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Commit | Line | Data |
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a6538c1e DM |
1 | package PVE::Replication; |
2 | ||
3 | use warnings; | |
4 | use strict; | |
5 | use Data::Dumper; | |
6 | use JSON; | |
7 | use Time::HiRes qw(gettimeofday tv_interval); | |
93c3695b | 8 | use POSIX qw(strftime); |
a6538c1e DM |
9 | |
10 | use PVE::INotify; | |
11 | use PVE::ProcFSTools; | |
12 | use PVE::Tools; | |
13 | use PVE::Cluster; | |
96c08a9d | 14 | use PVE::DataCenterConfig; |
a6538c1e DM |
15 | use PVE::Storage; |
16 | use PVE::GuestHelpers; | |
17 | use PVE::ReplicationConfig; | |
18 | use PVE::ReplicationState; | |
0c85474f | 19 | use PVE::SSHInfo; |
a6538c1e DM |
20 | |
21 | ||
22 | # regression tests should overwrite this | |
23 | sub get_log_time { | |
24 | ||
93c3695b | 25 | return strftime("%F %H:%M:%S", localtime); |
a6538c1e DM |
26 | } |
27 | ||
e4f63016 DM |
28 | # Find common base replication snapshot, available on local and remote side. |
29 | # Note: this also removes stale replication snapshots | |
30 | sub find_common_replication_snapshot { | |
c05dc937 FE |
31 | my ($ssh_info, $jobid, $vmid, $storecfg, $volumes, $storeid_list, $last_sync, $guest_conf, $logfunc) = @_; |
32 | ||
33 | my $parent_snapname = $guest_conf->{parent}; | |
e4f63016 DM |
34 | |
35 | my $last_sync_snapname = | |
36 | PVE::ReplicationState::replication_snapshot_name($jobid, $last_sync); | |
37 | ||
38 | # test if we have a replication_ snapshot from last sync | |
39 | # and remove all other/stale replication snapshots | |
40 | ||
fbbeb872 FE |
41 | my $last_snapshots = |
42 | prepare($storecfg, $volumes, $jobid, $last_sync, $parent_snapname, $logfunc); | |
e4f63016 DM |
43 | |
44 | # prepare remote side | |
45 | my $remote_snapshots = remote_prepare_local_job( | |
fbbeb872 FE |
46 | $ssh_info, |
47 | $jobid, | |
48 | $vmid, | |
49 | $volumes, | |
50 | $storeid_list, | |
51 | $last_sync, | |
52 | $parent_snapname, | |
53 | 0, | |
54 | $logfunc, | |
55 | ); | |
e4f63016 DM |
56 | |
57 | my $base_snapshots = {}; | |
58 | ||
59 | foreach my $volid (@$volumes) { | |
e4f63016 DM |
60 | if (defined($last_snapshots->{$volid}) && defined($remote_snapshots->{$volid})) { |
61 | if ($last_snapshots->{$volid}->{$last_sync_snapname} && | |
62 | $remote_snapshots->{$volid}->{$last_sync_snapname}) { | |
63 | $base_snapshots->{$volid} = $last_sync_snapname; | |
64 | } elsif (defined($parent_snapname) && | |
65 | ($last_snapshots->{$volid}->{$parent_snapname} && | |
66 | $remote_snapshots->{$volid}->{$parent_snapname})) { | |
67 | $base_snapshots->{$volid} = $parent_snapname; | |
d5b277dc WL |
68 | } elsif ($last_sync == 0) { |
69 | my @desc_sorted_snap = | |
70 | map { $_->[1] } sort { $b->[0] <=> $a->[0] } | |
71 | map { [ ($_ =~ /__replicate_\Q$jobid\E_(\d+)_/)[0] || 0, $_ ] } | |
72 | keys %{$remote_snapshots->{$volid}}; | |
73 | ||
74 | foreach my $remote_snap (@desc_sorted_snap) { | |
75 | if (defined($last_snapshots->{$volid}->{$remote_snap})) { | |
76 | $base_snapshots->{$volid} = $remote_snap; | |
77 | last; | |
78 | } | |
79 | } | |
80 | die "No common base to restore the job state\n". | |
81 | "please delete jobid: $jobid and create the job again\n" | |
82 | if !defined($base_snapshots->{$volid}); | |
e4f63016 DM |
83 | } |
84 | } | |
85 | } | |
86 | ||
87 | return ($base_snapshots, $last_snapshots, $last_sync_snapname); | |
88 | } | |
89 | ||
a6538c1e DM |
90 | sub remote_prepare_local_job { |
91 | my ($ssh_info, $jobid, $vmid, $volumes, $storeid_list, $last_sync, $parent_snapname, $force, $logfunc) = @_; | |
92 | ||
0c85474f | 93 | my $ssh_cmd = PVE::SSHInfo::ssh_info_to_command($ssh_info); |
a6538c1e DM |
94 | my $cmd = [@$ssh_cmd, '--', 'pvesr', 'prepare-local-job', $jobid]; |
95 | push @$cmd, '--scan', join(',', @$storeid_list) if scalar(@$storeid_list); | |
96 | push @$cmd, @$volumes if scalar(@$volumes); | |
97 | ||
98 | push @$cmd, '--last_sync', $last_sync; | |
99 | push @$cmd, '--parent_snapname', $parent_snapname | |
100 | if $parent_snapname; | |
101 | push @$cmd, '--force' if $force; | |
102 | ||
103 | my $remote_snapshots; | |
104 | ||
105 | my $parser = sub { | |
106 | my $line = shift; | |
107 | $remote_snapshots = JSON::decode_json($line); | |
108 | }; | |
109 | ||
110 | my $logger = sub { | |
111 | my $line = shift; | |
112 | chomp $line; | |
113 | $logfunc->("(remote_prepare_local_job) $line"); | |
114 | }; | |
115 | ||
116 | PVE::Tools::run_command($cmd, outfunc => $parser, errfunc => $logger); | |
117 | ||
118 | die "prepare remote node failed - no result\n" | |
119 | if !defined($remote_snapshots); | |
120 | ||
121 | return $remote_snapshots; | |
122 | } | |
123 | ||
124 | sub remote_finalize_local_job { | |
125 | my ($ssh_info, $jobid, $vmid, $volumes, $last_sync, $logfunc) = @_; | |
126 | ||
0c85474f | 127 | my $ssh_cmd = PVE::SSHInfo::ssh_info_to_command($ssh_info); |
a6538c1e DM |
128 | my $cmd = [@$ssh_cmd, '--', 'pvesr', 'finalize-local-job', $jobid, |
129 | @$volumes, '--last_sync', $last_sync]; | |
130 | ||
131 | my $logger = sub { | |
132 | my $line = shift; | |
133 | chomp $line; | |
134 | $logfunc->("(remote_finalize_local_job) $line"); | |
135 | }; | |
136 | ||
137 | PVE::Tools::run_command($cmd, outfunc => $logger, errfunc => $logger); | |
138 | } | |
139 | ||
140 | # finds local replication snapshots from $last_sync | |
141 | # and removes all replication snapshots with other time stamps | |
142 | sub prepare { | |
143 | my ($storecfg, $volids, $jobid, $last_sync, $parent_snapname, $logfunc) = @_; | |
144 | ||
145 | $last_sync //= 0; | |
146 | ||
b499eccb DM |
147 | my ($prefix, $snapname); |
148 | ||
149 | if (defined($jobid)) { | |
150 | ($prefix, $snapname) = PVE::ReplicationState::replication_snapshot_name($jobid, $last_sync); | |
151 | } else { | |
152 | $prefix = '__replicate_'; | |
153 | } | |
a6538c1e DM |
154 | |
155 | my $last_snapshots = {}; | |
156 | my $cleaned_replicated_volumes = {}; | |
157 | foreach my $volid (@$volids) { | |
158 | my $list = PVE::Storage::volume_snapshot_list($storecfg, $volid); | |
159 | foreach my $snap (@$list) { | |
b499eccb DM |
160 | if ((defined($snapname) && ($snap eq $snapname)) || |
161 | (defined($parent_snapname) && ($snap eq $parent_snapname))) { | |
a6538c1e DM |
162 | $last_snapshots->{$volid}->{$snap} = 1; |
163 | } elsif ($snap =~ m/^\Q$prefix\E/) { | |
a1dfeff3 WL |
164 | if ($last_sync != 0) { |
165 | $logfunc->("delete stale replication snapshot '$snap' on $volid"); | |
166 | eval { | |
167 | PVE::Storage::volume_snapshot_delete($storecfg, $volid, $snap); | |
168 | $cleaned_replicated_volumes->{$volid} = 1; | |
169 | }; | |
170 | ||
171 | # If deleting the snapshot fails, we can not be sure if it was due to an error or a timeout. | |
172 | # The likelihood that the delete has worked out is high at a timeout. | |
173 | # If it really fails, it will try to remove on the next run. | |
174 | if (my $err = $@) { | |
175 | # warn is for syslog/journal. | |
176 | warn $err; | |
177 | ||
178 | # logfunc will written in replication log. | |
179 | $logfunc->("delete stale replication snapshot error: $err"); | |
180 | } | |
181 | # Last_sync=0 and a replication snapshot only occur, if the VM was stolen | |
182 | } else { | |
183 | $last_snapshots->{$volid}->{$snap} = 1; | |
edd61f2b | 184 | } |
a6538c1e DM |
185 | } |
186 | } | |
187 | } | |
188 | ||
189 | return wantarray ? ($last_snapshots, $cleaned_replicated_volumes) : $last_snapshots; | |
190 | } | |
191 | ||
192 | sub replicate_volume { | |
aa0d516f | 193 | my ($ssh_info, $storecfg, $volid, $base_snapshot, $sync_snapname, $rate, $insecure, $logfunc) = @_; |
a6538c1e DM |
194 | |
195 | my ($storeid, $volname) = PVE::Storage::parse_volume_id($volid); | |
196 | ||
45b4c97f TL |
197 | my $ratelimit_bps = $rate ? int(1000000 * $rate) : undef; |
198 | ||
36cff886 FE |
199 | my $opts = { |
200 | 'target_volname' => $volname, | |
201 | 'base_snapshot' => $base_snapshot, | |
202 | 'snapshot' => $sync_snapname, | |
203 | 'ratelimit_bps' => $ratelimit_bps, | |
204 | 'insecure' => $insecure, | |
205 | 'with_snapshots' => 1, | |
206 | }; | |
207 | ||
208 | PVE::Storage::storage_migrate($storecfg, $volid, $ssh_info, $storeid, $opts, $logfunc); | |
a6538c1e DM |
209 | } |
210 | ||
211 | ||
212 | sub replicate { | |
213 | my ($guest_class, $jobcfg, $state, $start_time, $logfunc) = @_; | |
214 | ||
215 | my $local_node = PVE::INotify::nodename(); | |
216 | ||
217 | die "not implemented - internal error" if $jobcfg->{type} ne 'local'; | |
218 | ||
219 | my $dc_conf = PVE::Cluster::cfs_read_file('datacenter.cfg'); | |
220 | ||
221 | my $migration_network; | |
222 | my $migration_type = 'secure'; | |
223 | if (my $mc = $dc_conf->{migration}) { | |
224 | $migration_network = $mc->{network}; | |
225 | $migration_type = $mc->{type} if defined($mc->{type}); | |
226 | } | |
227 | ||
228 | my $jobid = $jobcfg->{id}; | |
229 | my $storecfg = PVE::Storage::config(); | |
230 | my $last_sync = $state->{last_sync}; | |
231 | ||
232 | die "start time before last sync ($start_time <= $last_sync) - abort sync\n" | |
233 | if $start_time <= $last_sync; | |
234 | ||
235 | my $vmid = $jobcfg->{guest}; | |
a6538c1e DM |
236 | |
237 | my $conf = $guest_class->load_config($vmid); | |
238 | my ($running, $freezefs) = $guest_class->__snapshot_check_freeze_needed($vmid, $conf, 0); | |
c324e907 | 239 | my $volumes = $guest_class->get_replicatable_volumes($storecfg, $vmid, $conf, defined($jobcfg->{remove_job})); |
a6538c1e DM |
240 | |
241 | my $sorted_volids = [ sort keys %$volumes ]; | |
242 | ||
243 | $running //= 0; # to avoid undef warnings from logfunc | |
244 | ||
6358ffe1 DM |
245 | my $guest_name = $guest_class->guest_type() . ' ' . $vmid; |
246 | ||
247 | $logfunc->("guest => $guest_name, running => $running"); | |
a6538c1e DM |
248 | $logfunc->("volumes => " . join(',', @$sorted_volids)); |
249 | ||
250 | if (my $remove_job = $jobcfg->{remove_job}) { | |
251 | ||
252 | $logfunc->("start job removal - mode '${remove_job}'"); | |
253 | ||
254 | if ($remove_job eq 'full' && $jobcfg->{target} ne $local_node) { | |
255 | # remove all remote volumes | |
d869a19c WL |
256 | my @store_list = map { (PVE::Storage::parse_volume_id($_))[0] } @$sorted_volids; |
257 | ||
258 | my %hash = map { $_ => 1 } @store_list; | |
259 | ||
0c85474f | 260 | my $ssh_info = PVE::SSHInfo::get_ssh_info($jobcfg->{target}); |
d869a19c | 261 | remote_prepare_local_job($ssh_info, $jobid, $vmid, [], [ keys %hash ], 1, undef, 1, $logfunc); |
a6538c1e DM |
262 | |
263 | } | |
264 | # remove all local replication snapshots (lastsync => 0) | |
a1dfeff3 | 265 | prepare($storecfg, $sorted_volids, $jobid, 1, undef, $logfunc); |
a6538c1e DM |
266 | |
267 | PVE::ReplicationConfig::delete_job($jobid); # update config | |
268 | $logfunc->("job removed"); | |
269 | ||
5899ebbd | 270 | return undef; |
a6538c1e DM |
271 | } |
272 | ||
0c85474f | 273 | my $ssh_info = PVE::SSHInfo::get_ssh_info($jobcfg->{target}, $migration_network); |
a6538c1e | 274 | |
e4f63016 | 275 | my ($base_snapshots, $last_snapshots, $last_sync_snapname) = find_common_replication_snapshot( |
c05dc937 | 276 | $ssh_info, $jobid, $vmid, $storecfg, $sorted_volids, $state->{storeid_list}, $last_sync, $conf, $logfunc); |
a6538c1e DM |
277 | |
278 | my $storeid_hash = {}; | |
279 | foreach my $volid (@$sorted_volids) { | |
280 | my ($storeid) = PVE::Storage::parse_volume_id($volid); | |
281 | $storeid_hash->{$storeid} = 1; | |
282 | } | |
283 | $state->{storeid_list} = [ sort keys %$storeid_hash ]; | |
284 | ||
285 | # freeze filesystem for data consistency | |
286 | if ($freezefs) { | |
287 | $logfunc->("freeze guest filesystem"); | |
288 | $guest_class->__snapshot_freeze($vmid, 0); | |
289 | } | |
290 | ||
291 | # make snapshot of all volumes | |
e4f63016 DM |
292 | my $sync_snapname = |
293 | PVE::ReplicationState::replication_snapshot_name($jobid, $start_time); | |
294 | ||
a6538c1e DM |
295 | my $replicate_snapshots = {}; |
296 | eval { | |
297 | foreach my $volid (@$sorted_volids) { | |
298 | $logfunc->("create snapshot '${sync_snapname}' on $volid"); | |
299 | PVE::Storage::volume_snapshot($storecfg, $volid, $sync_snapname); | |
300 | $replicate_snapshots->{$volid} = 1; | |
301 | } | |
302 | }; | |
303 | my $err = $@; | |
304 | ||
5e93f430 | 305 | # thaw immediately |
a6538c1e | 306 | if ($freezefs) { |
5e93f430 | 307 | $logfunc->("thaw guest filesystem"); |
a6538c1e DM |
308 | $guest_class->__snapshot_freeze($vmid, 1); |
309 | } | |
310 | ||
311 | my $cleanup_local_snapshots = sub { | |
312 | my ($volid_hash, $snapname) = @_; | |
313 | foreach my $volid (sort keys %$volid_hash) { | |
314 | $logfunc->("delete previous replication snapshot '$snapname' on $volid"); | |
315 | eval { PVE::Storage::volume_snapshot_delete($storecfg, $volid, $snapname); }; | |
316 | warn $@ if $@; | |
317 | } | |
318 | }; | |
319 | ||
320 | if ($err) { | |
321 | $cleanup_local_snapshots->($replicate_snapshots, $sync_snapname); # try to cleanup | |
322 | die $err; | |
323 | } | |
324 | ||
325 | eval { | |
326 | ||
327 | my $rate = $jobcfg->{rate}; | |
328 | my $insecure = $migration_type eq 'insecure'; | |
329 | ||
e90f586a TL |
330 | $logfunc->("using $migration_type transmission, rate limit: " |
331 | . ($rate ? "$rate MByte/s" : "none")); | |
332 | ||
a6538c1e DM |
333 | foreach my $volid (@$sorted_volids) { |
334 | my $base_snapname; | |
335 | ||
e4f63016 DM |
336 | if (defined($base_snapname = $base_snapshots->{$volid})) { |
337 | $logfunc->("incremental sync '$volid' ($base_snapname => $sync_snapname)"); | |
338 | } else { | |
339 | $logfunc->("full sync '$volid' ($sync_snapname)"); | |
a6538c1e DM |
340 | } |
341 | ||
aa0d516f | 342 | replicate_volume($ssh_info, $storecfg, $volid, $base_snapname, $sync_snapname, $rate, $insecure, $logfunc); |
a6538c1e DM |
343 | } |
344 | }; | |
a6538c1e | 345 | |
edd61f2b | 346 | if ($err = $@) { |
a6538c1e DM |
347 | $cleanup_local_snapshots->($replicate_snapshots, $sync_snapname); # try to cleanup |
348 | # we do not cleanup the remote side here - this is done in | |
349 | # next run of prepare_local_job | |
350 | die $err; | |
351 | } | |
352 | ||
353 | # remove old snapshots because they are no longer needed | |
354 | $cleanup_local_snapshots->($last_snapshots, $last_sync_snapname); | |
355 | ||
ce22af08 WL |
356 | eval { |
357 | remote_finalize_local_job($ssh_info, $jobid, $vmid, $sorted_volids, $start_time, $logfunc); | |
358 | }; | |
a6538c1e | 359 | |
ce22af08 WL |
360 | # old snapshots will removed by next run from prepare_local_job. |
361 | if ($err = $@) { | |
362 | # warn is for syslog/journal. | |
363 | warn $err; | |
364 | ||
365 | # logfunc will written in replication log. | |
c1797f7a | 366 | $logfunc->("delete stale replication snapshot error: $err"); |
ce22af08 | 367 | } |
5899ebbd DM |
368 | |
369 | return $volumes; | |
a6538c1e DM |
370 | } |
371 | ||
372 | my $run_replication_nolock = sub { | |
ac02a68e | 373 | my ($guest_class, $jobcfg, $iteration, $start_time, $logfunc, $verbose) = @_; |
a6538c1e DM |
374 | |
375 | my $jobid = $jobcfg->{id}; | |
376 | ||
5899ebbd DM |
377 | my $volumes; |
378 | ||
ab44df53 | 379 | # we normally write errors into the state file, |
a6538c1e DM |
380 | # but we also catch unexpected errors and log them to syslog |
381 | # (for examply when there are problems writing the state file) | |
a6538c1e | 382 | |
ac02a68e WL |
383 | my $state = PVE::ReplicationState::read_job_state($jobcfg); |
384 | ||
385 | PVE::ReplicationState::record_job_start($jobcfg, $state, $start_time, $iteration); | |
a6538c1e | 386 | |
ac02a68e | 387 | my $t0 = [gettimeofday]; |
a6538c1e | 388 | |
ac02a68e WL |
389 | mkdir $PVE::ReplicationState::replicate_logdir; |
390 | my $logfile = PVE::ReplicationState::job_logfile_name($jobid); | |
391 | open(my $logfd, '>', $logfile) || | |
392 | die "unable to open replication log '$logfile' - $!\n"; | |
a6538c1e | 393 | |
ac02a68e WL |
394 | my $logfunc_wrapper = sub { |
395 | my ($msg) = @_; | |
a6538c1e | 396 | |
ac02a68e WL |
397 | my $ctime = get_log_time(); |
398 | print $logfd "$ctime $jobid: $msg\n"; | |
399 | if ($logfunc) { | |
400 | if ($verbose) { | |
401 | $logfunc->("$ctime $jobid: $msg"); | |
402 | } else { | |
403 | $logfunc->($msg); | |
3ec43aaf | 404 | } |
ac02a68e WL |
405 | } |
406 | }; | |
a6538c1e | 407 | |
ac02a68e | 408 | $logfunc_wrapper->("start replication job"); |
a6538c1e | 409 | |
ac02a68e WL |
410 | eval { |
411 | $volumes = replicate($guest_class, $jobcfg, $state, $start_time, $logfunc_wrapper); | |
412 | }; | |
413 | my $err = $@; | |
a6538c1e | 414 | |
ac02a68e WL |
415 | if ($err) { |
416 | my $msg = "end replication job with error: $err"; | |
417 | chomp $msg; | |
418 | $logfunc_wrapper->($msg); | |
419 | } else { | |
420 | $logfunc_wrapper->("end replication job"); | |
421 | } | |
a6538c1e | 422 | |
ac02a68e | 423 | PVE::ReplicationState::record_job_end($jobcfg, $state, $start_time, tv_interval($t0), $err); |
c17dcb3e | 424 | |
ac02a68e | 425 | close($logfd); |
1b82f171 | 426 | |
ac02a68e | 427 | die $err if $err; |
5899ebbd DM |
428 | |
429 | return $volumes; | |
a6538c1e DM |
430 | }; |
431 | ||
432 | sub run_replication { | |
ac02a68e | 433 | my ($guest_class, $jobcfg, $iteration, $start_time, $logfunc, $verbose) = @_; |
a6538c1e | 434 | |
5899ebbd DM |
435 | my $volumes; |
436 | ||
ac02a68e WL |
437 | my $timeout = 2; # do not wait too long - we repeat periodically anyways |
438 | $volumes = PVE::GuestHelpers::guest_migration_lock( | |
439 | $jobcfg->{guest}, $timeout, $run_replication_nolock, | |
440 | $guest_class, $jobcfg, $iteration, $start_time, $logfunc, $verbose); | |
441 | ||
5899ebbd | 442 | return $volumes; |
a6538c1e DM |
443 | } |
444 | ||
45c0b755 FE |
445 | sub is_replication_snapshot { |
446 | my ($snapshot_name) = @_; | |
447 | ||
448 | return $snapshot_name =~ m/^__replicate_/ ? 1 : 0; | |
449 | } | |
450 | ||
a6538c1e | 451 | 1; |