pve-zsync

   1 #!/usr/bin/perl
   2
   3 use strict;
   4 use warnings;
   5 use Data::Dumper qw(Dumper);
   6 use Fcntl qw(:flock SEEK_END);
   7 use Getopt::Long qw(GetOptionsFromArray);
   8 use File::Copy qw(move);
   9 use File::Path qw(make_path);
  10 use JSON;
  11 use IO::File;
  12 use String::ShellQuote 'shell_quote';
  13
  14 my $PROGNAME = "pve-zsync";
  15 my $CONFIG_PATH = "/var/lib/${PROGNAME}";
  16 my $STATE = "${CONFIG_PATH}/sync_state";
  17 my $CRONJOBS = "/etc/cron.d/$PROGNAME";
  18 my $PATH = "/usr/sbin";
  19 my $PVE_DIR = "/etc/pve/local";
  20 my $QEMU_CONF = "${PVE_DIR}/qemu-server";
  21 my $LXC_CONF = "${PVE_DIR}/lxc";
  22 my $LOCKFILE = "$CONFIG_PATH/${PROGNAME}.lock";
  23 my $PROG_PATH = "$PATH/${PROGNAME}";
  24 my $INTERVAL = 15;
  25 my $DEBUG = 0;
  26
  27 my $IPV4OCTET = "(?:25[0-5]|(?:[1-9]|1[0-9]|2[0-4])?[0-9])";
  28 my $IPV4RE = "(?:(?:$IPV4OCTET\\.){3}$IPV4OCTET)";
  29 my $IPV6H16 = "(?:[0-9a-fA-F]{1,4})";
  30 my $IPV6LS32 = "(?:(?:$IPV4RE|$IPV6H16:$IPV6H16))";
  31
  32 my $IPV6RE = "(?:" .
  33     "(?:(?:" .                             "(?:$IPV6H16:){6})$IPV6LS32)|" .
  34     "(?:(?:" .                           "::(?:$IPV6H16:){5})$IPV6LS32)|" .
  35     "(?:(?:(?:" .              "$IPV6H16)?::(?:$IPV6H16:){4})$IPV6LS32)|" .
  36     "(?:(?:(?:(?:$IPV6H16:){0,1}$IPV6H16)?::(?:$IPV6H16:){3})$IPV6LS32)|" .
  37     "(?:(?:(?:(?:$IPV6H16:){0,2}$IPV6H16)?::(?:$IPV6H16:){2})$IPV6LS32)|" .
  38     "(?:(?:(?:(?:$IPV6H16:){0,3}$IPV6H16)?::(?:$IPV6H16:){1})$IPV6LS32)|" .
  39     "(?:(?:(?:(?:$IPV6H16:){0,4}$IPV6H16)?::" .           ")$IPV6LS32)|" .
  40     "(?:(?:(?:(?:$IPV6H16:){0,5}$IPV6H16)?::" .            ")$IPV6H16)|" .
  41     "(?:(?:(?:(?:$IPV6H16:){0,6}$IPV6H16)?::" .                    ")))";
  42
  43 my $HOSTv4RE0 = "(?:[\\w\\.\\-_]+|$IPV4RE)";       # hostname or ipv4 address
  44 my $HOSTv4RE1 = "(?:$HOSTv4RE0|\\[$HOSTv4RE0\\])"; # these may be in brackets, too
  45 my $HOSTRE = "(?:$HOSTv4RE1|\\[$IPV6RE\\])";       # ipv6 must always be in brackets
  46 # targets are either a VMID, or a 'host:zpool/path' with 'host:' being optional
  47 my $TARGETRE = qr!^(?:($HOSTRE):)?(\d+|(?:[\w\-_]+)(/.+)?)$!;
  48
  49 check_bin ('cstream');
  50 check_bin ('zfs');
  51 check_bin ('ssh');
  52 check_bin ('scp');
  53
  54 $SIG{TERM} = $SIG{QUIT} = $SIG{PIPE} = $SIG{HUP} = $SIG{KILL} = $SIG{INT} =
  55     sub {
  56         die "Signal aborting sync\n";
  57     };
  58
  59 sub check_bin {
  60     my ($bin)  = @_;
  61
  62     foreach my $p (split (/:/, $ENV{PATH})) {
  63         my $fn = "$p/$bin";
  64         if (-x $fn) {
  65             return $fn;
  66         }
  67     }
  68
  69     die "unable to find command '$bin'\n";
  70 }
  71
  72 sub cut_target_width {
  73     my ($path, $maxlen) = @_;
  74     $path =~ s@/+@/@g;
  75
  76     return $path if length($path) <= $maxlen;
  77
  78     return '..'.substr($path, -$maxlen+2) if $path !~ m@/@;
  79
  80     $path =~ s@/([^/]+/?)$@@;
  81     my $tail = $1;
  82
  83     if (length($tail)+3 == $maxlen) {
  84         return "../$tail";
  85     } elsif (length($tail)+2 >= $maxlen) {
  86         return '..'.substr($tail, -$maxlen+2)
  87     }
  88
  89     $path =~ s@(/[^/]+)(?:/|$)@@;
  90     my $head = $1;
  91     my $both = length($head) + length($tail);
  92     my $remaining = $maxlen-$both-4; # -4 for "/../"
  93
  94     if ($remaining < 0) {
  95         return substr($head, 0, $maxlen - length($tail) - 3) . "../$tail"; # -3 for "../"
  96     }
  97
  98     substr($path, ($remaining/2), (length($path)-$remaining), '..');
  99     return "$head/" . $path . "/$tail";
 100 }
 101
 102 sub lock {
 103     my ($fh) = @_;
 104     flock($fh, LOCK_EX) || die "Can't lock config - $!\n";
 105 }
 106
 107 sub unlock {
 108     my ($fh) = @_;
 109     flock($fh, LOCK_UN) || die "Can't unlock config- $!\n";
 110 }
 111
 112 sub get_status {
 113     my ($source, $name, $status) = @_;
 114
 115     if ($status->{$source->{all}}->{$name}->{status}) {
 116         return $status;
 117     }
 118
 119     return undef;
 120 }
 121
 122 sub check_pool_exists {
 123     my ($target) = @_;
 124
 125     my $cmd = [];
 126
 127     if ($target->{ip}) {
 128         push @$cmd, 'ssh', "root\@$target->{ip}", '--';
 129     }
 130     push @$cmd, 'zfs', 'list', '-H', '--', $target->{all};
 131     eval {
 132         run_cmd($cmd);
 133     };
 134
 135     if ($@) {
 136         return 0;
 137     }
 138     return 1;
 139 }
 140
 141 sub parse_target {
 142     my ($text) = @_;
 143
 144     my $errstr = "$text : is not a valid input! Use [IP:]<VMID> or [IP:]<ZFSPool>[/Path]";
 145     my $target = {};
 146
 147     if ($text !~ $TARGETRE) {
 148         die "$errstr\n";
 149     }
 150     $target->{all} = $2;
 151     $target->{ip} = $1 if $1;
 152     my @parts = split('/', $2);
 153
 154     $target->{ip} =~ s/^\[(.*)\]$/$1/ if $target->{ip};
 155
 156     my $pool = $target->{pool} = shift(@parts);
 157     die "$errstr\n" if !$pool;
 158
 159     if ($pool =~ m/^\d+$/) {
 160         $target->{vmid} = $pool;
 161         delete $target->{pool};
 162     }
 163
 164     return $target if (@parts == 0);
 165     $target->{last_part} = pop(@parts);
 166
 167     if ($target->{ip}) {
 168         pop(@parts);
 169     }
 170     if (@parts > 0) {
 171         $target->{path} = join('/', @parts);
 172     }
 173
 174     return $target;
 175 }
 176
 177 sub read_cron {
 178
 179     #This is for the first use to init file;
 180     if (!-e $CRONJOBS) {
 181         my $new_fh = IO::File->new("> $CRONJOBS");
 182         die "Could not create $CRONJOBS: $!\n" if !$new_fh;
 183         close($new_fh);
 184         return undef;
 185     }
 186
 187     my $fh = IO::File->new("< $CRONJOBS");
 188     die "Could not open file $CRONJOBS: $!\n" if !$fh;
 189
 190     my @text = <$fh>;
 191
 192     close($fh);
 193
 194     return encode_cron(@text);
 195 }
 196
 197 sub parse_argv {
 198     my (@arg) = @_;
 199
 200     my $param = {};
 201     $param->{dest} = undef;
 202     $param->{source} = undef;
 203     $param->{verbose} = undef;
 204     $param->{limit} = undef;
 205     $param->{maxsnap} = undef;
 206     $param->{name} = undef;
 207     $param->{skip} = undef;
 208     $param->{method} = undef;
 209
 210     my ($ret, $ar) = GetOptionsFromArray(\@arg,
 211                                          'dest=s' => \$param->{dest},
 212                                          'source=s' => \$param->{source},
 213                                          'verbose' => \$param->{verbose},
 214                                          'limit=i' => \$param->{limit},
 215                                          'maxsnap=i' => \$param->{maxsnap},
 216                                          'name=s' => \$param->{name},
 217                                          'skip' => \$param->{skip},
 218                                          'method=s' => \$param->{method});
 219
 220     if ($ret == 0) {
 221         die "can't parse options\n";
 222     }
 223
 224     $param->{name} = "default" if !$param->{name};
 225     $param->{maxsnap} = 1 if !$param->{maxsnap};
 226     $param->{method} = "ssh" if !$param->{method};
 227
 228     return $param;
 229 }
 230
 231 sub add_state_to_job {
 232     my ($job) = @_;
 233
 234     my $states = read_state();
 235     my $state = $states->{$job->{source}}->{$job->{name}};
 236
 237     $job->{state} = $state->{state};
 238     $job->{lsync} = $state->{lsync};
 239     $job->{vm_type} = $state->{vm_type};
 240
 241     for (my $i = 0; $state->{"snap$i"}; $i++) {
 242         $job->{"snap$i"} = $state->{"snap$i"};
 243     }
 244
 245     return $job;
 246 }
 247
 248 sub encode_cron {
 249     my (@text) = @_;
 250
 251     my $cfg = {};
 252
 253     while (my $line = shift(@text)) {
 254
 255         my @arg = split('\s', $line);
 256         my $param = parse_argv(@arg);
 257
 258         if ($param->{source} && $param->{dest}) {
 259             $cfg->{$param->{source}}->{$param->{name}}->{dest} = $param->{dest};
 260             $cfg->{$param->{source}}->{$param->{name}}->{verbose} = $param->{verbose};
 261             $cfg->{$param->{source}}->{$param->{name}}->{limit} = $param->{limit};
 262             $cfg->{$param->{source}}->{$param->{name}}->{maxsnap} = $param->{maxsnap};
 263             $cfg->{$param->{source}}->{$param->{name}}->{skip} = $param->{skip};
 264             $cfg->{$param->{source}}->{$param->{name}}->{method} = $param->{method};
 265         }
 266     }
 267
 268     return $cfg;
 269 }
 270
 271 sub param_to_job {
 272     my ($param) = @_;
 273
 274     my $job = {};
 275
 276     my $source = parse_target($param->{source});
 277     my $dest = parse_target($param->{dest}) if $param->{dest};
 278
 279     $job->{name} = !$param->{name} ? "default" : $param->{name};
 280     $job->{dest} = $param->{dest} if $param->{dest};
 281     $job->{method} = "local" if !$dest->{ip} && !$source->{ip};
 282     $job->{method} = "ssh" if !$job->{method};
 283     $job->{limit} = $param->{limit};
 284     $job->{maxsnap} = $param->{maxsnap} if $param->{maxsnap};
 285     $job->{source} = $param->{source};
 286
 287     return $job;
 288 }
 289
 290 sub read_state {
 291
 292     if (!-e $STATE) {
 293         make_path $CONFIG_PATH;
 294         my $new_fh = IO::File->new("> $STATE");
 295         die "Could not create $STATE: $!\n" if !$new_fh;
 296         print $new_fh "{}";
 297         close($new_fh);
 298         return undef;
 299     }
 300
 301     my $fh = IO::File->new("< $STATE");
 302     die "Could not open file $STATE: $!\n" if !$fh;
 303
 304     my $text = <$fh>;
 305     my $states = decode_json($text);
 306
 307     close($fh);
 308
 309     return $states;
 310 }
 311
 312 sub update_state {
 313     my ($job) = @_;
 314     my $text;
 315     my $in_fh;
 316
 317     eval {
 318
 319         $in_fh = IO::File->new("< $STATE");
 320         die "Could not open file $STATE: $!\n" if !$in_fh;
 321         lock($in_fh);
 322         $text = <$in_fh>;
 323     };
 324
 325     my $out_fh = IO::File->new("> $STATE.new");
 326     die "Could not open file ${STATE}.new: $!\n" if !$out_fh;
 327
 328     my $states = {};
 329     my $state = {};
 330     if ($text){
 331         $states = decode_json($text);
 332         $state = $states->{$job->{source}}->{$job->{name}};
 333     }
 334
 335     if ($job->{state} ne "del") {
 336         $state->{state} = $job->{state};
 337         $state->{lsync} = $job->{lsync};
 338         $state->{vm_type} = $job->{vm_type};
 339
 340         for (my $i = 0; $job->{"snap$i"} ; $i++) {
 341             $state->{"snap$i"} = $job->{"snap$i"};
 342         }
 343         $states->{$job->{source}}->{$job->{name}} = $state;
 344     } else {
 345
 346         delete $states->{$job->{source}}->{$job->{name}};
 347         delete $states->{$job->{source}} if !keys %{$states->{$job->{source}}};
 348     }
 349
 350     $text = encode_json($states);
 351     print $out_fh $text;
 352
 353     close($out_fh);
 354     move("$STATE.new", $STATE);
 355     eval {
 356         close($in_fh);
 357     };
 358
 359     return $states;
 360 }
 361
 362 sub update_cron {
 363     my ($job) = @_;
 364
 365     my $updated;
 366     my $has_header;
 367     my $line_no = 0;
 368     my $text = "";
 369     my $header = "SHELL=/bin/sh\n";
 370     $header .= "PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin\n\n";
 371
 372     my $fh = IO::File->new("< $CRONJOBS");
 373     die "Could not open file $CRONJOBS: $!\n" if !$fh;
 374     lock($fh);
 375
 376     my @test = <$fh>;
 377
 378     while (my $line = shift(@test)) {
 379         chomp($line);
 380         if ($line =~ m/source $job->{source} .*name $job->{name} /) {
 381             $updated = 1;
 382             next if $job->{state} eq "del";
 383             $text .= format_job($job, $line);
 384         } else {
 385             if (($line_no < 3) && ($line =~ /^(PATH|SHELL)/ )) {
 386                 $has_header = 1;
 387             }
 388             $text .= "$line\n";
 389         }
 390         $line_no++;
 391     }
 392
 393     if (!$has_header) {
 394         $text = "$header$text";
 395     }
 396
 397     if (!$updated) {
 398         $text .= format_job($job);
 399     }
 400     my $new_fh = IO::File->new("> ${CRONJOBS}.new");
 401     die "Could not open file ${CRONJOBS}.new: $!\n" if !$new_fh;
 402
 403     die "can't write to $CRONJOBS.new\n" if !print($new_fh $text);
 404     close ($new_fh);
 405
 406     die "can't move $CRONJOBS.new: $!\n" if !move("${CRONJOBS}.new", "$CRONJOBS");
 407     close ($fh);
 408 }
 409
 410 sub format_job {
 411     my ($job, $line) = @_;
 412     my $text = "";
 413
 414     if ($job->{state} eq "stopped") {
 415         $text = "#";
 416     }
 417     if ($line) {
 418         $line =~ /^#*(.+) root/;
 419         $text .= $1;
 420     } else {
 421         $text .= "*/$INTERVAL * * * *";
 422     }
 423     $text .= " root";
 424     $text .= " $PROGNAME sync --source $job->{source} --dest $job->{dest}";
 425     $text .= " --name $job->{name} --maxsnap $job->{maxsnap}";
 426     $text .= " --limit $job->{limit}" if $job->{limit};
 427     $text .= " --method $job->{method}";
 428     $text .= " --verbose" if $job->{verbose};
 429     $text .= "\n";
 430
 431     return $text;
 432 }
 433
 434 sub list {
 435
 436     my $cfg = read_cron();
 437
 438     my $list = sprintf("%-25s%-25s%-10s%-20s%-6s%-5s\n" , "SOURCE", "NAME", "STATE", "LAST SYNC", "TYPE", "CON");
 439
 440     my $states = read_state();
 441     foreach my $source (sort keys%{$cfg}) {
 442         foreach my $name (sort keys%{$cfg->{$source}}) {
 443             $list .= sprintf("%-25s", cut_target_width($source, 25));
 444             $list .= sprintf("%-25s", cut_target_width($name, 25));
 445             $list .= sprintf("%-10s", $states->{$source}->{$name}->{state});
 446             $list .= sprintf("%-20s", $states->{$source}->{$name}->{lsync});
 447             $list .= sprintf("%-6s", defined($states->{$source}->{$name}->{vm_type}) ? $states->{$source}->{$name}->{vm_type} : "undef");
 448             $list .= sprintf("%-5s\n", $cfg->{$source}->{$name}->{method});
 449         }
 450     }
 451
 452     return $list;
 453 }
 454
 455 sub vm_exists {
 456     my ($target) = @_;
 457
 458     my @cmd = ('ssh', "root\@$target->{ip}", '--') if $target->{ip};
 459
 460     my $res = undef;
 461
 462     return undef if !defined($target->{vmid});
 463
 464     eval { $res = run_cmd([@cmd, 'ls',  "$QEMU_CONF/$target->{vmid}.conf"]) };
 465
 466     return "qemu" if $res;
 467
 468     eval { $res = run_cmd([@cmd, 'ls',  "$LXC_CONF/$target->{vmid}.conf"]) };
 469
 470     return "lxc" if $res;
 471
 472     return undef;
 473 }
 474
 475 sub init {
 476     my ($param) = @_;
 477
 478     my $cfg = read_cron();
 479
 480     my $job = param_to_job($param);
 481
 482     $job->{state} = "ok";
 483     $job->{lsync} = 0;
 484
 485     my $source = parse_target($param->{source});
 486     my $dest = parse_target($param->{dest});
 487
 488     if (my $ip =  $dest->{ip}) {
 489         run_cmd(['ssh-copy-id', '-i', '/root/.ssh/id_rsa.pub', "root\@$ip"]);
 490     }
 491
 492     if (my $ip =  $source->{ip}) {
 493         run_cmd(['ssh-copy-id', '-i', '/root/.ssh/id_rsa.pub', "root\@$ip"]);
 494     }
 495
 496     die "Pool $dest->{all} does not exists\n" if !check_pool_exists($dest);
 497
 498     if (!defined($source->{vmid})) {
 499         die "Pool $source->{all} does not exists\n" if !check_pool_exists($source);
 500     }
 501
 502     my $vm_type = vm_exists($source);
 503     $job->{vm_type} = $vm_type;
 504     $source->{vm_type} = $vm_type;
 505
 506     die "VM $source->{vmid} doesn't exist\n" if $source->{vmid} && !$vm_type;
 507
 508     die "Config already exists\n" if $cfg->{$job->{source}}->{$job->{name}};
 509
 510     #check if vm has zfs disks if not die;
 511     get_disks($source) if $source->{vmid};
 512
 513     update_cron($job);
 514     update_state($job);
 515
 516     eval {
 517         sync($param) if !$param->{skip};
 518     };
 519     if(my $err = $@) {
 520         destroy_job($param);
 521         print $err;
 522     }
 523 }
 524
 525 sub get_job {
 526     my ($param) = @_;
 527
 528     my $cfg = read_cron();
 529
 530     if (!$cfg->{$param->{source}}->{$param->{name}}) {
 531         die "Job  with source $param->{source} and name $param->{name} does not exist\n" ;
 532     }
 533     my $job = $cfg->{$param->{source}}->{$param->{name}};
 534     $job->{name} = $param->{name};
 535     $job->{source} = $param->{source};
 536     $job = add_state_to_job($job);
 537
 538     return $job;
 539 }
 540
 541 sub destroy_job {
 542     my ($param) = @_;
 543
 544     my $job = get_job($param);
 545     $job->{state} = "del";
 546
 547     update_cron($job);
 548     update_state($job);
 549 }
 550
 551 sub sync {
 552     my ($param) = @_;
 553
 554     my $lock_fh = IO::File->new("> $LOCKFILE");
 555     die "Can't open Lock File: $LOCKFILE $!\n" if !$lock_fh;
 556     lock($lock_fh);
 557
 558     my $date = get_date();
 559     my $job;
 560     eval {
 561         $job = get_job($param);
 562     };
 563
 564     if ($job && $job->{state} eq "syncing") {
 565         die "Job --source $param->{source} --name $param->{name} is syncing at the moment";
 566     }
 567
 568     my $dest = parse_target($param->{dest});
 569     my $source = parse_target($param->{source});
 570
 571     my $sync_path = sub {
 572         my ($source, $dest, $job, $param, $date) = @_;
 573
 574         ($source->{old_snap}, $source->{last_snap}) = snapshot_get($source, $dest, $param->{maxsnap}, $param->{name});
 575
 576         snapshot_add($source, $dest, $param->{name}, $date);
 577
 578         send_image($source, $dest, $param);
 579
 580         snapshot_destroy($source, $dest, $param->{method}, $source->{old_snap}) if ($source->{destroy} && $source->{old_snap});
 581
 582     };
 583
 584     my $vm_type = vm_exists($source);
 585     $source->{vm_type} = $vm_type;
 586
 587     if ($job) {
 588         $job->{state} = "syncing";
 589         $job->{vm_type} = $vm_type if !$job->{vm_type};
 590         update_state($job);
 591     }
 592
 593     eval{
 594         if ($source->{vmid}) {
 595             die "VM $source->{vmid} doesn't exist\n" if !$vm_type;
 596             my $disks = get_disks($source);
 597
 598             foreach my $disk (sort keys %{$disks}) {
 599                 $source->{all} = $disks->{$disk}->{all};
 600                 $source->{pool} = $disks->{$disk}->{pool};
 601                 $source->{path} = $disks->{$disk}->{path} if $disks->{$disk}->{path};
 602                 $source->{last_part} = $disks->{$disk}->{last_part};
 603                 &$sync_path($source, $dest, $job, $param, $date);
 604             }
 605             if ($param->{method} eq "ssh" && ($source->{ip} || $dest->{ip})) {
 606                 send_config($source, $dest,'ssh');
 607             } else {
 608                 send_config($source, $dest,'local');
 609             }
 610         } else {
 611             &$sync_path($source, $dest, $job, $param, $date);
 612         }
 613     };
 614     if(my $err = $@) {
 615         if ($job) {
 616             $job->{state} = "error";
 617             update_state($job);
 618             unlock($lock_fh);
 619             close($lock_fh);
 620             print "Job --source $param->{source} --name $param->{name} got an ERROR!!!\nERROR Message:\n";
 621         }
 622         die "$err\n";
 623     }
 624
 625     if ($job) {
 626         $job->{state} = "ok";
 627         $job->{lsync} = $date;
 628         update_state($job);
 629     }
 630
 631     unlock($lock_fh);
 632     close($lock_fh);
 633 }
 634
 635 sub snapshot_get{
 636     my ($source, $dest, $max_snap, $name) = @_;
 637
 638     my $cmd = [];
 639     push @$cmd, 'ssh', "root\@$source->{ip}", '--', if $source->{ip};
 640     push @$cmd, 'zfs', 'list', '-r', '-t', 'snapshot', '-Ho', 'name', '-S', 'creation';
 641     push @$cmd, $source->{all};
 642
 643     my $raw = run_cmd($cmd);
 644     my $index = 0;
 645     my $line = "";
 646     my $last_snap = undef;
 647     my $old_snap;
 648
 649     while ($raw && $raw =~ s/^(.*?)(\n|$)//) {
 650         $line = $1;
 651         if ($line =~ m/(rep_\Q${name}\E_\d{4}-\d{2}-\d{2}_\d{2}:\d{2}:\d{2})$/) {
 652
 653             $last_snap = $1 if (!$last_snap);
 654             $old_snap = $1;
 655             $index++;
 656             if ($index == $max_snap) {
 657                 $source->{destroy} = 1;
 658                 last;
 659             };
 660         }
 661     }
 662
 663     return ($old_snap, $last_snap) if $last_snap;
 664
 665     return undef;
 666 }
 667
 668 sub snapshot_add {
 669     my ($source, $dest, $name, $date) = @_;
 670
 671     my $snap_name = "rep_$name\_".$date;
 672
 673     $source->{new_snap} = $snap_name;
 674
 675     my $path = "$source->{all}\@$snap_name";
 676
 677     my $cmd = [];
 678     push @$cmd, 'ssh', "root\@$source->{ip}", '--', if $source->{ip};
 679     push @$cmd, 'zfs', 'snapshot', $path;
 680     eval{
 681         run_cmd($cmd);
 682     };
 683
 684     if (my $err = $@) {
 685         snapshot_destroy($source, $dest, 'ssh', $snap_name);
 686         die "$err\n";
 687     }
 688 }
 689
 690 sub write_cron {
 691     my ($cfg) = @_;
 692
 693     my $text = "SHELL=/bin/sh\n";
 694     $text .= "PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin\n";
 695
 696     my $fh = IO::File->new("> $CRONJOBS");
 697     die "Could not open file: $!\n" if !$fh;
 698
 699     foreach my $source (sort keys%{$cfg}) {
 700         foreach my $sync_name (sort keys%{$cfg->{$source}}) {
 701             next if $cfg->{$source}->{$sync_name}->{status} ne 'ok';
 702             $text .= "$PROG_PATH sync";
 703             $text .= " -source  ";
 704             if ($cfg->{$source}->{$sync_name}->{vmid}) {
 705                 $text .= "$cfg->{$source}->{$sync_name}->{source_ip}:" if $cfg->{$source}->{$sync_name}->{source_ip};
 706                 $text .= "$cfg->{$source}->{$sync_name}->{vmid} ";
 707             } else {
 708                 $text .= "$cfg->{$source}->{$sync_name}->{source_ip}:" if $cfg->{$source}->{$sync_name}->{source_ip};
 709                 $text .= "$cfg->{$source}->{$sync_name}->{source_pool}";
 710                 $text .= "$cfg->{$source}->{$sync_name}->{source_path}" if $cfg->{$source}->{$sync_name}->{source_path};
 711             }
 712             $text .= " -dest  ";
 713             $text .= "$cfg->{$source}->{$sync_name}->{dest_ip}:" if $cfg->{$source}->{$sync_name}->{dest_ip};
 714             $text .= "$cfg->{$source}->{$sync_name}->{dest_pool}";
 715             $text .= "$cfg->{$source}->{$sync_name}->{dest_path}" if $cfg->{$source}->{$sync_name}->{dest_path};
 716             $text .= " -name $sync_name ";
 717             $text .= " -limit $cfg->{$source}->{$sync_name}->{limit}" if $cfg->{$source}->{$sync_name}->{limit};
 718             $text .= " -maxsnap $cfg->{$source}->{$sync_name}->{maxsnap}" if $cfg->{$source}->{$sync_name}->{maxsnap};
 719             $text .= "\n";
 720         }
 721     }
 722     die "Can't write to cron\n" if (!print($fh $text));
 723     close($fh);
 724 }
 725
 726 sub get_disks {
 727     my ($target) = @_;
 728
 729     my $cmd = [];
 730     push @$cmd, 'ssh', "root\@$target->{ip}", '--', if $target->{ip};
 731
 732     if ($target->{vm_type} eq 'qemu') {
 733         push @$cmd, 'qm', 'config', $target->{vmid};
 734     } elsif ($target->{vm_type} eq 'lxc') {
 735         push @$cmd, 'pct', 'config', $target->{vmid};
 736     } else {
 737         die "VM Type unknown\n";
 738     }
 739
 740     my $res = run_cmd($cmd);
 741
 742     my $disks = parse_disks($res, $target->{ip}, $target->{vm_type});
 743
 744     return $disks;
 745 }
 746
 747 sub run_cmd {
 748     my ($cmd) = @_;
 749     print "Start CMD\n" if $DEBUG;
 750     print Dumper $cmd if $DEBUG;
 751     if (ref($cmd) eq 'ARRAY') {
 752         $cmd = join(' ', map { ref($_) ? $$_ : shell_quote($_) } @$cmd);
 753     }
 754     my $output = `$cmd 2>&1`;
 755
 756     die "COMMAND:\n\t$cmd\nGET ERROR:\n\t$output" if 0 != $?;
 757
 758     chomp($output);
 759     print Dumper $output if $DEBUG;
 760     print "END CMD\n" if $DEBUG;
 761     return $output;
 762 }
 763
 764 sub parse_disks {
 765     my ($text, $ip, $vm_type) = @_;
 766
 767     my $disks;
 768
 769     my $num = 0;
 770     while ($text && $text =~ s/^(.*?)(\n|$)//) {
 771         my $line = $1;
 772
 773         next if $line =~ /media=cdrom/;
 774         next if $line !~ m/^(?:((?:virtio|ide|scsi|sata|mp)\d+)|rootfs): /;
 775
 776         #QEMU if backup is not set include in  sync
 777         next if $vm_type eq 'qemu' && ($line =~ m/backup=(?i:0|no|off|false)/);
 778
 779         #LXC if backup is not set do no in sync
 780         next if $vm_type eq 'lxc' && ($line =~ m/^mp\d:/) && ($line !~ m/backup=(?i:1|yes|on|true)/);
 781
 782         my $disk = undef;
 783         my $stor = undef;
 784         if($line =~ m/^(?:(?:(?:virtio|ide|scsi|sata|mp)\d+)|rootfs): (.*)$/) {
 785             my @parameter = split(/,/,$1);
 786
 787             foreach my $opt (@parameter) {
 788                 if ($opt =~ m/^(?:file=|volume=)?([^:]+:)([A-Za-z0-9\-]+)$/){
 789                     $disk = $2;
 790                     $stor = $1;
 791                     last;
 792                 }
 793             }
 794         }
 795         if (!defined($disk) || !defined($stor)) {
 796             print "Disk: \"$line\" has no valid zfs dataset format and will be skipped\n";
 797             next;
 798         }
 799
 800         my $cmd = [];
 801         push @$cmd, 'ssh', "root\@$ip", '--' if $ip;
 802         push @$cmd, 'pvesm', 'path', "$stor$disk";
 803         my $path = run_cmd($cmd);
 804
 805         die "Get no path from pvesm path $stor$disk\n" if !$path;
 806
 807         if ($vm_type eq 'qemu' && $path =~ m/^\/dev\/zvol\/(\w+.*)(\/$disk)$/) {
 808
 809             my @array = split('/', $1);
 810             $disks->{$num}->{pool} = shift(@array);
 811             $disks->{$num}->{all} = $disks->{$num}->{pool};
 812             if (0 < @array) {
 813                 $disks->{$num}->{path} = join('/', @array);
 814                 $disks->{$num}->{all} .= "\/$disks->{$num}->{path}";
 815             }
 816             $disks->{$num}->{last_part} = $disk;
 817             $disks->{$num}->{all} .= "\/$disk";
 818
 819             $num++;
 820         } elsif ($vm_type eq 'lxc' && $path =~ m/^\/(\w+.+)(\/(\w+.*))*(\/$disk)$/) {
 821
 822             $disks->{$num}->{pool} = $1;
 823             $disks->{$num}->{all} = $disks->{$num}->{pool};
 824
 825             if ($2) {
 826                 $disks->{$num}->{path} = $3;
 827                 $disks->{$num}->{all} .= "\/$disks->{$num}->{path}";
 828             }
 829
 830             $disks->{$num}->{last_part} = $disk;
 831             $disks->{$num}->{all} .= "\/$disk";
 832
 833             $num++;
 834
 835         } else {
 836             die "ERROR: in path\n";
 837         }
 838     }
 839
 840     die "Vm include no disk on zfs.\n" if !$disks->{0};
 841     return $disks;
 842 }
 843
 844 sub snapshot_destroy {
 845     my ($source, $dest, $method, $snap) = @_;
 846
 847     my @zfscmd = ('zfs', 'destroy');
 848     my $snapshot = "$source->{all}\@$snap";
 849
 850     eval {
 851         if($source->{ip} && $method eq 'ssh'){
 852             run_cmd(['ssh', "root\@$source->{ip}", '--', @zfscmd, $snapshot]);
 853         } else {
 854             run_cmd([@zfscmd, $snapshot]);
 855         }
 856     };
 857     if (my $erro = $@) {
 858         warn "WARN: $erro";
 859     }
 860     if ($dest) {
 861         my @ssh = $dest->{ip} ? ('ssh', "root\@$dest->{ip}", '--') : ();
 862
 863         my $path = "$dest->{all}\/$source->{last_part}";
 864
 865         eval {
 866             run_cmd([@ssh, @zfscmd, "$path\@$snap"]);
 867         };
 868         if (my $erro = $@) {
 869             warn "WARN: $erro";
 870         }
 871     }
 872 }
 873
 874 sub snapshot_exist {
 875     my ($source , $dest, $method) = @_;
 876
 877     my $cmd = [];
 878     push @$cmd, 'ssh', "root\@$dest->{ip}", '--' if $dest->{ip};
 879     push @$cmd, 'zfs', 'list', '-rt', 'snapshot', '-Ho', 'name';
 880     push @$cmd, "$dest->{all}/$source->{last_part}\@$source->{old_snap}";
 881
 882     my $text = "";
 883     eval {$text =run_cmd($cmd);};
 884     if (my $erro =$@) {
 885         warn "WARN: $erro";
 886         return undef;
 887     }
 888
 889     while ($text && $text =~ s/^(.*?)(\n|$)//) {
 890         my $line =$1;
 891         return 1 if $line =~ m/^.*$source->{old_snap}$/;
 892     }
 893 }
 894
 895 sub send_image {
 896     my ($source, $dest, $param) = @_;
 897
 898     my $cmd = [];
 899
 900     push @$cmd, 'ssh', '-o', 'BatchMode=yes', "root\@$source->{ip}", '--' if $source->{ip};
 901     push @$cmd, 'zfs', 'send';
 902     push @$cmd, '-v' if $param->{verbose};
 903
 904     if($source->{last_snap} && snapshot_exist($source , $dest, $param->{method})) {
 905         push @$cmd, '-i', "$source->{all}\@$source->{last_snap}";
 906     }
 907     push @$cmd, '--', "$source->{all}\@$source->{new_snap}";
 908
 909     if ($param->{limit}){
 910         my $bwl = $param->{limit}*1024;
 911         push @$cmd, \'|', 'cstream', '-t', $bwl;
 912     }
 913     my $target = "$dest->{all}/$source->{last_part}";
 914     $target =~ s!/+!/!g;
 915
 916     push @$cmd, \'|';
 917         push @$cmd, 'ssh', '-o', 'BatchMode=yes', "root\@$dest->{ip}", '--' if $dest->{ip};
 918         push @$cmd, 'zfs', 'recv', '-F', '--';
 919         push @$cmd, "$target";
 920
 921         eval {
 922             run_cmd($cmd)
 923         };
 924
 925         if (my $erro = $@) {
 926             snapshot_destroy($source, undef, $param->{method}, $source->{new_snap});
 927             die $erro;
 928         };
 929     }
 930
 931
 932     sub send_config{
 933         my ($source, $dest, $method) = @_;
 934
 935         my $source_target = $source->{vm_type} eq 'qemu' ? "$QEMU_CONF/$source->{vmid}.conf": "$LXC_CONF/$source->{vmid}.conf";
 936         my $dest_target_new ="$source->{vmid}.conf.$source->{vm_type}.$source->{new_snap}";
 937
 938         my $config_dir = $dest->{last_part} ?  "${CONFIG_PATH}/$dest->{last_part}" : $CONFIG_PATH;
 939
 940         $dest_target_new = $config_dir.'/'.$dest_target_new;
 941
 942         if ($method eq 'ssh'){
 943             if ($dest->{ip} && $source->{ip}) {
 944                 run_cmd(['ssh', "root\@$dest->{ip}", '--', 'mkdir', '-p', '--', $config_dir]);
 945                 run_cmd(['scp', '--', "root\@[$source->{ip}]:$source_target", "root\@[$dest->{ip}]:$dest_target_new"]);
 946             } elsif ($dest->{ip}) {
 947                 run_cmd(['ssh', "root\@$dest->{ip}", '--', 'mkdir', '-p', '--', $config_dir]);
 948                 run_cmd(['scp', '--', $source_target, "root\@[$dest->{ip}]:$dest_target_new"]);
 949             } elsif ($source->{ip}) {
 950                 run_cmd(['mkdir', '-p', '--', $config_dir]);
 951                 run_cmd(['scp', '--', "root\@[$source->{ip}]:$source_target", $dest_target_new]);
 952             }
 953
 954             if ($source->{destroy}){
 955                 my $dest_target_old ="${config_dir}/$source->{vmid}.conf.$source->{vm_type}.$source->{old_snap}";
 956                 if($dest->{ip}){
 957                     run_cmd(['ssh', "root\@$dest->{ip}", '--', 'rm', '-f', '--', $dest_target_old]);
 958                 } else {
 959                     run_cmd(['rm', '-f', '--', $dest_target_old]);
 960                 }
 961             }
 962         } elsif ($method eq 'local') {
 963             run_cmd(['mkdir', '-p', '--', $config_dir]);
 964             run_cmd(['cp', $source_target, $dest_target_new]);
 965         }
 966     }
 967
 968     sub get_date {
 969         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) = localtime(time);
 970         my $datestamp = sprintf ("%04d-%02d-%02d_%02d:%02d:%02d", $year+1900, $mon+1, $mday, $hour, $min, $sec);
 971
 972         return $datestamp;
 973     }
 974
 975     sub status {
 976         my $cfg = read_cron();
 977
 978         my $status_list = sprintf("%-25s%-25s%-10s\n", "SOURCE", "NAME", "STATUS");
 979
 980         my $states = read_state();
 981
 982         foreach my $source (sort keys%{$cfg}) {
 983             foreach my $sync_name (sort keys%{$cfg->{$source}}) {
 984                 $status_list .= sprintf("%-25s", cut_target_width($source, 25));
 985                 $status_list .= sprintf("%-25s", cut_target_width($sync_name, 25));
 986                 $status_list .= "$states->{$source}->{$sync_name}->{state}\n";
 987             }
 988         }
 989
 990         return $status_list;
 991     }
 992
 993     sub enable_job {
 994         my ($param) = @_;
 995
 996         my $job = get_job($param);
 997         $job->{state} = "ok";
 998         update_state($job);
 999         update_cron($job);
1000     }
1001
1002     sub disable_job {
1003         my ($param) = @_;
1004
1005         my $job = get_job($param);
1006         $job->{state} = "stopped";
1007         update_state($job);
1008         update_cron($job);
1009     }
1010
1011     my $command = $ARGV[0];
1012
1013     my $commands = {'destroy' => 1,
1014                     'create' => 1,
1015                     'sync' => 1,
1016                     'list' => 1,
1017                     'status' => 1,
1018                     'help' => 1,
1019                     'enable' => 1,
1020                     'disable' => 1};
1021
1022     if (!$command || !$commands->{$command}) {
1023         usage();
1024         die "\n";
1025     }
1026
1027     my $help_sync = << EOF$PROGNAME sync -dest <string> -source <string> [OPTIONS]\n
1028
1029         will sync one time
1030
1031         -dest      string
1032
1033                 the destination target is like [IP:]<Pool>[/Path]
1034
1035         -limit     integer
1036
1037                 max sync speed in kBytes/s, default unlimited
1038
1039         -maxsnap   integer
1040
1041                 how much snapshots will be kept before get erased, default 1
1042
1043         -name      string
1044
1045                 name of the sync job, if not set it is default.
1046                 It is only necessary if scheduler allready contains this source.
1047
1048         -source    string
1049
1050                 the source can be an <VMID> or [IP:]<ZFSPool>[/Path]
1051
1052         -verbose   boolean
1053
1054                 print out the sync progress.
1055 EOF
1056
1057     my $help_create = << EOF$PROGNAME create -dest <string> -source <string> [OPTIONS]
1058
1059         Create a sync Job
1060
1061         -dest      string
1062
1063                 the destination target is like [IP]:<Pool>[/Path]
1064
1065         -limit     integer
1066
1067                 max sync speed in kBytes/s, default unlimited
1068
1069         -maxsnap   string
1070
1071                 how much snapshots will be kept before get erased, default 1
1072
1073         -name      string
1074
1075                 name of the sync job, if not set it is default
1076
1077         -skip      boolean
1078
1079                 if this flag is set it will skip the first sync
1080
1081         -source    string
1082
1083                 the source can be an <VMID> or [IP:]<ZFSPool>[/Path]
1084 EOF
1085
1086     my $help_destroy = << EOF$PROGNAME destroy -source <string> [OPTIONS]
1087
1088         remove a sync Job from the scheduler
1089
1090         -name      string
1091
1092                 name of the sync job, if not set it is default
1093
1094         -source    string
1095
1096                 the source can be an  <VMID> or [IP:]<ZFSPool>[/Path]
1097 EOF
1098
1099     my $help_help = << EOF$PROGNAME help <cmd> [OPTIONS]
1100
1101         Get help about specified command.
1102
1103         <cmd>      string
1104
1105                 Command name
1106
1107         -verbose   boolean
1108
1109                 Verbose output format.
1110 EOF
1111
1112     my $help_list = << EOF$PROGNAME list
1113
1114         Get a List of all scheduled Sync Jobs
1115 EOF
1116
1117     my $help_status = << EOF$PROGNAME status
1118
1119         Get the status of all scheduled Sync Jobs
1120 EOF
1121
1122     my $help_enable = << EOF$PROGNAME enable -source <string> [OPTIONS]
1123
1124         enable a syncjob and reset error
1125
1126         -name      string
1127
1128                 name of the sync job, if not set it is default
1129
1130         -source    string
1131
1132                 the source can be an  <VMID> or [IP:]<ZFSPool>[/Path]
1133 EOF
1134
1135     my $help_disable = << EOF$PROGNAME disable -source <string> [OPTIONS]
1136
1137         pause a sync job
1138
1139         -name      string
1140
1141                 name of the sync job, if not set it is default
1142
1143         -source    string
1144
1145                 the source can be an  <VMID> or [IP:]<ZFSPool>[/Path]
1146 EOF
1147
1148     sub help {
1149         my ($command) = @_;
1150
1151         if ($command eq 'help') {
1152             die "$help_help\n";
1153
1154         } elsif ($command eq 'sync') {
1155             die "$help_sync\n";
1156
1157         } elsif ($command eq 'destroy') {
1158             die "$help_destroy\n";
1159
1160         } elsif ($command eq 'create') {
1161             die "$help_create\n";
1162
1163         } elsif ($command eq 'list') {
1164             die "$help_list\n";
1165
1166         } elsif ($command eq 'status') {
1167             die "$help_status\n";
1168
1169         } elsif ($command eq 'enable') {
1170             die "$help_enable\n";
1171
1172         } elsif ($command eq 'disable') {
1173             die "$help_disable\n";
1174
1175         }
1176
1177     }
1178
1179     my @arg = @ARGV;
1180     my $param = parse_argv(@arg);
1181
1182     if ($command eq 'destroy') {
1183         die "$help_destroy\n" if !$param->{source};
1184
1185         check_target($param->{source});
1186         destroy_job($param);
1187
1188     } elsif ($command eq 'sync') {
1189         die "$help_sync\n" if !$param->{source} || !$param->{dest};
1190
1191         check_target($param->{source});
1192         check_target($param->{dest});
1193         sync($param);
1194
1195     } elsif ($command eq 'create') {
1196         die "$help_create\n" if !$param->{source} || !$param->{dest};
1197
1198         check_target($param->{source});
1199         check_target($param->{dest});
1200         init($param);
1201
1202     } elsif ($command eq 'status') {
1203         print status();
1204
1205     } elsif ($command eq 'list') {
1206         print list();
1207
1208     } elsif ($command eq 'help') {
1209         my $help_command = $ARGV[1];
1210
1211         if ($help_command && $commands->{$help_command}) {
1212             print help($help_command);
1213
1214         }
1215         if ($param->{verbose} == 1){
1216             exec("man $PROGNAME");
1217
1218         } else {
1219             usage(1);
1220
1221         }
1222
1223     } elsif ($command eq 'enable') {
1224         die "$help_enable\n" if !$param->{source};
1225
1226         check_target($param->{source});
1227         enable_job($param);
1228
1229     } elsif ($command eq 'disable') {
1230         die "$help_disable\n" if !$param->{source};
1231
1232         check_target($param->{source});
1233         disable_job($param);
1234
1235     }
1236
1237     sub usage {
1238         my ($help) = @_;
1239
1240         print("ERROR:\tno command specified\n") if !$help;
1241         print("USAGE:\t$PROGNAME <COMMAND> [ARGS] [OPTIONS]\n");
1242         print("\t$PROGNAME help [<cmd>] [OPTIONS]\n\n");
1243         print("\t$PROGNAME create -dest <string> -source <string> [OPTIONS]\n");
1244         print("\t$PROGNAME destroy -source <string> [OPTIONS]\n");
1245         print("\t$PROGNAME disable -source <string> [OPTIONS]\n");
1246         print("\t$PROGNAME enable -source <string> [OPTIONS]\n");
1247         print("\t$PROGNAME list\n");
1248         print("\t$PROGNAME status\n");
1249         print("\t$PROGNAME sync -dest <string> -source <string> [OPTIONS]\n");
1250     }
1251
1252     sub check_target {
1253         my ($target) = @_;
1254         parse_target($target);
1255     }
1256
1257 __END__
1258
1259 =head1 NAME
1260
1261 pve-zsync - PVE ZFS Replication Manager
1262
1263 =head1 SYNOPSIS
1264
1265 pve-zsync <COMMAND> [ARGS] [OPTIONS]
1266
1267 pve-zsync help <cmd> [OPTIONS]
1268
1269         Get help about specified command.
1270
1271         <cmd>      string
1272
1273                 Command name
1274
1275         -verbose   boolean
1276
1277                 Verbose output format.
1278
1279 pve-zsync create -dest <string> -source <string> [OPTIONS]
1280
1281         Create a sync Job
1282
1283         -dest      string
1284
1285                 the destination target is like [IP]:<Pool>[/Path]
1286
1287         -limit     integer
1288
1289                 max sync speed in kBytes/s, default unlimited
1290
1291         -maxsnap   string
1292
1293                 how much snapshots will be kept before get erased, default 1
1294
1295         -name      string
1296
1297                 name of the sync job, if not set it is default
1298
1299         -skip      boolean
1300
1301                 if this flag is set it will skip the first sync
1302
1303         -source    string
1304
1305                 the source can be an <VMID> or [IP:]<ZFSPool>[/Path]
1306
1307 pve-zsync destroy -source <string> [OPTIONS]
1308
1309         remove a sync Job from the scheduler
1310
1311         -name      string
1312
1313                 name of the sync job, if not set it is default
1314
1315         -source    string
1316
1317                 the source can be an  <VMID> or [IP:]<ZFSPool>[/Path]
1318
1319 pve-zsync disable -source <string> [OPTIONS]
1320
1321         pause a sync job
1322
1323         -name      string
1324
1325                 name of the sync job, if not set it is default
1326
1327         -source    string
1328
1329                 the source can be an  <VMID> or [IP:]<ZFSPool>[/Path]
1330
1331 pve-zsync enable -source <string> [OPTIONS]
1332
1333         enable a syncjob and reset error
1334
1335         -name      string
1336
1337                 name of the sync job, if not set it is default
1338
1339         -source    string
1340
1341                 the source can be an  <VMID> or [IP:]<ZFSPool>[/Path]
1342 pve-zsync list
1343
1344         Get a List of all scheduled Sync Jobs
1345
1346 pve-zsync status
1347
1348         Get the status of all scheduled Sync Jobs
1349
1350 pve-zsync sync -dest <string> -source <string> [OPTIONS]
1351
1352         will sync one time
1353
1354         -dest      string
1355
1356                 the destination target is like [IP:]<Pool>[/Path]
1357
1358         -limit     integer
1359
1360                 max sync speed in kBytes/s, default unlimited
1361
1362         -maxsnap   integer
1363
1364                 how much snapshots will be kept before get erased, default 1
1365
1366         -name      string
1367
1368                 name of the sync job, if not set it is default.
1369                 It is only necessary if scheduler allready contains this source.
1370
1371         -source    string
1372
1373                 the source can be an <VMID> or [IP:]<ZFSPool>[/Path]
1374
1375         -verbose   boolean
1376
1377                 print out the sync progress.
1378
1379 =head1 DESCRIPTION
1380
1381 This Tool helps you to sync your VM or directory which stored on ZFS between 2 servers.
1382 This tool also has the capability to add jobs to cron so the sync will be automatically done.
1383 The default syncing interval is set to 15 min, if you want to change this value you can do this in /etc/cron.d/pve-zsync.
1384 To config cron see man crontab.
1385
1386 =head2 PVE ZFS Storage sync Tool
1387
1388 This Tool can get remote pool on other PVE or send Pool to others ZFS machines
1389
1390 =head1 EXAMPLES
1391
1392 add sync job from local VM to remote ZFS Server
1393 pve-zsync create -source=100 -dest=192.168.1.2:zfspool
1394
1395 =head1 IMPORTANT FILES
1396
1397 Cron jobs and config are stored at                      /etc/cron.d/pve-zsync
1398
1399 The VM config get copied on the destination machine to  /var/lib/pve-zsync/
1400
1401 =head1 COPYRIGHT AND DISCLAIMER
1402
1403 Copyright (C) 2007-2015 Proxmox Server Solutions GmbH
1404
1405 This program is free software: you can redistribute it and/or modify it
1406 under the terms of the GNU Affero General Public License as published
1407 by the Free Software Foundation, either version 3 of the License, or
1408 (at your option) any later version.
1409
1410 This program is distributed in the hope that it will be useful, but
1411 WITHOUT ANY WARRANTY; without even the implied warranty of
1412 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
1413 Affero General Public License for more details.
1414
1415 You should have received a copy of the GNU Affero General Public
1416 License along with this program.  If not, see
1417 <http://www.gnu.org/licenses/>.