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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; | |
14 | use PVE::Storage; | |
15 | use PVE::GuestHelpers; | |
16 | use PVE::ReplicationConfig; | |
17 | use PVE::ReplicationState; | |
18 | ||
19 | ||
20 | # regression tests should overwrite this | |
21 | sub get_log_time { | |
22 | ||
93c3695b | 23 | return strftime("%F %H:%M:%S", localtime); |
a6538c1e DM |
24 | } |
25 | ||
e4f63016 DM |
26 | # Find common base replication snapshot, available on local and remote side. |
27 | # Note: this also removes stale replication snapshots | |
28 | sub find_common_replication_snapshot { | |
29 | my ($ssh_info, $jobid, $vmid, $storecfg, $volumes, $storeid_list, $last_sync, $parent_snapname, $logfunc) = @_; | |
30 | ||
31 | my $last_sync_snapname = | |
32 | PVE::ReplicationState::replication_snapshot_name($jobid, $last_sync); | |
33 | ||
34 | # test if we have a replication_ snapshot from last sync | |
35 | # and remove all other/stale replication snapshots | |
36 | ||
37 | my $last_snapshots = prepare( | |
38 | $storecfg, $volumes, $jobid, $last_sync, $parent_snapname, $logfunc); | |
39 | ||
40 | # prepare remote side | |
41 | my $remote_snapshots = remote_prepare_local_job( | |
42 | $ssh_info, $jobid, $vmid, $volumes, $storeid_list, $last_sync, $parent_snapname, 0, $logfunc); | |
43 | ||
44 | my $base_snapshots = {}; | |
45 | ||
46 | foreach my $volid (@$volumes) { | |
47 | my $base_snapname; | |
48 | ||
49 | if (defined($last_snapshots->{$volid}) && defined($remote_snapshots->{$volid})) { | |
50 | if ($last_snapshots->{$volid}->{$last_sync_snapname} && | |
51 | $remote_snapshots->{$volid}->{$last_sync_snapname}) { | |
52 | $base_snapshots->{$volid} = $last_sync_snapname; | |
53 | } elsif (defined($parent_snapname) && | |
54 | ($last_snapshots->{$volid}->{$parent_snapname} && | |
55 | $remote_snapshots->{$volid}->{$parent_snapname})) { | |
56 | $base_snapshots->{$volid} = $parent_snapname; | |
57 | } | |
58 | } | |
59 | } | |
60 | ||
61 | return ($base_snapshots, $last_snapshots, $last_sync_snapname); | |
62 | } | |
63 | ||
a6538c1e DM |
64 | sub remote_prepare_local_job { |
65 | my ($ssh_info, $jobid, $vmid, $volumes, $storeid_list, $last_sync, $parent_snapname, $force, $logfunc) = @_; | |
66 | ||
67 | my $ssh_cmd = PVE::Cluster::ssh_info_to_command($ssh_info); | |
68 | my $cmd = [@$ssh_cmd, '--', 'pvesr', 'prepare-local-job', $jobid]; | |
69 | push @$cmd, '--scan', join(',', @$storeid_list) if scalar(@$storeid_list); | |
70 | push @$cmd, @$volumes if scalar(@$volumes); | |
71 | ||
72 | push @$cmd, '--last_sync', $last_sync; | |
73 | push @$cmd, '--parent_snapname', $parent_snapname | |
74 | if $parent_snapname; | |
75 | push @$cmd, '--force' if $force; | |
76 | ||
77 | my $remote_snapshots; | |
78 | ||
79 | my $parser = sub { | |
80 | my $line = shift; | |
81 | $remote_snapshots = JSON::decode_json($line); | |
82 | }; | |
83 | ||
84 | my $logger = sub { | |
85 | my $line = shift; | |
86 | chomp $line; | |
87 | $logfunc->("(remote_prepare_local_job) $line"); | |
88 | }; | |
89 | ||
90 | PVE::Tools::run_command($cmd, outfunc => $parser, errfunc => $logger); | |
91 | ||
92 | die "prepare remote node failed - no result\n" | |
93 | if !defined($remote_snapshots); | |
94 | ||
95 | return $remote_snapshots; | |
96 | } | |
97 | ||
98 | sub remote_finalize_local_job { | |
99 | my ($ssh_info, $jobid, $vmid, $volumes, $last_sync, $logfunc) = @_; | |
100 | ||
101 | my $ssh_cmd = PVE::Cluster::ssh_info_to_command($ssh_info); | |
102 | my $cmd = [@$ssh_cmd, '--', 'pvesr', 'finalize-local-job', $jobid, | |
103 | @$volumes, '--last_sync', $last_sync]; | |
104 | ||
105 | my $logger = sub { | |
106 | my $line = shift; | |
107 | chomp $line; | |
108 | $logfunc->("(remote_finalize_local_job) $line"); | |
109 | }; | |
110 | ||
111 | PVE::Tools::run_command($cmd, outfunc => $logger, errfunc => $logger); | |
112 | } | |
113 | ||
114 | # finds local replication snapshots from $last_sync | |
115 | # and removes all replication snapshots with other time stamps | |
116 | sub prepare { | |
117 | my ($storecfg, $volids, $jobid, $last_sync, $parent_snapname, $logfunc) = @_; | |
118 | ||
119 | $last_sync //= 0; | |
120 | ||
b499eccb DM |
121 | my ($prefix, $snapname); |
122 | ||
123 | if (defined($jobid)) { | |
124 | ($prefix, $snapname) = PVE::ReplicationState::replication_snapshot_name($jobid, $last_sync); | |
125 | } else { | |
126 | $prefix = '__replicate_'; | |
127 | } | |
a6538c1e DM |
128 | |
129 | my $last_snapshots = {}; | |
130 | my $cleaned_replicated_volumes = {}; | |
131 | foreach my $volid (@$volids) { | |
132 | my $list = PVE::Storage::volume_snapshot_list($storecfg, $volid); | |
133 | foreach my $snap (@$list) { | |
b499eccb DM |
134 | if ((defined($snapname) && ($snap eq $snapname)) || |
135 | (defined($parent_snapname) && ($snap eq $parent_snapname))) { | |
a6538c1e DM |
136 | $last_snapshots->{$volid}->{$snap} = 1; |
137 | } elsif ($snap =~ m/^\Q$prefix\E/) { | |
138 | $logfunc->("delete stale replication snapshot '$snap' on $volid"); | |
ce22af08 WL |
139 | |
140 | eval { | |
141 | PVE::Storage::volume_snapshot_delete($storecfg, $volid, $snap); | |
142 | $cleaned_replicated_volumes->{$volid} = 1; | |
143 | }; | |
144 | ||
145 | # If deleting the snapshot fails, we can not be sure if it was due to an error or a timeout. | |
146 | # The likelihood that the delete has worked out is high at a timeout. | |
147 | # If it really fails, it will try to remove on the next run. | |
148 | ||
149 | # warn is for syslog/journal. | |
150 | warn $@ if $@; | |
151 | ||
152 | # logfunc will written in replication log. | |
153 | $logfunc->("delete stale replication snapshot error: $@") if $@; | |
a6538c1e DM |
154 | } |
155 | } | |
156 | } | |
157 | ||
158 | return wantarray ? ($last_snapshots, $cleaned_replicated_volumes) : $last_snapshots; | |
159 | } | |
160 | ||
161 | sub replicate_volume { | |
aa0d516f | 162 | my ($ssh_info, $storecfg, $volid, $base_snapshot, $sync_snapname, $rate, $insecure, $logfunc) = @_; |
a6538c1e DM |
163 | |
164 | my ($storeid, $volname) = PVE::Storage::parse_volume_id($volid); | |
165 | ||
c475e16d | 166 | my $ratelimit_bps = int(1000000*$rate) if $rate; |
a6538c1e | 167 | PVE::Storage::storage_migrate($storecfg, $volid, $ssh_info, $storeid, $volname, |
aa0d516f | 168 | $base_snapshot, $sync_snapname, $ratelimit_bps, $insecure, 1, $logfunc); |
a6538c1e DM |
169 | } |
170 | ||
171 | ||
172 | sub replicate { | |
173 | my ($guest_class, $jobcfg, $state, $start_time, $logfunc) = @_; | |
174 | ||
175 | my $local_node = PVE::INotify::nodename(); | |
176 | ||
177 | die "not implemented - internal error" if $jobcfg->{type} ne 'local'; | |
178 | ||
179 | my $dc_conf = PVE::Cluster::cfs_read_file('datacenter.cfg'); | |
180 | ||
181 | my $migration_network; | |
182 | my $migration_type = 'secure'; | |
183 | if (my $mc = $dc_conf->{migration}) { | |
184 | $migration_network = $mc->{network}; | |
185 | $migration_type = $mc->{type} if defined($mc->{type}); | |
186 | } | |
187 | ||
188 | my $jobid = $jobcfg->{id}; | |
189 | my $storecfg = PVE::Storage::config(); | |
190 | my $last_sync = $state->{last_sync}; | |
191 | ||
192 | die "start time before last sync ($start_time <= $last_sync) - abort sync\n" | |
193 | if $start_time <= $last_sync; | |
194 | ||
195 | my $vmid = $jobcfg->{guest}; | |
a6538c1e DM |
196 | |
197 | my $conf = $guest_class->load_config($vmid); | |
198 | my ($running, $freezefs) = $guest_class->__snapshot_check_freeze_needed($vmid, $conf, 0); | |
c324e907 | 199 | my $volumes = $guest_class->get_replicatable_volumes($storecfg, $vmid, $conf, defined($jobcfg->{remove_job})); |
a6538c1e DM |
200 | |
201 | my $sorted_volids = [ sort keys %$volumes ]; | |
202 | ||
203 | $running //= 0; # to avoid undef warnings from logfunc | |
204 | ||
6358ffe1 DM |
205 | my $guest_name = $guest_class->guest_type() . ' ' . $vmid; |
206 | ||
207 | $logfunc->("guest => $guest_name, running => $running"); | |
a6538c1e DM |
208 | $logfunc->("volumes => " . join(',', @$sorted_volids)); |
209 | ||
210 | if (my $remove_job = $jobcfg->{remove_job}) { | |
211 | ||
212 | $logfunc->("start job removal - mode '${remove_job}'"); | |
213 | ||
214 | if ($remove_job eq 'full' && $jobcfg->{target} ne $local_node) { | |
215 | # remove all remote volumes | |
216 | my $ssh_info = PVE::Cluster::get_ssh_info($jobcfg->{target}); | |
217 | remote_prepare_local_job($ssh_info, $jobid, $vmid, [], $state->{storeid_list}, 0, undef, 1, $logfunc); | |
218 | ||
219 | } | |
220 | # remove all local replication snapshots (lastsync => 0) | |
221 | prepare($storecfg, $sorted_volids, $jobid, 0, undef, $logfunc); | |
222 | ||
223 | PVE::ReplicationConfig::delete_job($jobid); # update config | |
224 | $logfunc->("job removed"); | |
225 | ||
5899ebbd | 226 | return undef; |
a6538c1e DM |
227 | } |
228 | ||
229 | my $ssh_info = PVE::Cluster::get_ssh_info($jobcfg->{target}, $migration_network); | |
230 | ||
a6538c1e DM |
231 | my $parent_snapname = $conf->{parent}; |
232 | ||
e4f63016 DM |
233 | my ($base_snapshots, $last_snapshots, $last_sync_snapname) = find_common_replication_snapshot( |
234 | $ssh_info, $jobid, $vmid, $storecfg, $sorted_volids, $state->{storeid_list}, $last_sync, $parent_snapname, $logfunc); | |
a6538c1e DM |
235 | |
236 | my $storeid_hash = {}; | |
237 | foreach my $volid (@$sorted_volids) { | |
238 | my ($storeid) = PVE::Storage::parse_volume_id($volid); | |
239 | $storeid_hash->{$storeid} = 1; | |
240 | } | |
241 | $state->{storeid_list} = [ sort keys %$storeid_hash ]; | |
242 | ||
243 | # freeze filesystem for data consistency | |
244 | if ($freezefs) { | |
245 | $logfunc->("freeze guest filesystem"); | |
246 | $guest_class->__snapshot_freeze($vmid, 0); | |
247 | } | |
248 | ||
249 | # make snapshot of all volumes | |
e4f63016 DM |
250 | my $sync_snapname = |
251 | PVE::ReplicationState::replication_snapshot_name($jobid, $start_time); | |
252 | ||
a6538c1e DM |
253 | my $replicate_snapshots = {}; |
254 | eval { | |
255 | foreach my $volid (@$sorted_volids) { | |
256 | $logfunc->("create snapshot '${sync_snapname}' on $volid"); | |
257 | PVE::Storage::volume_snapshot($storecfg, $volid, $sync_snapname); | |
258 | $replicate_snapshots->{$volid} = 1; | |
259 | } | |
260 | }; | |
261 | my $err = $@; | |
262 | ||
5e93f430 | 263 | # thaw immediately |
a6538c1e | 264 | if ($freezefs) { |
5e93f430 | 265 | $logfunc->("thaw guest filesystem"); |
a6538c1e DM |
266 | $guest_class->__snapshot_freeze($vmid, 1); |
267 | } | |
268 | ||
269 | my $cleanup_local_snapshots = sub { | |
270 | my ($volid_hash, $snapname) = @_; | |
271 | foreach my $volid (sort keys %$volid_hash) { | |
272 | $logfunc->("delete previous replication snapshot '$snapname' on $volid"); | |
273 | eval { PVE::Storage::volume_snapshot_delete($storecfg, $volid, $snapname); }; | |
274 | warn $@ if $@; | |
275 | } | |
276 | }; | |
277 | ||
278 | if ($err) { | |
279 | $cleanup_local_snapshots->($replicate_snapshots, $sync_snapname); # try to cleanup | |
280 | die $err; | |
281 | } | |
282 | ||
283 | eval { | |
284 | ||
285 | my $rate = $jobcfg->{rate}; | |
286 | my $insecure = $migration_type eq 'insecure'; | |
287 | ||
288 | foreach my $volid (@$sorted_volids) { | |
289 | my $base_snapname; | |
290 | ||
e4f63016 DM |
291 | if (defined($base_snapname = $base_snapshots->{$volid})) { |
292 | $logfunc->("incremental sync '$volid' ($base_snapname => $sync_snapname)"); | |
293 | } else { | |
294 | $logfunc->("full sync '$volid' ($sync_snapname)"); | |
a6538c1e DM |
295 | } |
296 | ||
aa0d516f | 297 | replicate_volume($ssh_info, $storecfg, $volid, $base_snapname, $sync_snapname, $rate, $insecure, $logfunc); |
a6538c1e DM |
298 | } |
299 | }; | |
300 | $err = $@; | |
301 | ||
302 | if ($err) { | |
303 | $cleanup_local_snapshots->($replicate_snapshots, $sync_snapname); # try to cleanup | |
304 | # we do not cleanup the remote side here - this is done in | |
305 | # next run of prepare_local_job | |
306 | die $err; | |
307 | } | |
308 | ||
309 | # remove old snapshots because they are no longer needed | |
310 | $cleanup_local_snapshots->($last_snapshots, $last_sync_snapname); | |
311 | ||
ce22af08 WL |
312 | eval { |
313 | remote_finalize_local_job($ssh_info, $jobid, $vmid, $sorted_volids, $start_time, $logfunc); | |
314 | }; | |
a6538c1e | 315 | |
ce22af08 WL |
316 | # old snapshots will removed by next run from prepare_local_job. |
317 | if ($err = $@) { | |
318 | # warn is for syslog/journal. | |
319 | warn $err; | |
320 | ||
321 | # logfunc will written in replication log. | |
322 | $logfunc->("delete stale replication snapshot error: err"); | |
323 | } | |
5899ebbd DM |
324 | |
325 | return $volumes; | |
a6538c1e DM |
326 | } |
327 | ||
328 | my $run_replication_nolock = sub { | |
ac02a68e | 329 | my ($guest_class, $jobcfg, $iteration, $start_time, $logfunc, $verbose) = @_; |
a6538c1e DM |
330 | |
331 | my $jobid = $jobcfg->{id}; | |
332 | ||
5899ebbd DM |
333 | my $volumes; |
334 | ||
a6538c1e DM |
335 | # we normaly write errors into the state file, |
336 | # but we also catch unexpected errors and log them to syslog | |
337 | # (for examply when there are problems writing the state file) | |
a6538c1e | 338 | |
ac02a68e WL |
339 | my $state = PVE::ReplicationState::read_job_state($jobcfg); |
340 | ||
341 | PVE::ReplicationState::record_job_start($jobcfg, $state, $start_time, $iteration); | |
a6538c1e | 342 | |
ac02a68e | 343 | my $t0 = [gettimeofday]; |
a6538c1e | 344 | |
ac02a68e WL |
345 | mkdir $PVE::ReplicationState::replicate_logdir; |
346 | my $logfile = PVE::ReplicationState::job_logfile_name($jobid); | |
347 | open(my $logfd, '>', $logfile) || | |
348 | die "unable to open replication log '$logfile' - $!\n"; | |
a6538c1e | 349 | |
ac02a68e WL |
350 | my $logfunc_wrapper = sub { |
351 | my ($msg) = @_; | |
a6538c1e | 352 | |
ac02a68e WL |
353 | my $ctime = get_log_time(); |
354 | print $logfd "$ctime $jobid: $msg\n"; | |
355 | if ($logfunc) { | |
356 | if ($verbose) { | |
357 | $logfunc->("$ctime $jobid: $msg"); | |
358 | } else { | |
359 | $logfunc->($msg); | |
3ec43aaf | 360 | } |
ac02a68e WL |
361 | } |
362 | }; | |
a6538c1e | 363 | |
ac02a68e | 364 | $logfunc_wrapper->("start replication job"); |
a6538c1e | 365 | |
ac02a68e WL |
366 | eval { |
367 | $volumes = replicate($guest_class, $jobcfg, $state, $start_time, $logfunc_wrapper); | |
368 | }; | |
369 | my $err = $@; | |
a6538c1e | 370 | |
ac02a68e WL |
371 | if ($err) { |
372 | my $msg = "end replication job with error: $err"; | |
373 | chomp $msg; | |
374 | $logfunc_wrapper->($msg); | |
375 | } else { | |
376 | $logfunc_wrapper->("end replication job"); | |
377 | } | |
a6538c1e | 378 | |
ac02a68e | 379 | PVE::ReplicationState::record_job_end($jobcfg, $state, $start_time, tv_interval($t0), $err); |
c17dcb3e | 380 | |
ac02a68e | 381 | close($logfd); |
1b82f171 | 382 | |
ac02a68e | 383 | die $err if $err; |
5899ebbd DM |
384 | |
385 | return $volumes; | |
a6538c1e DM |
386 | }; |
387 | ||
388 | sub run_replication { | |
ac02a68e | 389 | my ($guest_class, $jobcfg, $iteration, $start_time, $logfunc, $verbose) = @_; |
a6538c1e | 390 | |
5899ebbd DM |
391 | my $volumes; |
392 | ||
ac02a68e WL |
393 | my $timeout = 2; # do not wait too long - we repeat periodically anyways |
394 | $volumes = PVE::GuestHelpers::guest_migration_lock( | |
395 | $jobcfg->{guest}, $timeout, $run_replication_nolock, | |
396 | $guest_class, $jobcfg, $iteration, $start_time, $logfunc, $verbose); | |
397 | ||
5899ebbd | 398 | return $volumes; |
a6538c1e DM |
399 | } |
400 | ||
401 | 1; |