Munin contributed plugins

#!/usr/bin/perl

# Munin plugin for MySQL slave threads monitoring

# Copyright © 2009 Eutech SSII

#

# 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 3 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, see <http://www.gnu.org/licenses/>.

#

# Plugin producing state graphes for a MySQL slave server (1 if

# I/O or SQL thread is running, 0 otherwise). Can be used to

# trigger a warning when a replication failure occurs.

use strict;

my $MYSQL = $ENV{mysql} || "mysql";

my $MYSQLOPTS = $ENV{mysqlopts} || "";

my $status = `$MYSQL $MYSQLOPTS -e 'SHOW SLAVE STATUS\\G'`;

my $sqlerror = "";

my $ioerror = "";

if ($status =~ /Last_SQL_Error: (.+)/) {

  $sqlerror = $1;

}

if ($status =~ /Last_IO_Error: (.+)/) {

  $ioerror = $1;

}

if(defined $ARGV[0] && $ARGV[0] eq 'config') {

    print <<EOC

graph_title MySQL Slave Threads

graph_vlabel Running

graph_category db

graph_args -l 0

io.label I/O Thread

io.critical 1:1

io.extinfo $ioerror

sql.label SQL Thread

sql.critical 1:1

sql.extinfo $sqlerror

EOC

;

        exit 0;

}

$status =~ /Slave_IO_Running: (\w+)/;

print 'io.value '.($1 eq 'Yes' ? 1 : 0)."\n";

$status =~ /Slave_SQL_Running: (\w+)/;

print 'sql.value '.($1 eq 'Yes' ? 1 : 0)."\n";