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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; | |
19 | ||
20 | ||
21 | # regression tests should overwrite this | |
22 | sub get_log_time { | |
23 | ||
93c3695b | 24 | return strftime("%F %H:%M:%S", localtime); |
a6538c1e DM |
25 | } |
26 | ||
e4f63016 DM |
27 | # Find common base replication snapshot, available on local and remote side. |
28 | # Note: this also removes stale replication snapshots | |
29 | sub find_common_replication_snapshot { | |
30 | my ($ssh_info, $jobid, $vmid, $storecfg, $volumes, $storeid_list, $last_sync, $parent_snapname, $logfunc) = @_; | |
31 | ||
32 | my $last_sync_snapname = | |
33 | PVE::ReplicationState::replication_snapshot_name($jobid, $last_sync); | |
34 | ||
35 | # test if we have a replication_ snapshot from last sync | |
36 | # and remove all other/stale replication snapshots | |
37 | ||
38 | my $last_snapshots = prepare( | |
39 | $storecfg, $volumes, $jobid, $last_sync, $parent_snapname, $logfunc); | |
40 | ||
41 | # prepare remote side | |
42 | my $remote_snapshots = remote_prepare_local_job( | |
43 | $ssh_info, $jobid, $vmid, $volumes, $storeid_list, $last_sync, $parent_snapname, 0, $logfunc); | |
44 | ||
45 | my $base_snapshots = {}; | |
46 | ||
47 | foreach my $volid (@$volumes) { | |
48 | my $base_snapname; | |
49 | ||
50 | if (defined($last_snapshots->{$volid}) && defined($remote_snapshots->{$volid})) { | |
51 | if ($last_snapshots->{$volid}->{$last_sync_snapname} && | |
52 | $remote_snapshots->{$volid}->{$last_sync_snapname}) { | |
53 | $base_snapshots->{$volid} = $last_sync_snapname; | |
54 | } elsif (defined($parent_snapname) && | |
55 | ($last_snapshots->{$volid}->{$parent_snapname} && | |
56 | $remote_snapshots->{$volid}->{$parent_snapname})) { | |
57 | $base_snapshots->{$volid} = $parent_snapname; | |
d5b277dc WL |
58 | } elsif ($last_sync == 0) { |
59 | my @desc_sorted_snap = | |
60 | map { $_->[1] } sort { $b->[0] <=> $a->[0] } | |
61 | map { [ ($_ =~ /__replicate_\Q$jobid\E_(\d+)_/)[0] || 0, $_ ] } | |
62 | keys %{$remote_snapshots->{$volid}}; | |
63 | ||
64 | foreach my $remote_snap (@desc_sorted_snap) { | |
65 | if (defined($last_snapshots->{$volid}->{$remote_snap})) { | |
66 | $base_snapshots->{$volid} = $remote_snap; | |
67 | last; | |
68 | } | |
69 | } | |
70 | die "No common base to restore the job state\n". | |
71 | "please delete jobid: $jobid and create the job again\n" | |
72 | if !defined($base_snapshots->{$volid}); | |
e4f63016 DM |
73 | } |
74 | } | |
75 | } | |
76 | ||
77 | return ($base_snapshots, $last_snapshots, $last_sync_snapname); | |
78 | } | |
79 | ||
a6538c1e DM |
80 | sub remote_prepare_local_job { |
81 | my ($ssh_info, $jobid, $vmid, $volumes, $storeid_list, $last_sync, $parent_snapname, $force, $logfunc) = @_; | |
82 | ||
83 | my $ssh_cmd = PVE::Cluster::ssh_info_to_command($ssh_info); | |
84 | my $cmd = [@$ssh_cmd, '--', 'pvesr', 'prepare-local-job', $jobid]; | |
85 | push @$cmd, '--scan', join(',', @$storeid_list) if scalar(@$storeid_list); | |
86 | push @$cmd, @$volumes if scalar(@$volumes); | |
87 | ||
88 | push @$cmd, '--last_sync', $last_sync; | |
89 | push @$cmd, '--parent_snapname', $parent_snapname | |
90 | if $parent_snapname; | |
91 | push @$cmd, '--force' if $force; | |
92 | ||
93 | my $remote_snapshots; | |
94 | ||
95 | my $parser = sub { | |
96 | my $line = shift; | |
97 | $remote_snapshots = JSON::decode_json($line); | |
98 | }; | |
99 | ||
100 | my $logger = sub { | |
101 | my $line = shift; | |
102 | chomp $line; | |
103 | $logfunc->("(remote_prepare_local_job) $line"); | |
104 | }; | |
105 | ||
106 | PVE::Tools::run_command($cmd, outfunc => $parser, errfunc => $logger); | |
107 | ||
108 | die "prepare remote node failed - no result\n" | |
109 | if !defined($remote_snapshots); | |
110 | ||
111 | return $remote_snapshots; | |
112 | } | |
113 | ||
114 | sub remote_finalize_local_job { | |
115 | my ($ssh_info, $jobid, $vmid, $volumes, $last_sync, $logfunc) = @_; | |
116 | ||
117 | my $ssh_cmd = PVE::Cluster::ssh_info_to_command($ssh_info); | |
118 | my $cmd = [@$ssh_cmd, '--', 'pvesr', 'finalize-local-job', $jobid, | |
119 | @$volumes, '--last_sync', $last_sync]; | |
120 | ||
121 | my $logger = sub { | |
122 | my $line = shift; | |
123 | chomp $line; | |
124 | $logfunc->("(remote_finalize_local_job) $line"); | |
125 | }; | |
126 | ||
127 | PVE::Tools::run_command($cmd, outfunc => $logger, errfunc => $logger); | |
128 | } | |
129 | ||
130 | # finds local replication snapshots from $last_sync | |
131 | # and removes all replication snapshots with other time stamps | |
132 | sub prepare { | |
133 | my ($storecfg, $volids, $jobid, $last_sync, $parent_snapname, $logfunc) = @_; | |
134 | ||
135 | $last_sync //= 0; | |
136 | ||
b499eccb DM |
137 | my ($prefix, $snapname); |
138 | ||
139 | if (defined($jobid)) { | |
140 | ($prefix, $snapname) = PVE::ReplicationState::replication_snapshot_name($jobid, $last_sync); | |
141 | } else { | |
142 | $prefix = '__replicate_'; | |
143 | } | |
a6538c1e DM |
144 | |
145 | my $last_snapshots = {}; | |
146 | my $cleaned_replicated_volumes = {}; | |
147 | foreach my $volid (@$volids) { | |
148 | my $list = PVE::Storage::volume_snapshot_list($storecfg, $volid); | |
149 | foreach my $snap (@$list) { | |
b499eccb DM |
150 | if ((defined($snapname) && ($snap eq $snapname)) || |
151 | (defined($parent_snapname) && ($snap eq $parent_snapname))) { | |
a6538c1e DM |
152 | $last_snapshots->{$volid}->{$snap} = 1; |
153 | } elsif ($snap =~ m/^\Q$prefix\E/) { | |
a1dfeff3 WL |
154 | if ($last_sync != 0) { |
155 | $logfunc->("delete stale replication snapshot '$snap' on $volid"); | |
156 | eval { | |
157 | PVE::Storage::volume_snapshot_delete($storecfg, $volid, $snap); | |
158 | $cleaned_replicated_volumes->{$volid} = 1; | |
159 | }; | |
160 | ||
161 | # If deleting the snapshot fails, we can not be sure if it was due to an error or a timeout. | |
162 | # The likelihood that the delete has worked out is high at a timeout. | |
163 | # If it really fails, it will try to remove on the next run. | |
164 | if (my $err = $@) { | |
165 | # warn is for syslog/journal. | |
166 | warn $err; | |
167 | ||
168 | # logfunc will written in replication log. | |
169 | $logfunc->("delete stale replication snapshot error: $err"); | |
170 | } | |
171 | # Last_sync=0 and a replication snapshot only occur, if the VM was stolen | |
172 | } else { | |
173 | $last_snapshots->{$volid}->{$snap} = 1; | |
edd61f2b | 174 | } |
a6538c1e DM |
175 | } |
176 | } | |
177 | } | |
178 | ||
179 | return wantarray ? ($last_snapshots, $cleaned_replicated_volumes) : $last_snapshots; | |
180 | } | |
181 | ||
182 | sub replicate_volume { | |
aa0d516f | 183 | my ($ssh_info, $storecfg, $volid, $base_snapshot, $sync_snapname, $rate, $insecure, $logfunc) = @_; |
a6538c1e DM |
184 | |
185 | my ($storeid, $volname) = PVE::Storage::parse_volume_id($volid); | |
186 | ||
c475e16d | 187 | my $ratelimit_bps = int(1000000*$rate) if $rate; |
a6538c1e | 188 | PVE::Storage::storage_migrate($storecfg, $volid, $ssh_info, $storeid, $volname, |
aa0d516f | 189 | $base_snapshot, $sync_snapname, $ratelimit_bps, $insecure, 1, $logfunc); |
a6538c1e DM |
190 | } |
191 | ||
192 | ||
193 | sub replicate { | |
194 | my ($guest_class, $jobcfg, $state, $start_time, $logfunc) = @_; | |
195 | ||
196 | my $local_node = PVE::INotify::nodename(); | |
197 | ||
198 | die "not implemented - internal error" if $jobcfg->{type} ne 'local'; | |
199 | ||
200 | my $dc_conf = PVE::Cluster::cfs_read_file('datacenter.cfg'); | |
201 | ||
202 | my $migration_network; | |
203 | my $migration_type = 'secure'; | |
204 | if (my $mc = $dc_conf->{migration}) { | |
205 | $migration_network = $mc->{network}; | |
206 | $migration_type = $mc->{type} if defined($mc->{type}); | |
207 | } | |
208 | ||
209 | my $jobid = $jobcfg->{id}; | |
210 | my $storecfg = PVE::Storage::config(); | |
211 | my $last_sync = $state->{last_sync}; | |
212 | ||
213 | die "start time before last sync ($start_time <= $last_sync) - abort sync\n" | |
214 | if $start_time <= $last_sync; | |
215 | ||
216 | my $vmid = $jobcfg->{guest}; | |
a6538c1e DM |
217 | |
218 | my $conf = $guest_class->load_config($vmid); | |
219 | my ($running, $freezefs) = $guest_class->__snapshot_check_freeze_needed($vmid, $conf, 0); | |
c324e907 | 220 | my $volumes = $guest_class->get_replicatable_volumes($storecfg, $vmid, $conf, defined($jobcfg->{remove_job})); |
a6538c1e DM |
221 | |
222 | my $sorted_volids = [ sort keys %$volumes ]; | |
223 | ||
224 | $running //= 0; # to avoid undef warnings from logfunc | |
225 | ||
6358ffe1 DM |
226 | my $guest_name = $guest_class->guest_type() . ' ' . $vmid; |
227 | ||
228 | $logfunc->("guest => $guest_name, running => $running"); | |
a6538c1e DM |
229 | $logfunc->("volumes => " . join(',', @$sorted_volids)); |
230 | ||
231 | if (my $remove_job = $jobcfg->{remove_job}) { | |
232 | ||
233 | $logfunc->("start job removal - mode '${remove_job}'"); | |
234 | ||
235 | if ($remove_job eq 'full' && $jobcfg->{target} ne $local_node) { | |
236 | # remove all remote volumes | |
d869a19c WL |
237 | my @store_list = map { (PVE::Storage::parse_volume_id($_))[0] } @$sorted_volids; |
238 | ||
239 | my %hash = map { $_ => 1 } @store_list; | |
240 | ||
a6538c1e | 241 | my $ssh_info = PVE::Cluster::get_ssh_info($jobcfg->{target}); |
d869a19c | 242 | remote_prepare_local_job($ssh_info, $jobid, $vmid, [], [ keys %hash ], 1, undef, 1, $logfunc); |
a6538c1e DM |
243 | |
244 | } | |
245 | # remove all local replication snapshots (lastsync => 0) | |
a1dfeff3 | 246 | prepare($storecfg, $sorted_volids, $jobid, 1, undef, $logfunc); |
a6538c1e DM |
247 | |
248 | PVE::ReplicationConfig::delete_job($jobid); # update config | |
249 | $logfunc->("job removed"); | |
250 | ||
5899ebbd | 251 | return undef; |
a6538c1e DM |
252 | } |
253 | ||
254 | my $ssh_info = PVE::Cluster::get_ssh_info($jobcfg->{target}, $migration_network); | |
255 | ||
a6538c1e DM |
256 | my $parent_snapname = $conf->{parent}; |
257 | ||
e4f63016 DM |
258 | my ($base_snapshots, $last_snapshots, $last_sync_snapname) = find_common_replication_snapshot( |
259 | $ssh_info, $jobid, $vmid, $storecfg, $sorted_volids, $state->{storeid_list}, $last_sync, $parent_snapname, $logfunc); | |
a6538c1e DM |
260 | |
261 | my $storeid_hash = {}; | |
262 | foreach my $volid (@$sorted_volids) { | |
263 | my ($storeid) = PVE::Storage::parse_volume_id($volid); | |
264 | $storeid_hash->{$storeid} = 1; | |
265 | } | |
266 | $state->{storeid_list} = [ sort keys %$storeid_hash ]; | |
267 | ||
268 | # freeze filesystem for data consistency | |
269 | if ($freezefs) { | |
270 | $logfunc->("freeze guest filesystem"); | |
271 | $guest_class->__snapshot_freeze($vmid, 0); | |
272 | } | |
273 | ||
274 | # make snapshot of all volumes | |
e4f63016 DM |
275 | my $sync_snapname = |
276 | PVE::ReplicationState::replication_snapshot_name($jobid, $start_time); | |
277 | ||
a6538c1e DM |
278 | my $replicate_snapshots = {}; |
279 | eval { | |
280 | foreach my $volid (@$sorted_volids) { | |
281 | $logfunc->("create snapshot '${sync_snapname}' on $volid"); | |
282 | PVE::Storage::volume_snapshot($storecfg, $volid, $sync_snapname); | |
283 | $replicate_snapshots->{$volid} = 1; | |
284 | } | |
285 | }; | |
286 | my $err = $@; | |
287 | ||
5e93f430 | 288 | # thaw immediately |
a6538c1e | 289 | if ($freezefs) { |
5e93f430 | 290 | $logfunc->("thaw guest filesystem"); |
a6538c1e DM |
291 | $guest_class->__snapshot_freeze($vmid, 1); |
292 | } | |
293 | ||
294 | my $cleanup_local_snapshots = sub { | |
295 | my ($volid_hash, $snapname) = @_; | |
296 | foreach my $volid (sort keys %$volid_hash) { | |
297 | $logfunc->("delete previous replication snapshot '$snapname' on $volid"); | |
298 | eval { PVE::Storage::volume_snapshot_delete($storecfg, $volid, $snapname); }; | |
299 | warn $@ if $@; | |
300 | } | |
301 | }; | |
302 | ||
303 | if ($err) { | |
304 | $cleanup_local_snapshots->($replicate_snapshots, $sync_snapname); # try to cleanup | |
305 | die $err; | |
306 | } | |
307 | ||
308 | eval { | |
309 | ||
310 | my $rate = $jobcfg->{rate}; | |
311 | my $insecure = $migration_type eq 'insecure'; | |
312 | ||
313 | foreach my $volid (@$sorted_volids) { | |
314 | my $base_snapname; | |
315 | ||
e4f63016 DM |
316 | if (defined($base_snapname = $base_snapshots->{$volid})) { |
317 | $logfunc->("incremental sync '$volid' ($base_snapname => $sync_snapname)"); | |
318 | } else { | |
319 | $logfunc->("full sync '$volid' ($sync_snapname)"); | |
a6538c1e DM |
320 | } |
321 | ||
aa0d516f | 322 | replicate_volume($ssh_info, $storecfg, $volid, $base_snapname, $sync_snapname, $rate, $insecure, $logfunc); |
a6538c1e DM |
323 | } |
324 | }; | |
a6538c1e | 325 | |
edd61f2b | 326 | if ($err = $@) { |
a6538c1e DM |
327 | $cleanup_local_snapshots->($replicate_snapshots, $sync_snapname); # try to cleanup |
328 | # we do not cleanup the remote side here - this is done in | |
329 | # next run of prepare_local_job | |
330 | die $err; | |
331 | } | |
332 | ||
333 | # remove old snapshots because they are no longer needed | |
334 | $cleanup_local_snapshots->($last_snapshots, $last_sync_snapname); | |
335 | ||
ce22af08 WL |
336 | eval { |
337 | remote_finalize_local_job($ssh_info, $jobid, $vmid, $sorted_volids, $start_time, $logfunc); | |
338 | }; | |
a6538c1e | 339 | |
ce22af08 WL |
340 | # old snapshots will removed by next run from prepare_local_job. |
341 | if ($err = $@) { | |
342 | # warn is for syslog/journal. | |
343 | warn $err; | |
344 | ||
345 | # logfunc will written in replication log. | |
c1797f7a | 346 | $logfunc->("delete stale replication snapshot error: $err"); |
ce22af08 | 347 | } |
5899ebbd DM |
348 | |
349 | return $volumes; | |
a6538c1e DM |
350 | } |
351 | ||
352 | my $run_replication_nolock = sub { | |
ac02a68e | 353 | my ($guest_class, $jobcfg, $iteration, $start_time, $logfunc, $verbose) = @_; |
a6538c1e DM |
354 | |
355 | my $jobid = $jobcfg->{id}; | |
356 | ||
5899ebbd DM |
357 | my $volumes; |
358 | ||
a6538c1e DM |
359 | # we normaly write errors into the state file, |
360 | # but we also catch unexpected errors and log them to syslog | |
361 | # (for examply when there are problems writing the state file) | |
a6538c1e | 362 | |
ac02a68e WL |
363 | my $state = PVE::ReplicationState::read_job_state($jobcfg); |
364 | ||
365 | PVE::ReplicationState::record_job_start($jobcfg, $state, $start_time, $iteration); | |
a6538c1e | 366 | |
ac02a68e | 367 | my $t0 = [gettimeofday]; |
a6538c1e | 368 | |
ac02a68e WL |
369 | mkdir $PVE::ReplicationState::replicate_logdir; |
370 | my $logfile = PVE::ReplicationState::job_logfile_name($jobid); | |
371 | open(my $logfd, '>', $logfile) || | |
372 | die "unable to open replication log '$logfile' - $!\n"; | |
a6538c1e | 373 | |
ac02a68e WL |
374 | my $logfunc_wrapper = sub { |
375 | my ($msg) = @_; | |
a6538c1e | 376 | |
ac02a68e WL |
377 | my $ctime = get_log_time(); |
378 | print $logfd "$ctime $jobid: $msg\n"; | |
379 | if ($logfunc) { | |
380 | if ($verbose) { | |
381 | $logfunc->("$ctime $jobid: $msg"); | |
382 | } else { | |
383 | $logfunc->($msg); | |
3ec43aaf | 384 | } |
ac02a68e WL |
385 | } |
386 | }; | |
a6538c1e | 387 | |
ac02a68e | 388 | $logfunc_wrapper->("start replication job"); |
a6538c1e | 389 | |
ac02a68e WL |
390 | eval { |
391 | $volumes = replicate($guest_class, $jobcfg, $state, $start_time, $logfunc_wrapper); | |
392 | }; | |
393 | my $err = $@; | |
a6538c1e | 394 | |
ac02a68e WL |
395 | if ($err) { |
396 | my $msg = "end replication job with error: $err"; | |
397 | chomp $msg; | |
398 | $logfunc_wrapper->($msg); | |
399 | } else { | |
400 | $logfunc_wrapper->("end replication job"); | |
401 | } | |
a6538c1e | 402 | |
ac02a68e | 403 | PVE::ReplicationState::record_job_end($jobcfg, $state, $start_time, tv_interval($t0), $err); |
c17dcb3e | 404 | |
ac02a68e | 405 | close($logfd); |
1b82f171 | 406 | |
ac02a68e | 407 | die $err if $err; |
5899ebbd DM |
408 | |
409 | return $volumes; | |
a6538c1e DM |
410 | }; |
411 | ||
412 | sub run_replication { | |
ac02a68e | 413 | my ($guest_class, $jobcfg, $iteration, $start_time, $logfunc, $verbose) = @_; |
a6538c1e | 414 | |
5899ebbd DM |
415 | my $volumes; |
416 | ||
ac02a68e WL |
417 | my $timeout = 2; # do not wait too long - we repeat periodically anyways |
418 | $volumes = PVE::GuestHelpers::guest_migration_lock( | |
419 | $jobcfg->{guest}, $timeout, $run_replication_nolock, | |
420 | $guest_class, $jobcfg, $iteration, $start_time, $logfunc, $verbose); | |
421 | ||
5899ebbd | 422 | return $volumes; |
a6538c1e DM |
423 | } |
424 | ||
425 | 1; |