]>
Commit | Line | Data |
---|---|---|
c0bbd038 DM |
1 | package PVE::HA::Manager; |
2 | ||
3 | use strict; | |
4 | use warnings; | |
c4a221bc | 5 | use Digest::MD5 qw(md5_base64); |
c0bbd038 | 6 | |
c142ebc9 | 7 | use PVE::Tools; |
a89ff919 | 8 | use PVE::HA::Tools ':exit_codes'; |
c0bbd038 | 9 | use PVE::HA::NodeStatus; |
5d724d4d | 10 | use PVE::HA::Usage::Basic; |
561e7f4b | 11 | use PVE::HA::Usage::Static; |
c0bbd038 | 12 | |
a3ffb0b3 TL |
13 | ## Variable Name & Abbreviations Convention |
14 | # | |
15 | # The HA stack has some variables it uses frequently and thus abbreviates it such that it may be | |
16 | # confusing for new readers. Here's a short list of the most common used. | |
17 | # | |
18 | # NOTE: variables should be assumed to be read only if not otherwise stated, only use the specific | |
19 | # methods to re-compute/read/alter them. | |
20 | # | |
21 | # - $haenv -> HA environment, the main interface to the simulator/test/real world | |
22 | # - $sid -> Service ID, unique identifier for a service, `type:vmid` is common | |
23 | # | |
24 | # - $ms -> Master/Manager Status, contains runtime info from the current active manager | |
25 | # - $ns -> Node Status, hash holding online/offline status about all nodes | |
26 | # | |
27 | # - $ss -> Service Status, hash holding the current state (last LRM cmd result, failed starts | |
28 | # or migrates, maintenance fallback node, for *all* services ... | |
29 | # - $sd -> Service Data, the service status of a *single* service, iow. $ss->{$sid} | |
30 | # | |
31 | # - $sc -> Service Configuration, hash for all services including target state, group, ... | |
0869c306 | 32 | # - $cd -> Configuration Data, the service config of a *single* service, iow. $sc->{$sid} |
a3ffb0b3 TL |
33 | # |
34 | # Try to avoid adding new two letter (or similar over abbreviated) names, but also don't send | |
35 | # patches for changing above, as that set is mostly sensible and should be easy to remember once | |
36 | # spending a bit time in the HA code base. | |
37 | ||
c0bbd038 | 38 | sub new { |
8f0bb968 | 39 | my ($this, $haenv) = @_; |
c0bbd038 DM |
40 | |
41 | my $class = ref($this) || $this; | |
42 | ||
6ee64cfc | 43 | my $self = bless { haenv => $haenv }, $class; |
8f0bb968 | 44 | |
6ee64cfc | 45 | my $old_ms = $haenv->read_manager_status(); |
8f0bb968 | 46 | |
6ee64cfc TL |
47 | # we only copy the state part of the manager which cannot be auto generated |
48 | ||
49 | $self->{ns} = PVE::HA::NodeStatus->new($haenv, $old_ms->{node_status} || {}); | |
8f0bb968 | 50 | |
59fd7207 | 51 | # fixme: use separate class PVE::HA::ServiceStatus |
6ee64cfc TL |
52 | $self->{ss} = $old_ms->{service_status} || {}; |
53 | ||
54 | $self->{ms} = { master_node => $haenv->nodename() }; | |
c0bbd038 | 55 | |
f74f8ffb FE |
56 | my $dc_cfg = $haenv->get_datacenter_settings(); |
57 | $self->{'scheduler-mode'} = $dc_cfg->{crs}->{ha} ? $dc_cfg->{crs}->{ha} : 'basic'; | |
58 | $haenv->log('info', "using scheduler mode '$self->{'scheduler-mode'}'") | |
59 | if $self->{'scheduler-mode'} ne 'basic'; | |
60 | ||
c0bbd038 DM |
61 | return $self; |
62 | } | |
63 | ||
d84da043 DM |
64 | sub cleanup { |
65 | my ($self) = @_; | |
66 | ||
67 | # todo: ? | |
68 | } | |
69 | ||
8f0bb968 | 70 | sub flush_master_status { |
c0bbd038 DM |
71 | my ($self) = @_; |
72 | ||
59fd7207 | 73 | my ($haenv, $ms, $ns, $ss) = ($self->{haenv}, $self->{ms}, $self->{ns}, $self->{ss}); |
c0bbd038 | 74 | |
8f0bb968 | 75 | $ms->{node_status} = $ns->{status}; |
59fd7207 | 76 | $ms->{service_status} = $ss; |
d2f612cf | 77 | $ms->{timestamp} = $haenv->get_time(); |
289e4784 | 78 | |
8f0bb968 | 79 | $haenv->write_manager_status($ms); |
289e4784 | 80 | } |
c0bbd038 | 81 | |
48a6ba2a TL |
82 | sub get_service_group { |
83 | my ($groups, $online_node_usage, $service_conf) = @_; | |
f7ccd1b3 | 84 | |
09c5c4bf TL |
85 | my $group = {}; |
86 | # add all online nodes to default group to allow try_next when no group set | |
5d724d4d | 87 | $group->{nodes}->{$_} = 1 for $online_node_usage->list_nodes(); |
abc920b4 | 88 | |
09c5c4bf | 89 | # overwrite default if service is bound to a specific group |
3458a0e3 TL |
90 | if (my $group_id = $service_conf->{group}) { |
91 | $group = $groups->{ids}->{$group_id} if $groups->{ids}->{$group_id}; | |
92 | } | |
abc920b4 | 93 | |
48a6ba2a TL |
94 | return $group; |
95 | } | |
96 | ||
97 | # groups available nodes with their priority as group index | |
98 | sub get_node_priority_groups { | |
99 | my ($group, $online_node_usage) = @_; | |
100 | ||
abc920b4 DM |
101 | my $pri_groups = {}; |
102 | my $group_members = {}; | |
e0a56314 | 103 | foreach my $entry (keys %{$group->{nodes}}) { |
abc920b4 DM |
104 | my ($node, $pri) = ($entry, 0); |
105 | if ($entry =~ m/^(\S+):(\d+)$/) { | |
106 | ($node, $pri) = ($1, $2); | |
107 | } | |
5d724d4d | 108 | next if !$online_node_usage->contains_node($node); # offline |
abc920b4 DM |
109 | $pri_groups->{$pri}->{$node} = 1; |
110 | $group_members->{$node} = $pri; | |
111 | } | |
f7ccd1b3 | 112 | |
abc920b4 DM |
113 | # add non-group members to unrestricted groups (priority -1) |
114 | if (!$group->{restricted}) { | |
115 | my $pri = -1; | |
5d724d4d | 116 | for my $node ($online_node_usage->list_nodes()) { |
abc920b4 DM |
117 | next if defined($group_members->{$node}); |
118 | $pri_groups->{$pri}->{$node} = 1; | |
119 | $group_members->{$node} = -1; | |
120 | } | |
121 | } | |
122 | ||
48a6ba2a TL |
123 | return ($pri_groups, $group_members); |
124 | } | |
125 | ||
126 | sub select_service_node { | |
b2598576 | 127 | my ($groups, $online_node_usage, $sid, $service_conf, $current_node, $try_next, $tried_nodes, $maintenance_fallback) = @_; |
48a6ba2a TL |
128 | |
129 | my $group = get_service_group($groups, $online_node_usage, $service_conf); | |
130 | ||
131 | my ($pri_groups, $group_members) = get_node_priority_groups($group, $online_node_usage); | |
132 | ||
abc920b4 DM |
133 | my @pri_list = sort {$b <=> $a} keys %$pri_groups; |
134 | return undef if !scalar(@pri_list); | |
09c5c4bf TL |
135 | |
136 | # stay on current node if possible (avoids random migrations) | |
abc920b4 DM |
137 | if (!$try_next && $group->{nofailback} && defined($group_members->{$current_node})) { |
138 | return $current_node; | |
139 | } | |
140 | ||
141 | # select node from top priority node list | |
142 | ||
143 | my $top_pri = $pri_list[0]; | |
144 | ||
e6eeb7dc TL |
145 | # try to avoid nodes where the service failed already if we want to relocate |
146 | if ($try_next) { | |
147 | foreach my $node (@$tried_nodes) { | |
148 | delete $pri_groups->{$top_pri}->{$node}; | |
149 | } | |
150 | } | |
151 | ||
631ba60e FE |
152 | return $maintenance_fallback |
153 | if defined($maintenance_fallback) && $pri_groups->{$top_pri}->{$maintenance_fallback}; | |
154 | ||
c724ce1b FE |
155 | return $current_node if !$try_next && $pri_groups->{$top_pri}->{$current_node}; |
156 | ||
5d724d4d | 157 | my $scores = $online_node_usage->score_nodes_to_start_service($sid, $current_node); |
289e4784 | 158 | my @nodes = sort { |
5d724d4d | 159 | $scores->{$a} <=> $scores->{$b} || $a cmp $b |
c142ebc9 | 160 | } keys %{$pri_groups->{$top_pri}}; |
abc920b4 DM |
161 | |
162 | my $found; | |
163 | for (my $i = scalar(@nodes) - 1; $i >= 0; $i--) { | |
164 | my $node = $nodes[$i]; | |
165 | if ($node eq $current_node) { | |
166 | $found = $i; | |
abc920b4 DM |
167 | } |
168 | } | |
169 | ||
abc920b4 | 170 | if ($try_next) { |
abc920b4 DM |
171 | if (defined($found) && ($found < (scalar(@nodes) - 1))) { |
172 | return $nodes[$found + 1]; | |
173 | } else { | |
174 | return $nodes[0]; | |
175 | } | |
abc920b4 | 176 | } else { |
abc920b4 | 177 | return $nodes[0]; |
abc920b4 | 178 | } |
f7ccd1b3 DM |
179 | } |
180 | ||
c4a221bc DM |
181 | my $uid_counter = 0; |
182 | ||
d55aa611 DM |
183 | sub compute_new_uuid { |
184 | my ($state) = @_; | |
289e4784 | 185 | |
d55aa611 DM |
186 | $uid_counter++; |
187 | return md5_base64($state . $$ . time() . $uid_counter); | |
188 | } | |
189 | ||
618fbeda DM |
190 | my $valid_service_states = { |
191 | stopped => 1, | |
192 | request_stop => 1, | |
193 | started => 1, | |
194 | fence => 1, | |
c259b1a8 | 195 | recovery => 1, |
618fbeda | 196 | migrate => 1, |
b0fdf86a | 197 | relocate => 1, |
9c7d068b | 198 | freeze => 1, |
618fbeda DM |
199 | error => 1, |
200 | }; | |
201 | ||
561e7f4b FE |
202 | # FIXME with 'static' mode and thousands of services, the overhead can be noticable and the fact |
203 | # that this function is called for each state change and upon recovery doesn't help. | |
270d4406 DM |
204 | sub recompute_online_node_usage { |
205 | my ($self) = @_; | |
206 | ||
561e7f4b | 207 | my $haenv = $self->{haenv}; |
270d4406 DM |
208 | |
209 | my $online_nodes = $self->{ns}->list_online_nodes(); | |
210 | ||
561e7f4b FE |
211 | my $online_node_usage; |
212 | ||
213 | if (my $mode = $self->{'scheduler-mode'}) { | |
214 | if ($mode eq 'static') { | |
215 | $online_node_usage = eval { | |
216 | my $scheduler = PVE::HA::Usage::Static->new($haenv); | |
217 | $scheduler->add_node($_) for $online_nodes->@*; | |
218 | return $scheduler; | |
219 | }; | |
220 | $haenv->log('warning', "using 'basic' scheduler mode, init for 'static' failed - $@") | |
221 | if $@; | |
c2d8b56a TL |
222 | } elsif ($mode eq 'basic') { |
223 | # handled below in the general fall-back case | |
224 | } else { | |
561e7f4b FE |
225 | $haenv->log('warning', "got unknown scheduler mode '$mode', using 'basic'"); |
226 | } | |
227 | } | |
228 | ||
c2d8b56a | 229 | # fallback to the basic algorithm in any case |
561e7f4b FE |
230 | if (!$online_node_usage) { |
231 | $online_node_usage = PVE::HA::Usage::Basic->new($haenv); | |
232 | $online_node_usage->add_node($_) for $online_nodes->@*; | |
233 | } | |
270d4406 DM |
234 | |
235 | foreach my $sid (keys %{$self->{ss}}) { | |
236 | my $sd = $self->{ss}->{$sid}; | |
237 | my $state = $sd->{state}; | |
6f818da1 | 238 | my $target = $sd->{target}; # optional |
5d724d4d | 239 | if ($online_node_usage->contains_node($sd->{node})) { |
c259b1a8 TL |
240 | if ( |
241 | $state eq 'started' || $state eq 'request_stop' || $state eq 'fence' || | |
242 | $state eq 'freeze' || $state eq 'error' || $state eq 'recovery' | |
243 | ) { | |
5d724d4d | 244 | $online_node_usage->add_service_usage_to_node($sd->{node}, $sid, $sd->{node}); |
270d4406 | 245 | } elsif (($state eq 'migrate') || ($state eq 'relocate')) { |
5d724d4d | 246 | my $source = $sd->{node}; |
5c2eef4b | 247 | # count it for both, source and target as load is put on both |
5d724d4d FE |
248 | $online_node_usage->add_service_usage_to_node($source, $sid, $source, $target); |
249 | $online_node_usage->add_service_usage_to_node($target, $sid, $source, $target); | |
270d4406 DM |
250 | } elsif ($state eq 'stopped') { |
251 | # do nothing | |
252 | } else { | |
feea3913 | 253 | die "should not be reached (sid = '$sid', state = '$state')"; |
270d4406 | 254 | } |
5d724d4d | 255 | } elsif (defined($target) && $online_node_usage->contains_node($target)) { |
066fd016 TL |
256 | if ($state eq 'migrate' || $state eq 'relocate') { |
257 | # to correctly track maintenance modi and also consider the target as used for the | |
258 | # case a node dies, as we cannot really know if the to-be-aborted incoming migration | |
259 | # has already cleaned up all used resources | |
5d724d4d | 260 | $online_node_usage->add_service_usage_to_node($target, $sid, $sd->{node}, $target); |
066fd016 | 261 | } |
270d4406 DM |
262 | } |
263 | } | |
264 | ||
265 | $self->{online_node_usage} = $online_node_usage; | |
266 | } | |
267 | ||
4e01bc86 DM |
268 | my $change_service_state = sub { |
269 | my ($self, $sid, $new_state, %params) = @_; | |
270 | ||
271 | my ($haenv, $ss) = ($self->{haenv}, $self->{ss}); | |
272 | ||
273 | my $sd = $ss->{$sid} || die "no such service '$sid"; | |
274 | ||
275 | my $old_state = $sd->{state}; | |
e4ffb299 | 276 | my $old_node = $sd->{node}; |
46139211 | 277 | my $old_failed_nodes = $sd->{failed_nodes}; |
2167dd1e | 278 | my $old_maintenance_node = $sd->{maintenance_node}; |
4e01bc86 DM |
279 | |
280 | die "no state change" if $old_state eq $new_state; # just to be sure | |
281 | ||
618fbeda DM |
282 | die "invalid CRM service state '$new_state'\n" if !$valid_service_states->{$new_state}; |
283 | ||
e4ffb299 DM |
284 | foreach my $k (keys %$sd) { delete $sd->{$k}; }; |
285 | ||
286 | $sd->{state} = $new_state; | |
287 | $sd->{node} = $old_node; | |
ea998b07 | 288 | $sd->{failed_nodes} = $old_failed_nodes if defined($old_failed_nodes); |
2167dd1e | 289 | $sd->{maintenance_node} = $old_maintenance_node if defined($old_maintenance_node); |
e4ffb299 DM |
290 | |
291 | my $text_state = ''; | |
ba623362 | 292 | foreach my $k (sort keys %params) { |
4e01bc86 | 293 | my $v = $params{$k}; |
e4ffb299 DM |
294 | $text_state .= ", " if $text_state; |
295 | $text_state .= "$k = $v"; | |
4e01bc86 DM |
296 | $sd->{$k} = $v; |
297 | } | |
270d4406 DM |
298 | |
299 | $self->recompute_online_node_usage(); | |
300 | ||
d55aa611 | 301 | $sd->{uid} = compute_new_uuid($new_state); |
4e01bc86 | 302 | |
24678a59 TL |
303 | $text_state = " ($text_state)" if $text_state; |
304 | $haenv->log('info', "service '$sid': state changed from '${old_state}'" . | |
305 | " to '${new_state}'$text_state"); | |
4e01bc86 DM |
306 | }; |
307 | ||
5dd3ed86 TL |
308 | # clean up a possible bad state from a recovered service to allow its start |
309 | my $fence_recovery_cleanup = sub { | |
310 | my ($self, $sid, $fenced_node) = @_; | |
311 | ||
312 | my $haenv = $self->{haenv}; | |
313 | ||
0087839a | 314 | my (undef, $type, $id) = $haenv->parse_sid($sid); |
5dd3ed86 TL |
315 | my $plugin = PVE::HA::Resources->lookup($type); |
316 | ||
317 | # should not happen | |
318 | die "unknown resource type '$type'" if !$plugin; | |
319 | ||
32ea51dd TL |
320 | # locks may block recovery, cleanup those which are safe to remove after fencing, |
321 | # i.e., after the original node was reset and thus all it's state | |
3458a0e3 TL |
322 | my $removable_locks = [ |
323 | 'backup', | |
324 | 'mounted', | |
325 | 'migrate', | |
326 | 'clone', | |
327 | 'rollback', | |
328 | 'snapshot', | |
329 | 'snapshot-delete', | |
330 | 'suspending', | |
331 | 'suspended', | |
332 | ]; | |
5dd3ed86 TL |
333 | if (my $removed_lock = $plugin->remove_locks($haenv, $id, $removable_locks, $fenced_node)) { |
334 | $haenv->log('warning', "removed leftover lock '$removed_lock' from recovered " . | |
335 | "service '$sid' to allow its start."); | |
336 | } | |
337 | }; | |
338 | ||
289e4784 | 339 | # read LRM status for all nodes |
c4a221bc | 340 | sub read_lrm_status { |
332170bd | 341 | my ($self) = @_; |
c4a221bc | 342 | |
9c7d068b | 343 | my $nodes = $self->{ns}->list_nodes(); |
c4a221bc DM |
344 | my $haenv = $self->{haenv}; |
345 | ||
9c7d068b DM |
346 | my $results = {}; |
347 | my $modes = {}; | |
332170bd | 348 | foreach my $node (@$nodes) { |
9c7d068b | 349 | my $lrm_status = $haenv->read_lrm_status($node); |
02ffd753 | 350 | $modes->{$node} = $lrm_status->{mode} || 'active'; |
9c7d068b DM |
351 | foreach my $uid (keys %{$lrm_status->{results}}) { |
352 | next if $results->{$uid}; # should not happen | |
353 | $results->{$uid} = $lrm_status->{results}->{$uid}; | |
c4a221bc DM |
354 | } |
355 | } | |
356 | ||
9c7d068b | 357 | return ($results, $modes); |
c4a221bc DM |
358 | } |
359 | ||
aa98a844 DM |
360 | # read new crm commands and save them into crm master status |
361 | sub update_crm_commands { | |
362 | my ($self) = @_; | |
363 | ||
364 | my ($haenv, $ms, $ns, $ss) = ($self->{haenv}, $self->{ms}, $self->{ns}, $self->{ss}); | |
365 | ||
366 | my $cmdlist = $haenv->read_crm_commands(); | |
bf7febe3 | 367 | |
aa98a844 DM |
368 | foreach my $cmd (split(/\n/, $cmdlist)) { |
369 | chomp $cmd; | |
370 | ||
b0fdf86a | 371 | if ($cmd =~ m/^(migrate|relocate)\s+(\S+)\s+(\S+)$/) { |
289e4784 | 372 | my ($task, $sid, $node) = ($1, $2, $3); |
aa98a844 DM |
373 | if (my $sd = $ss->{$sid}) { |
374 | if (!$ns->node_is_online($node)) { | |
375 | $haenv->log('err', "crm command error - node not online: $cmd"); | |
376 | } else { | |
377 | if ($node eq $sd->{node}) { | |
378 | $haenv->log('info', "ignore crm command - service already on target node: $cmd"); | |
289e4784 | 379 | } else { |
aa98a844 | 380 | $haenv->log('info', "got crm command: $cmd"); |
3d42b01b | 381 | $ss->{$sid}->{cmd} = [ $task, $node ]; |
aa98a844 DM |
382 | } |
383 | } | |
384 | } else { | |
385 | $haenv->log('err', "crm command error - no such service: $cmd"); | |
386 | } | |
387 | ||
21caf0db FE |
388 | } elsif ($cmd =~ m/^stop\s+(\S+)\s+(\S+)$/) { |
389 | my ($sid, $timeout) = ($1, $2); | |
390 | if (my $sd = $ss->{$sid}) { | |
391 | $haenv->log('info', "got crm command: $cmd"); | |
392 | $ss->{$sid}->{cmd} = [ 'stop', $timeout ]; | |
393 | } else { | |
394 | $haenv->log('err', "crm command error - no such service: $cmd"); | |
395 | } | |
aa98a844 DM |
396 | } else { |
397 | $haenv->log('err', "unable to parse crm command: $cmd"); | |
398 | } | |
399 | } | |
400 | ||
401 | } | |
402 | ||
8f0bb968 DM |
403 | sub manage { |
404 | my ($self) = @_; | |
c0bbd038 | 405 | |
59fd7207 | 406 | my ($haenv, $ms, $ns, $ss) = ($self->{haenv}, $self->{ms}, $self->{ns}, $self->{ss}); |
c0bbd038 | 407 | |
99278e06 TL |
408 | my ($node_info) = $haenv->get_node_info(); |
409 | my ($lrm_results, $lrm_modes) = $self->read_lrm_status(); | |
410 | ||
411 | $ns->update($node_info, $lrm_modes); | |
c79442f2 | 412 | |
99278e06 | 413 | if (!$ns->node_is_operational($haenv->nodename())) { |
e5986717 | 414 | $haenv->log('info', "master seems offline"); |
c79442f2 DM |
415 | return; |
416 | } | |
417 | ||
f7ccd1b3 DM |
418 | my $sc = $haenv->read_service_config(); |
419 | ||
abc920b4 DM |
420 | $self->{groups} = $haenv->read_group_config(); # update |
421 | ||
f7ccd1b3 DM |
422 | # compute new service status |
423 | ||
424 | # add new service | |
cc32a8f3 | 425 | foreach my $sid (sort keys %$sc) { |
f7ccd1b3 | 426 | next if $ss->{$sid}; # already there |
77499288 | 427 | my $cd = $sc->{$sid}; |
667670b2 TL |
428 | next if $cd->{state} eq 'ignored'; |
429 | ||
77499288 | 430 | $haenv->log('info', "adding new service '$sid' on node '$cd->{node}'"); |
f7ccd1b3 | 431 | # assume we are running to avoid relocate running service at add |
bb07bd2c | 432 | my $state = ($cd->{state} eq 'started') ? 'started' : 'request_stop'; |
77499288 | 433 | $ss->{$sid} = { state => $state, node => $cd->{node}, |
d55aa611 | 434 | uid => compute_new_uuid('started') }; |
f7ccd1b3 DM |
435 | } |
436 | ||
667670b2 | 437 | # remove stale or ignored services from manager state |
4e5764af | 438 | foreach my $sid (keys %$ss) { |
667670b2 TL |
439 | next if $sc->{$sid} && $sc->{$sid}->{state} ne 'ignored'; |
440 | ||
441 | my $reason = defined($sc->{$sid}) ? 'ignored state requested' : 'no config'; | |
442 | $haenv->log('info', "removing stale service '$sid' ($reason)"); | |
443 | ||
46139211 | 444 | # remove all service related state information |
4e5764af DM |
445 | delete $ss->{$sid}; |
446 | } | |
5a28da91 | 447 | |
aa98a844 DM |
448 | $self->update_crm_commands(); |
449 | ||
c79442f2 DM |
450 | for (;;) { |
451 | my $repeat = 0; | |
289e4784 | 452 | |
270d4406 | 453 | $self->recompute_online_node_usage(); |
f7ccd1b3 | 454 | |
a5e4bef4 | 455 | foreach my $sid (sort keys %$ss) { |
c79442f2 DM |
456 | my $sd = $ss->{$sid}; |
457 | my $cd = $sc->{$sid} || { state => 'disabled' }; | |
f7ccd1b3 | 458 | |
9c7d068b | 459 | my $lrm_res = $sd->{uid} ? $lrm_results->{$sd->{uid}} : undef; |
a875fbe8 | 460 | |
c79442f2 DM |
461 | my $last_state = $sd->{state}; |
462 | ||
463 | if ($last_state eq 'stopped') { | |
464 | ||
abc920b4 | 465 | $self->next_state_stopped($sid, $cd, $sd, $lrm_res); |
f7ccd1b3 | 466 | |
c79442f2 | 467 | } elsif ($last_state eq 'started') { |
f7ccd1b3 | 468 | |
abc920b4 | 469 | $self->next_state_started($sid, $cd, $sd, $lrm_res); |
f7ccd1b3 | 470 | |
b0fdf86a | 471 | } elsif ($last_state eq 'migrate' || $last_state eq 'relocate') { |
f7ccd1b3 | 472 | |
8aaa0e36 | 473 | $self->next_state_migrate_relocate($sid, $cd, $sd, $lrm_res); |
f7ccd1b3 | 474 | |
c79442f2 | 475 | } elsif ($last_state eq 'fence') { |
f7ccd1b3 | 476 | |
21e37ed4 | 477 | # do nothing here - wait until fenced |
f7ccd1b3 | 478 | |
c259b1a8 TL |
479 | } elsif ($last_state eq 'recovery') { |
480 | ||
481 | $self->next_state_recovery($sid, $cd, $sd, $lrm_res); | |
482 | ||
c79442f2 | 483 | } elsif ($last_state eq 'request_stop') { |
f7ccd1b3 | 484 | |
0df5b3dd | 485 | $self->next_state_request_stop($sid, $cd, $sd, $lrm_res); |
618fbeda | 486 | |
9c7d068b DM |
487 | } elsif ($last_state eq 'freeze') { |
488 | ||
489 | my $lrm_mode = $sd->{node} ? $lrm_modes->{$sd->{node}} : undef; | |
9c7d068b | 490 | # unfreeze |
bb07bd2c | 491 | my $state = ($cd->{state} eq 'started') ? 'started' : 'request_stop'; |
af14d5f3 | 492 | &$change_service_state($self, $sid, $state) |
02ffd753 | 493 | if $lrm_mode && $lrm_mode eq 'active'; |
9c7d068b | 494 | |
e88469ba DM |
495 | } elsif ($last_state eq 'error') { |
496 | ||
a2881965 | 497 | $self->next_state_error($sid, $cd, $sd, $lrm_res); |
e88469ba | 498 | |
a875fbe8 DM |
499 | } else { |
500 | ||
501 | die "unknown service state '$last_state'"; | |
618fbeda | 502 | } |
21e37ed4 | 503 | |
9c7d068b | 504 | my $lrm_mode = $sd->{node} ? $lrm_modes->{$sd->{node}} : undef; |
07adc6a6 DM |
505 | if ($lrm_mode && $lrm_mode eq 'restart') { |
506 | if (($sd->{state} eq 'started' || $sd->{state} eq 'stopped' || | |
507 | $sd->{state} eq 'request_stop')) { | |
508 | &$change_service_state($self, $sid, 'freeze'); | |
509 | } | |
9c7d068b | 510 | } |
07adc6a6 | 511 | |
c79442f2 | 512 | $repeat = 1 if $sd->{state} ne $last_state; |
f7ccd1b3 DM |
513 | } |
514 | ||
21e37ed4 DM |
515 | # handle fencing |
516 | my $fenced_nodes = {}; | |
9b2dbc2a | 517 | foreach my $sid (sort keys %$ss) { |
2deff1ae TL |
518 | my ($service_state, $service_node) = $ss->{$sid}->@{'state', 'node'}; |
519 | next if $service_state ne 'fence'; | |
0dcb6597 TL |
520 | |
521 | if (!defined($fenced_nodes->{$service_node})) { | |
2deff1ae | 522 | $fenced_nodes->{$service_node} = $ns->fence_node($service_node) || 0; |
21e37ed4 DM |
523 | } |
524 | ||
0dcb6597 | 525 | next if !$fenced_nodes->{$service_node}; |
21e37ed4 | 526 | |
9da84a0d | 527 | # node fence was successful - recover service |
c259b1a8 | 528 | $change_service_state->($self, $sid, 'recovery'); |
0dcb6597 | 529 | $repeat = 1; # for faster recovery execution |
21e37ed4 DM |
530 | } |
531 | ||
2deff1ae TL |
532 | # Avoid that a node without services in 'fence' state (e.g., removed |
533 | # manually by admin) is stuck with the 'fence' node state. | |
534 | for my $node (sort grep { !defined($fenced_nodes->{$_}) } keys $ns->{status}->%*) { | |
7dc92703 | 535 | next if $ns->get_node_state($node) ne 'fence'; |
7dc92703 | 536 | |
2deff1ae TL |
537 | $haenv->log('notice', "node '$node' in fence state but no services to-fence! admin interference?!"); |
538 | $repeat = 1 if $ns->fence_node($node); | |
7dc92703 FE |
539 | } |
540 | ||
c79442f2 | 541 | last if !$repeat; |
f7ccd1b3 | 542 | } |
f7ccd1b3 | 543 | |
8f0bb968 | 544 | $self->flush_master_status(); |
c0bbd038 DM |
545 | } |
546 | ||
a875fbe8 DM |
547 | # functions to compute next service states |
548 | # $cd: service configuration data (read only) | |
549 | # $sd: service status data (read only) | |
550 | # | |
551 | # Note: use change_service_state() to alter state | |
552 | # | |
553 | ||
0df5b3dd DM |
554 | sub next_state_request_stop { |
555 | my ($self, $sid, $cd, $sd, $lrm_res) = @_; | |
556 | ||
557 | my $haenv = $self->{haenv}; | |
558 | my $ns = $self->{ns}; | |
559 | ||
560 | # check result from LRM daemon | |
561 | if ($lrm_res) { | |
562 | my $exit_code = $lrm_res->{exit_code}; | |
a89ff919 | 563 | if ($exit_code == SUCCESS) { |
0df5b3dd DM |
564 | &$change_service_state($self, $sid, 'stopped'); |
565 | return; | |
566 | } else { | |
33f01524 | 567 | $haenv->log('err', "service '$sid' stop failed (exit code $exit_code)"); |
0df5b3dd DM |
568 | &$change_service_state($self, $sid, 'error'); # fixme: what state? |
569 | return; | |
570 | } | |
571 | } | |
572 | ||
ce3d7003 | 573 | if ($ns->node_is_offline_delayed($sd->{node})) { |
0df5b3dd DM |
574 | &$change_service_state($self, $sid, 'fence'); |
575 | return; | |
576 | } | |
577 | } | |
578 | ||
8aaa0e36 DM |
579 | sub next_state_migrate_relocate { |
580 | my ($self, $sid, $cd, $sd, $lrm_res) = @_; | |
581 | ||
582 | my $haenv = $self->{haenv}; | |
583 | my $ns = $self->{ns}; | |
584 | ||
585 | # check result from LRM daemon | |
586 | if ($lrm_res) { | |
587 | my $exit_code = $lrm_res->{exit_code}; | |
bb07bd2c | 588 | my $req_state = $cd->{state} eq 'started' ? 'started' : 'request_stop'; |
a89ff919 | 589 | if ($exit_code == SUCCESS) { |
542a9902 | 590 | &$change_service_state($self, $sid, $req_state, node => $sd->{target}); |
8aaa0e36 | 591 | return; |
660596ce TL |
592 | } elsif ($exit_code == EWRONG_NODE) { |
593 | $haenv->log('err', "service '$sid' - migration failed: service" . | |
594 | " registered on wrong node!"); | |
595 | &$change_service_state($self, $sid, 'error'); | |
8aaa0e36 DM |
596 | } else { |
597 | $haenv->log('err', "service '$sid' - migration failed (exit code $exit_code)"); | |
542a9902 | 598 | &$change_service_state($self, $sid, $req_state, node => $sd->{node}); |
8aaa0e36 DM |
599 | return; |
600 | } | |
601 | } | |
602 | ||
ce3d7003 | 603 | if ($ns->node_is_offline_delayed($sd->{node})) { |
8aaa0e36 DM |
604 | &$change_service_state($self, $sid, 'fence'); |
605 | return; | |
606 | } | |
607 | } | |
608 | ||
a875fbe8 | 609 | sub next_state_stopped { |
abc920b4 | 610 | my ($self, $sid, $cd, $sd, $lrm_res) = @_; |
a875fbe8 DM |
611 | |
612 | my $haenv = $self->{haenv}; | |
e88469ba | 613 | my $ns = $self->{ns}; |
a875fbe8 | 614 | |
ff6f1c5c DM |
615 | if ($sd->{node} ne $cd->{node}) { |
616 | # this can happen if we fence a node with active migrations | |
617 | # hack: modify $sd (normally this should be considered read-only) | |
24678a59 | 618 | $haenv->log('info', "fixup service '$sid' location ($sd->{node} => $cd->{node})"); |
289e4784 | 619 | $sd->{node} = $cd->{node}; |
ff6f1c5c DM |
620 | } |
621 | ||
94b7ebe2 | 622 | if ($sd->{cmd}) { |
21caf0db | 623 | my $cmd = shift @{$sd->{cmd}}; |
94b7ebe2 | 624 | |
b0fdf86a | 625 | if ($cmd eq 'migrate' || $cmd eq 'relocate') { |
21caf0db | 626 | my $target = shift @{$sd->{cmd}}; |
94b7ebe2 | 627 | if (!$ns->node_is_online($target)) { |
b0fdf86a | 628 | $haenv->log('err', "ignore service '$sid' $cmd request - node '$target' not online"); |
e88469ba | 629 | } elsif ($sd->{node} eq $target) { |
b0fdf86a | 630 | $haenv->log('info', "ignore service '$sid' $cmd request - service already on node '$target'"); |
94b7ebe2 | 631 | } else { |
9dad9c88 TL |
632 | &$change_service_state($self, $sid, $cmd, node => $sd->{node}, |
633 | target => $target); | |
9da84a0d | 634 | return; |
94b7ebe2 | 635 | } |
21caf0db FE |
636 | } elsif ($cmd eq 'stop') { |
637 | $haenv->log('info', "ignore service '$sid' $cmd request - service already stopped"); | |
94b7ebe2 | 638 | } else { |
289e4784 | 639 | $haenv->log('err', "unknown command '$cmd' for service '$sid'"); |
94b7ebe2 | 640 | } |
21caf0db | 641 | delete $sd->{cmd}; |
35cbb764 | 642 | } |
94b7ebe2 | 643 | |
a875fbe8 | 644 | if ($cd->{state} eq 'disabled') { |
35cbb764 TL |
645 | # NOTE: do nothing here, the stop state is an exception as we do not |
646 | # process the LRM result here, thus the LRM always tries to stop the | |
647 | # service (protection for the case no CRM is active) | |
e88469ba | 648 | return; |
35cbb764 | 649 | } |
e88469ba | 650 | |
84c945e4 | 651 | if ($ns->node_is_offline_delayed($sd->{node}) && $ns->get_node_state($sd->{node}) ne 'maintenance') { |
af14d5f3 TL |
652 | &$change_service_state($self, $sid, 'fence'); |
653 | return; | |
654 | } | |
655 | ||
656 | if ($cd->{state} eq 'stopped') { | |
657 | # almost the same as 'disabled' state but the service will also get recovered | |
658 | return; | |
659 | } | |
660 | ||
bb07bd2c | 661 | if ($cd->{state} eq 'started') { |
9da84a0d TL |
662 | # simply mark it started, if it's on the wrong node |
663 | # next_state_started will fix that for us | |
664 | &$change_service_state($self, $sid, 'started', node => $sd->{node}); | |
e88469ba | 665 | return; |
a875fbe8 | 666 | } |
e88469ba DM |
667 | |
668 | $haenv->log('err', "service '$sid' - unknown state '$cd->{state}' in service configuration"); | |
a875fbe8 DM |
669 | } |
670 | ||
46139211 | 671 | sub record_service_failed_on_node { |
57fe8e87 | 672 | my ($self, $sid, $node) = @_; |
46139211 | 673 | |
57fe8e87 DM |
674 | if (!defined($self->{ss}->{$sid}->{failed_nodes})) { |
675 | $self->{ss}->{$sid}->{failed_nodes} = []; | |
676 | } | |
46139211 | 677 | |
57fe8e87 | 678 | push @{$self->{ss}->{$sid}->{failed_nodes}}, $node; |
46139211 TL |
679 | } |
680 | ||
a875fbe8 | 681 | sub next_state_started { |
abc920b4 | 682 | my ($self, $sid, $cd, $sd, $lrm_res) = @_; |
a875fbe8 DM |
683 | |
684 | my $haenv = $self->{haenv}; | |
ea4443cc | 685 | my $master_status = $self->{ms}; |
a875fbe8 DM |
686 | my $ns = $self->{ns}; |
687 | ||
688 | if (!$ns->node_is_online($sd->{node})) { | |
b0e9158d | 689 | if ($ns->node_is_offline_delayed($sd->{node})) { |
5385a606 DM |
690 | &$change_service_state($self, $sid, 'fence'); |
691 | } | |
99278e06 TL |
692 | if ($ns->get_node_state($sd->{node}) ne 'maintenance') { |
693 | return; | |
2167dd1e TL |
694 | } else { |
695 | # save current node as fallback for when it comes out of | |
696 | # maintenance | |
697 | $sd->{maintenance_node} = $sd->{node}; | |
99278e06 | 698 | } |
e88469ba | 699 | } |
289e4784 | 700 | |
af14d5f3 | 701 | if ($cd->{state} eq 'disabled' || $cd->{state} eq 'stopped') { |
e88469ba DM |
702 | &$change_service_state($self, $sid, 'request_stop'); |
703 | return; | |
704 | } | |
705 | ||
bb07bd2c | 706 | if ($cd->{state} eq 'started') { |
e88469ba DM |
707 | |
708 | if ($sd->{cmd}) { | |
21caf0db | 709 | my $cmd = shift @{$sd->{cmd}}; |
e88469ba | 710 | |
b0fdf86a | 711 | if ($cmd eq 'migrate' || $cmd eq 'relocate') { |
21caf0db | 712 | my $target = shift @{$sd->{cmd}}; |
e88469ba | 713 | if (!$ns->node_is_online($target)) { |
b0fdf86a | 714 | $haenv->log('err', "ignore service '$sid' $cmd request - node '$target' not online"); |
e88469ba | 715 | } elsif ($sd->{node} eq $target) { |
b0fdf86a | 716 | $haenv->log('info', "ignore service '$sid' $cmd request - service already on node '$target'"); |
e88469ba | 717 | } else { |
a3cb8dcb | 718 | $haenv->log('info', "$cmd service '$sid' to node '$target'"); |
b0fdf86a | 719 | &$change_service_state($self, $sid, $cmd, node => $sd->{node}, target => $target); |
e88469ba | 720 | } |
21caf0db FE |
721 | } elsif ($cmd eq 'stop') { |
722 | my $timeout = shift @{$sd->{cmd}}; | |
396eb6f0 TL |
723 | if ($timeout == 0) { |
724 | $haenv->log('info', "request immediate service hard-stop for service '$sid'"); | |
725 | } else { | |
726 | $haenv->log('info', "request graceful stop with timeout '$timeout' for service '$sid'"); | |
727 | } | |
21caf0db FE |
728 | &$change_service_state($self, $sid, 'request_stop', timeout => $timeout); |
729 | $haenv->update_service_config($sid, {'state' => 'stopped'}); | |
a875fbe8 | 730 | } else { |
289e4784 | 731 | $haenv->log('err', "unknown command '$cmd' for service '$sid'"); |
a875fbe8 | 732 | } |
21caf0db FE |
733 | |
734 | delete $sd->{cmd}; | |
735 | ||
a875fbe8 | 736 | } else { |
b0fdf86a | 737 | |
abc920b4 | 738 | my $try_next = 0; |
46139211 | 739 | |
ea4443cc | 740 | if ($lrm_res) { |
46139211 | 741 | |
e9e1cd68 TL |
742 | my $ec = $lrm_res->{exit_code}; |
743 | if ($ec == SUCCESS) { | |
744 | ||
46139211 | 745 | if (defined($sd->{failed_nodes})) { |
81449997 | 746 | $haenv->log('info', "relocation policy successful for '$sid' on node '$sd->{node}'," . |
46139211 TL |
747 | " failed nodes: " . join(', ', @{$sd->{failed_nodes}}) ); |
748 | } | |
749 | ||
750 | delete $sd->{failed_nodes}; | |
e9e1cd68 | 751 | |
b47920fd DM |
752 | # store flag to indicate successful start - only valid while state == 'started' |
753 | $sd->{running} = 1; | |
754 | ||
e9e1cd68 | 755 | } elsif ($ec == ERROR) { |
b47920fd DM |
756 | |
757 | delete $sd->{running}; | |
758 | ||
e9e1cd68 | 759 | # apply our relocate policy if we got ERROR from the LRM |
46139211 | 760 | $self->record_service_failed_on_node($sid, $sd->{node}); |
ea4443cc | 761 | |
46139211 | 762 | if (scalar(@{$sd->{failed_nodes}}) <= $cd->{max_relocate}) { |
ea4443cc | 763 | |
e9e1cd68 TL |
764 | # tell select_service_node to relocate if possible |
765 | $try_next = 1; | |
ea4443cc TL |
766 | |
767 | $haenv->log('warning', "starting service $sid on node". | |
768 | " '$sd->{node}' failed, relocating service."); | |
ea4443cc TL |
769 | |
770 | } else { | |
771 | ||
46139211 TL |
772 | $haenv->log('err', "recovery policy for service $sid " . |
773 | "failed, entering error state. Failed nodes: ". | |
774 | join(', ', @{$sd->{failed_nodes}})); | |
ea4443cc TL |
775 | &$change_service_state($self, $sid, 'error'); |
776 | return; | |
777 | ||
778 | } | |
e9e1cd68 | 779 | } else { |
46139211 TL |
780 | $self->record_service_failed_on_node($sid, $sd->{node}); |
781 | ||
e9e1cd68 TL |
782 | $haenv->log('err', "service '$sid' got unrecoverable error" . |
783 | " (exit code $ec))"); | |
784 | # we have no save way out (yet) for other errors | |
785 | &$change_service_state($self, $sid, 'error'); | |
35cbb764 | 786 | return; |
ea4443cc | 787 | } |
abc920b4 DM |
788 | } |
789 | ||
2167dd1e TL |
790 | my $node = select_service_node( |
791 | $self->{groups}, | |
792 | $self->{online_node_usage}, | |
b2598576 | 793 | $sid, |
2167dd1e TL |
794 | $cd, |
795 | $sd->{node}, | |
796 | $try_next, | |
797 | $sd->{failed_nodes}, | |
798 | $sd->{maintenance_node}, | |
799 | ); | |
abc920b4 | 800 | |
b0fdf86a | 801 | if ($node && ($sd->{node} ne $node)) { |
5d724d4d | 802 | $self->{online_node_usage}->add_service_usage_to_node($node, $sid, $sd->{node}); |
2167dd1e TL |
803 | |
804 | if (defined(my $fallback = $sd->{maintenance_node})) { | |
805 | if ($node eq $fallback) { | |
806 | $haenv->log('info', "moving service '$sid' back to '$fallback', node came back from maintenance."); | |
807 | delete $sd->{maintenance_node}; | |
808 | } elsif ($sd->{node} ne $fallback) { | |
809 | $haenv->log('info', "dropping maintenance fallback node '$fallback' for '$sid'"); | |
810 | delete $sd->{maintenance_node}; | |
811 | } | |
812 | } | |
813 | ||
c0255b2c TL |
814 | if ($cd->{type} eq 'vm') { |
815 | $haenv->log('info', "migrate service '$sid' to node '$node' (running)"); | |
816 | &$change_service_state($self, $sid, 'migrate', node => $sd->{node}, target => $node); | |
817 | } else { | |
818 | $haenv->log('info', "relocate service '$sid' to node '$node'"); | |
819 | &$change_service_state($self, $sid, 'relocate', node => $sd->{node}, target => $node); | |
820 | } | |
b0fdf86a | 821 | } else { |
e6eeb7dc TL |
822 | if ($try_next && !defined($node)) { |
823 | $haenv->log('warning', "Start Error Recovery: Tried all available " . | |
824 | " nodes for service '$sid', retry start on current node. " . | |
825 | "Tried nodes: " . join(', ', @{$sd->{failed_nodes}})); | |
826 | } | |
35cbb764 | 827 | # ensure service get started again if it went unexpected down |
bf2d8d74 TL |
828 | # but ensure also no LRM result gets lost |
829 | $sd->{uid} = compute_new_uuid($sd->{state}) if defined($lrm_res); | |
b0fdf86a | 830 | } |
a875fbe8 | 831 | } |
e88469ba DM |
832 | |
833 | return; | |
35cbb764 | 834 | } |
e88469ba DM |
835 | |
836 | $haenv->log('err', "service '$sid' - unknown state '$cd->{state}' in service configuration"); | |
a875fbe8 | 837 | } |
c0bbd038 | 838 | |
a2881965 TL |
839 | sub next_state_error { |
840 | my ($self, $sid, $cd, $sd, $lrm_res) = @_; | |
841 | ||
842 | my $ns = $self->{ns}; | |
46139211 | 843 | my $ms = $self->{ms}; |
a2881965 TL |
844 | |
845 | if ($cd->{state} eq 'disabled') { | |
46139211 TL |
846 | # clean up on error recovery |
847 | delete $sd->{failed_nodes}; | |
848 | ||
a2881965 TL |
849 | &$change_service_state($self, $sid, 'stopped'); |
850 | return; | |
851 | } | |
852 | ||
a2881965 TL |
853 | } |
854 | ||
c259b1a8 TL |
855 | # after a node was fenced this recovers the service to a new node |
856 | sub next_state_recovery { | |
857 | my ($self, $sid, $cd, $sd, $lrm_res) = @_; | |
858 | ||
859 | my ($haenv, $ss) = ($self->{haenv}, $self->{ss}); | |
860 | my $ns = $self->{ns}; | |
861 | my $ms = $self->{ms}; | |
862 | ||
863 | if ($sd->{state} ne 'recovery') { # should not happen | |
864 | $haenv->log('err', "cannot recover service '$sid' from fencing, wrong state '$sd->{state}'"); | |
865 | return; | |
866 | } | |
867 | ||
868 | my $fenced_node = $sd->{node}; # for logging purpose | |
869 | ||
870 | $self->recompute_online_node_usage(); # we want the most current node state | |
871 | ||
872 | my $recovery_node = select_service_node( | |
873 | $self->{groups}, | |
874 | $self->{online_node_usage}, | |
b2598576 | 875 | $sid, |
c259b1a8 TL |
876 | $cd, |
877 | $sd->{node}, | |
878 | ); | |
879 | ||
880 | if ($recovery_node) { | |
90a24755 TL |
881 | my $msg = "recover service '$sid' from fenced node '$fenced_node' to node '$recovery_node'"; |
882 | if ($recovery_node eq $fenced_node) { | |
883 | # can happen if restriced groups and the node came up again OK | |
884 | $msg = "recover service '$sid' to previous failed and fenced node '$fenced_node' again"; | |
885 | } | |
886 | $haenv->log('info', "$msg"); | |
c259b1a8 TL |
887 | |
888 | $fence_recovery_cleanup->($self, $sid, $fenced_node); | |
889 | ||
890 | $haenv->steal_service($sid, $sd->{node}, $recovery_node); | |
5d724d4d | 891 | $self->{online_node_usage}->add_service_usage_to_node($recovery_node, $sid, $recovery_node); |
c259b1a8 TL |
892 | |
893 | # NOTE: $sd *is normally read-only*, fencing is the exception | |
894 | $cd->{node} = $sd->{node} = $recovery_node; | |
895 | my $new_state = ($cd->{state} eq 'started') ? 'started' : 'request_stop'; | |
896 | $change_service_state->($self, $sid, $new_state, node => $recovery_node); | |
897 | } else { | |
898 | # no possible node found, cannot recover - but retry later, as we always try to make it available | |
899 | $haenv->log('err', "recovering service '$sid' from fenced node '$fenced_node' failed, no recovery node found"); | |
719883e9 TL |
900 | |
901 | if ($cd->{state} eq 'disabled') { | |
902 | # allow getting a service out of recovery manually if an admin disables it. | |
903 | delete $sd->{failed_nodes}; # clean up on recovery to stopped | |
904 | $change_service_state->($self, $sid, 'stopped'); # must NOT go through request_stop | |
905 | return; | |
906 | } | |
c259b1a8 TL |
907 | } |
908 | } | |
909 | ||
c0bbd038 | 910 | 1; |