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 =~ /cdrom|none/;
 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 = $1;
 791                     last;
 792                 }
 793             }
 794             if (!defined($disk) || !defined($stor)) {
 795                 print "Disk: \"$line\" has no valid zfs dataset format and will not include in pve-sync\n";
 796                 next;
 797             }
 798         } else {
 799             print "Disk: \"$line\" has no valid zfs dataset format and will not include in pve-sync\n";
 800             next;
 801         }
 802
 803         my $cmd = [];
 804         push @$cmd, 'ssh', "root\@$ip", '--' if $ip;
 805         push @$cmd, 'pvesm', 'path', "$stor$disk";
 806         my $path = run_cmd($cmd);
 807
 808         die "Get no path from pvesm path $stor$disk\n" if !$path;
 809
 810         if ($vm_type eq 'qemu' && $path =~ m/^\/dev\/zvol\/(\w+.*)(\/$disk)$/) {
 811
 812             my @array = split('/', $1);
 813             $disks->{$num}->{pool} = shift(@array);
 814             $disks->{$num}->{all} = $disks->{$num}->{pool};
 815             if (0 < @array) {
 816                 $disks->{$num}->{path} = join('/', @array);
 817                 $disks->{$num}->{all} .= "\/$disks->{$num}->{path}";
 818             }
 819             $disks->{$num}->{last_part} = $disk;
 820             $disks->{$num}->{all} .= "\/$disk";
 821
 822             $num++;
 823         } elsif ($vm_type eq 'lxc' && $path =~ m/^\/(\w+.+)(\/(\w+.*))*(\/$disk)$/) {
 824
 825             $disks->{$num}->{pool} = $1;
 826             $disks->{$num}->{all} = $disks->{$num}->{pool};
 827
 828             if ($2) {
 829                 $disks->{$num}->{path} = $3;
 830                 $disks->{$num}->{all} .= "\/$disks->{$num}->{path}";
 831             }
 832
 833             $disks->{$num}->{last_part} = $disk;
 834             $disks->{$num}->{all} .= "\/$disk";
 835
 836             $num++;
 837
 838         } else {
 839             die "ERROR: in path\n";
 840         }
 841     }
 842
 843     die "Vm include no disk on zfs.\n" if !$disks->{0};
 844     return $disks;
 845 }
 846
 847 sub snapshot_destroy {
 848     my ($source, $dest, $method, $snap) = @_;
 849
 850     my @zfscmd = ('zfs', 'destroy');
 851     my $snapshot = "$source->{all}\@$snap";
 852
 853     eval {
 854         if($source->{ip} && $method eq 'ssh'){
 855             run_cmd(['ssh', "root\@$source->{ip}", '--', @zfscmd, $snapshot]);
 856         } else {
 857             run_cmd([@zfscmd, $snapshot]);
 858         }
 859     };
 860     if (my $erro = $@) {
 861         warn "WARN: $erro";
 862     }
 863     if ($dest) {
 864         my @ssh = $dest->{ip} ? ('ssh', "root\@$dest->{ip}", '--') : ();
 865
 866         my $path = "$dest->{all}\/$source->{last_part}";
 867
 868         eval {
 869             run_cmd([@ssh, @zfscmd, "$path\@$snap"]);
 870         };
 871         if (my $erro = $@) {
 872             warn "WARN: $erro";
 873         }
 874     }
 875 }
 876
 877 sub snapshot_exist {
 878     my ($source , $dest, $method) = @_;
 879
 880     my $cmd = [];
 881     push @$cmd, 'ssh', "root\@$dest->{ip}", '--' if $dest->{ip};
 882     push @$cmd, 'zfs', 'list', '-rt', 'snapshot', '-Ho', 'name';
 883     push @$cmd, "$dest->{all}/$source->{last_part}\@$source->{old_snap}";
 884
 885     my $text = "";
 886     eval {$text =run_cmd($cmd);};
 887     if (my $erro =$@) {
 888         warn "WARN: $erro";
 889         return undef;
 890     }
 891
 892     while ($text && $text =~ s/^(.*?)(\n|$)//) {
 893         my $line =$1;
 894         return 1 if $line =~ m/^.*$source->{old_snap}$/;
 895     }
 896 }
 897
 898 sub send_image {
 899     my ($source, $dest, $param) = @_;
 900
 901     my $cmd = [];
 902
 903     push @$cmd, 'ssh', '-o', 'BatchMode=yes', "root\@$source->{ip}", '--' if $source->{ip};
 904     push @$cmd, 'zfs', 'send';
 905     push @$cmd, '-v' if $param->{verbose};
 906
 907     if($source->{last_snap} && snapshot_exist($source , $dest, $param->{method})) {
 908         push @$cmd, '-i', "$source->{all}\@$source->{last_snap}";
 909     }
 910     push @$cmd, '--', "$source->{all}\@$source->{new_snap}";
 911
 912     if ($param->{limit}){
 913         my $bwl = $param->{limit}*1024;
 914         push @$cmd, \'|', 'cstream', '-t', $bwl;
 915     }
 916     my $target = "$dest->{all}/$source->{last_part}";
 917     $target =~ s!/+!/!g;
 918
 919     push @$cmd, \'|';
 920         push @$cmd, 'ssh', '-o', 'BatchMode=yes', "root\@$dest->{ip}", '--' if $dest->{ip};
 921         push @$cmd, 'zfs', 'recv', '-F', '--';
 922         push @$cmd, "$target";
 923
 924         eval {
 925             run_cmd($cmd)
 926         };
 927
 928         if (my $erro = $@) {
 929             snapshot_destroy($source, undef, $param->{method}, $source->{new_snap});
 930             die $erro;
 931         };
 932     }
 933
 934
 935     sub send_config{
 936         my ($source, $dest, $method) = @_;
 937
 938         my $source_target = $source->{vm_type} eq 'qemu' ? "$QEMU_CONF/$source->{vmid}.conf": "$LXC_CONF/$source->{vmid}.conf";
 939         my $dest_target_new ="$source->{vmid}.conf.$source->{vm_type}.$source->{new_snap}";
 940
 941         my $config_dir = $dest->{last_part} ?  "${CONFIG_PATH}/$dest->{last_part}" : $CONFIG_PATH;
 942
 943         $dest_target_new = $config_dir.'/'.$dest_target_new;
 944
 945         if ($method eq 'ssh'){
 946             if ($dest->{ip} && $source->{ip}) {
 947                 run_cmd(['ssh', "root\@$dest->{ip}", '--', 'mkdir', '-p', '--', $config_dir]);
 948                 run_cmd(['scp', '--', "root\@[$source->{ip}]:$source_target", "root\@[$dest->{ip}]:$dest_target_new"]);
 949             } elsif ($dest->{ip}) {
 950                 run_cmd(['ssh', "root\@$dest->{ip}", '--', 'mkdir', '-p', '--', $config_dir]);
 951                 run_cmd(['scp', '--', $source_target, "root\@[$dest->{ip}]:$dest_target_new"]);
 952             } elsif ($source->{ip}) {
 953                 run_cmd(['mkdir', '-p', '--', $config_dir]);
 954                 run_cmd(['scp', '--', "root\@$source->{ip}:$source_target", $dest_target_new]);
 955             }
 956
 957             if ($source->{destroy}){
 958                 my $dest_target_old ="${config_dir}/$source->{vmid}.conf.$source->{vm_type}.$source->{old_snap}";
 959                 if($dest->{ip}){
 960                     run_cmd(['ssh', "root\@$dest->{ip}", '--', 'rm', '-f', '--', $dest_target_old]);
 961                 } else {
 962                     run_cmd(['rm', '-f', '--', $dest_target_old]);
 963                 }
 964             }
 965         } elsif ($method eq 'local') {
 966             run_cmd(['mkdir', '-p', '--', $config_dir]);
 967             run_cmd(['cp', $source_target, $dest_target_new]);
 968         }
 969     }
 970
 971     sub get_date {
 972         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst) = localtime(time);
 973         my $datestamp = sprintf ("%04d-%02d-%02d_%02d:%02d:%02d", $year+1900, $mon+1, $mday, $hour, $min, $sec);
 974
 975         return $datestamp;
 976     }
 977
 978     sub status {
 979         my $cfg = read_cron();
 980
 981         my $status_list = sprintf("%-25s%-25s%-10s\n", "SOURCE", "NAME", "STATUS");
 982
 983         my $states = read_state();
 984
 985         foreach my $source (sort keys%{$cfg}) {
 986             foreach my $sync_name (sort keys%{$cfg->{$source}}) {
 987                 $status_list .= sprintf("%-25s", cut_target_width($source, 25));
 988                 $status_list .= sprintf("%-25s", cut_target_width($sync_name, 25));
 989                 $status_list .= "$states->{$source}->{$sync_name}->{state}\n";
 990             }
 991         }
 992
 993         return $status_list;
 994     }
 995
 996     sub enable_job {
 997         my ($param) = @_;
 998
 999         my $job = get_job($param);
1000         $job->{state} = "ok";
1001         update_state($job);
1002         update_cron($job);
1003     }
1004
1005     sub disable_job {
1006         my ($param) = @_;
1007
1008         my $job = get_job($param);
1009         $job->{state} = "stopped";
1010         update_state($job);
1011         update_cron($job);
1012     }
1013
1014     my $command = $ARGV[0];
1015
1016     my $commands = {'destroy' => 1,
1017                     'create' => 1,
1018                     'sync' => 1,
1019                     'list' => 1,
1020                     'status' => 1,
1021                     'help' => 1,
1022                     'enable' => 1,
1023                     'disable' => 1};
1024
1025     if (!$command || !$commands->{$command}) {
1026         usage();
1027         die "\n";
1028     }
1029
1030     my $help_sync = "$PROGNAME sync -dest <string> -source <string> [OPTIONS]\n
1031 \twill sync one time\n
1032 \t-dest\tstring\n
1033 \t\tthe destination target is like [IP:]<Pool>[/Path]\n
1034 \t-limit\tinteger\n
1035 \t\tmax sync speed in kBytes/s, default unlimited\n
1036 \t-maxsnap\tinteger\n
1037 \t\thow much snapshots will be kept before get erased, default 1/n
1038 \t-name\tstring\n
1039 \t\tname of the sync job, if not set it is default.
1040 \tIt is only necessary if scheduler allready contains this source.\n
1041 \t-source\tstring\n
1042 \t\tthe source can be an <VMID> or [IP:]<ZFSPool>[/Path]\n";
1043
1044     my $help_create = "$PROGNAME create -dest <string> -source <string> [OPTIONS]/n
1045 \tCreate a sync Job\n
1046 \t-dest\tstring\n
1047 \t\tthe destination target is like [IP]:<Pool>[/Path]\n
1048 \t-limit\tinteger\n
1049 \t\tmax sync speed in kBytes/s, default unlimited\n
1050 \t-maxsnap\tstring\n
1051 \t\thow much snapshots will be kept before get erased, default 1\n
1052 \t-name\tstring\n
1053 \t\tname of the sync job, if not set it is default\n
1054 \t-skip\tboolean\n
1055 \t\tif this flag is set it will skip the first sync\n
1056 \t-source\tstring\n
1057 \t\tthe source can be an <VMID> or [IP:]<ZFSPool>[/Path]\n";
1058
1059     my $help_destroy = "$PROGNAME destroy -source <string> [OPTIONS]\n
1060 \tremove a sync Job from the scheduler\n
1061 \t-name\tstring\n
1062 \t\tname of the sync job, if not set it is default\n
1063 \t-source\tstring\n
1064 \t\tthe source can be an  <VMID> or [IP:]<ZFSPool>[/Path]\n";
1065
1066     my $help_help = "$PROGNAME help <cmd> [OPTIONS]\n
1067 \tGet help about specified command.\n
1068 \t<cmd>\tstring\n
1069 \t\tCommand name\n
1070 \t-verbose\tboolean\n
1071 \t\tVerbose output format.\n";
1072
1073     my $help_list = "$PROGNAME list\n
1074 \tGet a List of all scheduled Sync Jobs\n";
1075
1076     my $help_status = "$PROGNAME status\n
1077 \tGet the status of all scheduled Sync Jobs\n";
1078
1079     my $help_enable = "$PROGNAME enable -source <string> [OPTIONS]\n
1080 \tenable a syncjob and reset error\n
1081 \t-name\tstring\n
1082 \t\tname of the sync job, if not set it is default\n
1083 \t-source\tstring\n
1084 \t\tthe source can be an  <VMID> or [IP:]<ZFSPool>[/Path]\n";
1085
1086     my $help_disable = "$PROGNAME disable -source <string> [OPTIONS]\n
1087 \tpause a syncjob\n
1088 \t-name\tstring\n
1089 \t\tname of the sync job, if not set it is default\n
1090 \t-source\tstring\n
1091 \t\tthe source can be an  <VMID> or [IP:]<ZFSPool>[/Path]\n";
1092
1093     sub help {
1094         my ($command) = @_;
1095
1096         if ($command eq 'help') {
1097             die "$help_help\n";
1098
1099         } elsif ($command eq 'sync') {
1100             die "$help_sync\n";
1101
1102         } elsif ($command eq 'destroy') {
1103             die "$help_destroy\n";
1104
1105         } elsif ($command eq 'create') {
1106             die "$help_create\n";
1107
1108         } elsif ($command eq 'list') {
1109             die "$help_list\n";
1110
1111         } elsif ($command eq 'status') {
1112             die "$help_status\n";
1113
1114         } elsif ($command eq 'enable') {
1115             die "$help_enable\n";
1116
1117         } elsif ($command eq 'disable') {
1118             die "$help_disable\n";
1119
1120         }
1121
1122     }
1123
1124     my @arg = @ARGV;
1125     my $param = parse_argv(@arg);
1126
1127     if ($command eq 'destroy') {
1128         die "$help_destroy\n" if !$param->{source};
1129
1130         check_target($param->{source});
1131         destroy_job($param);
1132
1133     } elsif ($command eq 'sync') {
1134         die "$help_sync\n" if !$param->{source} || !$param->{dest};
1135
1136         check_target($param->{source});
1137         check_target($param->{dest});
1138         sync($param);
1139
1140     } elsif ($command eq 'create') {
1141         die "$help_create\n" if !$param->{source} || !$param->{dest};
1142
1143         check_target($param->{source});
1144         check_target($param->{dest});
1145         init($param);
1146
1147     } elsif ($command eq 'status') {
1148         print status();
1149
1150     } elsif ($command eq 'list') {
1151         print list();
1152
1153     } elsif ($command eq 'help') {
1154         my $help_command = $ARGV[1];
1155
1156         if ($help_command && $commands->{$help_command}) {
1157             print help($help_command);
1158
1159         }
1160         if ($param->{verbose} == 1){
1161             exec("man $PROGNAME");
1162
1163         } else {
1164             usage(1);
1165
1166         }
1167
1168     } elsif ($command eq 'enable') {
1169         die "$help_enable\n" if !$param->{source};
1170
1171         check_target($param->{source});
1172         enable_job($param);
1173
1174     } elsif ($command eq 'disable') {
1175         die "$help_disable\n" if !$param->{source};
1176
1177         check_target($param->{source});
1178         disable_job($param);
1179
1180     }
1181
1182     sub usage {
1183         my ($help) = @_;
1184
1185         print("ERROR:\tno command specified\n") if !$help;
1186         print("USAGE:\t$PROGNAME <COMMAND> [ARGS] [OPTIONS]\n");
1187         print("\t$PROGNAME help [<cmd>] [OPTIONS]\n\n");
1188         print("\t$PROGNAME create -dest <string> -source <string> [OPTIONS]\n");
1189         print("\t$PROGNAME destroy -source <string> [OPTIONS]\n");
1190         print("\t$PROGNAME disable -source <string> [OPTIONS]\n");
1191         print("\t$PROGNAME enable -source <string> [OPTIONS]\n");
1192         print("\t$PROGNAME list\n");
1193         print("\t$PROGNAME status\n");
1194         print("\t$PROGNAME sync -dest <string> -source <string> [OPTIONS]\n");
1195     }
1196
1197     sub check_target {
1198         my ($target) = @_;
1199         parse_target($target);
1200     }
1201
1202 __END__
1203
1204 =head1 NAME
1205
1206 pve-zsync - PVE ZFS Replication Manager
1207
1208 =head1 SYNOPSIS
1209
1210 pve-zsync <COMMAND> [ARGS] [OPTIONS]
1211
1212 pve-zsync help <cmd> [OPTIONS]
1213
1214         Get help about specified command.
1215
1216         <cmd>      string
1217
1218                 Command name
1219
1220         -verbose   boolean
1221
1222                 Verbose output format.
1223
1224 pve-zsync create -dest <string> -source <string> [OPTIONS]
1225
1226         Create a sync Job
1227
1228         -dest      string
1229
1230                 the destination target is like [IP]:<Pool>[/Path]
1231
1232         -limit     integer
1233
1234                 max sync speed in kBytes/s, default unlimited
1235
1236         -maxsnap   string
1237
1238                 how much snapshots will be kept before get erased, default 1
1239
1240         -name      string
1241
1242                 name of the sync job, if not set it is default
1243
1244         -skip      boolean
1245
1246                 if this flag is set it will skip the first sync
1247
1248         -source    string
1249
1250                 the source can be an <VMID> or [IP:]<ZFSPool>[/Path]
1251
1252 pve-zsync destroy -source <string> [OPTIONS]
1253
1254         remove a sync Job from the scheduler
1255
1256         -name      string
1257
1258                 name of the sync job, if not set it is default
1259
1260         -source    string
1261
1262                 the source can be an  <VMID> or [IP:]<ZFSPool>[/Path]
1263
1264 pve-zsync disable -source <string> [OPTIONS]
1265
1266         pause a sync job
1267
1268         -name      string
1269
1270                 name of the sync job, if not set it is default
1271
1272         -source    string
1273
1274                 the source can be an  <VMID> or [IP:]<ZFSPool>[/Path]
1275
1276 pve-zsync enable -source <string> [OPTIONS]
1277
1278         enable a syncjob and reset error
1279
1280         -name      string
1281
1282                 name of the sync job, if not set it is default
1283
1284         -source    string
1285
1286                 the source can be an  <VMID> or [IP:]<ZFSPool>[/Path]
1287 pve-zsync list
1288
1289         Get a List of all scheduled Sync Jobs
1290
1291 pve-zsync status
1292
1293         Get the status of all scheduled Sync Jobs
1294
1295 pve-zsync sync -dest <string> -source <string> [OPTIONS]
1296
1297         will sync one time
1298
1299         -dest      string
1300
1301                 the destination target is like [IP:]<Pool>[/Path]
1302
1303         -limit     integer
1304
1305                 max sync speed in kBytes/s, default unlimited
1306
1307         -maxsnap   integer
1308
1309                 how much snapshots will be kept before get erased, default 1
1310
1311         -name      string
1312
1313                 name of the sync job, if not set it is default.
1314                 It is only necessary if scheduler allready contains this source.
1315
1316         -source    string
1317
1318                 the source can be an <VMID> or [IP:]<ZFSPool>[/Path]
1319
1320 =head1 DESCRIPTION
1321
1322 This Tool helps you to sync your VM or directory which stored on ZFS between 2 servers.
1323 This tool also has the capability to add jobs to cron so the sync will be automatically done.
1324 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.
1325 To config cron see man crontab.
1326
1327 =head2 PVE ZFS Storage sync Tool
1328
1329 This Tool can get remote pool on other PVE or send Pool to others ZFS machines
1330
1331 =head1 EXAMPLES
1332
1333 add sync job from local VM to remote ZFS Server
1334 pve-zsync create -source=100 -dest=192.168.1.2:zfspool
1335
1336 =head1 IMPORTANT FILES
1337
1338 Cron jobs and config are stored at                      /etc/cron.d/pve-zsync
1339
1340 The VM config get copied on the destination machine to  /var/lib/pve-zsync/
1341
1342 =head1 COPYRIGHT AND DISCLAIMER
1343
1344 Copyright (C) 2007-2015 Proxmox Server Solutions GmbH
1345
1346 This program is free software: you can redistribute it and/or modify it
1347 under the terms of the GNU Affero General Public License as published
1348 by the Free Software Foundation, either version 3 of the License, or
1349 (at your option) any later version.
1350
1351 This program is distributed in the hope that it will be useful, but
1352 WITHOUT ANY WARRANTY; without even the implied warranty of
1353 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
1354 Affero General Public License for more details.
1355
1356 You should have received a copy of the GNU Affero General Public
1357 License along with this program.  If not, see
1358 <http://www.gnu.org/licenses/>.