1 package PVE
::HA
::Manager
;
6 use Digest
::MD5
qw(md5_base64);
9 use PVE
::HA
::Tools
':exit_codes';
10 use PVE
::HA
::NodeStatus
;
11 use PVE
::HA
::Usage
::Basic
;
12 use PVE
::HA
::Usage
::Static
;
14 ## Variable Name & Abbreviations Convention
16 # The HA stack has some variables it uses frequently and thus abbreviates it such that it may be
17 # confusing for new readers. Here's a short list of the most common used.
19 # NOTE: variables should be assumed to be read only if not otherwise stated, only use the specific
20 # methods to re-compute/read/alter them.
22 # - $haenv -> HA environment, the main interface to the simulator/test/real world
23 # - $sid -> Service ID, unique identifier for a service, `type:vmid` is common
25 # - $ms -> Master/Manager Status, contains runtime info from the current active manager
26 # - $ns -> Node Status, hash holding online/offline status about all nodes
28 # - $ss -> Service Status, hash holding the current state (last LRM cmd result, failed starts
29 # or migrates, maintenance fallback node, for *all* services ...
30 # - $sd -> Service Data, the service status of a *single* service, iow. $ss->{$sid}
32 # - $sc -> Service Configuration, hash for all services including target state, group, ...
33 # - $cd -> Configuration Data, the service config of a *single* service, iow. $sc->{$sid}
35 # Try to avoid adding new two letter (or similar over abbreviated) names, but also don't send
36 # patches for changing above, as that set is mostly sensible and should be easy to remember once
37 # spending a bit time in the HA code base.
40 my ($this, $haenv) = @_;
42 my $class = ref($this) || $this;
44 my $self = bless { haenv
=> $haenv, crs
=> {} }, $class;
46 my $old_ms = $haenv->read_manager_status();
48 # we only copy the state part of the manager which cannot be auto generated
50 $self->{ns
} = PVE
::HA
::NodeStatus-
>new($haenv, $old_ms->{node_status
} || {});
52 # fixme: use separate class PVE::HA::ServiceStatus
53 $self->{ss
} = $old_ms->{service_status
} || {};
55 $self->{ms
} = { master_node
=> $haenv->nodename() };
57 # take over node request state to ensure a node in (manual) maintenance mode stays that way
58 # on change of active master.
59 $self->{ms
}->{node_request
} = $old_ms->{node_request
} if defined($old_ms->{node_request
});
61 $self->update_crs_scheduler_mode(); # initial set, we update it once every loop
66 sub update_crs_scheduler_mode
{
69 my $haenv = $self->{haenv
};
70 my $dc_cfg = $haenv->get_datacenter_settings();
72 $self->{crs
}->{rebalance_on_request_start
} = !!$dc_cfg->{crs
}->{'ha-rebalance-on-start'};
74 my $old_mode = $self->{crs
}->{scheduler
};
75 my $new_mode = $dc_cfg->{crs
}->{ha
} || 'basic';
77 if (!defined($old_mode)) {
78 $haenv->log('info', "using scheduler mode '$new_mode'") if $new_mode ne 'basic';
79 } elsif ($new_mode eq $old_mode) {
80 return; # nothing to do
82 $haenv->log('info', "switching scheduler mode from '$old_mode' to '$new_mode'");
85 $self->{crs
}->{scheduler
} = $new_mode;
96 sub flush_master_status
{
99 my ($haenv, $ms, $ns, $ss) = ($self->{haenv
}, $self->{ms
}, $self->{ns
}, $self->{ss
});
101 $ms->{node_status
} = $ns->{status
};
102 $ms->{service_status
} = $ss;
103 $ms->{timestamp
} = $haenv->get_time();
105 $haenv->write_manager_status($ms);
108 sub get_service_group
{
109 my ($groups, $online_node_usage, $service_conf) = @_;
112 # add all online nodes to default group to allow try_next when no group set
113 $group->{nodes
}->{$_} = 1 for $online_node_usage->list_nodes();
115 # overwrite default if service is bound to a specific group
116 if (my $group_id = $service_conf->{group
}) {
117 $group = $groups->{ids
}->{$group_id} if $groups->{ids
}->{$group_id};
123 # groups available nodes with their priority as group index
124 sub get_node_priority_groups
{
125 my ($group, $online_node_usage) = @_;
128 my $group_members = {};
129 foreach my $entry (keys %{$group->{nodes
}}) {
130 my ($node, $pri) = ($entry, 0);
131 if ($entry =~ m/^(\S+):(\d+)$/) {
132 ($node, $pri) = ($1, $2);
134 next if !$online_node_usage->contains_node($node); # offline
135 $pri_groups->{$pri}->{$node} = 1;
136 $group_members->{$node} = $pri;
139 # add non-group members to unrestricted groups (priority -1)
140 if (!$group->{restricted
}) {
142 for my $node ($online_node_usage->list_nodes()) {
143 next if defined($group_members->{$node});
144 $pri_groups->{$pri}->{$node} = 1;
145 $group_members->{$node} = -1;
149 return ($pri_groups, $group_members);
152 sub select_service_node
{
153 my ($groups, $online_node_usage, $sid, $service_conf, $current_node, $try_next, $tried_nodes, $maintenance_fallback, $best_scored) = @_;
155 my $group = get_service_group
($groups, $online_node_usage, $service_conf);
157 my ($pri_groups, $group_members) = get_node_priority_groups
($group, $online_node_usage);
159 my @pri_list = sort {$b <=> $a} keys %$pri_groups;
160 return undef if !scalar(@pri_list);
162 # stay on current node if possible (avoids random migrations)
163 if ((!$try_next && !$best_scored) && $group->{nofailback
} && defined($group_members->{$current_node})) {
164 return $current_node;
167 # select node from top priority node list
169 my $top_pri = $pri_list[0];
171 # try to avoid nodes where the service failed already if we want to relocate
173 foreach my $node (@$tried_nodes) {
174 delete $pri_groups->{$top_pri}->{$node};
178 return $maintenance_fallback
179 if defined($maintenance_fallback) && $pri_groups->{$top_pri}->{$maintenance_fallback};
181 return $current_node if (!$try_next && !$best_scored) && $pri_groups->{$top_pri}->{$current_node};
183 my $scores = $online_node_usage->score_nodes_to_start_service($sid, $current_node);
185 $scores->{$a} <=> $scores->{$b} || $a cmp $b
186 } keys %{$pri_groups->{$top_pri}};
189 for (my $i = scalar(@nodes) - 1; $i >= 0; $i--) {
190 my $node = $nodes[$i];
191 if ($node eq $current_node) {
197 if (!$best_scored && defined($found) && ($found < (scalar(@nodes) - 1))) {
198 return $nodes[$found + 1];
209 sub compute_new_uuid
{
213 return md5_base64
($state . $$ . time() . $uid_counter);
216 my $valid_service_states = {
220 request_start_balance
=> 1,
230 # FIXME with 'static' mode and thousands of services, the overhead can be noticable and the fact
231 # that this function is called for each state change and upon recovery doesn't help.
232 sub recompute_online_node_usage
{
235 my $haenv = $self->{haenv
};
237 my $online_nodes = $self->{ns
}->list_online_nodes();
239 my $online_node_usage;
241 if (my $mode = $self->{crs
}->{scheduler
}) {
242 if ($mode eq 'static') {
243 $online_node_usage = eval {
244 my $scheduler = PVE
::HA
::Usage
::Static-
>new($haenv);
245 $scheduler->add_node($_) for $online_nodes->@*;
248 $haenv->log('warning', "fallback to 'basic' scheduler mode, init for 'static' failed - $@")
250 } elsif ($mode eq 'basic') {
251 # handled below in the general fall-back case
253 $haenv->log('warning', "got unknown scheduler mode '$mode', using 'basic'");
257 # fallback to the basic algorithm in any case
258 if (!$online_node_usage) {
259 $online_node_usage = PVE
::HA
::Usage
::Basic-
>new($haenv);
260 $online_node_usage->add_node($_) for $online_nodes->@*;
263 foreach my $sid (sort keys %{$self->{ss
}}) {
264 my $sd = $self->{ss
}->{$sid};
265 my $state = $sd->{state};
266 my $target = $sd->{target
}; # optional
267 if ($online_node_usage->contains_node($sd->{node
})) {
269 $state eq 'started' || $state eq 'request_stop' || $state eq 'fence'
270 || $state eq 'freeze' || $state eq 'error' || $state eq 'recovery'
272 $online_node_usage->add_service_usage_to_node($sd->{node
}, $sid, $sd->{node
});
273 } elsif ($state eq 'migrate' || $state eq 'relocate' || $state eq 'request_start_balance') {
274 my $source = $sd->{node
};
275 # count it for both, source and target as load is put on both
276 $online_node_usage->add_service_usage_to_node($source, $sid, $source, $target)
277 if $state ne 'request_start_balance';
278 $online_node_usage->add_service_usage_to_node($target, $sid, $source, $target);
279 } elsif ($state eq 'stopped' || $state eq 'request_start') {
282 die "should not be reached (sid = '$sid', state = '$state')";
284 } elsif (defined($target) && $online_node_usage->contains_node($target)) {
285 if ($state eq 'migrate' || $state eq 'relocate') {
286 # to correctly track maintenance modi and also consider the target as used for the
287 # case a node dies, as we cannot really know if the to-be-aborted incoming migration
288 # has already cleaned up all used resources
289 $online_node_usage->add_service_usage_to_node($target, $sid, $sd->{node
}, $target);
294 $self->{online_node_usage
} = $online_node_usage;
297 my $change_service_state = sub {
298 my ($self, $sid, $new_state, %params) = @_;
300 my ($haenv, $ss) = ($self->{haenv
}, $self->{ss
});
302 my $sd = $ss->{$sid} || die "no such service '$sid";
304 my $old_state = $sd->{state};
305 my $old_node = $sd->{node
};
306 my $old_failed_nodes = $sd->{failed_nodes
};
307 my $old_maintenance_node = $sd->{maintenance_node
};
309 die "no state change" if $old_state eq $new_state; # just to be sure
311 die "invalid CRM service state '$new_state'\n" if !$valid_service_states->{$new_state};
313 foreach my $k (keys %$sd) { delete $sd->{$k}; };
315 $sd->{state} = $new_state;
316 $sd->{node
} = $old_node;
317 $sd->{failed_nodes
} = $old_failed_nodes if defined($old_failed_nodes);
318 $sd->{maintenance_node
} = $old_maintenance_node if defined($old_maintenance_node);
321 foreach my $k (sort keys %params) {
323 $text_state .= ", " if $text_state;
324 $text_state .= "$k = $v";
328 $self->recompute_online_node_usage();
330 $sd->{uid
} = compute_new_uuid
($new_state);
332 $text_state = " ($text_state)" if $text_state;
333 $haenv->log('info', "service '$sid': state changed from '${old_state}' to '${new_state}'$text_state");
336 # clean up a possible bad state from a recovered service to allow its start
337 my $fence_recovery_cleanup = sub {
338 my ($self, $sid, $fenced_node) = @_;
340 my $haenv = $self->{haenv
};
342 my (undef, $type, $id) = $haenv->parse_sid($sid);
343 my $plugin = PVE
::HA
::Resources-
>lookup($type);
346 die "unknown resource type '$type'" if !$plugin;
348 # locks may block recovery, cleanup those which are safe to remove after fencing,
349 # i.e., after the original node was reset and thus all it's state
350 my $removable_locks = [
361 if (my $removed_lock = $plugin->remove_locks($haenv, $id, $removable_locks, $fenced_node)) {
362 $haenv->log('warning', "removed leftover lock '$removed_lock' from recovered " .
363 "service '$sid' to allow its start.");
367 # read LRM status for all nodes
368 sub read_lrm_status
{
371 my $nodes = $self->{ns
}->list_nodes();
372 my $haenv = $self->{haenv
};
376 foreach my $node (@$nodes) {
377 my $lrm_status = $haenv->read_lrm_status($node);
378 $modes->{$node} = $lrm_status->{mode
} || 'active';
379 foreach my $uid (keys %{$lrm_status->{results
}}) {
380 next if $results->{$uid}; # should not happen
381 $results->{$uid} = $lrm_status->{results
}->{$uid};
385 return ($results, $modes);
388 # read new crm commands and save them into crm master status
389 sub update_crm_commands
{
392 my ($haenv, $ms, $ns, $ss) = ($self->{haenv
}, $self->{ms
}, $self->{ns
}, $self->{ss
});
394 my $cmdlist = $haenv->read_crm_commands();
396 foreach my $cmd (split(/\n/, $cmdlist)) {
399 if ($cmd =~ m/^(migrate|relocate)\s+(\S+)\s+(\S+)$/) {
400 my ($task, $sid, $node) = ($1, $2, $3);
401 if (my $sd = $ss->{$sid}) {
402 if (!$ns->node_is_online($node)) {
403 $haenv->log('err', "crm command error - node not online: $cmd");
405 if ($node eq $sd->{node
}) {
406 $haenv->log('info', "ignore crm command - service already on target node: $cmd");
408 $haenv->log('info', "got crm command: $cmd");
409 $ss->{$sid}->{cmd
} = [ $task, $node ];
413 $haenv->log('err', "crm command error - no such service: $cmd");
416 } elsif ($cmd =~ m/^stop\s+(\S+)\s+(\S+)$/) {
417 my ($sid, $timeout) = ($1, $2);
418 if (my $sd = $ss->{$sid}) {
419 $haenv->log('info', "got crm command: $cmd");
420 $ss->{$sid}->{cmd
} = [ 'stop', $timeout ];
422 $haenv->log('err', "crm command error - no such service: $cmd");
424 } elsif ($cmd =~ m/^enable-node-maintenance\s+(\S+)$/) {
427 my $state = $ns->get_node_state($node);
428 if ($state eq 'online') {
429 $ms->{node_request
}->{$node}->{maintenance
} = 1;
430 } elsif ($state eq 'maintenance') {
431 $haenv->log('info', "ignoring crm command - node $node is already in maintenance state");
433 $haenv->log('err', "crm command error - node not online: $cmd");
435 } elsif ($cmd =~ m/^disable-node-maintenance\s+(\S+)$/) {
438 my $state = $ns->get_node_state($node);
439 if ($state ne 'maintenance') {
441 'warn', "clearing maintenance of node $node requested, but it's in state $state");
443 delete $ms->{node_request
}->{$node}->{maintenance
}; # gets flushed out at the end of the CRM loop
445 $haenv->log('err', "unable to parse crm command: $cmd");
454 my ($haenv, $ms, $ns, $ss) = ($self->{haenv
}, $self->{ms
}, $self->{ns
}, $self->{ss
});
456 my ($node_info) = $haenv->get_node_info();
457 my ($lrm_results, $lrm_modes) = $self->read_lrm_status();
459 $ns->update($node_info, $lrm_modes);
461 if (!$ns->node_is_operational($haenv->nodename())) {
462 $haenv->log('info', "master seems offline");
466 $self->update_crs_scheduler_mode();
468 my $sc = $haenv->read_service_config();
470 $self->{groups
} = $haenv->read_group_config(); # update
472 # compute new service status
475 foreach my $sid (sort keys %$sc) {
476 next if $ss->{$sid}; # already there
477 my $cd = $sc->{$sid};
478 next if $cd->{state} eq 'ignored';
480 $haenv->log('info', "adding new service '$sid' on node '$cd->{node}'");
481 # assume we are running to avoid relocate running service at add
482 my $state = ($cd->{state} eq 'started') ?
'request_start' : 'request_stop';
484 state => $state, node
=> $cd->{node
}, uid
=> compute_new_uuid
('started'),
488 # remove stale or ignored services from manager state
489 foreach my $sid (keys %$ss) {
490 next if $sc->{$sid} && $sc->{$sid}->{state} ne 'ignored';
492 my $reason = defined($sc->{$sid}) ?
'ignored state requested' : 'no config';
493 $haenv->log('info', "removing stale service '$sid' ($reason)");
495 # remove all service related state information
499 $self->update_crm_commands();
504 $self->recompute_online_node_usage();
506 foreach my $sid (sort keys %$ss) {
507 my $sd = $ss->{$sid};
508 my $cd = $sc->{$sid} || { state => 'disabled' };
510 my $lrm_res = $sd->{uid
} ?
$lrm_results->{$sd->{uid
}} : undef;
512 my $last_state = $sd->{state};
514 if ($last_state eq 'stopped') {
516 $self->next_state_stopped($sid, $cd, $sd, $lrm_res);
518 } elsif ($last_state eq 'started') {
520 $self->next_state_started($sid, $cd, $sd, $lrm_res);
522 } elsif ($last_state eq 'request_start') {
524 $self->next_state_request_start($sid, $cd, $sd, $lrm_res);
526 } elsif ($last_state eq 'migrate' || $last_state eq 'relocate' || $last_state eq 'request_start_balance') {
528 $self->next_state_migrate_relocate($sid, $cd, $sd, $lrm_res);
530 } elsif ($last_state eq 'fence') {
532 # do nothing here - wait until fenced
534 } elsif ($last_state eq 'recovery') {
536 $self->next_state_recovery($sid, $cd, $sd, $lrm_res);
538 } elsif ($last_state eq 'request_stop') {
540 $self->next_state_request_stop($sid, $cd, $sd, $lrm_res);
542 } elsif ($last_state eq 'freeze') {
544 my $lrm_mode = $sd->{node
} ?
$lrm_modes->{$sd->{node
}} : undef;
545 if ($lrm_mode && $lrm_mode eq 'active') { # unfreeze if active again
546 my $state = ($cd->{state} eq 'started') ?
'started' : 'request_stop';
547 $change_service_state->($self, $sid, $state);
550 } elsif ($last_state eq 'error') {
552 $self->next_state_error($sid, $cd, $sd, $lrm_res);
556 die "unknown service state '$last_state'";
559 my $lrm_mode = $sd->{node
} ?
$lrm_modes->{$sd->{node
}} : undef;
560 if ($lrm_mode && $lrm_mode eq 'restart') {
561 my $state = $sd->{state};
562 if ($state eq 'started' || $state eq 'stopped'|| $state eq 'request_stop') {
563 $change_service_state->($self, $sid, 'freeze');
567 $repeat = 1 if $sd->{state} ne $last_state;
571 my $fenced_nodes = {};
572 foreach my $sid (sort keys %$ss) {
573 my ($service_state, $service_node) = $ss->{$sid}->@{'state', 'node'};
574 next if $service_state ne 'fence';
576 if (!defined($fenced_nodes->{$service_node})) {
577 $fenced_nodes->{$service_node} = $ns->fence_node($service_node) || 0;
580 next if !$fenced_nodes->{$service_node};
582 # node fence was successful - recover service
583 $change_service_state->($self, $sid, 'recovery');
584 $repeat = 1; # for faster recovery execution
587 # Avoid that a node without services in 'fence' state (e.g., removed
588 # manually by admin) is stuck with the 'fence' node state.
589 for my $node (sort grep { !defined($fenced_nodes->{$_}) } keys $ns->{status
}->%*) {
590 next if $ns->get_node_state($node) ne 'fence';
592 $haenv->log('notice', "node '$node' in fence state but no services to-fence! admin interference?!");
593 $repeat = 1 if $ns->fence_node($node);
599 $self->flush_master_status();
602 # functions to compute next service states
603 # $cd: service configuration data (read only)
604 # $sd: service status data (read only)
606 # Note: use change_service_state() to alter state
609 sub next_state_request_stop
{
610 my ($self, $sid, $cd, $sd, $lrm_res) = @_;
612 my $haenv = $self->{haenv
};
613 my $ns = $self->{ns
};
615 # check result from LRM daemon
617 my $exit_code = $lrm_res->{exit_code
};
618 if ($exit_code == SUCCESS
) {
619 &$change_service_state($self, $sid, 'stopped');
622 $haenv->log('err', "service '$sid' stop failed (exit code $exit_code)");
623 &$change_service_state($self, $sid, 'error'); # fixme: what state?
628 if ($ns->node_is_offline_delayed($sd->{node
})) {
629 &$change_service_state($self, $sid, 'fence');
634 sub next_state_migrate_relocate
{
635 my ($self, $sid, $cd, $sd, $lrm_res) = @_;
637 my $haenv = $self->{haenv
};
638 my $ns = $self->{ns
};
640 # check result from LRM daemon
642 my $exit_code = $lrm_res->{exit_code
};
643 my $req_state = $cd->{state} eq 'started' ?
'started' : 'request_stop';
644 if ($exit_code == SUCCESS
) {
645 &$change_service_state($self, $sid, $req_state, node
=> $sd->{target
});
647 } elsif ($exit_code == EWRONG_NODE
) {
648 $haenv->log('err', "service '$sid' - migration failed: service" .
649 " registered on wrong node!");
650 &$change_service_state($self, $sid, 'error');
651 } elsif ($exit_code == IGNORED
) {
654 "service '$sid' - rebalance-on-start request ignored - service already running",
656 $change_service_state->($self, $sid, $req_state, node
=> $sd->{node
});
658 $haenv->log('err', "service '$sid' - migration failed (exit code $exit_code)");
659 &$change_service_state($self, $sid, $req_state, node
=> $sd->{node
});
664 if ($ns->node_is_offline_delayed($sd->{node
})) {
665 &$change_service_state($self, $sid, 'fence');
670 sub next_state_stopped
{
671 my ($self, $sid, $cd, $sd, $lrm_res) = @_;
673 my $haenv = $self->{haenv
};
674 my $ns = $self->{ns
};
676 if ($sd->{node
} ne $cd->{node
}) {
677 # this can happen if we fence a node with active migrations
678 # hack: modify $sd (normally this should be considered read-only)
679 $haenv->log('info', "fixup service '$sid' location ($sd->{node} => $cd->{node})");
680 $sd->{node
} = $cd->{node
};
684 my $cmd = shift @{$sd->{cmd
}};
686 if ($cmd eq 'migrate' || $cmd eq 'relocate') {
687 my $target = shift @{$sd->{cmd
}};
688 if (!$ns->node_is_online($target)) {
689 $haenv->log('err', "ignore service '$sid' $cmd request - node '$target' not online");
690 } elsif ($sd->{node
} eq $target) {
691 $haenv->log('info', "ignore service '$sid' $cmd request - service already on node '$target'");
693 &$change_service_state($self, $sid, $cmd, node
=> $sd->{node
}, target
=> $target);
696 } elsif ($cmd eq 'stop') {
697 $haenv->log('info', "ignore service '$sid' $cmd request - service already stopped");
699 $haenv->log('err', "unknown command '$cmd' for service '$sid'");
704 if ($cd->{state} eq 'disabled') {
705 # NOTE: do nothing here, the stop state is an exception as we do not
706 # process the LRM result here, thus the LRM always tries to stop the
707 # service (protection for the case no CRM is active)
711 if ($ns->node_is_offline_delayed($sd->{node
}) && $ns->get_node_state($sd->{node
}) ne 'maintenance') {
712 &$change_service_state($self, $sid, 'fence');
716 if ($cd->{state} eq 'stopped') {
717 # almost the same as 'disabled' state but the service will also get recovered
721 if ($cd->{state} eq 'started') {
722 # simply mark it started, if it's on the wrong node next_state_started will fix that for us
723 $change_service_state->($self, $sid, 'request_start', node
=> $sd->{node
});
727 $haenv->log('err', "service '$sid' - unknown state '$cd->{state}' in service configuration");
730 sub next_state_request_start
{
731 my ($self, $sid, $cd, $sd, $lrm_res) = @_;
733 my $haenv = $self->{haenv
};
734 my $current_node = $sd->{node
};
736 if ($self->{crs
}->{rebalance_on_request_start
}) {
737 my $selected_node = select_service_node
(
739 $self->{online_node_usage
},
745 $sd->{maintenance_node
},
748 my $select_text = $selected_node ne $current_node ?
'new' : 'current';
749 $haenv->log('info', "service $sid: re-balance selected $select_text node $selected_node for startup");
751 if ($selected_node ne $current_node) {
752 $change_service_state->($self, $sid, 'request_start_balance', node
=> $current_node, target
=> $selected_node);
757 $change_service_state->($self, $sid, 'started', node
=> $current_node);
760 sub record_service_failed_on_node
{
761 my ($self, $sid, $node) = @_;
763 if (!defined($self->{ss
}->{$sid}->{failed_nodes
})) {
764 $self->{ss
}->{$sid}->{failed_nodes
} = [];
767 push @{$self->{ss
}->{$sid}->{failed_nodes
}}, $node;
770 sub next_state_started
{
771 my ($self, $sid, $cd, $sd, $lrm_res) = @_;
773 my $haenv = $self->{haenv
};
774 my $master_status = $self->{ms
};
775 my $ns = $self->{ns
};
777 if (!$ns->node_is_online($sd->{node
})) {
778 if ($ns->node_is_offline_delayed($sd->{node
})) {
779 &$change_service_state($self, $sid, 'fence');
781 if ($ns->get_node_state($sd->{node
}) ne 'maintenance') {
784 # save current node as fallback for when it comes out of maintenance
785 $sd->{maintenance_node
} = $sd->{node
};
789 if ($cd->{state} eq 'disabled' || $cd->{state} eq 'stopped') {
790 &$change_service_state($self, $sid, 'request_stop');
794 if ($cd->{state} eq 'started') {
797 my $cmd = shift @{$sd->{cmd
}};
799 if ($cmd eq 'migrate' || $cmd eq 'relocate') {
800 my $target = shift @{$sd->{cmd
}};
801 if (!$ns->node_is_online($target)) {
802 $haenv->log('err', "ignore service '$sid' $cmd request - node '$target' not online");
803 } elsif ($sd->{node
} eq $target) {
804 $haenv->log('info', "ignore service '$sid' $cmd request - service already on node '$target'");
806 $haenv->log('info', "$cmd service '$sid' to node '$target'");
807 &$change_service_state($self, $sid, $cmd, node
=> $sd->{node
}, target
=> $target);
809 } elsif ($cmd eq 'stop') {
810 my $timeout = shift @{$sd->{cmd
}};
812 $haenv->log('info', "request immediate service hard-stop for service '$sid'");
814 $haenv->log('info', "request graceful stop with timeout '$timeout' for service '$sid'");
816 &$change_service_state($self, $sid, 'request_stop', timeout
=> $timeout);
817 $haenv->update_service_config($sid, {'state' => 'stopped'});
819 $haenv->log('err', "unknown command '$cmd' for service '$sid'");
830 my $ec = $lrm_res->{exit_code
};
831 if ($ec == SUCCESS
) {
833 if (defined($sd->{failed_nodes
})) {
834 $haenv->log('info', "relocation policy successful for '$sid' on node '$sd->{node}'," .
835 " failed nodes: " . join(', ', @{$sd->{failed_nodes
}}) );
838 delete $sd->{failed_nodes
};
840 # store flag to indicate successful start - only valid while state == 'started'
843 } elsif ($ec == ERROR
|| $ec == EWRONG_NODE
) {
845 delete $sd->{running
};
847 # apply our relocate policy if we got ERROR from the LRM
848 $self->record_service_failed_on_node($sid, $sd->{node
});
850 if (scalar(@{$sd->{failed_nodes
}}) <= $cd->{max_relocate
}) {
852 # tell select_service_node to relocate if possible
855 $haenv->log('warning', "starting service $sid on node".
856 " '$sd->{node}' failed, relocating service.");
860 $haenv->log('err', "recovery policy for service $sid " .
861 "failed, entering error state. Failed nodes: ".
862 join(', ', @{$sd->{failed_nodes
}}));
863 &$change_service_state($self, $sid, 'error');
868 $self->record_service_failed_on_node($sid, $sd->{node
});
870 $haenv->log('err', "service '$sid' got unrecoverable error (exit code $ec))");
871 # we have no save way out (yet) for other errors
872 &$change_service_state($self, $sid, 'error');
877 my $node = select_service_node
(
879 $self->{online_node_usage
},
885 $sd->{maintenance_node
},
888 if ($node && ($sd->{node
} ne $node)) {
889 $self->{online_node_usage
}->add_service_usage_to_node($node, $sid, $sd->{node
});
891 if (defined(my $fallback = $sd->{maintenance_node
})) {
892 if ($node eq $fallback) {
895 "moving service '$sid' back to '$fallback', node came back from maintenance.",
897 delete $sd->{maintenance_node
};
898 } elsif ($sd->{node
} ne $fallback) {
899 $haenv->log('info', "dropping maintenance fallback node '$fallback' for '$sid'");
900 delete $sd->{maintenance_node
};
904 if ($cd->{type
} eq 'vm') {
905 $haenv->log('info', "migrate service '$sid' to node '$node' (running)");
906 &$change_service_state($self, $sid, 'migrate', node
=> $sd->{node
}, target
=> $node);
908 $haenv->log('info', "relocate service '$sid' to node '$node'");
909 &$change_service_state($self, $sid, 'relocate', node
=> $sd->{node
}, target
=> $node);
912 if ($try_next && !defined($node)) {
915 "Start Error Recovery: Tried all available nodes for service '$sid', retry"
916 ." start on current node. Tried nodes: " . join(', ', @{$sd->{failed_nodes
}},
921 if ($sd->{maintenance_node
} && $sd->{node
} eq $sd->{maintenance_node
}) {
922 my $node_state = $ns->get_node_state($sd->{node
});
923 if ($node_state eq 'online') {
924 # Having the maintenance node set here means that the service was never
925 # started on a different node since it was set. This can happen in the edge
926 # case that the whole cluster is shut down at the same time while the
927 # 'migrate' policy was configured. Node is not in maintenance mode anymore
928 # and service is started on this node, so it's fine to clear the setting.
931 "service '$sid': clearing stale maintenance node "
932 ."'$sd->{maintenance_node}' setting (is current node)",
934 delete $sd->{maintenance_node
};
938 # ensure service get started again if it went unexpected down
939 # but ensure also no LRM result gets lost
940 $sd->{uid
} = compute_new_uuid
($sd->{state}) if defined($lrm_res);
947 $haenv->log('err', "service '$sid' - unknown state '$cd->{state}' in service configuration");
950 sub next_state_error
{
951 my ($self, $sid, $cd, $sd, $lrm_res) = @_;
953 my $ns = $self->{ns
};
954 my $ms = $self->{ms
};
956 if ($cd->{state} eq 'disabled') {
957 # clean up on error recovery
958 delete $sd->{failed_nodes
};
960 &$change_service_state($self, $sid, 'stopped');
966 # after a node was fenced this recovers the service to a new node
967 sub next_state_recovery
{
968 my ($self, $sid, $cd, $sd, $lrm_res) = @_;
970 my ($haenv, $ss) = ($self->{haenv
}, $self->{ss
});
971 my $ns = $self->{ns
};
972 my $ms = $self->{ms
};
974 if ($sd->{state} ne 'recovery') { # should not happen
975 $haenv->log('err', "cannot recover service '$sid' from fencing, wrong state '$sd->{state}'");
979 my $fenced_node = $sd->{node
}; # for logging purpose
981 $self->recompute_online_node_usage(); # we want the most current node state
983 my $recovery_node = select_service_node
(
985 $self->{online_node_usage
},
991 if ($recovery_node) {
992 my $msg = "recover service '$sid' from fenced node '$fenced_node' to node '$recovery_node'";
993 if ($recovery_node eq $fenced_node) {
994 # can happen if restriced groups and the node came up again OK
995 $msg = "recover service '$sid' to previous failed and fenced node '$fenced_node' again";
997 $haenv->log('info', "$msg");
999 $fence_recovery_cleanup->($self, $sid, $fenced_node);
1001 $haenv->steal_service($sid, $sd->{node
}, $recovery_node);
1002 $self->{online_node_usage
}->add_service_usage_to_node($recovery_node, $sid, $recovery_node);
1004 # NOTE: $sd *is normally read-only*, fencing is the exception
1005 $cd->{node
} = $sd->{node
} = $recovery_node;
1006 my $new_state = ($cd->{state} eq 'started') ?
'started' : 'request_stop';
1007 $change_service_state->($self, $sid, $new_state, node
=> $recovery_node);
1009 # no possible node found, cannot recover - but retry later, as we always try to make it available
1010 $haenv->log('err', "recovering service '$sid' from fenced node '$fenced_node' failed, no recovery node found");
1012 if ($cd->{state} eq 'disabled') {
1013 # allow getting a service out of recovery manually if an admin disables it.
1014 delete $sd->{failed_nodes
}; # clean up on recovery to stopped
1015 $change_service_state->($self, $sid, 'stopped'); # must NOT go through request_stop