Initial version

plugins/other/mysql_slave_threads

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+#!/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} || "";
+
+if(defined $ARGV[0] && $ARGV[0] eq 'config') {
+    print <<EOC
+graph_title MySQL Slave Threads
+graph_vlabel Running
+graph_category mysql
+graph_args -l 0
+io.label I/O Thread
+io.critical 1:1
+sql.label SQL Thread
+sql.critical 1:1
+EOC
+;
+        exit 0;
+}
+
+my $status = `$MYSQL $MYSQLOPTS -e 'SHOW SLAVE STATUS\\G'`;
+
+$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";
+
+