve to an ELF!\n"
+ if (!defined($class) || !defined($magic) || $magic ne "\177ELF");
+
+ die "'$elf_fn' has unknown ELF class '$class'!\n"
+ if ($class != 1 && $class != 2);
+
+ POSIX::_exit($class);
+ }
+
+ while (waitpid($child_pid, 0) != $child_pid) {}
+ my $exit_code = $?;
+ if (my $sig = ($exit_code & 127)) {
+ warn "could not get architecture, got signal $sig\n";
+ } else {
+ $exit_code >>= 8;
}
- die "unable to find free nbd device\n";
+
+ return $exit_code;
}
sub restore_archive {
my ($id_map, $rootuid, $rootgid) = PVE::LXC::parse_id_maps($conf);
my $userns_cmd = PVE::LXC::userns_command($id_map);
- my $cmd = [@$userns_cmd, 'tar', 'xpf', $archive, '--totals',
+ my $archive_fh;
+ my $tar_input_file = '-';
+ if ($archive ne '-') {
+ sysopen($archive_fh, $archive, O_RDONLY)
+ or die "failed to open '$archive': $!\n";
+ $tar_input_file = '/proc/self/fd/'.fileno($archive_fh);
+ my $flags = $archive_fh->fcntl(Fcntl::F_GETFD(), 0);
+ $archive_fh->fcntl(Fcntl::F_SETFD(), $flags & ~(Fcntl::FD_CLOEXEC()));
+ }
+
+ my $cmd = [@$userns_cmd, 'tar', 'xpf', $tar_input_file, '--totals',
@$PVE::LXC::COMMON_TAR_FLAGS,
'-C', $rootdir];
print "extracting archive '$archive'\n";
eval { PVE::Tools::run_command($cmd); };
}
- die $@ if $@ && !$no_unpack_error;
-
- # determine file type of /usr/bin/file itself to get guests' architecture
- $cmd = [@$userns_cmd, '/usr/bin/file', '-b', '-L', "$rootdir/bin/sh"];
- PVE::Tools::run_command($cmd, outfunc => sub {
- shift =~ /^ELF (\d{2}-bit)/; # safely assumes x86 linux
- my $arch_str = $1;
- $conf->{'arch'} = 'amd64'; # defaults to 64bit
- if(defined($arch_str)) {
- $conf->{'arch'} = 'i386' if $arch_str =~ /32/;
- print "Detected container architecture: $conf->{'arch'}\n";
- } else {
- print "CT architecture detection failed, falling back to amd64.\n" .
- "Edit the config in /etc/pve/nodes/{node}/lxc/{vmid}/config " .
- "to set another architecture.\n";
- }
- });
-}
+ my $err = $@;
+ close($archive_fh) if defined $archive_fh;
+ die $err if $err && !$no_unpack_error;
-sub tar_archive_search_conf {
- my ($archive) = @_;
+ # if arch is set, we do not try to autodetect it
+ return if defined($conf->{arch});
- die "ERROR: file '$archive' does not exist\n" if ! -f $archive;
- my $pid = open(my $fh, '-|', 'tar', 'tf', $archive) ||
- die "unable to open file '$archive'\n";
+ my $elf_class = get_elf_class($rootdir, '/bin/sh'); # /bin/sh is POSIX mandatory
- my $file;
- while (defined($file = <$fh>)) {
- if ($file =~ m!^(\./etc/vzdump/(pct|vps)\.conf)$!) {
- $file = $1; # untaint
- last;
- }
+ $conf->{'arch'} = 'amd64'; # defaults to 64bit
+ if ($elf_class == 1 || $elf_class == 2) {
+ $conf->{'arch'} = 'i386' if $elf_class == 1;
+ print "Detected container architecture: $conf->{'arch'}\n";
+ } else {
+ print "CT architecture detection failed, falling back to amd64.\n" .
+ "Edit the config in /etc/pve/nodes/{node}/lxc/{vmid}.conf " .
+ "to set another architecture.\n";
}
-
- kill 15, $pid;
- waitpid $pid, 0;
- close $fh;
-
- die "ERROR: archive contains no configuration file\n" if !$file;
- chomp $file;
-
- return $file;
}
sub recover_config {
my ($archive) = @_;
- my $conf_file = tar_archive_search_conf($archive);
-
- my $raw = '';
- my $out = sub {
- my $output = shift;
- $raw .= "$output\n";
- };
-
- PVE::Tools::run_command(['tar', '-xpOf', $archive, $conf_file, '--occurrence'], outfunc => $out);
-
+ my ($raw, $conf_file) = PVE::Storage::extract_vzdump_config_tar($archive, qr!(\./etc/vzdump/(pct|vps)\.conf)$!);
my $conf;
- my $disksize;
+ my $mp_param = {};
if ($conf_file =~ m/pct\.conf/) {
delete $conf->{snapshots};
delete $conf->{template}; # restored CT is never a template
-
- if (defined($conf->{rootfs})) {
- my $rootinfo = PVE::LXC::Config->parse_ct_rootfs($conf->{rootfs});
- $disksize = $rootinfo->{size} if defined($rootinfo->{size});
- }
-
+
+ PVE::LXC::Config->foreach_mountpoint($conf, sub {
+ my ($ms, $mountpoint) = @_;
+ $mp_param->{$ms} = $conf->{$ms};
+ });
+
} elsif ($conf_file =~ m/vps\.conf/) {
-
- ($conf, $disksize) = PVE::VZDump::ConvertOVZ::convert_ovz($raw);
-
+
+ ($conf, $mp_param) = PVE::VZDump::ConvertOVZ::convert_ovz($raw);
+
} else {
die "internal error";
}
- return wantarray ? ($conf, $disksize) : $conf;
+ return wantarray ? ($conf, $mp_param) : $conf;
}
-sub restore_and_configure {
- my ($vmid, $archive, $rootdir, $conf, $password, $restore, $no_unpack_error, $ssh_keys) = @_;
-
- restore_archive($archive, $rootdir, $conf, $no_unpack_error);
-
- if (!$restore) {
- my $lxc_setup = PVE::LXC::Setup->new($conf, $rootdir); # detect OS
-
- PVE::LXC::Config->write_config($vmid, $conf); # safe config (after OS detection)
- $lxc_setup->post_create_hook($password, $ssh_keys);
- } else {
- # restore: try to extract configuration from archive
-
- my $pct_cfg_fn = "$rootdir/etc/vzdump/pct.conf";
- my $pct_fwcfg_fn = "$rootdir/etc/vzdump/pct.fw";
- my $ovz_cfg_fn = "$rootdir/etc/vzdump/vps.conf";
- if (-f $pct_cfg_fn) {
- my $raw = PVE::Tools::file_get_contents($pct_cfg_fn);
- my $oldconf = PVE::LXC::Config::parse_pct_config("/lxc/$vmid.conf", $raw);
-
- foreach my $key (keys %$oldconf) {
- next if $key eq 'digest' || $key eq 'rootfs' || $key eq 'snapshots' || $key eq 'unprivileged';
- next if $key =~ /^mp\d+$/; # don't recover mountpoints
- $conf->{$key} = $oldconf->{$key} if !defined($conf->{$key});
- }
- unlink($pct_cfg_fn);
-
- if (-f $pct_fwcfg_fn) {
- my $pve_firewall_dir = '/etc/pve/firewall';
- mkdir $pve_firewall_dir; # make sure the directory exists
- PVE::Tools::file_copy($pct_fwcfg_fn, "${pve_firewall_dir}/$vmid.fw");
- unlink $pct_fwcfg_fn;
- }
-
- } elsif (-f $ovz_cfg_fn) {
- print "###########################################################\n";
- print "Converting OpenVZ configuration to LXC.\n";
- print "Please check the configuration and reconfigure the network.\n";
- print "###########################################################\n";
-
- my $lxc_setup = PVE::LXC::Setup->new($conf, $rootdir); # detect OS
- $conf->{ostype} = $lxc_setup->{conf}->{ostype};
- my $raw = PVE::Tools::file_get_contents($ovz_cfg_fn);
- my $oldconf = PVE::VZDump::ConvertOVZ::convert_ovz($raw);
- foreach my $key (keys %$oldconf) {
- $conf->{$key} = $oldconf->{$key} if !defined($conf->{$key});
+sub restore_configuration {
+ my ($vmid, $rootdir, $conf, $restricted) = @_;
+
+ # restore: try to extract configuration from archive
+
+ my $pct_cfg_fn = "$rootdir/etc/vzdump/pct.conf";
+ my $pct_fwcfg_fn = "$rootdir/etc/vzdump/pct.fw";
+ my $ovz_cfg_fn = "$rootdir/etc/vzdump/vps.conf";
+ if (-f $pct_cfg_fn) {
+ my $raw = PVE::Tools::file_get_contents($pct_cfg_fn);
+ my $oldconf = PVE::LXC::Config::parse_pct_config("/lxc/$vmid.conf", $raw);
+
+ foreach my $key (keys %$oldconf) {
+ next if $key eq 'digest' || $key eq 'rootfs' || $key eq 'snapshots' || $key eq 'unprivileged' || $key eq 'parent';
+ next if $key =~ /^mp\d+$/; # don't recover mountpoints
+ next if $key =~ /^unused\d+$/; # don't recover unused disks
+ if ($restricted && $key eq 'lxc') {
+ warn "skipping custom lxc options, restore manually as root:\n";
+ warn "--------------------------------\n";
+ my $lxc_list = $oldconf->{'lxc'};
+ foreach my $lxc_opt (@$lxc_list) {
+ warn "$lxc_opt->[0]: $lxc_opt->[1]\n"
+ }
+ warn "--------------------------------\n";
+ next;
}
- unlink($ovz_cfg_fn);
+ $conf->{$key} = $oldconf->{$key} if !defined($conf->{$key});
+ }
+ unlink($pct_cfg_fn);
- } else {
- print "###########################################################\n";
- print "Backup archive does not contain any configuration\n";
- print "###########################################################\n";
+ if (-f $pct_fwcfg_fn) {
+ my $pve_firewall_dir = '/etc/pve/firewall';
+ mkdir $pve_firewall_dir; # make sure the directory exists
+ PVE::Tools::file_copy($pct_fwcfg_fn, "${pve_firewall_dir}/$vmid.fw");
+ unlink $pct_fwcfg_fn;
}
- }
-}
-sub create_rootfs {
- my ($storage_cfg, $vmid, $conf, $archive, $password, $restore, $no_unpack_error, $ssh_keys) = @_;
+ } elsif (-f $ovz_cfg_fn) {
+ print "###########################################################\n";
+ print "Converting OpenVZ configuration to LXC.\n";
+ print "Please check the configuration and reconfigure the network.\n";
+ print "###########################################################\n";
- my $config_fn = PVE::LXC::Config->config_file($vmid);
- if (-f $config_fn) {
- die "container exists" if !$restore; # just to be sure
+ my $lxc_setup = PVE::LXC::Setup->new($conf, $rootdir); # detect OS
+ $conf->{ostype} = $lxc_setup->{conf}->{ostype};
+ my $raw = PVE::Tools::file_get_contents($ovz_cfg_fn);
+ my $oldconf = PVE::VZDump::ConvertOVZ::convert_ovz($raw);
+ foreach my $key (keys %$oldconf) {
+ $conf->{$key} = $oldconf->{$key} if !defined($conf->{$key});
+ }
+ unlink($ovz_cfg_fn);
- my $old_conf = PVE::LXC::Config->load_config($vmid);
-
- # destroy old container volume
- PVE::LXC::destroy_lxc_container($storage_cfg, $vmid, $old_conf);
+ } else {
+ print "###########################################################\n";
+ print "Backup archive does not contain any configuration\n";
+ print "###########################################################\n";
}
-
- PVE::LXC::Config->write_config($vmid, $conf);
-
- eval {
- my $rootdir = PVE::LXC::mount_all($vmid, $storage_cfg, $conf);
- restore_and_configure($vmid, $archive, $rootdir, $conf, $password,
- $restore, $no_unpack_error, $ssh_keys);
- };
- my $err = $@;
- PVE::LXC::umount_all($vmid, $storage_cfg, $conf, $err ? 1 : 0);
- PVE::Storage::deactivate_volumes($storage_cfg, PVE::LXC::Config->get_vm_volumes($conf));
- die $err if $err;
}
1;
projects / pve-container.git / blobdiff