155 lines
5.5 KiB
Perl
155 lines
5.5 KiB
Perl
#
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# Copyright 2020 Centreon (http://www.centreon.com/)
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#
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# Centreon is a full-fledged industry-strength solution that meets
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# the needs in IT infrastructure and application monitoring for
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# service performance.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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package database::postgres::mode::backends;
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use base qw(centreon::plugins::mode);
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use strict;
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use warnings;
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sub new {
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my ($class, %options) = @_;
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my $self = $class->SUPER::new(package => __PACKAGE__, %options);
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bless $self, $class;
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$options{options}->add_options(arguments =>
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{
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"warning:s" => { name => 'warning', },
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"critical:s" => { name => 'critical', },
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"exclude:s" => { name => 'exclude', },
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"noidle" => { name => 'noidle', },
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});
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return $self;
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}
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sub check_options {
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my ($self, %options) = @_;
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$self->SUPER::init(%options);
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if (($self->{perfdata}->threshold_validate(label => 'warning', value => $self->{option_results}->{warning})) == 0) {
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$self->{output}->add_option_msg(short_msg => "Wrong warning threshold '" . $self->{option_results}->{warning} . "'.");
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$self->{output}->option_exit();
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}
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if (($self->{perfdata}->threshold_validate(label => 'critical', value => $self->{option_results}->{critical})) == 0) {
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$self->{output}->add_option_msg(short_msg => "Wrong critical threshold '" . $self->{option_results}->{critical} . "'.");
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$self->{output}->option_exit();
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}
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}
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sub run {
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my ($self, %options) = @_;
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# $options{sql} = sqlmode object
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$self->{sql} = $options{sql};
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$self->{sql}->connect();
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my $noidle = '';
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if (defined($self->{option_results}->{noidle})) {
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if ($self->{sql}->is_version_minimum(version => '9.2')) {
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$noidle = " AND state <> 'idle'";
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} else {
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$noidle = " AND current_query <> '<IDLE>'";
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}
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}
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my $query = "SELECT COUNT(datid) AS current,
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(SELECT setting AS mc FROM pg_settings WHERE name = 'max_connections') AS mc,
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d.datname
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FROM pg_database d
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LEFT JOIN pg_stat_activity s ON (s.datid = d.oid $noidle)
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GROUP BY d.datname
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ORDER BY d.datname";
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$self->{sql}->query(query => $query);
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$self->{output}->output_add(severity => 'OK',
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short_msg => "All client database connections are ok.");
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my $database_check = 0;
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my $result = $self->{sql}->fetchall_arrayref();
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foreach my $row (@{$result}) {
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if (defined($self->{option_results}->{exclude}) && $$row[2] !~ /$self->{option_results}->{exclude}/) {
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$self->{output}->output_add(long_msg => "Skipping database '" . $$row[2] . '"');
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next;
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}
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$database_check++;
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my $used = $$row[0];
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my $max_connections = $$row[1];
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my $database_name = $$row[2];
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my $prct_used = ($used * 100) / $max_connections;
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my $exit_code = $self->{perfdata}->threshold_check(value => $prct_used, threshold => [ { label => 'critical', 'exit_litteral' => 'critical' }, { label => 'warning', exit_litteral => 'warning' } ]);
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$self->{output}->output_add(long_msg => sprintf("Database '%s': %.2f%% client connections limit reached (%d of max. %d)",
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$database_name, $prct_used, $used, $max_connections));
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if (!$self->{output}->is_status(value => $exit_code, compare => 'ok', litteral => 1)) {
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$self->{output}->output_add(severity => $exit_code,
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short_msg => sprintf("Database '%s': %.2f%% client connections limit reached (%d of max. %d)",
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$database_name, $prct_used, $used, $max_connections));
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}
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$self->{output}->perfdata_add(label => 'connections_' . $database_name,
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value => $used,
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warning => $self->{perfdata}->get_perfdata_for_output(label => 'warning', total => $max_connections, cast_int => 1),
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critical => $self->{perfdata}->get_perfdata_for_output(label => 'critical', total => $max_connections, cast_int => 1),
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min => 0, max => $max_connections);
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}
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if ($database_check == 0) {
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$self->{output}->output_add(severity => 'UNKNOWN',
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short_msg => 'No database checked. (permission or a wrong exclude filter)');
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}
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$self->{output}->display();
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$self->{output}->exit();
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}
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1;
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__END__
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=head1 MODE
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Check the current number of connections for one or more databases
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=over 8
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=item B<--warning>
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Threshold warning in percent.
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=item B<--critical>
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Threshold critical in percent.
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=item B<--exclude>
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Filter databases.
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=item B<--noidle>
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Idle connections are not counted.
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=back
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=cut
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