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