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centreon-plugins/database/mysql/mode/replicationmasterslave.pm

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#
# Copyright 2017 Centreon (http://www.centreon.com/)
#
# Centreon is a full-fledged industry-strength solution that meets
# the needs in IT infrastructure and application monitoring for
# service performance.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
package database::mysql::mode::replicationmasterslave;
use base qw(centreon::plugins::mode);
use strict;
use warnings;
sub new {
my ($class, %options) = @_;
my $self = $class->SUPER::new(package => __PACKAGE__, %options);
bless $self, $class;
$self->{version} = '1.0';
$options{options}->add_options(arguments =>
{
"warning:s" => { name => 'warning', },
"critical:s" => { name => 'critical', },
});
return $self;
}
sub check_options {
my ($self, %options) = @_;
$self->SUPER::init(%options);
if (($self->{perfdata}->threshold_validate(label => 'warning', value => $self->{option_results}->{warning})) == 0) {
$self->{output}->add_option_msg(short_msg => "Wrong warning threshold '" . $self->{option_results}->{warning} . "'.");
$self->{output}->option_exit();
}
if (($self->{perfdata}->threshold_validate(label => 'critical', value => $self->{option_results}->{critical})) == 0) {
$self->{output}->add_option_msg(short_msg => "Wrong critical threshold '" . $self->{option_results}->{critical} . "'.");
$self->{output}->option_exit();
}
}
sub run {
my ($self, %options) = @_;
if (ref($options{sql}) ne 'ARRAY') {
$self->{output}->add_option_msg(short_msg => "Need to use --multiple options.");
$self->{output}->option_exit();
}
if (scalar(@{$options{sql}}) < 2) {
$self->{output}->add_option_msg(short_msg => "Need to specify two MySQL Server.");
$self->{output}->option_exit();
}
my ($sql_one, $sql_two) = @{$options{sql}};
my ($slave_status, $slave_status_error) = (0, "");
my ($position_status, $position_status_error) = (0, "");
my ($connection_status_name_srv1, $connection_status_name_srv2) = ($sql_one->get_id(), $sql_two->get_id());
my ($master_save, $slave_save);
my ($exit1, $msg_error1) = $sql_one->connect(dontquit => 1);
my ($exit2, $msg_error2) = $sql_two->connect(dontquit => 1);
$self->{output}->output_add(severity => 'OK',
short_msg => "No problems. Replication is ok.");
if ($exit1 == -1) {
$self->{output}->output_add(severity => 'CRITICAL',
short_msg => "Connection Status '" . $sql_one->get_id() . "': " . $msg_error1);
} else {
$self->{output}->output_add(long_msg => "Connection Status '" . $sql_one->get_id() . "' [OK]");
}
if ($exit2 == -1) {
$self->{output}->output_add(severity => 'CRITICAL',
short_msg => "Connection Status '" . $sql_two->get_id() . "': " . $msg_error2);
} else {
$self->{output}->output_add(long_msg => "Connection Status '" . $sql_two->get_id() . "' [OK]");
}
#####
# Find SLAVE
#####
my ($total_srv1, $total_srv2);
my ($last_error1, $last_error2);
my ($io_thread_status_srv1, $sql_thread_status_srv1);
if ($exit1 != -1) {
$sql_one->query(query => q{
SHOW SLAVE STATUS
});
my $result = $sql_one->fetchrow_hashref();
my $slave_io_running = $result->{Slave_IO_Running};
my $slave_sql_running = $result->{Slave_SQL_Running};
$last_error1 = $result->{Last_Error};
if (defined($slave_io_running) && $slave_io_running =~ /^yes$/i) {
$io_thread_status_srv1 = 0;
} else {
$io_thread_status_srv1 = 1;
}
if (defined($slave_sql_running) && $slave_sql_running =~ /^yes$/i) {
$sql_thread_status_srv1 = 0;
} else {
$sql_thread_status_srv1 = 1;
}
} else {
$io_thread_status_srv1 = 100;
$sql_thread_status_srv1 = 100;
}
my ($io_thread_status_srv2, $sql_thread_status_srv2);
if ($exit2 != -1) {
$sql_two->query(query => q{
SHOW SLAVE STATUS
});
my $result = $sql_two->fetchrow_hashref();
my $slave_io_running = $result->{Slave_IO_Running};
my $slave_sql_running = $result->{Slave_SQL_Running};
$last_error2 = $result->{Last_Error};
if (defined($slave_io_running) && $slave_io_running =~ /^yes$/i) {
$io_thread_status_srv2 = 0;
} else {
$io_thread_status_srv2 = 1;
}
if (defined($slave_sql_running) && $slave_sql_running =~ /^yes$/i) {
$sql_thread_status_srv2 = 0;
} else {
$sql_thread_status_srv2 = 1;
}
} else {
$io_thread_status_srv2 = 100;
$sql_thread_status_srv2 = 100;
}
$total_srv1 = $io_thread_status_srv1 + $sql_thread_status_srv1;
$total_srv2 = $io_thread_status_srv2 + $sql_thread_status_srv2;
# Check If there is two slave
if ($total_srv1 < 2 && $total_srv2 < 2) {
$slave_status = 1;
$slave_status_error = "Two slave. Need to have only one.";
} else {
# Check if a thread is down
if ($total_srv1 == 1) {
$slave_status = -1;
$slave_status_error = "A Replication thread is down on '" . $sql_one->get_id() . "'.";
if ($sql_thread_status_srv1 != 0) {
if (defined($last_error1) && $last_error1 ne "") {
$slave_status = 1;
$slave_status_error .= " SQL Thread is stopped because of an error (error='" . $last_error1 . "').";
}
}
}
if ($total_srv2 == 1) {
$slave_status = -1;
$slave_status_error = "A Replication thread is down on '" . $sql_two->get_id() . "'.";
if ($sql_thread_status_srv2 != 0) {
if (defined($last_error2) && $last_error2 ne "") {
$slave_status = 1;
$slave_status_error .= " SQL Thread is stopped because of an error (error='" . $last_error2 . "').";
}
}
}
# Check if we need to SKIP
if ($io_thread_status_srv1 == 100) {
$slave_status = -1;
$slave_status_error .= " Skip check on '" . $sql_one->get_id() . "'.";
}
if ($io_thread_status_srv2 == 100) {
$slave_status = -1;
$slave_status_error .= " Skip check on '" . $sql_two->get_id() . "'.";
}
# Save Slave
if ($total_srv1 < 2) {
$slave_save = $sql_one;
$master_save = $sql_two;
}
if ($total_srv2 < 2) {
$slave_save = $sql_two;
$master_save = $sql_one;
}
if ($total_srv2 > 1 && $total_srv1 > 1) {
$slave_status = 1;
$slave_status_error .= " No slave (maybe because we cannot check a server).";
}
}
####
# Check Slave position
####
if (!defined($slave_save)) {
$position_status = -2;
$position_status_error = "Skip because we can't identify a unique slave.";
} else {
if ($master_save->get_id() eq $connection_status_name_srv1 && $exit1 == -1) {
$position_status = -1;
$position_status_error = "Can't get master position on '" . $master_save->get_id() . "'.";
} elsif ($master_save->get_id() eq $connection_status_name_srv2 && $exit2 == -1) {
$position_status = -1;
$position_status_error = "Can't get master position on '" . $master_save->get_id() . "'.";
} else {
# Get Master Position
$master_save->query(query => q{
SHOW MASTER STATUS
});
my $result = $master_save->fetchrow_hashref();
my $master_file = $result->{File};
my $master_position = $result->{Position};
$slave_save->query(query => q{
SHOW SLAVE STATUS
});
my $result2 = $slave_save->fetchrow_hashref();
my $slave_file = $result2->{Master_Log_File}; # 'Master_Log_File'
my $slave_position = $result2->{Read_Master_Log_Pos}; # 'Read_Master_Log_Pos'
my $num_sec_lates = $result2->{Seconds_Behind_Master};
my $exit_code_sec = $self->{perfdata}->threshold_check(value => $num_sec_lates, threshold => [ { label => 'critical', exit_litteral => 'critical' }, { label => 'warning', exit_litteral => 'warning' } ]);
if (!$self->{output}->is_status(value => $exit_code_sec, compare => 'ok', litteral => 1)) {
$self->{output}->output_add(severity => $exit_code_sec,
short_msg => sprintf("Slave has %d seconds latency behind master", $num_sec_lates));
}
$self->{output}->perfdata_add(label => 'slave_latency', unit => 's',
value => $num_sec_lates,
warning => $self->{perfdata}->get_perfdata_for_output(label => 'warning'),
critical => $self->{perfdata}->get_perfdata_for_output(label => 'critical'),
min => 0);
my $slave_sql_thread_ko = 1;
my $slave_sql_thread_warning = 1;
my $slave_sql_thread_ok = 1;
$slave_save->query(query => q{
SHOW FULL PROCESSLIST
});
while ((my $row = $slave_save->fetchrow_hashref())) {
my $state = $row->{State};
$slave_sql_thread_ko = 0 if (defined($state) && $state =~ /^(Waiting to reconnect after a failed binlog dump request|Connecting to master|Reconnecting after a failed binlog dump request|Waiting to reconnect after a failed master event read|Waiting for the slave SQL thread to free enough relay log space)$/i);
$slave_sql_thread_warning = 0 if (defined($state) && $state =~ /^Waiting for the next event in relay log|Reading event from the relay log$/i);
$slave_sql_thread_ok = 0 if (defined($state) && $state =~ /^Has read all relay log; waiting for the slave I\/O thread to update it$/i);
}
if ($slave_sql_thread_ko == 0) {
$position_status = 1;
$position_status_error .= " Slave replication has connection issue with the master.";
} elsif (($master_file ne $slave_file || $master_position != $slave_position) && $slave_sql_thread_warning == 0) {
$position_status = -1;
$position_status_error .= " Slave replication is late but it's progressing.";
} elsif (($master_file ne $slave_file || $master_position != $slave_position) && $slave_sql_thread_ok == 0) {
$position_status = -1;
$position_status_error .= " Slave replication is late but it's progressing.";
} else {
$master_file =~ /(\d+)$/;
my $master_bin_num = $1;
$slave_file =~ /(\d+)$/;
my $slave_bin_num = $1;
my $diff_binlog = abs($master_bin_num - $slave_bin_num);
# surely of missconfiguration of the plugin
if ($diff_binlog > 1 && $num_sec_lates < 10) {
$position_status = -3;
$position_status_error .= " Surely a configuration problem of the plugin (not good master and slave server used)";
}
}
}
}
$self->replication_add($slave_status, "Slave Thread Status", $slave_status_error);
$self->replication_add($position_status, "Position Status", $position_status_error);
$self->{output}->display();
$self->{output}->exit();
}
sub replication_add {
my ($self, $lstate, $str_display, $lerr) = @_;
my $status;
my $status_msg;
if ($lstate == 0) {
$status = 'OK';
} elsif ($lstate == -1) {
$status = 'WARNING';
} elsif ($lstate == -2) {
$status = 'CRITICAL';
$status_msg = 'SKIP';
} elsif ($lstate == -3) {
$status = 'UNKNOWN';
} else {
$status = 'CRITICAL';
}
my $output;
if (defined($lerr) && $lerr ne "") {
$output = $str_display . " [" . (defined($status_msg) ? $status_msg : $status) . "] [" . $lerr . "]";
} else {
$output = $str_display . " [" . (defined($status_msg) ? $status_msg : $status) . "]";
}
if (!$self->{output}->is_status(value => $status, compare => 'ok', litteral => 1)) {
$self->{output}->output_add(severity => $status,
short_msg => $output);
}
$self->{output}->output_add(long_msg => $output);
}
1;
__END__
=head1 MODE
Check MySQL replication master/slave (need to use --multiple).
=over 8
=item B<--warning>
Threshold warning in seconds (slave latency).
=item B<--critical>
Threshold critical in seconds (slave latency).
=back
=cut
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