]>
Commit | Line | Data |
---|---|---|
5f095798 DM |
1 | package PVE::HA::LRM; |
2 | ||
3 | # Local Resource Manager | |
4 | ||
5 | use strict; | |
6 | use warnings; | |
c4a221bc | 7 | use POSIX qw(:sys_wait_h); |
5f095798 DM |
8 | |
9 | use PVE::SafeSyslog; | |
10 | use PVE::Tools; | |
a89ff919 | 11 | use PVE::HA::Tools ':exit_codes'; |
2a045f55 | 12 | use PVE::HA::Resources; |
5f095798 DM |
13 | |
14 | # Server can have several states: | |
15 | ||
16 | my $valid_states = { | |
ec911edd | 17 | wait_for_agent_lock => "waiting for agent lock", |
0bba8f60 | 18 | active => "got agent_lock", |
99278e06 | 19 | maintenance => "going into maintenance", |
5f095798 DM |
20 | lost_agent_lock => "lost agent_lock", |
21 | }; | |
22 | ||
21051707 TL |
23 | # we sleep ~10s per 'active' round, so if no services is available for >= 10 min we'd go in wait |
24 | # state givining up the watchdog and the LRM lock acquire voluntary, ensuring the WD can do no harm | |
25 | my $max_active_idle_rounds = 60; | |
26 | ||
5f095798 DM |
27 | sub new { |
28 | my ($this, $haenv) = @_; | |
29 | ||
30 | my $class = ref($this) || $this; | |
31 | ||
32 | my $self = bless { | |
33 | haenv => $haenv, | |
34 | status => { state => 'startup' }, | |
c4a221bc DM |
35 | workers => {}, |
36 | results => {}, | |
ea4443cc | 37 | restart_tries => {}, |
067cdf33 | 38 | shutdown_request => 0, |
116dea30 | 39 | shutdown_errors => 0, |
9c7d068b DM |
40 | # mode can be: active, reboot, shutdown, restart |
41 | mode => 'active', | |
3df15380 | 42 | cluster_state_update => 0, |
21051707 | 43 | active_idle_rounds => 0, |
5f095798 DM |
44 | }, $class; |
45 | ||
289e4784 | 46 | $self->set_local_status({ state => 'wait_for_agent_lock' }); |
9c7d068b | 47 | |
5f095798 DM |
48 | return $self; |
49 | } | |
50 | ||
51 | sub shutdown_request { | |
52 | my ($self) = @_; | |
53 | ||
f1be5b3a DM |
54 | return if $self->{shutdown_request}; # already in shutdown mode |
55 | ||
499f06e3 DM |
56 | my $haenv = $self->{haenv}; |
57 | ||
116dea30 DM |
58 | my $nodename = $haenv->nodename(); |
59 | ||
f65f41b9 | 60 | my ($shutdown, $reboot) = $haenv->is_node_shutdown(); |
499f06e3 | 61 | |
ba15a9b9 TL |
62 | my $dc_ha_cfg = $haenv->get_ha_settings(); |
63 | my $shutdown_policy = $dc_ha_cfg->{shutdown_policy} // 'conditional'; | |
64 | ||
7a20d688 TL |
65 | if ($shutdown) { # don't log this on service restart, only on node shutdown |
66 | $haenv->log('info', "got shutdown request with shutdown policy '$shutdown_policy'"); | |
67 | } | |
68 | ||
d2236278 | 69 | my $freeze_all; |
99278e06 | 70 | my $maintenance; |
ba15a9b9 TL |
71 | if ($shutdown_policy eq 'conditional') { |
72 | $freeze_all = $reboot; | |
73 | } elsif ($shutdown_policy eq 'freeze') { | |
74 | $freeze_all = 1; | |
75 | } elsif ($shutdown_policy eq 'failover') { | |
76 | $freeze_all = 0; | |
99278e06 TL |
77 | } elsif ($shutdown_policy eq 'migrate') { |
78 | $maintenance = 1; | |
ba15a9b9 | 79 | } else { |
d2236278 TL |
80 | $haenv->log('err', "unknown shutdown policy '$shutdown_policy', fall back to conditional"); |
81 | $freeze_all = $reboot; | |
ba15a9b9 TL |
82 | } |
83 | ||
99278e06 TL |
84 | if ($maintenance) { |
85 | # we get marked as unaivalable by the manager, then all services will | |
86 | # be migrated away, we'll still have the same "can we exit" clause than | |
87 | # a normal shutdown -> no running service on this node | |
88 | # FIXME: after X minutes, add shutdown command for remaining services, | |
89 | # e.g., if they have no alternative node??? | |
90 | } elsif ($shutdown) { | |
f65f41b9 TL |
91 | # *always* queue stop jobs for all services if the node shuts down, |
92 | # independent if it's a reboot or a poweroff, else we may corrupt | |
93 | # services or hinder node shutdown | |
116dea30 DM |
94 | my $ss = $self->{service_status}; |
95 | ||
96 | foreach my $sid (keys %$ss) { | |
97 | my $sd = $ss->{$sid}; | |
98 | next if !$sd->{node}; | |
99 | next if $sd->{node} ne $nodename; | |
c0edbd7e | 100 | # Note: use undef uid to mark shutdown/stop jobs |
116dea30 DM |
101 | $self->queue_resource_command($sid, undef, 'request_stop'); |
102 | } | |
f65f41b9 | 103 | } |
116dea30 | 104 | |
f65f41b9 | 105 | if ($shutdown) { |
41236dcf | 106 | my $shutdown_type = $reboot ? 'reboot' : 'shutdown'; |
99278e06 TL |
107 | if ($maintenance) { |
108 | $haenv->log('info', "$shutdown_type LRM, doing maintenance, removing this node from active list"); | |
109 | $self->{mode} = 'maintenance'; | |
110 | } elsif ($freeze_all) { | |
41236dcf | 111 | $haenv->log('info', "$shutdown_type LRM, stop and freeze all services"); |
f65f41b9 TL |
112 | $self->{mode} = 'restart'; |
113 | } else { | |
114 | $haenv->log('info', "shutdown LRM, stop all services"); | |
115 | $self->{mode} = 'shutdown'; | |
116 | } | |
499f06e3 DM |
117 | } else { |
118 | $haenv->log('info', "restart LRM, freeze all services"); | |
119 | $self->{mode} = 'restart'; | |
120 | } | |
9c7d068b | 121 | |
99278e06 | 122 | $self->{shutdown_request} = $haenv->get_time(); |
9c7d068b | 123 | |
a19f2576 | 124 | eval { $self->update_lrm_status() or die "not quorate?\n"; }; |
9c7d068b | 125 | if (my $err = $@) { |
5bd7aa54 | 126 | $self->log('err', "unable to update lrm status file - $err"); |
9c7d068b | 127 | } |
5f095798 DM |
128 | } |
129 | ||
130 | sub get_local_status { | |
131 | my ($self) = @_; | |
132 | ||
133 | return $self->{status}; | |
134 | } | |
135 | ||
136 | sub set_local_status { | |
137 | my ($self, $new) = @_; | |
138 | ||
139 | die "invalid state '$new->{state}'" if !$valid_states->{$new->{state}}; | |
140 | ||
141 | my $haenv = $self->{haenv}; | |
142 | ||
143 | my $old = $self->{status}; | |
144 | ||
289e4784 | 145 | # important: only update if if really changed |
5f095798 DM |
146 | return if $old->{state} eq $new->{state}; |
147 | ||
0bba8f60 | 148 | $haenv->log('info', "status change $old->{state} => $new->{state}"); |
5f095798 DM |
149 | |
150 | $new->{state_change_time} = $haenv->get_time(); | |
151 | ||
152 | $self->{status} = $new; | |
153 | } | |
154 | ||
9c7d068b DM |
155 | sub update_lrm_status { |
156 | my ($self) = @_; | |
157 | ||
5bd7aa54 DM |
158 | my $haenv = $self->{haenv}; |
159 | ||
79829202 | 160 | return 0 if !$haenv->quorate(); |
289e4784 TL |
161 | |
162 | my $lrm_status = { | |
331a9f00 | 163 | state => $self->{status}->{state}, |
9c7d068b DM |
164 | mode => $self->{mode}, |
165 | results => $self->{results}, | |
aa330d1c | 166 | timestamp => $haenv->get_time(), |
9c7d068b | 167 | }; |
289e4784 | 168 | |
5bd7aa54 DM |
169 | eval { $haenv->write_lrm_status($lrm_status); }; |
170 | if (my $err = $@) { | |
171 | $haenv->log('err', "unable to write lrm status file - $err"); | |
172 | return 0; | |
173 | } | |
174 | ||
175 | return 1; | |
9c7d068b DM |
176 | } |
177 | ||
8e940b68 TL |
178 | sub update_service_status { |
179 | my ($self) = @_; | |
180 | ||
181 | my $haenv = $self->{haenv}; | |
182 | ||
183 | my $ms = eval { $haenv->read_manager_status(); }; | |
184 | if (my $err = $@) { | |
185 | $haenv->log('err', "updating service status from manager failed: $err"); | |
186 | return undef; | |
187 | } else { | |
188 | $self->{service_status} = $ms->{service_status} || {}; | |
189 | return 1; | |
190 | } | |
191 | } | |
192 | ||
5f095798 DM |
193 | sub get_protected_ha_agent_lock { |
194 | my ($self) = @_; | |
195 | ||
196 | my $haenv = $self->{haenv}; | |
197 | ||
198 | my $count = 0; | |
199 | my $starttime = $haenv->get_time(); | |
200 | ||
201 | for (;;) { | |
289e4784 | 202 | |
5f095798 DM |
203 | if ($haenv->get_ha_agent_lock()) { |
204 | if ($self->{ha_agent_wd}) { | |
205 | $haenv->watchdog_update($self->{ha_agent_wd}); | |
206 | } else { | |
207 | my $wfh = $haenv->watchdog_open(); | |
208 | $self->{ha_agent_wd} = $wfh; | |
209 | } | |
210 | return 1; | |
211 | } | |
289e4784 | 212 | |
5f095798 DM |
213 | last if ++$count > 5; # try max 5 time |
214 | ||
215 | my $delay = $haenv->get_time() - $starttime; | |
216 | last if $delay > 5; # for max 5 seconds | |
217 | ||
218 | $haenv->sleep(1); | |
219 | } | |
289e4784 | 220 | |
5f095798 DM |
221 | return 0; |
222 | } | |
223 | ||
21051707 TL |
224 | # only cares if any service has the local node as their node, independent of which req.state it is |
225 | sub has_configured_service_on_local_node { | |
226 | my ($self) = @_; | |
227 | ||
228 | my $haenv = $self->{haenv}; | |
229 | my $nodename = $haenv->nodename(); | |
230 | ||
231 | my $ss = $self->{service_status}; | |
232 | foreach my $sid (keys %$ss) { | |
233 | my $sd = $ss->{$sid}; | |
234 | next if !$sd->{node} || $sd->{node} ne $nodename; | |
235 | ||
236 | return 1; | |
237 | } | |
238 | return 0; | |
239 | } | |
240 | ||
546e2f1f DM |
241 | sub active_service_count { |
242 | my ($self) = @_; | |
289e4784 | 243 | |
546e2f1f DM |
244 | my $haenv = $self->{haenv}; |
245 | ||
246 | my $nodename = $haenv->nodename(); | |
247 | ||
248 | my $ss = $self->{service_status}; | |
249 | ||
250 | my $count = 0; | |
289e4784 | 251 | |
546e2f1f DM |
252 | foreach my $sid (keys %$ss) { |
253 | my $sd = $ss->{$sid}; | |
254 | next if !$sd->{node}; | |
255 | next if $sd->{node} ne $nodename; | |
256 | my $req_state = $sd->{state}; | |
257 | next if !defined($req_state); | |
258 | next if $req_state eq 'stopped'; | |
9c7d068b | 259 | next if $req_state eq 'freeze'; |
38545741 TL |
260 | # erroneous services are not managed by HA, don't count them as active |
261 | next if $req_state eq 'error'; | |
546e2f1f DM |
262 | |
263 | $count++; | |
264 | } | |
289e4784 | 265 | |
546e2f1f DM |
266 | return $count; |
267 | } | |
5bd7aa54 DM |
268 | |
269 | my $wrote_lrm_status_at_startup = 0; | |
270 | ||
5f095798 DM |
271 | sub do_one_iteration { |
272 | my ($self) = @_; | |
273 | ||
274 | my $haenv = $self->{haenv}; | |
275 | ||
da6f0416 TL |
276 | $haenv->loop_start_hook(); |
277 | ||
3df15380 TL |
278 | $self->{cluster_state_update} = $haenv->cluster_state_update(); |
279 | ||
da6f0416 TL |
280 | my $res = $self->work(); |
281 | ||
282 | $haenv->loop_end_hook(); | |
283 | ||
284 | return $res; | |
285 | } | |
286 | ||
abc1499b TL |
287 | # NOTE: this is disabling the self-fence mechanism, so it must NOT be called with active services |
288 | # It's normally *only* OK on graceful shutdown (with no services, or all services frozen) | |
289 | my sub give_up_watchdog_protection { | |
290 | my ($self) = @_; | |
291 | ||
292 | if ($self->{ha_agent_wd}) { | |
293 | $self->{haenv}->watchdog_close($self->{ha_agent_wd}); | |
294 | delete $self->{ha_agent_wd}; # only delete after close! | |
295 | } | |
296 | } | |
297 | ||
da6f0416 TL |
298 | sub work { |
299 | my ($self) = @_; | |
300 | ||
301 | my $haenv = $self->{haenv}; | |
302 | ||
c5ec095f | 303 | if (!$wrote_lrm_status_at_startup) { |
79829202 | 304 | if ($self->update_lrm_status()) { |
c5ec095f DM |
305 | $wrote_lrm_status_at_startup = 1; |
306 | } else { | |
307 | # do nothing | |
308 | $haenv->sleep(5); | |
309 | return $self->{shutdown_request} ? 0 : 1; | |
310 | } | |
5bd7aa54 | 311 | } |
289e4784 | 312 | |
5f095798 DM |
313 | my $status = $self->get_local_status(); |
314 | my $state = $status->{state}; | |
315 | ||
8e940b68 | 316 | $self->update_service_status(); |
067cdf33 | 317 | |
49777d09 | 318 | my $fence_request = PVE::HA::Tools::count_fenced_services($self->{service_status}, $haenv->nodename()); |
289e4784 TL |
319 | |
320 | # do state changes first | |
5f095798 DM |
321 | |
322 | my $ctime = $haenv->get_time(); | |
323 | ||
b0bf08a9 | 324 | if ($state eq 'wait_for_agent_lock') { |
5f095798 | 325 | |
546e2f1f | 326 | my $service_count = $self->active_service_count(); |
5f095798 | 327 | |
067cdf33 | 328 | if (!$fence_request && $service_count && $haenv->quorate()) { |
0bba8f60 DM |
329 | if ($self->get_protected_ha_agent_lock()) { |
330 | $self->set_local_status({ state => 'active' }); | |
5f095798 DM |
331 | } |
332 | } | |
289e4784 | 333 | |
5f095798 DM |
334 | } elsif ($state eq 'lost_agent_lock') { |
335 | ||
067cdf33 | 336 | if (!$fence_request && $haenv->quorate()) { |
0bba8f60 DM |
337 | if ($self->get_protected_ha_agent_lock()) { |
338 | $self->set_local_status({ state => 'active' }); | |
5f095798 DM |
339 | } |
340 | } | |
341 | ||
0bba8f60 | 342 | } elsif ($state eq 'active') { |
5f095798 | 343 | |
289e4784 | 344 | if ($fence_request) { |
067cdf33 | 345 | $haenv->log('err', "node need to be fenced - releasing agent_lock\n"); |
289e4784 | 346 | $self->set_local_status({ state => 'lost_agent_lock'}); |
067cdf33 | 347 | } elsif (!$self->get_protected_ha_agent_lock()) { |
5f095798 | 348 | $self->set_local_status({ state => 'lost_agent_lock'}); |
99278e06 TL |
349 | } elsif ($self->{mode} eq 'maintenance') { |
350 | $self->set_local_status({ state => 'maintenance'}); | |
21051707 TL |
351 | } else { |
352 | if (!$self->has_configured_service_on_local_node() && !$self->run_workers()) { | |
353 | # no active service configured for this node and all (old) workers are done | |
354 | $self->{active_idle_rounds}++; | |
355 | if ($self->{active_idle_rounds} > $max_active_idle_rounds) { | |
356 | $haenv->log('info', "node had no service configured for $max_active_idle_rounds rounds, going idle.\n"); | |
357 | # safety: no active service & no running worker for quite some time -> OK | |
358 | $haenv->release_ha_agent_lock(); | |
359 | give_up_watchdog_protection($self); | |
360 | $self->set_local_status({ state => 'wait_for_agent_lock'}); | |
361 | $self->{active_idle_rounds} = 0; | |
362 | } | |
363 | } elsif ($self->{active_idle_rounds}) { | |
364 | $self->{active_idle_rounds} = 0; | |
365 | } | |
99278e06 TL |
366 | } |
367 | } elsif ($state eq 'maintenance') { | |
368 | ||
369 | if ($fence_request) { | |
370 | $haenv->log('err', "node need to be fenced during maintenance mode - releasing agent_lock\n"); | |
371 | $self->set_local_status({ state => 'lost_agent_lock'}); | |
372 | } elsif (!$self->get_protected_ha_agent_lock()) { | |
373 | $self->set_local_status({ state => 'lost_agent_lock'}); | |
5f095798 DM |
374 | } |
375 | } | |
376 | ||
377 | $status = $self->get_local_status(); | |
378 | $state = $status->{state}; | |
379 | ||
380 | # do work | |
381 | ||
382 | if ($state eq 'wait_for_agent_lock') { | |
383 | ||
384 | return 0 if $self->{shutdown_request}; | |
289e4784 | 385 | |
79829202 | 386 | $self->update_lrm_status(); |
289e4784 | 387 | |
5f095798 | 388 | $haenv->sleep(5); |
289e4784 | 389 | |
0bba8f60 | 390 | } elsif ($state eq 'active') { |
5f095798 DM |
391 | |
392 | my $startime = $haenv->get_time(); | |
393 | ||
394 | my $max_time = 10; | |
395 | ||
396 | my $shutdown = 0; | |
397 | ||
398 | # do work (max_time seconds) | |
399 | eval { | |
400 | # fixme: set alert timer | |
401 | ||
8e940b68 TL |
402 | # if we could not get the current service status there's no point |
403 | # in doing anything, try again next round. | |
404 | return if !$self->update_service_status(); | |
405 | ||
5f095798 DM |
406 | if ($self->{shutdown_request}) { |
407 | ||
499f06e3 | 408 | if ($self->{mode} eq 'restart') { |
5f095798 | 409 | |
499f06e3 | 410 | my $service_count = $self->active_service_count(); |
5f095798 | 411 | |
499f06e3 | 412 | if ($service_count == 0) { |
116dea30 | 413 | if ($self->run_workers() == 0) { |
abc1499b TL |
414 | # safety: no active services or workers -> OK |
415 | give_up_watchdog_protection($self); | |
116dea30 | 416 | $shutdown = 1; |
e23f674c TL |
417 | |
418 | # restart with no or freezed services, release the lock | |
419 | $haenv->release_ha_agent_lock(); | |
116dea30 DM |
420 | } |
421 | } | |
422 | } else { | |
423 | ||
424 | if ($self->run_workers() == 0) { | |
425 | if ($self->{shutdown_errors} == 0) { | |
abc1499b TL |
426 | # safety: no active services and LRM shutdown -> OK |
427 | give_up_watchdog_protection($self); | |
0e5b1a43 TL |
428 | |
429 | # shutdown with all services stopped thus release the lock | |
430 | $haenv->release_ha_agent_lock(); | |
499f06e3 | 431 | } |
5f095798 | 432 | |
499f06e3 DM |
433 | $shutdown = 1; |
434 | } | |
5f095798 | 435 | } |
c4a221bc | 436 | } else { |
724bd3f3 TL |
437 | if (!$self->{cluster_state_update}) { |
438 | # update failed but we could still renew our lock (cfs restart?), | |
439 | # safely skip manage and expect to update just fine next round | |
440 | $haenv->log('notice', "temporary inconsistent cluster state " . | |
441 | "(cfs restart?), skip round"); | |
442 | return; | |
443 | } | |
c4a221bc DM |
444 | |
445 | $self->manage_resources(); | |
067cdf33 | 446 | |
5f095798 DM |
447 | } |
448 | }; | |
449 | if (my $err = $@) { | |
450 | $haenv->log('err', "got unexpected error - $err"); | |
451 | } | |
452 | ||
79829202 | 453 | $self->update_lrm_status(); |
289e4784 | 454 | |
5f095798 DM |
455 | return 0 if $shutdown; |
456 | ||
457 | $haenv->sleep_until($startime + $max_time); | |
458 | ||
459 | } elsif ($state eq 'lost_agent_lock') { | |
289e4784 | 460 | |
abc1499b | 461 | # NOTE: watchdog is active an will trigger soon! |
5f095798 | 462 | # so we hope to get the lock back soon! |
5f095798 DM |
463 | if ($self->{shutdown_request}) { |
464 | ||
546e2f1f | 465 | my $service_count = $self->active_service_count(); |
5f095798 | 466 | |
546e2f1f | 467 | if ($service_count > 0) { |
289e4784 | 468 | $haenv->log('err', "get shutdown request in state 'lost_agent_lock' - " . |
546e2f1f | 469 | "detected $service_count running services"); |
5f095798 | 470 | |
c5c7faf6 TL |
471 | if ($self->{mode} eq 'restart') { |
472 | my $state_mt = $self->{status}->{state_change_time}; | |
473 | ||
474 | # watchdog should have already triggered, so either it's set | |
475 | # set to noboot or it failed. As we are in restart mode, and | |
476 | # have infinity stoptimeout -> exit now - we don't touch services | |
477 | # or change state, so this is save, relatively speaking | |
478 | if (($haenv->get_time() - $state_mt) > 90) { | |
479 | $haenv->log('err', "lost agent lock and restart request for over 90 seconds - giving up!"); | |
480 | return 0; | |
481 | } | |
482 | } | |
546e2f1f | 483 | } else { |
abc1499b TL |
484 | # safety: all services are stopped, so we can close the watchdog |
485 | give_up_watchdog_protection($self); | |
289e4784 | 486 | |
546e2f1f | 487 | return 0; |
5f095798 | 488 | } |
5f095798 DM |
489 | } |
490 | ||
b0bf08a9 DM |
491 | $haenv->sleep(5); |
492 | ||
99278e06 TL |
493 | } elsif ($state eq 'maintenance') { |
494 | ||
495 | my $startime = $haenv->get_time(); | |
496 | return if !$self->update_service_status(); | |
497 | ||
498 | # wait until all active services moved away | |
499 | my $service_count = $self->active_service_count(); | |
500 | ||
501 | my $exit_lrm = 0; | |
502 | ||
503 | if ($self->{shutdown_request}) { | |
504 | if ($service_count == 0 && $self->run_workers() == 0) { | |
abc1499b TL |
505 | # safety: going into maintenance and all active services got moved -> OK |
506 | give_up_watchdog_protection($self); | |
99278e06 TL |
507 | |
508 | $exit_lrm = 1; | |
509 | ||
510 | # restart with no or freezed services, release the lock | |
511 | $haenv->release_ha_agent_lock(); | |
512 | } | |
513 | } | |
514 | ||
515 | $self->manage_resources() if !$exit_lrm; | |
516 | ||
517 | $self->update_lrm_status(); | |
518 | ||
519 | return 0 if $exit_lrm; | |
520 | ||
521 | $haenv->sleep_until($startime + 5); | |
522 | ||
5f095798 DM |
523 | } else { |
524 | ||
525 | die "got unexpected status '$state'\n"; | |
526 | ||
527 | } | |
528 | ||
529 | return 1; | |
530 | } | |
531 | ||
116dea30 | 532 | sub run_workers { |
c4a221bc DM |
533 | my ($self) = @_; |
534 | ||
535 | my $haenv = $self->{haenv}; | |
536 | ||
f31b7e94 | 537 | my $starttime = $haenv->get_time(); |
c4a221bc | 538 | |
a28fa330 TL |
539 | # number of workers to start, if 0 we exec the command directly witouth forking |
540 | my $max_workers = $haenv->get_max_workers(); | |
c4a221bc | 541 | |
6dbf93a0 | 542 | my $sc = $haenv->read_service_config(); |
f31b7e94 DM |
543 | |
544 | while (($haenv->get_time() - $starttime) < 5) { | |
c4a221bc DM |
545 | my $count = $self->check_active_workers(); |
546 | ||
a5e4bef4 | 547 | foreach my $sid (sort keys %{$self->{workers}}) { |
a28fa330 TL |
548 | last if $count >= $max_workers && $max_workers > 0; |
549 | ||
c4a221bc DM |
550 | my $w = $self->{workers}->{$sid}; |
551 | if (!$w->{pid}) { | |
a28fa330 TL |
552 | # only fork if we may else call exec_resource_agent |
553 | # directly (e.g. for regression tests) | |
554 | if ($max_workers > 0) { | |
f31b7e94 DM |
555 | my $pid = fork(); |
556 | if (!defined($pid)) { | |
557 | $haenv->log('err', "fork worker failed"); | |
558 | $count = 0; last; # abort, try later | |
559 | } elsif ($pid == 0) { | |
a2aae08a TL |
560 | $haenv->after_fork(); # cleanup |
561 | ||
f31b7e94 DM |
562 | # do work |
563 | my $res = -1; | |
564 | eval { | |
3ac1ee6b | 565 | $res = $self->exec_resource_agent($sid, $sc->{$sid}, $w->{state}, $w->{params}); |
f31b7e94 DM |
566 | }; |
567 | if (my $err = $@) { | |
568 | $haenv->log('err', $err); | |
569 | POSIX::_exit(-1); | |
289e4784 TL |
570 | } |
571 | POSIX::_exit($res); | |
f31b7e94 DM |
572 | } else { |
573 | $count++; | |
574 | $w->{pid} = $pid; | |
575 | } | |
576 | } else { | |
c4a221bc DM |
577 | my $res = -1; |
578 | eval { | |
3ac1ee6b | 579 | $res = $self->exec_resource_agent($sid, $sc->{$sid}, $w->{state}, $w->{params}); |
b33b5743 | 580 | $res = $res << 8 if $res > 0; |
c4a221bc DM |
581 | }; |
582 | if (my $err = $@) { | |
f31b7e94 | 583 | $haenv->log('err', $err); |
116dea30 DM |
584 | } |
585 | if (defined($w->{uid})) { | |
586 | $self->resource_command_finished($sid, $w->{uid}, $res); | |
587 | } else { | |
588 | $self->stop_command_finished($sid, $res); | |
589 | } | |
c4a221bc DM |
590 | } |
591 | } | |
592 | } | |
593 | ||
594 | last if !$count; | |
595 | ||
f31b7e94 | 596 | $haenv->sleep(1); |
c4a221bc | 597 | } |
116dea30 DM |
598 | |
599 | return scalar(keys %{$self->{workers}}); | |
600 | } | |
601 | ||
602 | sub manage_resources { | |
603 | my ($self) = @_; | |
604 | ||
605 | my $haenv = $self->{haenv}; | |
606 | ||
607 | my $nodename = $haenv->nodename(); | |
608 | ||
609 | my $ss = $self->{service_status}; | |
610 | ||
5a28da91 TL |
611 | foreach my $sid (keys %{$self->{restart_tries}}) { |
612 | delete $self->{restart_tries}->{$sid} if !$ss->{$sid}; | |
613 | } | |
614 | ||
116dea30 DM |
615 | foreach my $sid (keys %$ss) { |
616 | my $sd = $ss->{$sid}; | |
617 | next if !$sd->{node}; | |
618 | next if !$sd->{uid}; | |
619 | next if $sd->{node} ne $nodename; | |
620 | my $req_state = $sd->{state}; | |
621 | next if !defined($req_state); | |
622 | next if $req_state eq 'freeze'; | |
e4ef317d | 623 | $self->queue_resource_command($sid, $sd->{uid}, $req_state, {'target' => $sd->{target}, 'timeout' => $sd->{timeout}}); |
116dea30 DM |
624 | } |
625 | ||
626 | return $self->run_workers(); | |
c4a221bc DM |
627 | } |
628 | ||
c4a221bc | 629 | sub queue_resource_command { |
3ac1ee6b | 630 | my ($self, $sid, $uid, $state, $params) = @_; |
c4a221bc | 631 | |
35cbb764 TL |
632 | # do not queue the excatly same command twice as this may lead to |
633 | # an inconsistent HA state when the first command fails but the CRM | |
634 | # does not process its failure right away and the LRM starts a second | |
635 | # try, without the CRM knowing of it (race condition) | |
636 | # The 'stopped' command is an exception as we do not process its result | |
637 | # in the CRM and we want to execute it always (even with no active CRM) | |
638 | return if $state ne 'stopped' && $uid && defined($self->{results}->{$uid}); | |
639 | ||
c4a221bc DM |
640 | if (my $w = $self->{workers}->{$sid}) { |
641 | return if $w->{pid}; # already started | |
642 | # else, delete and overwrite queue entry with new command | |
643 | delete $self->{workers}->{$sid}; | |
644 | } | |
645 | ||
646 | $self->{workers}->{$sid} = { | |
647 | sid => $sid, | |
648 | uid => $uid, | |
649 | state => $state, | |
650 | }; | |
e88469ba | 651 | |
3ac1ee6b | 652 | $self->{workers}->{$sid}->{params} = $params if $params; |
c4a221bc DM |
653 | } |
654 | ||
655 | sub check_active_workers { | |
656 | my ($self) = @_; | |
657 | ||
658 | # finish/count workers | |
659 | my $count = 0; | |
660 | foreach my $sid (keys %{$self->{workers}}) { | |
661 | my $w = $self->{workers}->{$sid}; | |
662 | if (my $pid = $w->{pid}) { | |
663 | # check status | |
664 | my $waitpid = waitpid($pid, WNOHANG); | |
665 | if (defined($waitpid) && ($waitpid == $pid)) { | |
c0edbd7e | 666 | if (defined($w->{uid})) { |
116dea30 DM |
667 | $self->resource_command_finished($sid, $w->{uid}, $?); |
668 | } else { | |
669 | $self->stop_command_finished($sid, $?); | |
670 | } | |
c4a221bc DM |
671 | } else { |
672 | $count++; | |
673 | } | |
674 | } | |
675 | } | |
289e4784 | 676 | |
c4a221bc DM |
677 | return $count; |
678 | } | |
679 | ||
116dea30 DM |
680 | sub stop_command_finished { |
681 | my ($self, $sid, $status) = @_; | |
682 | ||
683 | my $haenv = $self->{haenv}; | |
684 | ||
685 | my $w = delete $self->{workers}->{$sid}; | |
686 | return if !$w; # should not happen | |
687 | ||
688 | my $exit_code = -1; | |
689 | ||
690 | if ($status == -1) { | |
691 | $haenv->log('err', "resource agent $sid finished - failed to execute"); | |
692 | } elsif (my $sig = ($status & 127)) { | |
693 | $haenv->log('err', "resource agent $sid finished - got signal $sig"); | |
694 | } else { | |
695 | $exit_code = ($status >> 8); | |
696 | } | |
697 | ||
698 | if ($exit_code != 0) { | |
699 | $self->{shutdown_errors}++; | |
700 | } | |
701 | } | |
702 | ||
c4a221bc DM |
703 | sub resource_command_finished { |
704 | my ($self, $sid, $uid, $status) = @_; | |
705 | ||
706 | my $haenv = $self->{haenv}; | |
707 | ||
708 | my $w = delete $self->{workers}->{$sid}; | |
709 | return if !$w; # should not happen | |
710 | ||
711 | my $exit_code = -1; | |
712 | ||
713 | if ($status == -1) { | |
289e4784 | 714 | $haenv->log('err', "resource agent $sid finished - failed to execute"); |
c4a221bc | 715 | } elsif (my $sig = ($status & 127)) { |
0f70400d | 716 | $haenv->log('err', "resource agent $sid finished - got signal $sig"); |
c4a221bc DM |
717 | } else { |
718 | $exit_code = ($status >> 8); | |
c4a221bc DM |
719 | } |
720 | ||
ea4443cc TL |
721 | $exit_code = $self->handle_service_exitcode($sid, $w->{state}, $exit_code); |
722 | ||
280ee5d5 DM |
723 | return if $exit_code == ETRY_AGAIN; # tell nobody, simply retry |
724 | ||
c4a221bc DM |
725 | $self->{results}->{$uid} = { |
726 | sid => $w->{sid}, | |
727 | state => $w->{state}, | |
728 | exit_code => $exit_code, | |
729 | }; | |
730 | ||
731 | my $ss = $self->{service_status}; | |
732 | ||
733 | # compute hash of valid/existing uids | |
734 | my $valid_uids = {}; | |
735 | foreach my $sid (keys %$ss) { | |
736 | my $sd = $ss->{$sid}; | |
737 | next if !$sd->{uid}; | |
738 | $valid_uids->{$sd->{uid}} = 1; | |
739 | } | |
740 | ||
741 | my $results = {}; | |
742 | foreach my $id (keys %{$self->{results}}) { | |
743 | next if !$valid_uids->{$id}; | |
744 | $results->{$id} = $self->{results}->{$id}; | |
745 | } | |
746 | $self->{results} = $results; | |
c4a221bc DM |
747 | } |
748 | ||
ea4443cc TL |
749 | # processes the exit code from a finished resource agent, so that the CRM knows |
750 | # if the LRM wants to retry an action based on the current recovery policies for | |
751 | # the failed service, or the CRM itself must try to recover from the failure. | |
752 | sub handle_service_exitcode { | |
753 | my ($self, $sid, $cmd, $exit_code) = @_; | |
754 | ||
755 | my $haenv = $self->{haenv}; | |
756 | my $tries = $self->{restart_tries}; | |
757 | ||
758 | my $sc = $haenv->read_service_config(); | |
aaabde6a DM |
759 | |
760 | my $max_restart = 0; | |
761 | ||
762 | if (my $cd = $sc->{$sid}) { | |
763 | $max_restart = $cd->{max_restart}; | |
764 | } | |
ea4443cc TL |
765 | |
766 | if ($cmd eq 'started') { | |
767 | ||
a89ff919 | 768 | if ($exit_code == SUCCESS) { |
ea4443cc TL |
769 | |
770 | $tries->{$sid} = 0; | |
771 | ||
772 | return $exit_code; | |
773 | ||
a89ff919 | 774 | } elsif ($exit_code == ERROR) { |
ea4443cc TL |
775 | |
776 | $tries->{$sid} = 0 if !defined($tries->{$sid}); | |
777 | ||
aaabde6a | 778 | if ($tries->{$sid} >= $max_restart) { |
ea4443cc TL |
779 | $haenv->log('err', "unable to start service $sid on local node". |
780 | " after $tries->{$sid} retries"); | |
781 | $tries->{$sid} = 0; | |
a89ff919 | 782 | return ERROR; |
ea4443cc TL |
783 | } |
784 | ||
e9e1cd68 TL |
785 | $tries->{$sid}++; |
786 | ||
787 | $haenv->log('warning', "restart policy: retry number $tries->{$sid}" . | |
788 | " for service '$sid'"); | |
a89ff919 TL |
789 | # tell CRM that we retry the start |
790 | return ETRY_AGAIN; | |
ea4443cc TL |
791 | } |
792 | } | |
793 | ||
794 | return $exit_code; | |
795 | ||
796 | } | |
797 | ||
2a045f55 | 798 | sub exec_resource_agent { |
3ac1ee6b | 799 | my ($self, $sid, $service_config, $cmd, $params) = @_; |
2a045f55 TL |
800 | |
801 | # setup execution environment | |
802 | ||
803 | $ENV{'PATH'} = '/sbin:/bin:/usr/sbin:/usr/bin'; | |
804 | ||
2a045f55 TL |
805 | my $haenv = $self->{haenv}; |
806 | ||
807 | my $nodename = $haenv->nodename(); | |
808 | ||
0087839a | 809 | my (undef, $service_type, $service_name) = $haenv->parse_sid($sid); |
2a045f55 TL |
810 | |
811 | my $plugin = PVE::HA::Resources->lookup($service_type); | |
812 | if (!$plugin) { | |
813 | $haenv->log('err', "service type '$service_type' not implemented"); | |
814 | return EUNKNOWN_SERVICE_TYPE; | |
815 | } | |
816 | ||
aaabde6a DM |
817 | if (!$service_config) { |
818 | $haenv->log('err', "missing resource configuration for '$sid'"); | |
819 | return EUNKNOWN_SERVICE; | |
820 | } | |
821 | ||
d338a56f TL |
822 | # process error state early |
823 | if ($cmd eq 'error') { | |
824 | ||
825 | $haenv->log('err', "service $sid is in an error state and needs manual " . | |
826 | "intervention. Look up 'ERROR RECOVERY' in the documentation."); | |
827 | ||
828 | return SUCCESS; # error always succeeds | |
829 | } | |
830 | ||
2a045f55 TL |
831 | if ($service_config->{node} ne $nodename) { |
832 | $haenv->log('err', "service '$sid' not on this node"); | |
833 | return EWRONG_NODE; | |
834 | } | |
835 | ||
836 | my $id = $service_name; | |
837 | ||
838 | my $running = $plugin->check_running($haenv, $id); | |
839 | ||
840 | if ($cmd eq 'started') { | |
841 | ||
842 | return SUCCESS if $running; | |
843 | ||
844 | $haenv->log("info", "starting service $sid"); | |
845 | ||
846 | $plugin->start($haenv, $id); | |
847 | ||
848 | $running = $plugin->check_running($haenv, $id); | |
849 | ||
850 | if ($running) { | |
851 | $haenv->log("info", "service status $sid started"); | |
852 | return SUCCESS; | |
853 | } else { | |
854 | $haenv->log("warning", "unable to start service $sid"); | |
855 | return ERROR; | |
856 | } | |
857 | ||
858 | } elsif ($cmd eq 'request_stop' || $cmd eq 'stopped') { | |
859 | ||
860 | return SUCCESS if !$running; | |
861 | ||
e4ef317d FE |
862 | if (defined($params->{timeout})) { |
863 | $haenv->log("info", "stopping service $sid (timeout=$params->{timeout})"); | |
864 | } else { | |
865 | $haenv->log("info", "stopping service $sid"); | |
866 | } | |
2a045f55 | 867 | |
e4ef317d | 868 | $plugin->shutdown($haenv, $id, $params->{timeout}); |
2a045f55 TL |
869 | |
870 | $running = $plugin->check_running($haenv, $id); | |
871 | ||
872 | if (!$running) { | |
873 | $haenv->log("info", "service status $sid stopped"); | |
874 | return SUCCESS; | |
875 | } else { | |
876 | $haenv->log("info", "unable to stop stop service $sid (still running)"); | |
877 | return ERROR; | |
878 | } | |
879 | ||
880 | } elsif ($cmd eq 'migrate' || $cmd eq 'relocate') { | |
881 | ||
3ac1ee6b | 882 | my $target = $params->{target}; |
2a045f55 TL |
883 | if (!defined($target)) { |
884 | die "$cmd '$sid' failed - missing target\n" if !defined($target); | |
885 | return EINVALID_PARAMETER; | |
886 | } | |
887 | ||
888 | if ($service_config->{node} eq $target) { | |
889 | # already there | |
890 | return SUCCESS; | |
891 | } | |
892 | ||
893 | my $online = ($cmd eq 'migrate') ? 1 : 0; | |
894 | ||
ea28f873 | 895 | my $res = $plugin->migrate($haenv, $id, $target, $online); |
2a045f55 TL |
896 | |
897 | # something went wrong if service is still on this node | |
ea28f873 | 898 | if (!$res) { |
2a045f55 TL |
899 | $haenv->log("err", "service $sid not moved (migration error)"); |
900 | return ERROR; | |
901 | } | |
902 | ||
903 | return SUCCESS; | |
904 | ||
2a045f55 TL |
905 | } |
906 | ||
907 | $haenv->log("err", "implement me (cmd '$cmd')"); | |
908 | return EUNKNOWN_COMMAND; | |
909 | } | |
910 | ||
911 | ||
5f095798 | 912 | 1; |