Current Path : /opt/zabbix_scripts/ |
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Current File : //opt/zabbix_scripts/check_mysql_connections |
#!/usr/bin/perl
# Copyright (c) 2012 Jason Hancock <jsnbyh@gmail.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is furnished
# to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# This file is part of the nagios-mysql bundle that can be found
# at https://github.com/jasonhancock/nagios-mysql
#
# This plugin reports on connection statistics for MySQL. It takes warning
# and critical thresholds expressed as percents of the maximum number of
# connections allowed by the database server
use strict;
use warnings;
use Nagios::Plugin;
use DBI;
my $np = Nagios::Plugin->new(
usage => "Usage: %s [-H|--host=<host> ] [ -t|--type=<type> ]",
shortname => 'MySQL Connections',
);
$np->add_arg(
spec => 'host|H=s',
help => '-H, --host=hostname or IP',
required => 1,
);
$np->add_arg(
spec => 'port|P=s',
help => '-P, --port=port',
default => 3306,
);
$np->add_arg(
spec => 'user|u=s',
help => '-u, --user=username',
required => 1,
);
$np->add_arg(
spec => 'pass|p=s',
help => '-p, --pass=password',
required => 1,
);
$np->add_arg(
spec => 'warning|w=s',
help => '-w, --warning=percent',
required => 1,
);
$np->add_arg(
spec => 'critical|c=s',
help => '-c, --critical=percent',
required => 1,
);
$np->getopts;
# a hash for quick lookups
my %interests = (
'Aborted_clients' => 1,
'Aborted_connects' => 1,
'Threads_connected' => 1,
'Connections' => 1,
'Max_used_connections' => 1
);
# The order in which we will output the stats
my @order = (
'max_connections',
'max_used_connections',
'threads_connected',
'aborted_clients',
'aborted_connects',
'connections'
);
my %data;
# Connect to the database
my $ds = sprintf('DBI:mysql::%s:%d', $np->opts->host, $np->opts->port);
my $dbh = DBI->connect($ds, $np->opts->user, $np->opts->pass, { PrintError => 0 }) or
$np->nagios_exit('UNKNOWN', 'Unable to connect to database');
# Run the query
my $qh = $dbh->prepare('SHOW GLOBAL STATUS') or
$np->nagios_exit('UNKNOWN', 'UNABLE to prepare query');
$qh->execute();
while(my ($name, $value) = $qh->fetchrow_array()) {
$data{lc($name)} = $value if defined($interests{$name});
}
$qh->finish();
$qh = $dbh->prepare('SHOW GLOBAL VARIABLES LIKE \'max_connections\'') or
$np->nagios_exit('UNKNOWN', 'UNABLE to prepare query');
$qh->execute();
while(my ($name, $value) = $qh->fetchrow_array()) {
$data{lc($name)} = $value;
}
$qh->finish();
$dbh->disconnect();
foreach my $key(@order) {
$np->add_perfdata(
label => $key,
value => $data{$key},
uom => undef,
);
}
my $code = $np->check_threshold(
check => $data{'threads_connected'},
warning => int($np->opts->warning * .01 * $data{'max_connections'}),
critical => int($np->opts->critical * .01 * $data{'max_connections'}),
);
$np->nagios_exit(
return_code => $code,
message => sprintf('Connections used: %d maximum: %d',
$data{'threads_connected'},
$data{'max_connections'},
),
);
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