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#!/usr/bin/perl -w
#
# check_mysqlslave.pl - nagios plugin
#
#
# Copyright 2002 Mario Witte
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Credits:
# - Thanks to Christoph Kron <ck@zet.net> for check_ifstatus.pl
# I used check_ifstatus.pl as a layout when writing this
#
# Report bugs to: chengfu@users.sourceforge.net
#
# 20.09.2002 Version 0.1
use strict;
use lib "/usr/local/nagios/libexec";
use utils qw($TIMEOUT %ERRORS &print_revision &support);
use DBI;
use DBD::mysql;
use Getopt::Long;
Getopt::Long::Configure('bundling');
# Predeclare some variables
my $PROGNAME = 'check_mysqlslave';
my $REVISION = '0.1';
my $status;
my $state = 'UNKNOWN';
my $opt_V;
my $opt_h;
my $port = 3306;
my $hostname;
my $user = 'root';
my $pass = '';
my $driver;
my $dbh;
my $query;
my $result;
my $data;
# Just in case of problems, let's not hang Nagios
$SIG{'ALRM'} = sub {
print ("ERROR: No response from $hostname (alarm timeout)\n");
exit $ERRORS{"UNKNOWN"};
};
alarm($TIMEOUT);
$status = GetOptions(
"V" => \$opt_V, "version" => \$opt_V,
"h" => \$opt_h, "help" => \$opt_h,
"p=i" => \$port, "port=i" => \$port,
"H=s" => \$hostname, "hostname=s" => \$hostname,
"u=s" => \$user, "user=s" => \$user,
"P=s" => \$pass, "pass=s" => \$pass,
);
if ($status == 0) {
print_help() ;
exit $ERRORS{'OK'};
}
if ($opt_V) {
print_revision($PROGNAME,'$Revision$REVISION .' $ ');
exit $ERRORS{'OK'};
}
if ($opt_h) {
print_help();
exit $ERRORS{'OK'};
}
if (! utils::is_hostname($hostname)){
usage();
exit $ERRORS{"UNKNOWN"};
}
$driver = 'DBI:mysql::'. $hostname;
eval {
$dbh = DBI->connect($driver, $user, $pass, { RaiseError => 1, PrintError => 0});
};
if ($@) {
$status = $@;
if ($status =~ /^.*failed:\ (.+)\ at\ $0/i) { $status = $1; }
$state='CRITICAL';
print $state .': Connect failed: '."$status\n";
exit ($ERRORS{$state});
}
eval {
$query = 'SHOW SLAVE STATUS';
$result = $dbh->prepare($query);
$result->execute;
$data = $result->fetchrow_hashref();
$result->finish();
$dbh->disconnect();
};
if ($@) {
$status = $@;
$status =~ s/\n/ /g;
if ($status =~ /^DB[ID].*(failed|prepare):\ (.+)\ at\ $0/i) { $status = $2; }
$state = 'CRITICAL';
print $state .': Couldn\'t check slave: '."$status\n";
exit($ERRORS{$state});
}
if ($data->{'Slave_Running'} eq 'Yes') {
$status = 'Replicating from '. $data->{'Master_Host'};
$state = 'OK';
print $state .': '. $status ."\n";
exit($ERRORS{$state});
} elsif ($data->{'Slave_Running'} eq 'No') {
if (length($data->{'Last_error'}) > 0) {
$status = 'Slave stopped with error message';
$state = 'CRITICAL';
print $state .': '. $status ."\n";
exit($ERRORS{$state});
} else {
$status = 'Slave stopped without errors';
$state = 'WARNING';
print $state .': '. $status ."\n";
exit($ERRORS{$state});
}
} else {
$status = 'Unknown slave status: (Running: '. $data->{'Slave_Running'} .')';
$state = 'UNKNOWN';
print $state .': '. $status ."\n";
exit($ERRORS{$state});
}
sub usage {
printf "\nMissing arguments!\n";
printf "\n";
printf "check_mysqlslave -H <hostname> [-p <port> -u <username> -P <password>]\n";
printf "Copyright 2002 Mario Witte\n";
printf "\n\n";
support();
exit $ERRORS{"UNKNOWN"};
}
sub print_help {
printf "check_mysqlslave plugin for Nagios checks \n";
printf "if the replication on a backup mysql-server\n";
printf "is up and running\n";
printf "\nUsage:\n";
printf " -H (--hostname) Hostname to query\n";
printf " -p (--port) mysql port (default: 3306)\n";
printf " -u (--user) username for accessing mysql host\n";
printf " (default: root)\n";
printf " -P (--pass) password for accessing mysql host\n";
printf " (default: '')\n";
printf " -V (--version) Plugin version\n";
printf " -h (--help) usage help \n\n";
print_revision($PROGNAME, '$Revision$REVISION .' $');
}
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