[pve-ha-manager.git] / src / PVE / HA / Manager.pm

package PVE::HA::Manager;

use strict;
use warnings;
use Digest::MD5 qw(md5_base64);

use Data::Dumper;

use PVE::HA::NodeStatus;

sub new {
    my ($this, $haenv) = @_;

    my $class = ref($this) || $this;

    my $ms = $haenv->read_manager_status();

    $ms->{master_node} = $haenv->nodename();

    my $ns = PVE::HA::NodeStatus->new($haenv, $ms->{node_status} || {});

    # fixme: use separate class  PVE::HA::ServiceStatus
    my $ss = $ms->{service_status} || {};

    my $self = bless {
	haenv => $haenv,
	ms => $ms, # master status
	ns => $ns, # PVE::HA::NodeStatus
	ss => $ss, # service status
    }, $class;

    return $self;
}

sub cleanup {
    my ($self) = @_;

    # todo: ?
}

sub flush_master_status {
    my ($self) = @_;

    my ($haenv, $ms, $ns, $ss) = ($self->{haenv}, $self->{ms}, $self->{ns}, $self->{ss});

    $ms->{node_status} = $ns->{status};
    $ms->{service_status} = $ss;

    $haenv->write_manager_status($ms);
} 

sub select_service_node {
    my ($groups, $online_node_usage, $service_conf, $current_node, $try_next) = @_;

    my $group = { 'nodes' => $service_conf->{node} }; # default group

    $group =  $groups->{ids}->{$service_conf->{group}} if $service_conf->{group} && 
	$groups->{ids}->{$service_conf->{group}};

    my $pri_groups = {};
    my $group_members = {};
    foreach my $entry (PVE::Tools::split_list($group->{nodes})) {
	my ($node, $pri) = ($entry, 0);
	if ($entry =~ m/^(\S+):(\d+)$/) {
	    ($node, $pri) = ($1, $2);
	}
	next if !defined($online_node_usage->{$node}); # offline
	$pri_groups->{$pri}->{$node} = 1;
	$group_members->{$node} = $pri;
    }

    
    # add non-group members to unrestricted groups (priority -1)
    if (!$group->{restricted}) {
	my $pri = -1;
	foreach my $node (keys %$online_node_usage) {
	    next if defined($group_members->{$node});
	    $pri_groups->{$pri}->{$node} = 1;
	    $group_members->{$node} = -1;
	}
    }


    my @pri_list = sort {$b <=> $a} keys %$pri_groups;
    return undef if !scalar(@pri_list);
    
    if (!$try_next && $group->{nofailback} && defined($group_members->{$current_node})) {
	return $current_node;
    }

    # select node from top priority node list

    my $top_pri = $pri_list[0];

    my @nodes = sort { $online_node_usage->{$a} <=> $online_node_usage->{$b} } keys %{$pri_groups->{$top_pri}};

    my $found;
    for (my $i = scalar(@nodes) - 1; $i >= 0; $i--) {
	my $node = $nodes[$i];
	if ($node eq $current_node) {
	    $found = $i;
	    last;
	}
    }

    if ($try_next) {

	if (defined($found) && ($found < (scalar(@nodes) - 1))) {
	    return $nodes[$found + 1];
	} else {
	    return $nodes[0];
	}

    } else {

	return $nodes[$found] if defined($found);

	return $nodes[0];

    }
}

my $uid_counter = 0;

my $valid_service_states = {
    stopped => 1,
    request_stop => 1,
    started => 1,
    fence => 1,
    migrate => 1,
    relocate => 1,
    error => 1,
};

sub recompute_online_node_usage {
    my ($self) = @_;

    my $online_node_usage = {};

    my $online_nodes = $self->{ns}->list_online_nodes();

    foreach my $node (@$online_nodes) {
	$online_node_usage->{$node} = 0;
    }

    foreach my $sid (keys %{$self->{ss}}) {
	my $sd = $self->{ss}->{$sid};
	my $state = $sd->{state};
	if (defined($online_node_usage->{$sd->{node}})) {
	    if (($state eq 'started') || ($state eq 'request_stop') || 
		($state eq 'fence') || ($state eq 'error')) {
		$online_node_usage->{$sd->{node}}++;
	    } elsif (($state eq 'migrate') || ($state eq 'relocate')) {
		$online_node_usage->{$sd->{target}}++;
	    } elsif ($state eq 'stopped') {
		# do nothing
	    } else {
		die "should not be reached";
	    }
	}
    }

    $self->{online_node_usage} = $online_node_usage;
}

my $change_service_state = sub {
    my ($self, $sid, $new_state, %params) = @_;

    my ($haenv, $ss) = ($self->{haenv}, $self->{ss});

    my $sd = $ss->{$sid} || die "no such service '$sid";

    my $old_state = $sd->{state};
    my $old_node = $sd->{node};

    die "no state change" if $old_state eq $new_state; # just to be sure

    die "invalid CRM service state '$new_state'\n" if !$valid_service_states->{$new_state};

    foreach my $k (keys %$sd) { delete $sd->{$k}; };

    $sd->{state} = $new_state;
    $sd->{node} = $old_node;

    my $text_state = '';
    foreach my $k (keys %params) {
	my $v = $params{$k};
	$text_state .= ", " if $text_state;
	$text_state .= "$k = $v";
	$sd->{$k} = $v;
    }

    $self->recompute_online_node_usage();

    $uid_counter++;
    $sd->{uid} = md5_base64($new_state . $$ . time() . $uid_counter);

    $text_state = " ($text_state)" if $text_state;
    $haenv->log('info', "service '$sid': state changed from '${old_state}' to '${new_state}' $text_state\n");
};

# read LRM status for all active nodes 
sub read_lrm_status {
    my ($self) = @_;

    my $nodes = $self->{ns}->list_online_nodes();
    my $haenv = $self->{haenv};

    my $res = {};

    foreach my $node (@$nodes) {
	my $ls = $haenv->read_lrm_status($node);
	foreach my $uid (keys %$ls) {
	    next if $res->{$uid}; # should not happen
	    $res->{$uid} = $ls->{$uid};
	}
    }

    return $res;
}

# read new crm commands and save them into crm master status
sub update_crm_commands {
    my ($self) = @_;

    my ($haenv, $ms, $ns, $ss) = ($self->{haenv}, $self->{ms}, $self->{ns}, $self->{ss});

    my $cmdlist = $haenv->read_crm_commands();
    
    foreach my $cmd (split(/\n/, $cmdlist)) {
	chomp $cmd;

	if ($cmd =~ m/^(migrate|relocate)\s+(\S+)\s+(\S+)$/) {
	    my ($task, $sid, $node) = ($1, $2, $3); 
	    if (my $sd = $ss->{$sid}) {
		if (!$ns->node_is_online($node)) {
		    $haenv->log('err', "crm command error - node not online: $cmd");
		} else {
		    if ($node eq $sd->{node}) {
			$haenv->log('info', "ignore crm command - service already on target node: $cmd");
		    } else { 
			$haenv->log('info', "got crm command: $cmd");
			$ss->{$sid}->{cmd} = [ $task, $node];
		    }
		}
	    } else {
		$haenv->log('err', "crm command error - no such service: $cmd");
	    }

	} else {
	    $haenv->log('err', "unable to parse crm command: $cmd");
	}
    }

}

sub manage {
    my ($self) = @_;

    my ($haenv, $ms, $ns, $ss) = ($self->{haenv}, $self->{ms}, $self->{ns}, $self->{ss});

    $ns->update($haenv->get_node_info());

    if (!$ns->node_is_online($haenv->nodename())) {
	$haenv->log('info', "master seems offline\n");
	return;
    }

    my $lrm_status = $self->read_lrm_status();

    my $sc = $haenv->read_service_config();

    $self->{groups} = $haenv->read_group_config(); # update

    # compute new service status

    # add new service
    foreach my $sid (keys %$sc) {
	next if $ss->{$sid}; # already there
	$haenv->log('info', "Adding new service '$sid'\n");
	# assume we are running to avoid relocate running service at add
	$ss->{$sid} = { state => 'started', node => $sc->{$sid}->{node}};
    }

    $self->update_crm_commands();

    for (;;) {
	my $repeat = 0;
	
	$self->recompute_online_node_usage();

	foreach my $sid (keys %$ss) {
	    my $sd = $ss->{$sid};
	    my $cd = $sc->{$sid} || { state => 'disabled' };

	    my $lrm_res = $sd->{uid} ? $lrm_status->{$sd->{uid}} : undef;

	    my $last_state = $sd->{state};

	    if ($last_state eq 'stopped') {

		$self->next_state_stopped($sid, $cd, $sd, $lrm_res);

	    } elsif ($last_state eq 'started') {

		$self->next_state_started($sid, $cd, $sd, $lrm_res);

	    } elsif ($last_state eq 'migrate' || $last_state eq 'relocate') {

		$self->next_state_migrate_relocate($sid, $cd, $sd, $lrm_res);

	    } elsif ($last_state eq 'fence') {

		# do nothing here - wait until fenced

	    } elsif ($last_state eq 'request_stop') {

		$self->next_state_request_stop($sid, $cd, $sd, $lrm_res);

	    } elsif ($last_state eq 'error') {

		# fixme: 

	    } else {

		die "unknown service state '$last_state'";
	    }

	    $repeat = 1 if $sd->{state} ne $last_state;
	}

	# handle fencing
	my $fenced_nodes = {};
	foreach my $sid (keys %$ss) {
	    my $sd = $ss->{$sid};
	    next if $sd->{state} ne 'fence';

	    if (!defined($fenced_nodes->{$sd->{node}})) {
		$fenced_nodes->{$sd->{node}} = $ns->fence_node($sd->{node}) || 0;
	    }

	    next if !$fenced_nodes->{$sd->{node}};

	    # node fence was sucessful - mark service as stopped
	    &$change_service_state($self, $sid, 'stopped');	    
	}

	last if !$repeat;
    }

    # remove stale services
    # fixme:

    $self->flush_master_status();
}

# functions to compute next service states
# $cd: service configuration data (read only)
# $sd: service status data (read only)
#
# Note: use change_service_state() to alter state
#

sub next_state_request_stop {
    my ($self, $sid, $cd, $sd, $lrm_res) = @_;

    my $haenv = $self->{haenv};
    my $ns = $self->{ns};

    # check result from LRM daemon
    if ($lrm_res) {
	my $exit_code = $lrm_res->{exit_code};
	if ($exit_code == 0) {
	    &$change_service_state($self, $sid, 'stopped');
	    return;
	} else {
	    &$change_service_state($self, $sid, 'error'); # fixme: what state?
	    return;
	}
    }

    if (!$ns->node_is_online($sd->{node})) {
	&$change_service_state($self, $sid, 'fence');
	return;
    }
}

sub next_state_migrate_relocate {
    my ($self, $sid, $cd, $sd, $lrm_res) = @_;

    my $haenv = $self->{haenv};
    my $ns = $self->{ns};

    # check result from LRM daemon
    if ($lrm_res) {
	my $exit_code = $lrm_res->{exit_code};
	if ($exit_code == 0) {
	    &$change_service_state($self, $sid, 'started', node => $sd->{target});
	    return;
	} else {
	    $haenv->log('err', "service '$sid' - migration failed (exit code $exit_code)");
	    &$change_service_state($self, $sid, 'started', node => $sd->{node});
	    return;
	}
    }

    if (!$ns->node_is_online($sd->{node})) {
	&$change_service_state($self, $sid, 'fence');
	return;
    }
}


sub next_state_stopped {
    my ($self, $sid, $cd, $sd, $lrm_res) = @_;

    my $haenv = $self->{haenv};
    my $ns = $self->{ns};

    if ($sd->{node} ne $cd->{node}) {
	# this can happen if we fence a node with active migrations
	# hack: modify $sd (normally this should be considered read-only)
	$haenv->log('info', "fixup service '$sid' location ($sd->{node} => $cd->{node}");
	$sd->{node} = $cd->{node}; 
    }

    if ($sd->{cmd}) {
	my ($cmd, $target) = @{$sd->{cmd}};
	delete $sd->{cmd};

	if ($cmd eq 'migrate' || $cmd eq 'relocate') {
	    if (!$ns->node_is_online($target)) {
		$haenv->log('err', "ignore service '$sid' $cmd request - node '$target' not online");
	    } elsif ($sd->{node} eq $target) {
		$haenv->log('info', "ignore service '$sid' $cmd request - service already on node '$target'");
	    } else {
		$haenv->change_service_location($sid, $target);
		$cd->{node} = $sd->{node} = $target; # fixme: $sd is read-only??!!	    
		$haenv->log('info', "$cmd service '$sid' to node '$target' (stopped)");
	    }
	} else {
	    $haenv->log('err', "unknown command '$cmd' for service '$sid'"); 
	}
    } 

    if ($cd->{state} eq 'disabled') {
	# do nothing
	return;
    } 

    if ($cd->{state} eq 'enabled') {
	if (my $node = select_service_node($self->{groups}, $self->{online_node_usage}, $cd, $sd->{node})) {
	    if ($node && ($sd->{node} ne $node)) {
		$haenv->change_service_location($sid, $node);
	    }
	    &$change_service_state($self, $sid, 'started', node => $node);
	} else {
	    # fixme: warn 
	}

	return;
    }

    $haenv->log('err', "service '$sid' - unknown state '$cd->{state}' in service configuration");
}

sub next_state_started {
    my ($self, $sid, $cd, $sd, $lrm_res) = @_;

    my $haenv = $self->{haenv};
    my $ns = $self->{ns};

    if (!$ns->node_is_online($sd->{node})) {

	&$change_service_state($self, $sid, 'fence');
	return;
    }
	
    if ($cd->{state} eq 'disabled') {
	&$change_service_state($self, $sid, 'request_stop');
	return;
    }

    if ($cd->{state} eq 'enabled') {

	if ($sd->{cmd}) {
	    my ($cmd, $target) = @{$sd->{cmd}};
	    delete $sd->{cmd};

	    if ($cmd eq 'migrate' || $cmd eq 'relocate') {
		if (!$ns->node_is_online($target)) {
		    $haenv->log('err', "ignore service '$sid' $cmd request - node '$target' not online");
		} elsif ($sd->{node} eq $target) {
		    $haenv->log('info', "ignore service '$sid' $cmd request - service already on node '$target'");
		} else {
		    $haenv->log('info', "$cmd service '$sid' to node '$target' (running)");
		    &$change_service_state($self, $sid, $cmd, node => $sd->{node}, target => $target);
		}
	    } else {
		$haenv->log('err', "unknown command '$cmd' for service '$sid'"); 
	    }
	} else {

	    my $try_next = 0;
	    if ($lrm_res && ($lrm_res->{exit_code} != 0)) { # fixme: other exit codes?
		$try_next = 1;
	    }

	    my $node = select_service_node($self->{groups}, $self->{online_node_usage}, 
					   $cd, $sd->{node}, $try_next);

	    if ($node && ($sd->{node} ne $node)) {
		$haenv->log('info', "migrate service '$sid' to node '$node' (running)");
		&$change_service_state($self, $sid, 'migrate', node => $sd->{node}, target => $node);
	    } else {
		# do nothing
	    }
	}

	return;
    } 

    $haenv->log('err', "service '$sid' - unknown state '$cd->{state}' in service configuration");
}

1;
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 DM	6
	7	use Data::Dumper;
	8
	9	use PVE::HA::NodeStatus;
	10
	11	sub new {
8f0bb968	12	my ($this, $haenv) = @_;
c0bbd038 DM	13
	14	my $class = ref($this) \|\| $this;
	15
8f0bb968 DM	16	my $ms = $haenv->read_manager_status();
	17
	18	$ms->{master_node} = $haenv->nodename();
	19
	20	my $ns = PVE::HA::NodeStatus->new($haenv, $ms->{node_status} \|\| {});
	21
59fd7207 DM	22	# fixme: use separate class PVE::HA::ServiceStatus
	23	my $ss = $ms->{service_status} \|\| {};
	24
c0bbd038	25	my $self = bless {
8f0bb968 DM	26	haenv => $haenv,
	27	ms => $ms, # master status
	28	ns => $ns, # PVE::HA::NodeStatus
59fd7207	29	ss => $ss, # service status
c0bbd038 DM	30	}, $class;
	31
	32	return $self;
	33	}
	34
d84da043 DM	35	sub cleanup {
	36	my ($self) = @_;
	37
	38	# todo: ?
	39	}
	40
8f0bb968	41	sub flush_master_status {
c0bbd038 DM	42	my ($self) = @_;
c0bbd038 DM	43
59fd7207	44	my ($haenv, $ms, $ns, $ss) = ($self->{haenv}, $self->{ms}, $self->{ns}, $self->{ss});
c0bbd038	45
8f0bb968	46	$ms->{node_status} = $ns->{status};
59fd7207 DM	47	$ms->{service_status} = $ss;
59fd7207 DM	48
8f0bb968 DM	49	$haenv->write_manager_status($ms);
8f0bb968 DM	50	}
c0bbd038	51
f7ccd1b3	52	sub select_service_node {
270d4406	53	my ($groups, $online_node_usage, $service_conf, $current_node, $try_next) = @_;
f7ccd1b3	54
abc920b4 DM	55	my $group = { 'nodes' => $service_conf->{node} }; # default group
abc920b4 DM	56
270d4406 DM	57	$group = $groups->{ids}->{$service_conf->{group}} if $service_conf->{group} &&
270d4406 DM	58	$groups->{ids}->{$service_conf->{group}};
abc920b4 DM	59
	60	my $pri_groups = {};
	61	my $group_members = {};
	62	foreach my $entry (PVE::Tools::split_list($group->{nodes})) {
	63	my ($node, $pri) = ($entry, 0);
	64	if ($entry =~ m/^(\S+):(\d+)$/) {
	65	($node, $pri) = ($1, $2);
	66	}
270d4406	67	next if !defined($online_node_usage->{$node}); # offline
abc920b4 DM	68	$pri_groups->{$pri}->{$node} = 1;
	69	$group_members->{$node} = $pri;
	70	}
f7ccd1b3	71
270d4406	72
abc920b4 DM	73	# add non-group members to unrestricted groups (priority -1)
	74	if (!$group->{restricted}) {
	75	my $pri = -1;
270d4406	76	foreach my $node (keys %$online_node_usage) {
abc920b4 DM	77	next if defined($group_members->{$node});
	78	$pri_groups->{$pri}->{$node} = 1;
	79	$group_members->{$node} = -1;
	80	}
	81	}
	82
270d4406	83
abc920b4 DM	84	my @pri_list = sort {$b <=> $a} keys %$pri_groups;
abc920b4 DM	85	return undef if !scalar(@pri_list);
270d4406	86
abc920b4 DM	87	if (!$try_next && $group->{nofailback} && defined($group_members->{$current_node})) {
	88	return $current_node;
	89	}
	90
	91	# select node from top priority node list
	92
	93	my $top_pri = $pri_list[0];
	94
270d4406	95	my @nodes = sort { $online_node_usage->{$a} <=> $online_node_usage->{$b} } keys %{$pri_groups->{$top_pri}};
abc920b4 DM	96
	97	my $found;
	98	for (my $i = scalar(@nodes) - 1; $i >= 0; $i--) {
	99	my $node = $nodes[$i];
	100	if ($node eq $current_node) {
	101	$found = $i;
	102	last;
	103	}
	104	}
	105
abc920b4 DM	106	if ($try_next) {
	107
	108	if (defined($found) && ($found < (scalar(@nodes) - 1))) {
	109	return $nodes[$found + 1];
	110	} else {
	111	return $nodes[0];
	112	}
	113
	114	} else {
	115
	116	return $nodes[$found] if defined($found);
	117
	118	return $nodes[0];
	119
	120	}
f7ccd1b3 DM	121	}
f7ccd1b3 DM	122
c4a221bc DM	123	my $uid_counter = 0;
c4a221bc DM	124
618fbeda DM	125	my $valid_service_states = {
	126	stopped => 1,
	127	request_stop => 1,
	128	started => 1,
	129	fence => 1,
	130	migrate => 1,
b0fdf86a	131	relocate => 1,
618fbeda DM	132	error => 1,
	133	};
	134
270d4406 DM	135	sub recompute_online_node_usage {
	136	my ($self) = @_;
	137
	138	my $online_node_usage = {};
	139
	140	my $online_nodes = $self->{ns}->list_online_nodes();
	141
	142	foreach my $node (@$online_nodes) {
	143	$online_node_usage->{$node} = 0;
	144	}
	145
	146	foreach my $sid (keys %{$self->{ss}}) {
	147	my $sd = $self->{ss}->{$sid};
	148	my $state = $sd->{state};
	149	if (defined($online_node_usage->{$sd->{node}})) {
	150	if (($state eq 'started') \|\| ($state eq 'request_stop') \|\|
	151	($state eq 'fence') \|\| ($state eq 'error')) {
	152	$online_node_usage->{$sd->{node}}++;
	153	} elsif (($state eq 'migrate') \|\| ($state eq 'relocate')) {
	154	$online_node_usage->{$sd->{target}}++;
	155	} elsif ($state eq 'stopped') {
	156	# do nothing
	157	} else {
	158	die "should not be reached";
	159	}
	160	}
	161	}
	162
	163	$self->{online_node_usage} = $online_node_usage;
	164	}
	165
4e01bc86 DM	166	my $change_service_state = sub {
	167	my ($self, $sid, $new_state, %params) = @_;
	168
	169	my ($haenv, $ss) = ($self->{haenv}, $self->{ss});
	170
	171	my $sd = $ss->{$sid} \|\| die "no such service '$sid";
	172
	173	my $old_state = $sd->{state};
e4ffb299	174	my $old_node = $sd->{node};
4e01bc86 DM	175
	176	die "no state change" if $old_state eq $new_state; # just to be sure
	177
618fbeda DM	178	die "invalid CRM service state '$new_state'\n" if !$valid_service_states->{$new_state};
618fbeda DM	179
e4ffb299 DM	180	foreach my $k (keys %$sd) { delete $sd->{$k}; };
	181
	182	$sd->{state} = $new_state;
	183	$sd->{node} = $old_node;
	184
	185	my $text_state = '';
4e01bc86 DM	186	foreach my $k (keys %params) {
4e01bc86 DM	187	my $v = $params{$k};
e4ffb299 DM	188	$text_state .= ", " if $text_state;
e4ffb299 DM	189	$text_state .= "$k = $v";
4e01bc86 DM	190	$sd->{$k} = $v;
4e01bc86 DM	191	}
270d4406 DM	192
	193	$self->recompute_online_node_usage();
	194
c4a221bc DM	195	$uid_counter++;
c4a221bc DM	196	$sd->{uid} = md5_base64($new_state . $$ . time() . $uid_counter);
4e01bc86	197
e4ffb299 DM	198	$text_state = " ($text_state)" if $text_state;
e4ffb299 DM	199	$haenv->log('info', "service '$sid': state changed from '${old_state}' to '${new_state}' $text_state\n");
4e01bc86 DM	200	};
4e01bc86 DM	201
332170bd	202	# read LRM status for all active nodes
c4a221bc	203	sub read_lrm_status {
332170bd	204	my ($self) = @_;
c4a221bc	205
332170bd	206	my $nodes = $self->{ns}->list_online_nodes();
c4a221bc DM	207	my $haenv = $self->{haenv};
	208
	209	my $res = {};
	210
332170bd	211	foreach my $node (@$nodes) {
c4a221bc DM	212	my $ls = $haenv->read_lrm_status($node);
	213	foreach my $uid (keys %$ls) {
	214	next if $res->{$uid}; # should not happen
	215	$res->{$uid} = $ls->{$uid};
	216	}
	217	}
	218
	219	return $res;
	220	}
	221
aa98a844 DM	222	# read new crm commands and save them into crm master status
	223	sub update_crm_commands {
	224	my ($self) = @_;
	225
	226	my ($haenv, $ms, $ns, $ss) = ($self->{haenv}, $self->{ms}, $self->{ns}, $self->{ss});
	227
	228	my $cmdlist = $haenv->read_crm_commands();
	229
	230	foreach my $cmd (split(/\n/, $cmdlist)) {
	231	chomp $cmd;
	232
b0fdf86a DM	233	if ($cmd =~ m/^(migrate\|relocate)\s+(\S+)\s+(\S+)$/) {
b0fdf86a DM	234	my ($task, $sid, $node) = ($1, $2, $3);
aa98a844 DM	235	if (my $sd = $ss->{$sid}) {
	236	if (!$ns->node_is_online($node)) {
	237	$haenv->log('err', "crm command error - node not online: $cmd");
	238	} else {
	239	if ($node eq $sd->{node}) {
	240	$haenv->log('info', "ignore crm command - service already on target node: $cmd");
	241	} else {
	242	$haenv->log('info', "got crm command: $cmd");
b0fdf86a	243	$ss->{$sid}->{cmd} = [ $task, $node];
aa98a844 DM	244	}
	245	}
	246	} else {
	247	$haenv->log('err', "crm command error - no such service: $cmd");
	248	}
	249
	250	} else {
	251	$haenv->log('err', "unable to parse crm command: $cmd");
	252	}
	253	}
	254
	255	}
	256
8f0bb968 DM	257	sub manage {
8f0bb968 DM	258	my ($self) = @_;
c0bbd038	259
59fd7207	260	my ($haenv, $ms, $ns, $ss) = ($self->{haenv}, $self->{ms}, $self->{ns}, $self->{ss});
c0bbd038	261
332170bd	262	$ns->update($haenv->get_node_info());
c79442f2 DM	263
	264	if (!$ns->node_is_online($haenv->nodename())) {
	265	$haenv->log('info', "master seems offline\n");
	266	return;
	267	}
	268
332170bd	269	my $lrm_status = $self->read_lrm_status();
c4a221bc	270
f7ccd1b3 DM	271	my $sc = $haenv->read_service_config();
f7ccd1b3 DM	272
abc920b4 DM	273	$self->{groups} = $haenv->read_group_config(); # update
abc920b4 DM	274
f7ccd1b3 DM	275	# compute new service status
	276
	277	# add new service
	278	foreach my $sid (keys %$sc) {
	279	next if $ss->{$sid}; # already there
	280	$haenv->log('info', "Adding new service '$sid'\n");
	281	# assume we are running to avoid relocate running service at add
8456bde2	282	$ss->{$sid} = { state => 'started', node => $sc->{$sid}->{node}};
f7ccd1b3 DM	283	}
f7ccd1b3 DM	284
aa98a844 DM	285	$self->update_crm_commands();
aa98a844 DM	286
c79442f2 DM	287	for (;;) {
c79442f2 DM	288	my $repeat = 0;
270d4406 DM	289
270d4406 DM	290	$self->recompute_online_node_usage();
f7ccd1b3	291
c79442f2 DM	292	foreach my $sid (keys %$ss) {
	293	my $sd = $ss->{$sid};
	294	my $cd = $sc->{$sid} \|\| { state => 'disabled' };
f7ccd1b3	295
a875fbe8 DM	296	my $lrm_res = $sd->{uid} ? $lrm_status->{$sd->{uid}} : undef;
a875fbe8 DM	297
c79442f2 DM	298	my $last_state = $sd->{state};
	299
	300	if ($last_state eq 'stopped') {
	301
abc920b4	302	$self->next_state_stopped($sid, $cd, $sd, $lrm_res);
f7ccd1b3	303
c79442f2	304	} elsif ($last_state eq 'started') {
f7ccd1b3	305
abc920b4	306	$self->next_state_started($sid, $cd, $sd, $lrm_res);
f7ccd1b3	307
b0fdf86a	308	} elsif ($last_state eq 'migrate' \|\| $last_state eq 'relocate') {
f7ccd1b3	309
8aaa0e36	310	$self->next_state_migrate_relocate($sid, $cd, $sd, $lrm_res);
f7ccd1b3	311
c79442f2	312	} elsif ($last_state eq 'fence') {
f7ccd1b3	313
21e37ed4	314	# do nothing here - wait until fenced
f7ccd1b3	315
c79442f2	316	} elsif ($last_state eq 'request_stop') {
f7ccd1b3	317
0df5b3dd	318	$self->next_state_request_stop($sid, $cd, $sd, $lrm_res);
618fbeda	319
e88469ba DM	320	} elsif ($last_state eq 'error') {
	321
	322	# fixme:
	323
a875fbe8 DM	324	} else {
	325
	326	die "unknown service state '$last_state'";
618fbeda	327	}
21e37ed4	328
c79442f2	329	$repeat = 1 if $sd->{state} ne $last_state;
f7ccd1b3 DM	330	}
f7ccd1b3 DM	331
21e37ed4 DM	332	# handle fencing
	333	my $fenced_nodes = {};
	334	foreach my $sid (keys %$ss) {
	335	my $sd = $ss->{$sid};
	336	next if $sd->{state} ne 'fence';
	337
	338	if (!defined($fenced_nodes->{$sd->{node}})) {
	339	$fenced_nodes->{$sd->{node}} = $ns->fence_node($sd->{node}) \|\| 0;
	340	}
	341
	342	next if !$fenced_nodes->{$sd->{node}};
	343
	344	# node fence was sucessful - mark service as stopped
	345	&$change_service_state($self, $sid, 'stopped');
	346	}
	347
c79442f2	348	last if !$repeat;
f7ccd1b3	349	}
f7ccd1b3 DM	350
	351	# remove stale services
	352	# fixme:
	353
8f0bb968	354	$self->flush_master_status();
c0bbd038 DM	355	}
c0bbd038 DM	356
a875fbe8 DM	357	# functions to compute next service states
	358	# $cd: service configuration data (read only)
	359	# $sd: service status data (read only)
	360	#
	361	# Note: use change_service_state() to alter state
	362	#
	363
0df5b3dd DM	364	sub next_state_request_stop {
	365	my ($self, $sid, $cd, $sd, $lrm_res) = @_;
	366
	367	my $haenv = $self->{haenv};
	368	my $ns = $self->{ns};
	369
	370	# check result from LRM daemon
	371	if ($lrm_res) {
	372	my $exit_code = $lrm_res->{exit_code};
	373	if ($exit_code == 0) {
	374	&$change_service_state($self, $sid, 'stopped');
	375	return;
	376	} else {
	377	&$change_service_state($self, $sid, 'error'); # fixme: what state?
	378	return;
	379	}
	380	}
	381
	382	if (!$ns->node_is_online($sd->{node})) {
	383	&$change_service_state($self, $sid, 'fence');
	384	return;
	385	}
	386	}
	387
8aaa0e36 DM	388	sub next_state_migrate_relocate {
	389	my ($self, $sid, $cd, $sd, $lrm_res) = @_;
	390
	391	my $haenv = $self->{haenv};
	392	my $ns = $self->{ns};
	393
	394	# check result from LRM daemon
	395	if ($lrm_res) {
	396	my $exit_code = $lrm_res->{exit_code};
	397	if ($exit_code == 0) {
	398	&$change_service_state($self, $sid, 'started', node => $sd->{target});
	399	return;
	400	} else {
	401	$haenv->log('err', "service '$sid' - migration failed (exit code $exit_code)");
	402	&$change_service_state($self, $sid, 'started', node => $sd->{node});
	403	return;
	404	}
	405	}
	406
	407	if (!$ns->node_is_online($sd->{node})) {
	408	&$change_service_state($self, $sid, 'fence');
	409	return;
	410	}
	411	}
	412
	413
a875fbe8	414	sub next_state_stopped {
abc920b4	415	my ($self, $sid, $cd, $sd, $lrm_res) = @_;
a875fbe8 DM	416
a875fbe8 DM	417	my $haenv = $self->{haenv};
e88469ba	418	my $ns = $self->{ns};
a875fbe8	419
ff6f1c5c DM	420	if ($sd->{node} ne $cd->{node}) {
	421	# this can happen if we fence a node with active migrations
	422	# hack: modify $sd (normally this should be considered read-only)
	423	$haenv->log('info', "fixup service '$sid' location ($sd->{node} => $cd->{node}");
	424	$sd->{node} = $cd->{node};
	425	}
	426
94b7ebe2 DM	427	if ($sd->{cmd}) {
	428	my ($cmd, $target) = @{$sd->{cmd}};
	429	delete $sd->{cmd};
	430
b0fdf86a	431	if ($cmd eq 'migrate' \|\| $cmd eq 'relocate') {
94b7ebe2	432	if (!$ns->node_is_online($target)) {
b0fdf86a	433	$haenv->log('err', "ignore service '$sid' $cmd request - node '$target' not online");
e88469ba	434	} elsif ($sd->{node} eq $target) {
b0fdf86a	435	$haenv->log('info', "ignore service '$sid' $cmd request - service already on node '$target'");
94b7ebe2 DM	436	} else {
	437	$haenv->change_service_location($sid, $target);
	438	$cd->{node} = $sd->{node} = $target; # fixme: $sd is read-only??!!
b0fdf86a	439	$haenv->log('info', "$cmd service '$sid' to node '$target' (stopped)");
94b7ebe2 DM	440	}
	441	} else {
	442	$haenv->log('err', "unknown command '$cmd' for service '$sid'");
	443	}
	444	}
	445
a875fbe8 DM	446	if ($cd->{state} eq 'disabled') {
a875fbe8 DM	447	# do nothing
e88469ba DM	448	return;
	449	}
	450
	451	if ($cd->{state} eq 'enabled') {
270d4406	452	if (my $node = select_service_node($self->{groups}, $self->{online_node_usage}, $cd, $sd->{node})) {
a875fbe8 DM	453	if ($node && ($sd->{node} ne $node)) {
	454	$haenv->change_service_location($sid, $node);
	455	}
	456	&$change_service_state($self, $sid, 'started', node => $node);
	457	} else {
	458	# fixme: warn
	459	}
e88469ba DM	460
e88469ba DM	461	return;
a875fbe8	462	}
e88469ba DM	463
e88469ba DM	464	$haenv->log('err', "service '$sid' - unknown state '$cd->{state}' in service configuration");
a875fbe8 DM	465	}
	466
	467	sub next_state_started {
abc920b4	468	my ($self, $sid, $cd, $sd, $lrm_res) = @_;
a875fbe8 DM	469
	470	my $haenv = $self->{haenv};
	471	my $ns = $self->{ns};
	472
	473	if (!$ns->node_is_online($sd->{node})) {
	474
	475	&$change_service_state($self, $sid, 'fence');
e88469ba DM	476	return;
e88469ba DM	477	}
a875fbe8	478
e88469ba DM	479	if ($cd->{state} eq 'disabled') {
	480	&$change_service_state($self, $sid, 'request_stop');
	481	return;
	482	}
	483
	484	if ($cd->{state} eq 'enabled') {
e88469ba DM	485
	486	if ($sd->{cmd}) {
	487	my ($cmd, $target) = @{$sd->{cmd}};
	488	delete $sd->{cmd};
	489
b0fdf86a	490	if ($cmd eq 'migrate' \|\| $cmd eq 'relocate') {
e88469ba	491	if (!$ns->node_is_online($target)) {
b0fdf86a	492	$haenv->log('err', "ignore service '$sid' $cmd request - node '$target' not online");
e88469ba	493	} elsif ($sd->{node} eq $target) {
b0fdf86a	494	$haenv->log('info', "ignore service '$sid' $cmd request - service already on node '$target'");
e88469ba	495	} else {
b0fdf86a DM	496	$haenv->log('info', "$cmd service '$sid' to node '$target' (running)");
b0fdf86a DM	497	&$change_service_state($self, $sid, $cmd, node => $sd->{node}, target => $target);
e88469ba	498	}
a875fbe8	499	} else {
e88469ba	500	$haenv->log('err', "unknown command '$cmd' for service '$sid'");
a875fbe8 DM	501	}
a875fbe8 DM	502	} else {
b0fdf86a	503
abc920b4 DM	504	my $try_next = 0;
	505	if ($lrm_res && ($lrm_res->{exit_code} != 0)) { # fixme: other exit codes?
	506	$try_next = 1;
	507	}
	508
270d4406 DM	509	my $node = select_service_node($self->{groups}, $self->{online_node_usage},
270d4406 DM	510	$cd, $sd->{node}, $try_next);
abc920b4	511
b0fdf86a DM	512	if ($node && ($sd->{node} ne $node)) {
	513	$haenv->log('info', "migrate service '$sid' to node '$node' (running)");
	514	&$change_service_state($self, $sid, 'migrate', node => $sd->{node}, target => $node);
	515	} else {
	516	# do nothing
	517	}
a875fbe8	518	}
e88469ba DM	519
	520	return;
	521	}
	522
	523	$haenv->log('err', "service '$sid' - unknown state '$cd->{state}' in service configuration");
a875fbe8	524	}
c0bbd038 DM	525
c0bbd038 DM	526	1;