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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); | |
8 | ||
9 | use PVE::INotify; | |
10 | use PVE::ProcFSTools; | |
11 | use PVE::Tools; | |
12 | use PVE::Cluster; | |
13 | use PVE::Storage; | |
14 | use PVE::GuestHelpers; | |
15 | use PVE::ReplicationConfig; | |
16 | use PVE::ReplicationState; | |
17 | ||
18 | ||
19 | # regression tests should overwrite this | |
20 | sub get_log_time { | |
21 | ||
22 | return time(); | |
23 | } | |
24 | ||
e4f63016 DM |
25 | # Find common base replication snapshot, available on local and remote side. |
26 | # Note: this also removes stale replication snapshots | |
27 | sub find_common_replication_snapshot { | |
28 | my ($ssh_info, $jobid, $vmid, $storecfg, $volumes, $storeid_list, $last_sync, $parent_snapname, $logfunc) = @_; | |
29 | ||
30 | my $last_sync_snapname = | |
31 | PVE::ReplicationState::replication_snapshot_name($jobid, $last_sync); | |
32 | ||
33 | # test if we have a replication_ snapshot from last sync | |
34 | # and remove all other/stale replication snapshots | |
35 | ||
36 | my $last_snapshots = prepare( | |
37 | $storecfg, $volumes, $jobid, $last_sync, $parent_snapname, $logfunc); | |
38 | ||
39 | # prepare remote side | |
40 | my $remote_snapshots = remote_prepare_local_job( | |
41 | $ssh_info, $jobid, $vmid, $volumes, $storeid_list, $last_sync, $parent_snapname, 0, $logfunc); | |
42 | ||
43 | my $base_snapshots = {}; | |
44 | ||
45 | foreach my $volid (@$volumes) { | |
46 | my $base_snapname; | |
47 | ||
48 | if (defined($last_snapshots->{$volid}) && defined($remote_snapshots->{$volid})) { | |
49 | if ($last_snapshots->{$volid}->{$last_sync_snapname} && | |
50 | $remote_snapshots->{$volid}->{$last_sync_snapname}) { | |
51 | $base_snapshots->{$volid} = $last_sync_snapname; | |
52 | } elsif (defined($parent_snapname) && | |
53 | ($last_snapshots->{$volid}->{$parent_snapname} && | |
54 | $remote_snapshots->{$volid}->{$parent_snapname})) { | |
55 | $base_snapshots->{$volid} = $parent_snapname; | |
56 | } | |
57 | } | |
58 | } | |
59 | ||
60 | return ($base_snapshots, $last_snapshots, $last_sync_snapname); | |
61 | } | |
62 | ||
a6538c1e DM |
63 | sub remote_prepare_local_job { |
64 | my ($ssh_info, $jobid, $vmid, $volumes, $storeid_list, $last_sync, $parent_snapname, $force, $logfunc) = @_; | |
65 | ||
66 | my $ssh_cmd = PVE::Cluster::ssh_info_to_command($ssh_info); | |
67 | my $cmd = [@$ssh_cmd, '--', 'pvesr', 'prepare-local-job', $jobid]; | |
68 | push @$cmd, '--scan', join(',', @$storeid_list) if scalar(@$storeid_list); | |
69 | push @$cmd, @$volumes if scalar(@$volumes); | |
70 | ||
71 | push @$cmd, '--last_sync', $last_sync; | |
72 | push @$cmd, '--parent_snapname', $parent_snapname | |
73 | if $parent_snapname; | |
74 | push @$cmd, '--force' if $force; | |
75 | ||
76 | my $remote_snapshots; | |
77 | ||
78 | my $parser = sub { | |
79 | my $line = shift; | |
80 | $remote_snapshots = JSON::decode_json($line); | |
81 | }; | |
82 | ||
83 | my $logger = sub { | |
84 | my $line = shift; | |
85 | chomp $line; | |
86 | $logfunc->("(remote_prepare_local_job) $line"); | |
87 | }; | |
88 | ||
89 | PVE::Tools::run_command($cmd, outfunc => $parser, errfunc => $logger); | |
90 | ||
91 | die "prepare remote node failed - no result\n" | |
92 | if !defined($remote_snapshots); | |
93 | ||
94 | return $remote_snapshots; | |
95 | } | |
96 | ||
97 | sub remote_finalize_local_job { | |
98 | my ($ssh_info, $jobid, $vmid, $volumes, $last_sync, $logfunc) = @_; | |
99 | ||
100 | my $ssh_cmd = PVE::Cluster::ssh_info_to_command($ssh_info); | |
101 | my $cmd = [@$ssh_cmd, '--', 'pvesr', 'finalize-local-job', $jobid, | |
102 | @$volumes, '--last_sync', $last_sync]; | |
103 | ||
104 | my $logger = sub { | |
105 | my $line = shift; | |
106 | chomp $line; | |
107 | $logfunc->("(remote_finalize_local_job) $line"); | |
108 | }; | |
109 | ||
110 | PVE::Tools::run_command($cmd, outfunc => $logger, errfunc => $logger); | |
111 | } | |
112 | ||
113 | # finds local replication snapshots from $last_sync | |
114 | # and removes all replication snapshots with other time stamps | |
115 | sub prepare { | |
116 | my ($storecfg, $volids, $jobid, $last_sync, $parent_snapname, $logfunc) = @_; | |
117 | ||
118 | $last_sync //= 0; | |
119 | ||
b499eccb DM |
120 | my ($prefix, $snapname); |
121 | ||
122 | if (defined($jobid)) { | |
123 | ($prefix, $snapname) = PVE::ReplicationState::replication_snapshot_name($jobid, $last_sync); | |
124 | } else { | |
125 | $prefix = '__replicate_'; | |
126 | } | |
a6538c1e DM |
127 | |
128 | my $last_snapshots = {}; | |
129 | my $cleaned_replicated_volumes = {}; | |
130 | foreach my $volid (@$volids) { | |
131 | my $list = PVE::Storage::volume_snapshot_list($storecfg, $volid); | |
132 | foreach my $snap (@$list) { | |
b499eccb DM |
133 | if ((defined($snapname) && ($snap eq $snapname)) || |
134 | (defined($parent_snapname) && ($snap eq $parent_snapname))) { | |
a6538c1e DM |
135 | $last_snapshots->{$volid}->{$snap} = 1; |
136 | } elsif ($snap =~ m/^\Q$prefix\E/) { | |
137 | $logfunc->("delete stale replication snapshot '$snap' on $volid"); | |
138 | PVE::Storage::volume_snapshot_delete($storecfg, $volid, $snap); | |
139 | $cleaned_replicated_volumes->{$volid} = 1; | |
140 | } | |
141 | } | |
142 | } | |
143 | ||
144 | return wantarray ? ($last_snapshots, $cleaned_replicated_volumes) : $last_snapshots; | |
145 | } | |
146 | ||
147 | sub replicate_volume { | |
148 | my ($ssh_info, $storecfg, $volid, $base_snapshot, $sync_snapname, $rate, $insecure) = @_; | |
149 | ||
150 | my ($storeid, $volname) = PVE::Storage::parse_volume_id($volid); | |
151 | ||
c475e16d | 152 | my $ratelimit_bps = int(1000000*$rate) if $rate; |
a6538c1e | 153 | PVE::Storage::storage_migrate($storecfg, $volid, $ssh_info, $storeid, $volname, |
7862a35c | 154 | $base_snapshot, $sync_snapname, $ratelimit_bps, $insecure); |
a6538c1e DM |
155 | } |
156 | ||
157 | ||
158 | sub replicate { | |
159 | my ($guest_class, $jobcfg, $state, $start_time, $logfunc) = @_; | |
160 | ||
161 | my $local_node = PVE::INotify::nodename(); | |
162 | ||
163 | die "not implemented - internal error" if $jobcfg->{type} ne 'local'; | |
164 | ||
165 | my $dc_conf = PVE::Cluster::cfs_read_file('datacenter.cfg'); | |
166 | ||
167 | my $migration_network; | |
168 | my $migration_type = 'secure'; | |
169 | if (my $mc = $dc_conf->{migration}) { | |
170 | $migration_network = $mc->{network}; | |
171 | $migration_type = $mc->{type} if defined($mc->{type}); | |
172 | } | |
173 | ||
174 | my $jobid = $jobcfg->{id}; | |
175 | my $storecfg = PVE::Storage::config(); | |
176 | my $last_sync = $state->{last_sync}; | |
177 | ||
178 | die "start time before last sync ($start_time <= $last_sync) - abort sync\n" | |
179 | if $start_time <= $last_sync; | |
180 | ||
181 | my $vmid = $jobcfg->{guest}; | |
182 | my $vmtype = $jobcfg->{vmtype}; | |
183 | ||
184 | my $conf = $guest_class->load_config($vmid); | |
185 | my ($running, $freezefs) = $guest_class->__snapshot_check_freeze_needed($vmid, $conf, 0); | |
c324e907 | 186 | my $volumes = $guest_class->get_replicatable_volumes($storecfg, $vmid, $conf, defined($jobcfg->{remove_job})); |
a6538c1e DM |
187 | |
188 | my $sorted_volids = [ sort keys %$volumes ]; | |
189 | ||
190 | $running //= 0; # to avoid undef warnings from logfunc | |
191 | ||
192 | $logfunc->("guest => $vmid, type => $vmtype, running => $running"); | |
193 | $logfunc->("volumes => " . join(',', @$sorted_volids)); | |
194 | ||
195 | if (my $remove_job = $jobcfg->{remove_job}) { | |
196 | ||
197 | $logfunc->("start job removal - mode '${remove_job}'"); | |
198 | ||
199 | if ($remove_job eq 'full' && $jobcfg->{target} ne $local_node) { | |
200 | # remove all remote volumes | |
201 | my $ssh_info = PVE::Cluster::get_ssh_info($jobcfg->{target}); | |
202 | remote_prepare_local_job($ssh_info, $jobid, $vmid, [], $state->{storeid_list}, 0, undef, 1, $logfunc); | |
203 | ||
204 | } | |
205 | # remove all local replication snapshots (lastsync => 0) | |
206 | prepare($storecfg, $sorted_volids, $jobid, 0, undef, $logfunc); | |
207 | ||
208 | PVE::ReplicationConfig::delete_job($jobid); # update config | |
209 | $logfunc->("job removed"); | |
210 | ||
5899ebbd | 211 | return undef; |
a6538c1e DM |
212 | } |
213 | ||
214 | my $ssh_info = PVE::Cluster::get_ssh_info($jobcfg->{target}, $migration_network); | |
215 | ||
a6538c1e DM |
216 | my $parent_snapname = $conf->{parent}; |
217 | ||
e4f63016 DM |
218 | my ($base_snapshots, $last_snapshots, $last_sync_snapname) = find_common_replication_snapshot( |
219 | $ssh_info, $jobid, $vmid, $storecfg, $sorted_volids, $state->{storeid_list}, $last_sync, $parent_snapname, $logfunc); | |
a6538c1e DM |
220 | |
221 | my $storeid_hash = {}; | |
222 | foreach my $volid (@$sorted_volids) { | |
223 | my ($storeid) = PVE::Storage::parse_volume_id($volid); | |
224 | $storeid_hash->{$storeid} = 1; | |
225 | } | |
226 | $state->{storeid_list} = [ sort keys %$storeid_hash ]; | |
227 | ||
228 | # freeze filesystem for data consistency | |
229 | if ($freezefs) { | |
230 | $logfunc->("freeze guest filesystem"); | |
231 | $guest_class->__snapshot_freeze($vmid, 0); | |
232 | } | |
233 | ||
234 | # make snapshot of all volumes | |
e4f63016 DM |
235 | my $sync_snapname = |
236 | PVE::ReplicationState::replication_snapshot_name($jobid, $start_time); | |
237 | ||
a6538c1e DM |
238 | my $replicate_snapshots = {}; |
239 | eval { | |
240 | foreach my $volid (@$sorted_volids) { | |
241 | $logfunc->("create snapshot '${sync_snapname}' on $volid"); | |
242 | PVE::Storage::volume_snapshot($storecfg, $volid, $sync_snapname); | |
243 | $replicate_snapshots->{$volid} = 1; | |
244 | } | |
245 | }; | |
246 | my $err = $@; | |
247 | ||
248 | # unfreeze immediately | |
249 | if ($freezefs) { | |
250 | $guest_class->__snapshot_freeze($vmid, 1); | |
251 | } | |
252 | ||
253 | my $cleanup_local_snapshots = sub { | |
254 | my ($volid_hash, $snapname) = @_; | |
255 | foreach my $volid (sort keys %$volid_hash) { | |
256 | $logfunc->("delete previous replication snapshot '$snapname' on $volid"); | |
257 | eval { PVE::Storage::volume_snapshot_delete($storecfg, $volid, $snapname); }; | |
258 | warn $@ if $@; | |
259 | } | |
260 | }; | |
261 | ||
262 | if ($err) { | |
263 | $cleanup_local_snapshots->($replicate_snapshots, $sync_snapname); # try to cleanup | |
264 | die $err; | |
265 | } | |
266 | ||
267 | eval { | |
268 | ||
269 | my $rate = $jobcfg->{rate}; | |
270 | my $insecure = $migration_type eq 'insecure'; | |
271 | ||
272 | foreach my $volid (@$sorted_volids) { | |
273 | my $base_snapname; | |
274 | ||
e4f63016 DM |
275 | if (defined($base_snapname = $base_snapshots->{$volid})) { |
276 | $logfunc->("incremental sync '$volid' ($base_snapname => $sync_snapname)"); | |
277 | } else { | |
278 | $logfunc->("full sync '$volid' ($sync_snapname)"); | |
a6538c1e DM |
279 | } |
280 | ||
a6538c1e DM |
281 | replicate_volume($ssh_info, $storecfg, $volid, $base_snapname, $sync_snapname, $rate, $insecure); |
282 | } | |
283 | }; | |
284 | $err = $@; | |
285 | ||
286 | if ($err) { | |
287 | $cleanup_local_snapshots->($replicate_snapshots, $sync_snapname); # try to cleanup | |
288 | # we do not cleanup the remote side here - this is done in | |
289 | # next run of prepare_local_job | |
290 | die $err; | |
291 | } | |
292 | ||
293 | # remove old snapshots because they are no longer needed | |
294 | $cleanup_local_snapshots->($last_snapshots, $last_sync_snapname); | |
295 | ||
296 | remote_finalize_local_job($ssh_info, $jobid, $vmid, $sorted_volids, $start_time, $logfunc); | |
297 | ||
298 | die $err if $err; | |
5899ebbd DM |
299 | |
300 | return $volumes; | |
a6538c1e DM |
301 | } |
302 | ||
303 | my $run_replication_nolock = sub { | |
304 | my ($guest_class, $jobcfg, $iteration, $start_time, $logfunc) = @_; | |
305 | ||
306 | my $jobid = $jobcfg->{id}; | |
307 | ||
5899ebbd DM |
308 | my $volumes; |
309 | ||
a6538c1e DM |
310 | # we normaly write errors into the state file, |
311 | # but we also catch unexpected errors and log them to syslog | |
312 | # (for examply when there are problems writing the state file) | |
313 | eval { | |
314 | my $state = PVE::ReplicationState::read_job_state($jobcfg); | |
315 | ||
c17dcb3e | 316 | PVE::ReplicationState::record_job_start($jobcfg, $state, $start_time, $iteration); |
a6538c1e | 317 | |
c17dcb3e | 318 | my $t0 = [gettimeofday]; |
a6538c1e DM |
319 | |
320 | mkdir $PVE::ReplicationState::replicate_logdir; | |
321 | my $logfile = PVE::ReplicationState::job_logfile_name($jobid); | |
322 | open(my $logfd, '>', $logfile) || | |
323 | die "unable to open replication log '$logfile' - $!\n"; | |
324 | ||
325 | my $logfunc_wrapper = sub { | |
326 | my ($msg) = @_; | |
327 | ||
328 | my $ctime = get_log_time(); | |
329 | print $logfd "$ctime $jobid: $msg\n"; | |
330 | $logfunc->("$ctime $jobid: $msg") if $logfunc; | |
331 | }; | |
332 | ||
333 | $logfunc_wrapper->("start replication job"); | |
334 | ||
335 | eval { | |
5899ebbd | 336 | $volumes = replicate($guest_class, $jobcfg, $state, $start_time, $logfunc_wrapper); |
a6538c1e DM |
337 | }; |
338 | my $err = $@; | |
339 | ||
a6538c1e DM |
340 | if ($err) { |
341 | chomp $err; | |
a6538c1e DM |
342 | $logfunc_wrapper->("end replication job with error: $err"); |
343 | } else { | |
344 | $logfunc_wrapper->("end replication job"); | |
a6538c1e DM |
345 | } |
346 | ||
c17dcb3e DM |
347 | PVE::ReplicationState::record_job_end($jobcfg, $state, $start_time, tv_interval($t0), $err); |
348 | ||
a6538c1e DM |
349 | close($logfd); |
350 | }; | |
351 | if (my $err = $@) { | |
352 | warn "$jobid: got unexpected replication job error - $err"; | |
353 | } | |
5899ebbd DM |
354 | |
355 | return $volumes; | |
a6538c1e DM |
356 | }; |
357 | ||
358 | sub run_replication { | |
359 | my ($guest_class, $jobcfg, $iteration, $start_time, $logfunc, $noerr) = @_; | |
360 | ||
5899ebbd DM |
361 | my $volumes; |
362 | ||
a6538c1e DM |
363 | eval { |
364 | my $timeout = 2; # do not wait too long - we repeat periodically anyways | |
5899ebbd | 365 | $volumes = PVE::GuestHelpers::guest_migration_lock( |
a6538c1e DM |
366 | $jobcfg->{guest}, $timeout, $run_replication_nolock, |
367 | $guest_class, $jobcfg, $iteration, $start_time, $logfunc); | |
368 | }; | |
369 | if (my $err = $@) { | |
370 | return undef if $noerr; | |
371 | die $err; | |
372 | } | |
5899ebbd | 373 | return $volumes; |
a6538c1e DM |
374 | } |
375 | ||
376 | 1; |