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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 | |
7c142d68 FE |
62 | my $dc_cfg = $haenv->get_datacenter_settings(); |
63 | my $shutdown_policy = $dc_cfg->{ha}->{shutdown_policy} // 'conditional'; | |
ba15a9b9 | 64 | |
7a20d688 TL |
65 | if ($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} || {}; | |
30fc7cee TL |
189 | my $nodename = $haenv->nodename(); |
190 | $self->{node_status} = $ms->{node_status}->{$nodename} || 'unknown'; | |
8e940b68 TL |
191 | return 1; |
192 | } | |
193 | } | |
194 | ||
5f095798 DM |
195 | sub get_protected_ha_agent_lock { |
196 | my ($self) = @_; | |
197 | ||
198 | my $haenv = $self->{haenv}; | |
199 | ||
200 | my $count = 0; | |
201 | my $starttime = $haenv->get_time(); | |
202 | ||
203 | for (;;) { | |
289e4784 | 204 | |
5f095798 DM |
205 | if ($haenv->get_ha_agent_lock()) { |
206 | if ($self->{ha_agent_wd}) { | |
207 | $haenv->watchdog_update($self->{ha_agent_wd}); | |
208 | } else { | |
209 | my $wfh = $haenv->watchdog_open(); | |
210 | $self->{ha_agent_wd} = $wfh; | |
211 | } | |
212 | return 1; | |
213 | } | |
289e4784 | 214 | |
5f095798 DM |
215 | last if ++$count > 5; # try max 5 time |
216 | ||
217 | my $delay = $haenv->get_time() - $starttime; | |
218 | last if $delay > 5; # for max 5 seconds | |
219 | ||
220 | $haenv->sleep(1); | |
221 | } | |
289e4784 | 222 | |
5f095798 DM |
223 | return 0; |
224 | } | |
225 | ||
21051707 TL |
226 | # only cares if any service has the local node as their node, independent of which req.state it is |
227 | sub has_configured_service_on_local_node { | |
228 | my ($self) = @_; | |
229 | ||
230 | my $haenv = $self->{haenv}; | |
231 | my $nodename = $haenv->nodename(); | |
232 | ||
233 | my $ss = $self->{service_status}; | |
234 | foreach my $sid (keys %$ss) { | |
235 | my $sd = $ss->{$sid}; | |
236 | next if !$sd->{node} || $sd->{node} ne $nodename; | |
237 | ||
238 | return 1; | |
239 | } | |
240 | return 0; | |
241 | } | |
242 | ||
303490d8 TL |
243 | sub is_fence_requested { |
244 | my ($self) = @_; | |
245 | ||
246 | my $haenv = $self->{haenv}; | |
30fc7cee | 247 | |
303490d8 TL |
248 | my $nodename = $haenv->nodename(); |
249 | my $ss = $self->{service_status}; | |
250 | ||
251 | my $fenced_services = PVE::HA::Tools::count_fenced_services($ss, $nodename); | |
252 | ||
30fc7cee | 253 | return $fenced_services || $self->{node_status} eq 'fence'; |
303490d8 TL |
254 | } |
255 | ||
73faade5 TL |
256 | sub is_maintenance_requested { |
257 | my ($self) = @_; | |
258 | ||
259 | # shutdown maintenance or manual request | |
260 | return $self->{mode} eq 'maintenance'; | |
261 | } | |
262 | ||
546e2f1f DM |
263 | sub active_service_count { |
264 | my ($self) = @_; | |
289e4784 | 265 | |
546e2f1f | 266 | my $haenv = $self->{haenv}; |
546e2f1f DM |
267 | my $nodename = $haenv->nodename(); |
268 | ||
269 | my $ss = $self->{service_status}; | |
270 | ||
271 | my $count = 0; | |
546e2f1f DM |
272 | foreach my $sid (keys %$ss) { |
273 | my $sd = $ss->{$sid}; | |
274 | next if !$sd->{node}; | |
275 | next if $sd->{node} ne $nodename; | |
276 | my $req_state = $sd->{state}; | |
277 | next if !defined($req_state); | |
278 | next if $req_state eq 'stopped'; | |
d54c04bd | 279 | # NOTE: 'ignored' ones are already dropped by the manager from service_status |
9c7d068b | 280 | next if $req_state eq 'freeze'; |
38545741 TL |
281 | # erroneous services are not managed by HA, don't count them as active |
282 | next if $req_state eq 'error'; | |
4931b586 TL |
283 | # request_start is for (optional) better node selection for stop -> started transition |
284 | next if $req_state eq 'request_start'; | |
546e2f1f DM |
285 | |
286 | $count++; | |
287 | } | |
289e4784 | 288 | |
546e2f1f DM |
289 | return $count; |
290 | } | |
5bd7aa54 DM |
291 | |
292 | my $wrote_lrm_status_at_startup = 0; | |
293 | ||
5f095798 DM |
294 | sub do_one_iteration { |
295 | my ($self) = @_; | |
296 | ||
297 | my $haenv = $self->{haenv}; | |
298 | ||
da6f0416 TL |
299 | $haenv->loop_start_hook(); |
300 | ||
3df15380 TL |
301 | $self->{cluster_state_update} = $haenv->cluster_state_update(); |
302 | ||
da6f0416 TL |
303 | my $res = $self->work(); |
304 | ||
305 | $haenv->loop_end_hook(); | |
306 | ||
307 | return $res; | |
308 | } | |
309 | ||
abc1499b TL |
310 | # NOTE: this is disabling the self-fence mechanism, so it must NOT be called with active services |
311 | # It's normally *only* OK on graceful shutdown (with no services, or all services frozen) | |
312 | my sub give_up_watchdog_protection { | |
313 | my ($self) = @_; | |
314 | ||
315 | if ($self->{ha_agent_wd}) { | |
316 | $self->{haenv}->watchdog_close($self->{ha_agent_wd}); | |
317 | delete $self->{ha_agent_wd}; # only delete after close! | |
318 | } | |
319 | } | |
320 | ||
da6f0416 TL |
321 | sub work { |
322 | my ($self) = @_; | |
323 | ||
324 | my $haenv = $self->{haenv}; | |
325 | ||
c5ec095f | 326 | if (!$wrote_lrm_status_at_startup) { |
79829202 | 327 | if ($self->update_lrm_status()) { |
c5ec095f DM |
328 | $wrote_lrm_status_at_startup = 1; |
329 | } else { | |
330 | # do nothing | |
331 | $haenv->sleep(5); | |
332 | return $self->{shutdown_request} ? 0 : 1; | |
333 | } | |
5bd7aa54 | 334 | } |
289e4784 | 335 | |
5f095798 DM |
336 | my $status = $self->get_local_status(); |
337 | my $state = $status->{state}; | |
338 | ||
8e940b68 | 339 | $self->update_service_status(); |
067cdf33 | 340 | |
303490d8 | 341 | my $fence_request = $self->is_fence_requested(); |
289e4784 TL |
342 | |
343 | # do state changes first | |
5f095798 DM |
344 | |
345 | my $ctime = $haenv->get_time(); | |
346 | ||
b0bf08a9 | 347 | if ($state eq 'wait_for_agent_lock') { |
5f095798 | 348 | |
546e2f1f | 349 | my $service_count = $self->active_service_count(); |
5f095798 | 350 | |
067cdf33 | 351 | if (!$fence_request && $service_count && $haenv->quorate()) { |
0bba8f60 DM |
352 | if ($self->get_protected_ha_agent_lock()) { |
353 | $self->set_local_status({ state => 'active' }); | |
5f095798 DM |
354 | } |
355 | } | |
289e4784 | 356 | |
5f095798 DM |
357 | } elsif ($state eq 'lost_agent_lock') { |
358 | ||
067cdf33 | 359 | if (!$fence_request && $haenv->quorate()) { |
0bba8f60 DM |
360 | if ($self->get_protected_ha_agent_lock()) { |
361 | $self->set_local_status({ state => 'active' }); | |
5f095798 DM |
362 | } |
363 | } | |
364 | ||
0bba8f60 | 365 | } elsif ($state eq 'active') { |
5f095798 | 366 | |
289e4784 | 367 | if ($fence_request) { |
067cdf33 | 368 | $haenv->log('err', "node need to be fenced - releasing agent_lock\n"); |
289e4784 | 369 | $self->set_local_status({ state => 'lost_agent_lock'}); |
067cdf33 | 370 | } elsif (!$self->get_protected_ha_agent_lock()) { |
5f095798 | 371 | $self->set_local_status({ state => 'lost_agent_lock'}); |
73faade5 | 372 | } elsif ($self->is_maintenance_requested()) { |
99278e06 | 373 | $self->set_local_status({ state => 'maintenance'}); |
21051707 TL |
374 | } else { |
375 | if (!$self->has_configured_service_on_local_node() && !$self->run_workers()) { | |
376 | # no active service configured for this node and all (old) workers are done | |
377 | $self->{active_idle_rounds}++; | |
378 | if ($self->{active_idle_rounds} > $max_active_idle_rounds) { | |
379 | $haenv->log('info', "node had no service configured for $max_active_idle_rounds rounds, going idle.\n"); | |
380 | # safety: no active service & no running worker for quite some time -> OK | |
381 | $haenv->release_ha_agent_lock(); | |
382 | give_up_watchdog_protection($self); | |
383 | $self->set_local_status({ state => 'wait_for_agent_lock'}); | |
384 | $self->{active_idle_rounds} = 0; | |
385 | } | |
386 | } elsif ($self->{active_idle_rounds}) { | |
387 | $self->{active_idle_rounds} = 0; | |
388 | } | |
99278e06 TL |
389 | } |
390 | } elsif ($state eq 'maintenance') { | |
391 | ||
392 | if ($fence_request) { | |
393 | $haenv->log('err', "node need to be fenced during maintenance mode - releasing agent_lock\n"); | |
394 | $self->set_local_status({ state => 'lost_agent_lock'}); | |
395 | } elsif (!$self->get_protected_ha_agent_lock()) { | |
396 | $self->set_local_status({ state => 'lost_agent_lock'}); | |
5f095798 DM |
397 | } |
398 | } | |
399 | ||
400 | $status = $self->get_local_status(); | |
401 | $state = $status->{state}; | |
402 | ||
403 | # do work | |
404 | ||
405 | if ($state eq 'wait_for_agent_lock') { | |
406 | ||
407 | return 0 if $self->{shutdown_request}; | |
289e4784 | 408 | |
79829202 | 409 | $self->update_lrm_status(); |
289e4784 | 410 | |
5f095798 | 411 | $haenv->sleep(5); |
289e4784 | 412 | |
0bba8f60 | 413 | } elsif ($state eq 'active') { |
5f095798 DM |
414 | |
415 | my $startime = $haenv->get_time(); | |
416 | ||
417 | my $max_time = 10; | |
418 | ||
419 | my $shutdown = 0; | |
420 | ||
421 | # do work (max_time seconds) | |
422 | eval { | |
423 | # fixme: set alert timer | |
424 | ||
8e940b68 TL |
425 | # if we could not get the current service status there's no point |
426 | # in doing anything, try again next round. | |
427 | return if !$self->update_service_status(); | |
428 | ||
5f095798 DM |
429 | if ($self->{shutdown_request}) { |
430 | ||
499f06e3 | 431 | if ($self->{mode} eq 'restart') { |
ad645699 FG |
432 | # catch exited workers to update service state |
433 | my $workers = $self->run_workers(); | |
499f06e3 | 434 | my $service_count = $self->active_service_count(); |
5f095798 | 435 | |
ad645699 FG |
436 | if ($service_count == 0 && $workers == 0) { |
437 | # safety: no active services or workers -> OK | |
438 | give_up_watchdog_protection($self); | |
439 | $shutdown = 1; | |
e23f674c | 440 | |
ad645699 FG |
441 | # restart with no or freezed services, release the lock |
442 | $haenv->release_ha_agent_lock(); | |
116dea30 DM |
443 | } |
444 | } else { | |
445 | ||
446 | if ($self->run_workers() == 0) { | |
447 | if ($self->{shutdown_errors} == 0) { | |
abc1499b TL |
448 | # safety: no active services and LRM shutdown -> OK |
449 | give_up_watchdog_protection($self); | |
0e5b1a43 TL |
450 | |
451 | # shutdown with all services stopped thus release the lock | |
452 | $haenv->release_ha_agent_lock(); | |
499f06e3 | 453 | } |
5f095798 | 454 | |
499f06e3 DM |
455 | $shutdown = 1; |
456 | } | |
5f095798 | 457 | } |
c4a221bc | 458 | } else { |
724bd3f3 TL |
459 | if (!$self->{cluster_state_update}) { |
460 | # update failed but we could still renew our lock (cfs restart?), | |
461 | # safely skip manage and expect to update just fine next round | |
462 | $haenv->log('notice', "temporary inconsistent cluster state " . | |
463 | "(cfs restart?), skip round"); | |
464 | return; | |
465 | } | |
c4a221bc DM |
466 | |
467 | $self->manage_resources(); | |
067cdf33 | 468 | |
5f095798 DM |
469 | } |
470 | }; | |
471 | if (my $err = $@) { | |
472 | $haenv->log('err', "got unexpected error - $err"); | |
473 | } | |
474 | ||
79829202 | 475 | $self->update_lrm_status(); |
289e4784 | 476 | |
5f095798 DM |
477 | return 0 if $shutdown; |
478 | ||
479 | $haenv->sleep_until($startime + $max_time); | |
480 | ||
481 | } elsif ($state eq 'lost_agent_lock') { | |
289e4784 | 482 | |
abc1499b | 483 | # NOTE: watchdog is active an will trigger soon! |
5f095798 | 484 | # so we hope to get the lock back soon! |
5f095798 DM |
485 | if ($self->{shutdown_request}) { |
486 | ||
546e2f1f | 487 | my $service_count = $self->active_service_count(); |
5f095798 | 488 | |
546e2f1f | 489 | if ($service_count > 0) { |
289e4784 | 490 | $haenv->log('err', "get shutdown request in state 'lost_agent_lock' - " . |
546e2f1f | 491 | "detected $service_count running services"); |
5f095798 | 492 | |
c5c7faf6 TL |
493 | if ($self->{mode} eq 'restart') { |
494 | my $state_mt = $self->{status}->{state_change_time}; | |
495 | ||
496 | # watchdog should have already triggered, so either it's set | |
497 | # set to noboot or it failed. As we are in restart mode, and | |
498 | # have infinity stoptimeout -> exit now - we don't touch services | |
499 | # or change state, so this is save, relatively speaking | |
500 | if (($haenv->get_time() - $state_mt) > 90) { | |
501 | $haenv->log('err', "lost agent lock and restart request for over 90 seconds - giving up!"); | |
502 | return 0; | |
503 | } | |
504 | } | |
546e2f1f | 505 | } else { |
abc1499b TL |
506 | # safety: all services are stopped, so we can close the watchdog |
507 | give_up_watchdog_protection($self); | |
289e4784 | 508 | |
546e2f1f | 509 | return 0; |
5f095798 | 510 | } |
5f095798 DM |
511 | } |
512 | ||
b0bf08a9 DM |
513 | $haenv->sleep(5); |
514 | ||
99278e06 TL |
515 | } elsif ($state eq 'maintenance') { |
516 | ||
517 | my $startime = $haenv->get_time(); | |
518 | return if !$self->update_service_status(); | |
519 | ||
520 | # wait until all active services moved away | |
521 | my $service_count = $self->active_service_count(); | |
522 | ||
523 | my $exit_lrm = 0; | |
524 | ||
525 | if ($self->{shutdown_request}) { | |
526 | if ($service_count == 0 && $self->run_workers() == 0) { | |
abc1499b TL |
527 | # safety: going into maintenance and all active services got moved -> OK |
528 | give_up_watchdog_protection($self); | |
99278e06 TL |
529 | |
530 | $exit_lrm = 1; | |
531 | ||
532 | # restart with no or freezed services, release the lock | |
533 | $haenv->release_ha_agent_lock(); | |
534 | } | |
535 | } | |
536 | ||
537 | $self->manage_resources() if !$exit_lrm; | |
538 | ||
539 | $self->update_lrm_status(); | |
540 | ||
541 | return 0 if $exit_lrm; | |
542 | ||
543 | $haenv->sleep_until($startime + 5); | |
544 | ||
5f095798 DM |
545 | } else { |
546 | ||
547 | die "got unexpected status '$state'\n"; | |
548 | ||
549 | } | |
550 | ||
551 | return 1; | |
552 | } | |
553 | ||
116dea30 | 554 | sub run_workers { |
c4a221bc DM |
555 | my ($self) = @_; |
556 | ||
557 | my $haenv = $self->{haenv}; | |
558 | ||
f31b7e94 | 559 | my $starttime = $haenv->get_time(); |
c4a221bc | 560 | |
a28fa330 TL |
561 | # number of workers to start, if 0 we exec the command directly witouth forking |
562 | my $max_workers = $haenv->get_max_workers(); | |
6dbf93a0 | 563 | my $sc = $haenv->read_service_config(); |
f31b7e94 | 564 | |
65c1fbac TL |
565 | my $worker = $self->{workers}; |
566 | # we only got limited time but want to ensure that every queued worker is scheduled | |
567 | # eventually, so sort by the count a worker was seen here in this loop | |
568 | my $fair_sorter = sub { | |
569 | $worker->{$b}->{start_tries} <=> $worker->{$a}->{start_tries} || $a cmp $b | |
570 | }; | |
571 | ||
eef4f863 | 572 | while (($haenv->get_time() - $starttime) <= 8) { |
f613e426 | 573 | my $count = $self->check_active_workers(); |
c4a221bc | 574 | |
65c1fbac TL |
575 | for my $sid (sort $fair_sorter grep { !$worker->{$_}->{pid} } keys %$worker) { |
576 | my $w = $worker->{$sid}; | |
577 | # higher try-count means higher priority especially compared to newly queued jobs, so | |
578 | # count every try to avoid starvation | |
579 | $w->{start_tries}++; | |
4931b586 | 580 | # FIXME: should be last and ensure that check_active_workers is called sooner |
65c1fbac | 581 | next if $count >= $max_workers && $max_workers > 0; |
f613e426 TL |
582 | |
583 | # only fork if we may, else call exec_resource_agent directly (e.g. for tests) | |
584 | if ($max_workers > 0) { | |
585 | my $pid = fork(); | |
586 | if (!defined($pid)) { | |
587 | $haenv->log('err', "forking worker failed - $!"); | |
588 | $count = 0; last; # abort, try later | |
589 | } elsif ($pid == 0) { | |
590 | $haenv->after_fork(); # cleanup | |
591 | ||
592 | # do work | |
c4a221bc DM |
593 | my $res = -1; |
594 | eval { | |
3ac1ee6b | 595 | $res = $self->exec_resource_agent($sid, $sc->{$sid}, $w->{state}, $w->{params}); |
c4a221bc DM |
596 | }; |
597 | if (my $err = $@) { | |
f31b7e94 | 598 | $haenv->log('err', $err); |
f613e426 | 599 | POSIX::_exit(-1); |
116dea30 | 600 | } |
f613e426 TL |
601 | POSIX::_exit($res); |
602 | } else { | |
603 | $count++; | |
604 | $w->{pid} = $pid; | |
605 | } | |
606 | } else { | |
607 | my $res = -1; | |
608 | eval { | |
609 | $res = $self->exec_resource_agent($sid, $sc->{$sid}, $w->{state}, $w->{params}); | |
610 | $res = $res << 8 if $res > 0; | |
611 | }; | |
612 | if (my $err = $@) { | |
613 | $haenv->log('err', $err); | |
614 | } | |
615 | if (defined($w->{uid})) { | |
616 | $self->resource_command_finished($sid, $w->{uid}, $res); | |
617 | } else { | |
618 | $self->stop_command_finished($sid, $res); | |
c4a221bc DM |
619 | } |
620 | } | |
621 | } | |
622 | ||
623 | last if !$count; | |
624 | ||
f31b7e94 | 625 | $haenv->sleep(1); |
c4a221bc | 626 | } |
116dea30 DM |
627 | |
628 | return scalar(keys %{$self->{workers}}); | |
629 | } | |
630 | ||
631 | sub manage_resources { | |
632 | my ($self) = @_; | |
633 | ||
634 | my $haenv = $self->{haenv}; | |
635 | ||
636 | my $nodename = $haenv->nodename(); | |
637 | ||
638 | my $ss = $self->{service_status}; | |
639 | ||
5a28da91 TL |
640 | foreach my $sid (keys %{$self->{restart_tries}}) { |
641 | delete $self->{restart_tries}->{$sid} if !$ss->{$sid}; | |
642 | } | |
643 | ||
116dea30 DM |
644 | foreach my $sid (keys %$ss) { |
645 | my $sd = $ss->{$sid}; | |
b538340c | 646 | next if !$sd->{node} || !$sd->{uid}; |
116dea30 | 647 | next if $sd->{node} ne $nodename; |
b538340c TL |
648 | my $request_state = $sd->{state}; |
649 | next if !defined($request_state); | |
90a24755 TL |
650 | # can only happen for restricted groups where the failed node itself needs to be the |
651 | # reocvery target. Always let the master first do so, it will then marked as 'stopped' and | |
652 | # we can just continue normally. But we must NOT do anything with it while still in recovery | |
b538340c TL |
653 | next if $request_state eq 'recovery'; |
654 | next if $request_state eq 'freeze'; | |
4931b586 TL |
655 | # intermediate step for optional better node selection on stop -> start request state change |
656 | next if $request_state eq 'request_start'; | |
90a24755 | 657 | |
b538340c | 658 | $self->queue_resource_command($sid, $sd->{uid}, $request_state, { |
90a24755 TL |
659 | 'target' => $sd->{target}, |
660 | 'timeout' => $sd->{timeout}, | |
661 | }); | |
116dea30 DM |
662 | } |
663 | ||
664 | return $self->run_workers(); | |
c4a221bc DM |
665 | } |
666 | ||
c4a221bc | 667 | sub queue_resource_command { |
3ac1ee6b | 668 | my ($self, $sid, $uid, $state, $params) = @_; |
c4a221bc | 669 | |
b538340c TL |
670 | # do not queue the exact same command twice as this may lead to an inconsistent HA state when |
671 | # the first command fails but the CRM does not process its failure right away and the LRM starts | |
672 | # a second try, without the CRM knowing of it (race condition) The 'stopped' command is an | |
673 | # exception as we do not process its result in the CRM and we want to execute it always (even | |
674 | # with no active CRM) | |
35cbb764 TL |
675 | return if $state ne 'stopped' && $uid && defined($self->{results}->{$uid}); |
676 | ||
c4a221bc DM |
677 | if (my $w = $self->{workers}->{$sid}) { |
678 | return if $w->{pid}; # already started | |
679 | # else, delete and overwrite queue entry with new command | |
680 | delete $self->{workers}->{$sid}; | |
681 | } | |
682 | ||
683 | $self->{workers}->{$sid} = { | |
684 | sid => $sid, | |
685 | uid => $uid, | |
686 | state => $state, | |
65c1fbac | 687 | start_tries => 0, |
c4a221bc | 688 | }; |
e88469ba | 689 | |
3ac1ee6b | 690 | $self->{workers}->{$sid}->{params} = $params if $params; |
c4a221bc DM |
691 | } |
692 | ||
693 | sub check_active_workers { | |
694 | my ($self) = @_; | |
695 | ||
696 | # finish/count workers | |
697 | my $count = 0; | |
698 | foreach my $sid (keys %{$self->{workers}}) { | |
699 | my $w = $self->{workers}->{$sid}; | |
b538340c TL |
700 | my $pid = $w->{pid} || next; |
701 | ||
702 | my $waitpid = waitpid($pid, WNOHANG); # check status | |
703 | if (defined($waitpid) && ($waitpid == $pid)) { | |
704 | if (defined($w->{uid})) { | |
705 | $self->resource_command_finished($sid, $w->{uid}, $?); | |
c4a221bc | 706 | } else { |
b538340c | 707 | $self->stop_command_finished($sid, $?); |
c4a221bc | 708 | } |
b538340c TL |
709 | } else { |
710 | $count++; # still active | |
c4a221bc DM |
711 | } |
712 | } | |
289e4784 | 713 | |
c4a221bc DM |
714 | return $count; |
715 | } | |
716 | ||
116dea30 DM |
717 | sub stop_command_finished { |
718 | my ($self, $sid, $status) = @_; | |
719 | ||
720 | my $haenv = $self->{haenv}; | |
721 | ||
722 | my $w = delete $self->{workers}->{$sid}; | |
723 | return if !$w; # should not happen | |
724 | ||
725 | my $exit_code = -1; | |
726 | ||
727 | if ($status == -1) { | |
728 | $haenv->log('err', "resource agent $sid finished - failed to execute"); | |
729 | } elsif (my $sig = ($status & 127)) { | |
730 | $haenv->log('err', "resource agent $sid finished - got signal $sig"); | |
731 | } else { | |
732 | $exit_code = ($status >> 8); | |
733 | } | |
734 | ||
735 | if ($exit_code != 0) { | |
736 | $self->{shutdown_errors}++; | |
737 | } | |
738 | } | |
739 | ||
c4a221bc DM |
740 | sub resource_command_finished { |
741 | my ($self, $sid, $uid, $status) = @_; | |
742 | ||
743 | my $haenv = $self->{haenv}; | |
744 | ||
745 | my $w = delete $self->{workers}->{$sid}; | |
746 | return if !$w; # should not happen | |
747 | ||
748 | my $exit_code = -1; | |
749 | ||
750 | if ($status == -1) { | |
289e4784 | 751 | $haenv->log('err', "resource agent $sid finished - failed to execute"); |
c4a221bc | 752 | } elsif (my $sig = ($status & 127)) { |
0f70400d | 753 | $haenv->log('err', "resource agent $sid finished - got signal $sig"); |
c4a221bc DM |
754 | } else { |
755 | $exit_code = ($status >> 8); | |
c4a221bc DM |
756 | } |
757 | ||
ea4443cc TL |
758 | $exit_code = $self->handle_service_exitcode($sid, $w->{state}, $exit_code); |
759 | ||
280ee5d5 DM |
760 | return if $exit_code == ETRY_AGAIN; # tell nobody, simply retry |
761 | ||
c4a221bc DM |
762 | $self->{results}->{$uid} = { |
763 | sid => $w->{sid}, | |
764 | state => $w->{state}, | |
765 | exit_code => $exit_code, | |
766 | }; | |
767 | ||
768 | my $ss = $self->{service_status}; | |
769 | ||
770 | # compute hash of valid/existing uids | |
771 | my $valid_uids = {}; | |
772 | foreach my $sid (keys %$ss) { | |
773 | my $sd = $ss->{$sid}; | |
774 | next if !$sd->{uid}; | |
775 | $valid_uids->{$sd->{uid}} = 1; | |
776 | } | |
777 | ||
778 | my $results = {}; | |
779 | foreach my $id (keys %{$self->{results}}) { | |
780 | next if !$valid_uids->{$id}; | |
781 | $results->{$id} = $self->{results}->{$id}; | |
782 | } | |
783 | $self->{results} = $results; | |
c4a221bc DM |
784 | } |
785 | ||
ea4443cc TL |
786 | # processes the exit code from a finished resource agent, so that the CRM knows |
787 | # if the LRM wants to retry an action based on the current recovery policies for | |
788 | # the failed service, or the CRM itself must try to recover from the failure. | |
789 | sub handle_service_exitcode { | |
790 | my ($self, $sid, $cmd, $exit_code) = @_; | |
791 | ||
792 | my $haenv = $self->{haenv}; | |
793 | my $tries = $self->{restart_tries}; | |
794 | ||
795 | my $sc = $haenv->read_service_config(); | |
aaabde6a DM |
796 | |
797 | my $max_restart = 0; | |
798 | ||
799 | if (my $cd = $sc->{$sid}) { | |
800 | $max_restart = $cd->{max_restart}; | |
801 | } | |
ea4443cc TL |
802 | |
803 | if ($cmd eq 'started') { | |
804 | ||
a89ff919 | 805 | if ($exit_code == SUCCESS) { |
ea4443cc TL |
806 | |
807 | $tries->{$sid} = 0; | |
808 | ||
809 | return $exit_code; | |
810 | ||
a89ff919 | 811 | } elsif ($exit_code == ERROR) { |
ea4443cc TL |
812 | |
813 | $tries->{$sid} = 0 if !defined($tries->{$sid}); | |
814 | ||
aaabde6a | 815 | if ($tries->{$sid} >= $max_restart) { |
ea4443cc TL |
816 | $haenv->log('err', "unable to start service $sid on local node". |
817 | " after $tries->{$sid} retries"); | |
818 | $tries->{$sid} = 0; | |
a89ff919 | 819 | return ERROR; |
ea4443cc TL |
820 | } |
821 | ||
e9e1cd68 TL |
822 | $tries->{$sid}++; |
823 | ||
824 | $haenv->log('warning', "restart policy: retry number $tries->{$sid}" . | |
825 | " for service '$sid'"); | |
a89ff919 TL |
826 | # tell CRM that we retry the start |
827 | return ETRY_AGAIN; | |
ea4443cc TL |
828 | } |
829 | } | |
830 | ||
831 | return $exit_code; | |
832 | ||
833 | } | |
834 | ||
2a045f55 | 835 | sub exec_resource_agent { |
3ac1ee6b | 836 | my ($self, $sid, $service_config, $cmd, $params) = @_; |
2a045f55 TL |
837 | |
838 | # setup execution environment | |
839 | ||
840 | $ENV{'PATH'} = '/sbin:/bin:/usr/sbin:/usr/bin'; | |
841 | ||
2a045f55 TL |
842 | my $haenv = $self->{haenv}; |
843 | ||
844 | my $nodename = $haenv->nodename(); | |
845 | ||
0087839a | 846 | my (undef, $service_type, $service_name) = $haenv->parse_sid($sid); |
2a045f55 TL |
847 | |
848 | my $plugin = PVE::HA::Resources->lookup($service_type); | |
849 | if (!$plugin) { | |
850 | $haenv->log('err', "service type '$service_type' not implemented"); | |
851 | return EUNKNOWN_SERVICE_TYPE; | |
852 | } | |
853 | ||
aaabde6a DM |
854 | if (!$service_config) { |
855 | $haenv->log('err', "missing resource configuration for '$sid'"); | |
856 | return EUNKNOWN_SERVICE; | |
857 | } | |
858 | ||
d338a56f TL |
859 | # process error state early |
860 | if ($cmd eq 'error') { | |
d338a56f TL |
861 | $haenv->log('err', "service $sid is in an error state and needs manual " . |
862 | "intervention. Look up 'ERROR RECOVERY' in the documentation."); | |
863 | ||
864 | return SUCCESS; # error always succeeds | |
865 | } | |
866 | ||
2a045f55 TL |
867 | if ($service_config->{node} ne $nodename) { |
868 | $haenv->log('err', "service '$sid' not on this node"); | |
869 | return EWRONG_NODE; | |
870 | } | |
871 | ||
872 | my $id = $service_name; | |
873 | ||
874 | my $running = $plugin->check_running($haenv, $id); | |
875 | ||
876 | if ($cmd eq 'started') { | |
877 | ||
878 | return SUCCESS if $running; | |
879 | ||
880 | $haenv->log("info", "starting service $sid"); | |
881 | ||
882 | $plugin->start($haenv, $id); | |
883 | ||
884 | $running = $plugin->check_running($haenv, $id); | |
885 | ||
886 | if ($running) { | |
887 | $haenv->log("info", "service status $sid started"); | |
888 | return SUCCESS; | |
889 | } else { | |
890 | $haenv->log("warning", "unable to start service $sid"); | |
891 | return ERROR; | |
892 | } | |
893 | ||
894 | } elsif ($cmd eq 'request_stop' || $cmd eq 'stopped') { | |
895 | ||
896 | return SUCCESS if !$running; | |
897 | ||
e4ef317d FE |
898 | if (defined($params->{timeout})) { |
899 | $haenv->log("info", "stopping service $sid (timeout=$params->{timeout})"); | |
900 | } else { | |
901 | $haenv->log("info", "stopping service $sid"); | |
902 | } | |
2a045f55 | 903 | |
e4ef317d | 904 | $plugin->shutdown($haenv, $id, $params->{timeout}); |
2a045f55 TL |
905 | |
906 | $running = $plugin->check_running($haenv, $id); | |
907 | ||
908 | if (!$running) { | |
909 | $haenv->log("info", "service status $sid stopped"); | |
910 | return SUCCESS; | |
911 | } else { | |
912 | $haenv->log("info", "unable to stop stop service $sid (still running)"); | |
913 | return ERROR; | |
914 | } | |
915 | ||
314ef257 | 916 | } elsif ($cmd eq 'migrate' || $cmd eq 'relocate' || $cmd eq 'request_start_balance') { |
2a045f55 | 917 | |
3ac1ee6b | 918 | my $target = $params->{target}; |
2a045f55 TL |
919 | if (!defined($target)) { |
920 | die "$cmd '$sid' failed - missing target\n" if !defined($target); | |
921 | return EINVALID_PARAMETER; | |
922 | } | |
923 | ||
924 | if ($service_config->{node} eq $target) { | |
925 | # already there | |
926 | return SUCCESS; | |
927 | } | |
928 | ||
929 | my $online = ($cmd eq 'migrate') ? 1 : 0; | |
930 | ||
ea28f873 | 931 | my $res = $plugin->migrate($haenv, $id, $target, $online); |
2a045f55 TL |
932 | |
933 | # something went wrong if service is still on this node | |
ea28f873 | 934 | if (!$res) { |
2a045f55 TL |
935 | $haenv->log("err", "service $sid not moved (migration error)"); |
936 | return ERROR; | |
937 | } | |
938 | ||
939 | return SUCCESS; | |
940 | ||
2a045f55 TL |
941 | } |
942 | ||
943 | $haenv->log("err", "implement me (cmd '$cmd')"); | |
944 | return EUNKNOWN_COMMAND; | |
945 | } | |
946 | ||
947 | ||
5f095798 | 948 | 1; |