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Commit | Line | Data |
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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 | 23 | # we sleep ~10s per 'active' round, so if no services is available for >= 10 min we'd go in wait |
4ee32601 | 24 | # state giving up the watchdog and the LRM lock voluntary, ensuring the WD can do no harm |
21051707 TL |
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 = $@) { |
a31c6fe5 | 126 | $haenv->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 | 244 | my $haenv = $self->{haenv}; |
546e2f1f DM |
245 | my $nodename = $haenv->nodename(); |
246 | ||
247 | my $ss = $self->{service_status}; | |
248 | ||
249 | my $count = 0; | |
546e2f1f DM |
250 | foreach my $sid (keys %$ss) { |
251 | my $sd = $ss->{$sid}; | |
252 | next if !$sd->{node}; | |
253 | next if $sd->{node} ne $nodename; | |
254 | my $req_state = $sd->{state}; | |
255 | next if !defined($req_state); | |
256 | next if $req_state eq 'stopped'; | |
d54c04bd | 257 | # NOTE: 'ignored' ones are already dropped by the manager from service_status |
9c7d068b | 258 | next if $req_state eq 'freeze'; |
38545741 TL |
259 | # erroneous services are not managed by HA, don't count them as active |
260 | next if $req_state eq 'error'; | |
546e2f1f DM |
261 | |
262 | $count++; | |
263 | } | |
289e4784 | 264 | |
546e2f1f DM |
265 | return $count; |
266 | } | |
5bd7aa54 DM |
267 | |
268 | my $wrote_lrm_status_at_startup = 0; | |
269 | ||
5f095798 DM |
270 | sub do_one_iteration { |
271 | my ($self) = @_; | |
272 | ||
273 | my $haenv = $self->{haenv}; | |
274 | ||
da6f0416 TL |
275 | $haenv->loop_start_hook(); |
276 | ||
3df15380 TL |
277 | $self->{cluster_state_update} = $haenv->cluster_state_update(); |
278 | ||
da6f0416 TL |
279 | my $res = $self->work(); |
280 | ||
281 | $haenv->loop_end_hook(); | |
282 | ||
283 | return $res; | |
284 | } | |
285 | ||
abc1499b TL |
286 | # NOTE: this is disabling the self-fence mechanism, so it must NOT be called with active services |
287 | # It's normally *only* OK on graceful shutdown (with no services, or all services frozen) | |
288 | my sub give_up_watchdog_protection { | |
289 | my ($self) = @_; | |
290 | ||
291 | if ($self->{ha_agent_wd}) { | |
292 | $self->{haenv}->watchdog_close($self->{ha_agent_wd}); | |
293 | delete $self->{ha_agent_wd}; # only delete after close! | |
294 | } | |
295 | } | |
296 | ||
da6f0416 TL |
297 | sub work { |
298 | my ($self) = @_; | |
299 | ||
300 | my $haenv = $self->{haenv}; | |
301 | ||
c5ec095f | 302 | if (!$wrote_lrm_status_at_startup) { |
79829202 | 303 | if ($self->update_lrm_status()) { |
c5ec095f DM |
304 | $wrote_lrm_status_at_startup = 1; |
305 | } else { | |
306 | # do nothing | |
307 | $haenv->sleep(5); | |
308 | return $self->{shutdown_request} ? 0 : 1; | |
309 | } | |
5bd7aa54 | 310 | } |
289e4784 | 311 | |
5f095798 DM |
312 | my $status = $self->get_local_status(); |
313 | my $state = $status->{state}; | |
314 | ||
8e940b68 | 315 | $self->update_service_status(); |
067cdf33 | 316 | |
49777d09 | 317 | my $fence_request = PVE::HA::Tools::count_fenced_services($self->{service_status}, $haenv->nodename()); |
289e4784 TL |
318 | |
319 | # do state changes first | |
5f095798 DM |
320 | |
321 | my $ctime = $haenv->get_time(); | |
322 | ||
b0bf08a9 | 323 | if ($state eq 'wait_for_agent_lock') { |
5f095798 | 324 | |
546e2f1f | 325 | my $service_count = $self->active_service_count(); |
5f095798 | 326 | |
067cdf33 | 327 | if (!$fence_request && $service_count && $haenv->quorate()) { |
0bba8f60 DM |
328 | if ($self->get_protected_ha_agent_lock()) { |
329 | $self->set_local_status({ state => 'active' }); | |
5f095798 DM |
330 | } |
331 | } | |
289e4784 | 332 | |
5f095798 DM |
333 | } elsif ($state eq 'lost_agent_lock') { |
334 | ||
067cdf33 | 335 | if (!$fence_request && $haenv->quorate()) { |
0bba8f60 DM |
336 | if ($self->get_protected_ha_agent_lock()) { |
337 | $self->set_local_status({ state => 'active' }); | |
5f095798 DM |
338 | } |
339 | } | |
340 | ||
0bba8f60 | 341 | } elsif ($state eq 'active') { |
5f095798 | 342 | |
289e4784 | 343 | if ($fence_request) { |
067cdf33 | 344 | $haenv->log('err', "node need to be fenced - releasing agent_lock\n"); |
289e4784 | 345 | $self->set_local_status({ state => 'lost_agent_lock'}); |
067cdf33 | 346 | } elsif (!$self->get_protected_ha_agent_lock()) { |
5f095798 | 347 | $self->set_local_status({ state => 'lost_agent_lock'}); |
99278e06 TL |
348 | } elsif ($self->{mode} eq 'maintenance') { |
349 | $self->set_local_status({ state => 'maintenance'}); | |
21051707 TL |
350 | } else { |
351 | if (!$self->has_configured_service_on_local_node() && !$self->run_workers()) { | |
352 | # no active service configured for this node and all (old) workers are done | |
353 | $self->{active_idle_rounds}++; | |
354 | if ($self->{active_idle_rounds} > $max_active_idle_rounds) { | |
355 | $haenv->log('info', "node had no service configured for $max_active_idle_rounds rounds, going idle.\n"); | |
356 | # safety: no active service & no running worker for quite some time -> OK | |
357 | $haenv->release_ha_agent_lock(); | |
358 | give_up_watchdog_protection($self); | |
359 | $self->set_local_status({ state => 'wait_for_agent_lock'}); | |
360 | $self->{active_idle_rounds} = 0; | |
361 | } | |
362 | } elsif ($self->{active_idle_rounds}) { | |
363 | $self->{active_idle_rounds} = 0; | |
364 | } | |
99278e06 TL |
365 | } |
366 | } elsif ($state eq 'maintenance') { | |
367 | ||
368 | if ($fence_request) { | |
369 | $haenv->log('err', "node need to be fenced during maintenance mode - releasing agent_lock\n"); | |
370 | $self->set_local_status({ state => 'lost_agent_lock'}); | |
371 | } elsif (!$self->get_protected_ha_agent_lock()) { | |
372 | $self->set_local_status({ state => 'lost_agent_lock'}); | |
5f095798 DM |
373 | } |
374 | } | |
375 | ||
376 | $status = $self->get_local_status(); | |
377 | $state = $status->{state}; | |
378 | ||
379 | # do work | |
380 | ||
381 | if ($state eq 'wait_for_agent_lock') { | |
382 | ||
383 | return 0 if $self->{shutdown_request}; | |
289e4784 | 384 | |
79829202 | 385 | $self->update_lrm_status(); |
289e4784 | 386 | |
5f095798 | 387 | $haenv->sleep(5); |
289e4784 | 388 | |
0bba8f60 | 389 | } elsif ($state eq 'active') { |
5f095798 DM |
390 | |
391 | my $startime = $haenv->get_time(); | |
392 | ||
393 | my $max_time = 10; | |
394 | ||
395 | my $shutdown = 0; | |
396 | ||
397 | # do work (max_time seconds) | |
398 | eval { | |
399 | # fixme: set alert timer | |
400 | ||
8e940b68 TL |
401 | # if we could not get the current service status there's no point |
402 | # in doing anything, try again next round. | |
403 | return if !$self->update_service_status(); | |
404 | ||
5f095798 DM |
405 | if ($self->{shutdown_request}) { |
406 | ||
499f06e3 | 407 | if ($self->{mode} eq 'restart') { |
5f095798 | 408 | |
499f06e3 | 409 | my $service_count = $self->active_service_count(); |
5f095798 | 410 | |
499f06e3 | 411 | if ($service_count == 0) { |
116dea30 | 412 | if ($self->run_workers() == 0) { |
abc1499b TL |
413 | # safety: no active services or workers -> OK |
414 | give_up_watchdog_protection($self); | |
116dea30 | 415 | $shutdown = 1; |
e23f674c TL |
416 | |
417 | # restart with no or freezed services, release the lock | |
418 | $haenv->release_ha_agent_lock(); | |
116dea30 DM |
419 | } |
420 | } | |
421 | } else { | |
422 | ||
423 | if ($self->run_workers() == 0) { | |
424 | if ($self->{shutdown_errors} == 0) { | |
abc1499b TL |
425 | # safety: no active services and LRM shutdown -> OK |
426 | give_up_watchdog_protection($self); | |
0e5b1a43 TL |
427 | |
428 | # shutdown with all services stopped thus release the lock | |
429 | $haenv->release_ha_agent_lock(); | |
499f06e3 | 430 | } |
5f095798 | 431 | |
499f06e3 DM |
432 | $shutdown = 1; |
433 | } | |
5f095798 | 434 | } |
c4a221bc | 435 | } else { |
724bd3f3 TL |
436 | if (!$self->{cluster_state_update}) { |
437 | # update failed but we could still renew our lock (cfs restart?), | |
438 | # safely skip manage and expect to update just fine next round | |
439 | $haenv->log('notice', "temporary inconsistent cluster state " . | |
440 | "(cfs restart?), skip round"); | |
441 | return; | |
442 | } | |
c4a221bc DM |
443 | |
444 | $self->manage_resources(); | |
067cdf33 | 445 | |
5f095798 DM |
446 | } |
447 | }; | |
448 | if (my $err = $@) { | |
449 | $haenv->log('err', "got unexpected error - $err"); | |
450 | } | |
451 | ||
79829202 | 452 | $self->update_lrm_status(); |
289e4784 | 453 | |
5f095798 DM |
454 | return 0 if $shutdown; |
455 | ||
456 | $haenv->sleep_until($startime + $max_time); | |
457 | ||
458 | } elsif ($state eq 'lost_agent_lock') { | |
289e4784 | 459 | |
abc1499b | 460 | # NOTE: watchdog is active an will trigger soon! |
5f095798 | 461 | # so we hope to get the lock back soon! |
5f095798 DM |
462 | if ($self->{shutdown_request}) { |
463 | ||
546e2f1f | 464 | my $service_count = $self->active_service_count(); |
5f095798 | 465 | |
546e2f1f | 466 | if ($service_count > 0) { |
289e4784 | 467 | $haenv->log('err', "get shutdown request in state 'lost_agent_lock' - " . |
546e2f1f | 468 | "detected $service_count running services"); |
5f095798 | 469 | |
c5c7faf6 TL |
470 | if ($self->{mode} eq 'restart') { |
471 | my $state_mt = $self->{status}->{state_change_time}; | |
472 | ||
473 | # watchdog should have already triggered, so either it's set | |
474 | # set to noboot or it failed. As we are in restart mode, and | |
475 | # have infinity stoptimeout -> exit now - we don't touch services | |
476 | # or change state, so this is save, relatively speaking | |
477 | if (($haenv->get_time() - $state_mt) > 90) { | |
478 | $haenv->log('err', "lost agent lock and restart request for over 90 seconds - giving up!"); | |
479 | return 0; | |
480 | } | |
481 | } | |
546e2f1f | 482 | } else { |
abc1499b TL |
483 | # safety: all services are stopped, so we can close the watchdog |
484 | give_up_watchdog_protection($self); | |
289e4784 | 485 | |
546e2f1f | 486 | return 0; |
5f095798 | 487 | } |
5f095798 DM |
488 | } |
489 | ||
b0bf08a9 DM |
490 | $haenv->sleep(5); |
491 | ||
99278e06 TL |
492 | } elsif ($state eq 'maintenance') { |
493 | ||
494 | my $startime = $haenv->get_time(); | |
495 | return if !$self->update_service_status(); | |
496 | ||
497 | # wait until all active services moved away | |
498 | my $service_count = $self->active_service_count(); | |
499 | ||
500 | my $exit_lrm = 0; | |
501 | ||
502 | if ($self->{shutdown_request}) { | |
503 | if ($service_count == 0 && $self->run_workers() == 0) { | |
abc1499b TL |
504 | # safety: going into maintenance and all active services got moved -> OK |
505 | give_up_watchdog_protection($self); | |
99278e06 TL |
506 | |
507 | $exit_lrm = 1; | |
508 | ||
509 | # restart with no or freezed services, release the lock | |
510 | $haenv->release_ha_agent_lock(); | |
511 | } | |
512 | } | |
513 | ||
514 | $self->manage_resources() if !$exit_lrm; | |
515 | ||
516 | $self->update_lrm_status(); | |
517 | ||
518 | return 0 if $exit_lrm; | |
519 | ||
520 | $haenv->sleep_until($startime + 5); | |
521 | ||
5f095798 DM |
522 | } else { |
523 | ||
524 | die "got unexpected status '$state'\n"; | |
525 | ||
526 | } | |
527 | ||
528 | return 1; | |
529 | } | |
530 | ||
116dea30 | 531 | sub run_workers { |
c4a221bc DM |
532 | my ($self) = @_; |
533 | ||
534 | my $haenv = $self->{haenv}; | |
535 | ||
f31b7e94 | 536 | my $starttime = $haenv->get_time(); |
c4a221bc | 537 | |
a28fa330 TL |
538 | # number of workers to start, if 0 we exec the command directly witouth forking |
539 | my $max_workers = $haenv->get_max_workers(); | |
c4a221bc | 540 | |
6dbf93a0 | 541 | my $sc = $haenv->read_service_config(); |
f31b7e94 DM |
542 | |
543 | while (($haenv->get_time() - $starttime) < 5) { | |
c4a221bc DM |
544 | my $count = $self->check_active_workers(); |
545 | ||
a5e4bef4 | 546 | foreach my $sid (sort keys %{$self->{workers}}) { |
a28fa330 TL |
547 | last if $count >= $max_workers && $max_workers > 0; |
548 | ||
c4a221bc DM |
549 | my $w = $self->{workers}->{$sid}; |
550 | if (!$w->{pid}) { | |
a28fa330 TL |
551 | # only fork if we may else call exec_resource_agent |
552 | # directly (e.g. for regression tests) | |
553 | if ($max_workers > 0) { | |
f31b7e94 DM |
554 | my $pid = fork(); |
555 | if (!defined($pid)) { | |
556 | $haenv->log('err', "fork worker failed"); | |
557 | $count = 0; last; # abort, try later | |
558 | } elsif ($pid == 0) { | |
a2aae08a TL |
559 | $haenv->after_fork(); # cleanup |
560 | ||
f31b7e94 DM |
561 | # do work |
562 | my $res = -1; | |
563 | eval { | |
3ac1ee6b | 564 | $res = $self->exec_resource_agent($sid, $sc->{$sid}, $w->{state}, $w->{params}); |
f31b7e94 DM |
565 | }; |
566 | if (my $err = $@) { | |
567 | $haenv->log('err', $err); | |
568 | POSIX::_exit(-1); | |
289e4784 TL |
569 | } |
570 | POSIX::_exit($res); | |
f31b7e94 DM |
571 | } else { |
572 | $count++; | |
573 | $w->{pid} = $pid; | |
574 | } | |
575 | } else { | |
c4a221bc DM |
576 | my $res = -1; |
577 | eval { | |
3ac1ee6b | 578 | $res = $self->exec_resource_agent($sid, $sc->{$sid}, $w->{state}, $w->{params}); |
b33b5743 | 579 | $res = $res << 8 if $res > 0; |
c4a221bc DM |
580 | }; |
581 | if (my $err = $@) { | |
f31b7e94 | 582 | $haenv->log('err', $err); |
116dea30 DM |
583 | } |
584 | if (defined($w->{uid})) { | |
585 | $self->resource_command_finished($sid, $w->{uid}, $res); | |
586 | } else { | |
587 | $self->stop_command_finished($sid, $res); | |
588 | } | |
c4a221bc DM |
589 | } |
590 | } | |
591 | } | |
592 | ||
593 | last if !$count; | |
594 | ||
f31b7e94 | 595 | $haenv->sleep(1); |
c4a221bc | 596 | } |
116dea30 DM |
597 | |
598 | return scalar(keys %{$self->{workers}}); | |
599 | } | |
600 | ||
601 | sub manage_resources { | |
602 | my ($self) = @_; | |
603 | ||
604 | my $haenv = $self->{haenv}; | |
605 | ||
606 | my $nodename = $haenv->nodename(); | |
607 | ||
608 | my $ss = $self->{service_status}; | |
609 | ||
5a28da91 TL |
610 | foreach my $sid (keys %{$self->{restart_tries}}) { |
611 | delete $self->{restart_tries}->{$sid} if !$ss->{$sid}; | |
612 | } | |
613 | ||
116dea30 DM |
614 | foreach my $sid (keys %$ss) { |
615 | my $sd = $ss->{$sid}; | |
616 | next if !$sd->{node}; | |
617 | next if !$sd->{uid}; | |
618 | next if $sd->{node} ne $nodename; | |
619 | my $req_state = $sd->{state}; | |
620 | next if !defined($req_state); | |
90a24755 TL |
621 | # can only happen for restricted groups where the failed node itself needs to be the |
622 | # reocvery target. Always let the master first do so, it will then marked as 'stopped' and | |
623 | # we can just continue normally. But we must NOT do anything with it while still in recovery | |
624 | next if $req_state eq 'recovery'; | |
116dea30 | 625 | next if $req_state eq 'freeze'; |
90a24755 TL |
626 | |
627 | $self->queue_resource_command($sid, $sd->{uid}, $req_state, { | |
628 | 'target' => $sd->{target}, | |
629 | 'timeout' => $sd->{timeout}, | |
630 | }); | |
116dea30 DM |
631 | } |
632 | ||
633 | return $self->run_workers(); | |
c4a221bc DM |
634 | } |
635 | ||
c4a221bc | 636 | sub queue_resource_command { |
3ac1ee6b | 637 | my ($self, $sid, $uid, $state, $params) = @_; |
c4a221bc | 638 | |
35cbb764 TL |
639 | # do not queue the excatly same command twice as this may lead to |
640 | # an inconsistent HA state when the first command fails but the CRM | |
641 | # does not process its failure right away and the LRM starts a second | |
642 | # try, without the CRM knowing of it (race condition) | |
643 | # The 'stopped' command is an exception as we do not process its result | |
644 | # in the CRM and we want to execute it always (even with no active CRM) | |
645 | return if $state ne 'stopped' && $uid && defined($self->{results}->{$uid}); | |
646 | ||
c4a221bc DM |
647 | if (my $w = $self->{workers}->{$sid}) { |
648 | return if $w->{pid}; # already started | |
649 | # else, delete and overwrite queue entry with new command | |
650 | delete $self->{workers}->{$sid}; | |
651 | } | |
652 | ||
653 | $self->{workers}->{$sid} = { | |
654 | sid => $sid, | |
655 | uid => $uid, | |
656 | state => $state, | |
657 | }; | |
e88469ba | 658 | |
3ac1ee6b | 659 | $self->{workers}->{$sid}->{params} = $params if $params; |
c4a221bc DM |
660 | } |
661 | ||
662 | sub check_active_workers { | |
663 | my ($self) = @_; | |
664 | ||
665 | # finish/count workers | |
666 | my $count = 0; | |
667 | foreach my $sid (keys %{$self->{workers}}) { | |
668 | my $w = $self->{workers}->{$sid}; | |
669 | if (my $pid = $w->{pid}) { | |
670 | # check status | |
671 | my $waitpid = waitpid($pid, WNOHANG); | |
672 | if (defined($waitpid) && ($waitpid == $pid)) { | |
c0edbd7e | 673 | if (defined($w->{uid})) { |
116dea30 DM |
674 | $self->resource_command_finished($sid, $w->{uid}, $?); |
675 | } else { | |
676 | $self->stop_command_finished($sid, $?); | |
677 | } | |
c4a221bc DM |
678 | } else { |
679 | $count++; | |
680 | } | |
681 | } | |
682 | } | |
289e4784 | 683 | |
c4a221bc DM |
684 | return $count; |
685 | } | |
686 | ||
116dea30 DM |
687 | sub stop_command_finished { |
688 | my ($self, $sid, $status) = @_; | |
689 | ||
690 | my $haenv = $self->{haenv}; | |
691 | ||
692 | my $w = delete $self->{workers}->{$sid}; | |
693 | return if !$w; # should not happen | |
694 | ||
695 | my $exit_code = -1; | |
696 | ||
697 | if ($status == -1) { | |
698 | $haenv->log('err', "resource agent $sid finished - failed to execute"); | |
699 | } elsif (my $sig = ($status & 127)) { | |
700 | $haenv->log('err', "resource agent $sid finished - got signal $sig"); | |
701 | } else { | |
702 | $exit_code = ($status >> 8); | |
703 | } | |
704 | ||
705 | if ($exit_code != 0) { | |
706 | $self->{shutdown_errors}++; | |
707 | } | |
708 | } | |
709 | ||
c4a221bc DM |
710 | sub resource_command_finished { |
711 | my ($self, $sid, $uid, $status) = @_; | |
712 | ||
713 | my $haenv = $self->{haenv}; | |
714 | ||
715 | my $w = delete $self->{workers}->{$sid}; | |
716 | return if !$w; # should not happen | |
717 | ||
718 | my $exit_code = -1; | |
719 | ||
720 | if ($status == -1) { | |
289e4784 | 721 | $haenv->log('err', "resource agent $sid finished - failed to execute"); |
c4a221bc | 722 | } elsif (my $sig = ($status & 127)) { |
0f70400d | 723 | $haenv->log('err', "resource agent $sid finished - got signal $sig"); |
c4a221bc DM |
724 | } else { |
725 | $exit_code = ($status >> 8); | |
c4a221bc DM |
726 | } |
727 | ||
ea4443cc TL |
728 | $exit_code = $self->handle_service_exitcode($sid, $w->{state}, $exit_code); |
729 | ||
280ee5d5 DM |
730 | return if $exit_code == ETRY_AGAIN; # tell nobody, simply retry |
731 | ||
c4a221bc DM |
732 | $self->{results}->{$uid} = { |
733 | sid => $w->{sid}, | |
734 | state => $w->{state}, | |
735 | exit_code => $exit_code, | |
736 | }; | |
737 | ||
738 | my $ss = $self->{service_status}; | |
739 | ||
740 | # compute hash of valid/existing uids | |
741 | my $valid_uids = {}; | |
742 | foreach my $sid (keys %$ss) { | |
743 | my $sd = $ss->{$sid}; | |
744 | next if !$sd->{uid}; | |
745 | $valid_uids->{$sd->{uid}} = 1; | |
746 | } | |
747 | ||
748 | my $results = {}; | |
749 | foreach my $id (keys %{$self->{results}}) { | |
750 | next if !$valid_uids->{$id}; | |
751 | $results->{$id} = $self->{results}->{$id}; | |
752 | } | |
753 | $self->{results} = $results; | |
c4a221bc DM |
754 | } |
755 | ||
ea4443cc TL |
756 | # processes the exit code from a finished resource agent, so that the CRM knows |
757 | # if the LRM wants to retry an action based on the current recovery policies for | |
758 | # the failed service, or the CRM itself must try to recover from the failure. | |
759 | sub handle_service_exitcode { | |
760 | my ($self, $sid, $cmd, $exit_code) = @_; | |
761 | ||
762 | my $haenv = $self->{haenv}; | |
763 | my $tries = $self->{restart_tries}; | |
764 | ||
765 | my $sc = $haenv->read_service_config(); | |
aaabde6a DM |
766 | |
767 | my $max_restart = 0; | |
768 | ||
769 | if (my $cd = $sc->{$sid}) { | |
770 | $max_restart = $cd->{max_restart}; | |
771 | } | |
ea4443cc TL |
772 | |
773 | if ($cmd eq 'started') { | |
774 | ||
a89ff919 | 775 | if ($exit_code == SUCCESS) { |
ea4443cc TL |
776 | |
777 | $tries->{$sid} = 0; | |
778 | ||
779 | return $exit_code; | |
780 | ||
a89ff919 | 781 | } elsif ($exit_code == ERROR) { |
ea4443cc TL |
782 | |
783 | $tries->{$sid} = 0 if !defined($tries->{$sid}); | |
784 | ||
aaabde6a | 785 | if ($tries->{$sid} >= $max_restart) { |
ea4443cc TL |
786 | $haenv->log('err', "unable to start service $sid on local node". |
787 | " after $tries->{$sid} retries"); | |
788 | $tries->{$sid} = 0; | |
a89ff919 | 789 | return ERROR; |
ea4443cc TL |
790 | } |
791 | ||
e9e1cd68 TL |
792 | $tries->{$sid}++; |
793 | ||
794 | $haenv->log('warning', "restart policy: retry number $tries->{$sid}" . | |
795 | " for service '$sid'"); | |
a89ff919 TL |
796 | # tell CRM that we retry the start |
797 | return ETRY_AGAIN; | |
ea4443cc TL |
798 | } |
799 | } | |
800 | ||
801 | return $exit_code; | |
802 | ||
803 | } | |
804 | ||
2a045f55 | 805 | sub exec_resource_agent { |
3ac1ee6b | 806 | my ($self, $sid, $service_config, $cmd, $params) = @_; |
2a045f55 TL |
807 | |
808 | # setup execution environment | |
809 | ||
810 | $ENV{'PATH'} = '/sbin:/bin:/usr/sbin:/usr/bin'; | |
811 | ||
2a045f55 TL |
812 | my $haenv = $self->{haenv}; |
813 | ||
814 | my $nodename = $haenv->nodename(); | |
815 | ||
0087839a | 816 | my (undef, $service_type, $service_name) = $haenv->parse_sid($sid); |
2a045f55 TL |
817 | |
818 | my $plugin = PVE::HA::Resources->lookup($service_type); | |
819 | if (!$plugin) { | |
820 | $haenv->log('err', "service type '$service_type' not implemented"); | |
821 | return EUNKNOWN_SERVICE_TYPE; | |
822 | } | |
823 | ||
aaabde6a DM |
824 | if (!$service_config) { |
825 | $haenv->log('err', "missing resource configuration for '$sid'"); | |
826 | return EUNKNOWN_SERVICE; | |
827 | } | |
828 | ||
d338a56f TL |
829 | # process error state early |
830 | if ($cmd eq 'error') { | |
d338a56f TL |
831 | $haenv->log('err', "service $sid is in an error state and needs manual " . |
832 | "intervention. Look up 'ERROR RECOVERY' in the documentation."); | |
833 | ||
834 | return SUCCESS; # error always succeeds | |
835 | } | |
836 | ||
2a045f55 TL |
837 | if ($service_config->{node} ne $nodename) { |
838 | $haenv->log('err', "service '$sid' not on this node"); | |
839 | return EWRONG_NODE; | |
840 | } | |
841 | ||
842 | my $id = $service_name; | |
843 | ||
844 | my $running = $plugin->check_running($haenv, $id); | |
845 | ||
846 | if ($cmd eq 'started') { | |
847 | ||
848 | return SUCCESS if $running; | |
849 | ||
850 | $haenv->log("info", "starting service $sid"); | |
851 | ||
852 | $plugin->start($haenv, $id); | |
853 | ||
854 | $running = $plugin->check_running($haenv, $id); | |
855 | ||
856 | if ($running) { | |
857 | $haenv->log("info", "service status $sid started"); | |
858 | return SUCCESS; | |
859 | } else { | |
860 | $haenv->log("warning", "unable to start service $sid"); | |
861 | return ERROR; | |
862 | } | |
863 | ||
864 | } elsif ($cmd eq 'request_stop' || $cmd eq 'stopped') { | |
865 | ||
866 | return SUCCESS if !$running; | |
867 | ||
e4ef317d FE |
868 | if (defined($params->{timeout})) { |
869 | $haenv->log("info", "stopping service $sid (timeout=$params->{timeout})"); | |
870 | } else { | |
871 | $haenv->log("info", "stopping service $sid"); | |
872 | } | |
2a045f55 | 873 | |
e4ef317d | 874 | $plugin->shutdown($haenv, $id, $params->{timeout}); |
2a045f55 TL |
875 | |
876 | $running = $plugin->check_running($haenv, $id); | |
877 | ||
878 | if (!$running) { | |
879 | $haenv->log("info", "service status $sid stopped"); | |
880 | return SUCCESS; | |
881 | } else { | |
882 | $haenv->log("info", "unable to stop stop service $sid (still running)"); | |
883 | return ERROR; | |
884 | } | |
885 | ||
886 | } elsif ($cmd eq 'migrate' || $cmd eq 'relocate') { | |
887 | ||
3ac1ee6b | 888 | my $target = $params->{target}; |
2a045f55 TL |
889 | if (!defined($target)) { |
890 | die "$cmd '$sid' failed - missing target\n" if !defined($target); | |
891 | return EINVALID_PARAMETER; | |
892 | } | |
893 | ||
894 | if ($service_config->{node} eq $target) { | |
895 | # already there | |
896 | return SUCCESS; | |
897 | } | |
898 | ||
899 | my $online = ($cmd eq 'migrate') ? 1 : 0; | |
900 | ||
ea28f873 | 901 | my $res = $plugin->migrate($haenv, $id, $target, $online); |
2a045f55 TL |
902 | |
903 | # something went wrong if service is still on this node | |
ea28f873 | 904 | if (!$res) { |
2a045f55 TL |
905 | $haenv->log("err", "service $sid not moved (migration error)"); |
906 | return ERROR; | |
907 | } | |
908 | ||
909 | return SUCCESS; | |
910 | ||
2a045f55 TL |
911 | } |
912 | ||
913 | $haenv->log("err", "implement me (cmd '$cmd')"); | |
914 | return EUNKNOWN_COMMAND; | |
915 | } | |
916 | ||
917 | ||
5f095798 | 918 | 1; |