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#!/bin/sh
# ########################################################################
# This program is part of $PROJECT_NAME$
# License: GPL License (see COPYING)
# Authors:
# Baron Schwartz
# Depends-on: pt-deadlock-logger
# ########################################################################
# ########################################################################
# Redirect STDERR to STDOUT; Nagios doesn't handle STDERR.
# ########################################################################
exec 2>&1
# ########################################################################
# Set up constants, etc.
# ########################################################################
STATE_OK=0
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
STATE_DEPENDENT=4
# ########################################################################
# Run the program.
# ########################################################################
main() {
# Get options
for o; do
case "${o}" in
-c) shift; OPT_CRIT="${1}"; shift; ;;
--defaults-file) shift; OPT_DEFT="${1}"; shift; ;;
-H) shift; OPT_HOST="${1}"; shift; ;;
-i) shift; OPT_INTERVAL="${1}"; shift; ;;
-l) shift; OPT_USER="${1}"; shift; ;;
-L) shift; OPT_LOPA="${1}"; shift; ;;
-p) shift; OPT_PASS="${1}"; shift; ;;
-P) shift; OPT_PORT="${1}"; shift; ;;
-S) shift; OPT_SOCK="${1}"; shift; ;;
-T) shift; OPT_TABLE="${1}"; shift; ;;
-w) shift; OPT_WARN="${1}"; shift; ;;
--version) grep -A2 '^=head1 VERSION' "$0" | tail -n1; exit 0 ;;
--help) perl -00 -ne 'm/^ Usage:/ && print' "$0"; exit 0 ;;
-*) echo "Unknown option ${o}. Try --help."; exit 1; ;;
esac
done
OPT_WARN=${OPT_WARN:-12}
OPT_CRIT=${OPT_CRIT:-60}
OPT_INTERVAL=${OPT_INTERVAL:-1}
OPT_TABLE="${OPT_TABLE:-percona.deadlocks}"
if [ -e '/etc/nagios/mysql.cnf' ]; then
OPT_DEFT="${OPT_DEFT:-/etc/nagios/mysql.cnf}"
fi
if is_not_sourced; then
if [ -n "$1" ]; then
echo "WARN spurious command-line options: $@"
exit 1
fi
fi
LEVEL=$(mysql_exec "SELECT COUNT(*) FROM ${OPT_TABLE} WHERE server IN ('${OPT_HOST}', @@hostname) AND ts >= NOW() - INTERVAL ${OPT_INTERVAL}*60 SECOND")
if [ $? = 0 ]; then
NOTE="${LEVEL:-UNKNOWN} deadlocks in last ${OPT_INTERVAL} minutes"
if [ "${LEVEL:-0}" -gt "${OPT_CRIT}" ]; then
NOTE="CRIT $NOTE"
elif [ "${LEVEL:-0}" -gt "${OPT_WARN}" ]; then
NOTE="WARN $NOTE"
else
NOTE="OK $NOTE"
fi
# Build the common perf data output for graph trending
PERFDATA="deadlocks=${LEVEL:-0};${OPT_WARN};${OPT_CRIT};0;"
NOTE="$NOTE | $PERFDATA"
else
NOTE="UNK could not count deadlocks"
fi
echo $NOTE
}
# ########################################################################
# Execute a MySQL command.
# ########################################################################
mysql_exec() {
mysql ${OPT_DEFT:+--defaults-file="${OPT_DEFT}"} ${OPT_HOST:+-h"${OPT_HOST}"} ${OPT_USER:+-u"${OPT_USER}"} \
${OPT_PASS:+-p"${OPT_PASS}"} ${OPT_SOCK:+-S"${OPT_SOCK}"} ${OPT_PORT:+-P"${OPT_PORT}"} \
${OPT_LOPA:+--login-path="${OPT_LOPA}"} -ss -e "$1"
}
# ########################################################################
# Determine whether this program is being executed directly, or sourced/included
# from another file.
# ########################################################################
is_not_sourced() {
[ "${0##*/}" = "pmp-check-mysql-deadlocks" ] || [ "${0##*/}" = "bash" -a "$_" = "$0" ]
}
# ########################################################################
# Execute the program if it was not included from another file.
# This makes it possible to include without executing, and thus test.
# ########################################################################
if is_not_sourced; then
OUTPUT=$(main "$@")
EXITSTATUS=$STATE_UNKNOWN
case "${OUTPUT}" in
UNK*) EXITSTATUS=$STATE_UNKNOWN; ;;
OK*) EXITSTATUS=$STATE_OK; ;;
WARN*) EXITSTATUS=$STATE_WARNING; ;;
CRIT*) EXITSTATUS=$STATE_CRITICAL; ;;
esac
echo "${OUTPUT}"
exit $EXITSTATUS
fi
# ############################################################################
# Documentation
# ############################################################################
: <<'DOCUMENTATION'
=pod
=head1 NAME
pmp-check-mysql-deadlocks - Alert when pt-deadlock-logger has recorded too many recent deadlocks.
=head1 SYNOPSIS
Usage: pmp-check-mysql-deadlocks [OPTIONS]
Options:
-c CRIT Critical threshold; default 60.
--defaults-file FILE Only read mysql options from the given file.
Defaults to /etc/nagios/mysql.cnf if it exists.
-H HOST MySQL hostname.
-i INTERVAL Interval over which to count, in minutes; default 1.
-l USER MySQL username.
-L LOGIN-PATH Use login-path to access MySQL (with MySQL client 5.6).
-p PASS MySQL password.
-P PORT MySQL port.
-S SOCKET MySQL socket file.
-T TABLE The database.table that pt-deadlock-logger uses; default percona.deadlocks.
-w WARN Warning threshold; default 12.
--help Print help and exit.
--version Print version and exit.
Options must be given as --option value, not --option=value or -Ovalue.
Use perldoc to read embedded documentation with more details.
=head1 DESCRIPTION
This Nagios plugin looks at the table that pt-deadlock-logger (part of Percona
Toolkit) maintains, and when there have been too many recent deadlocks, it
alerts.
=head1 PRIVILEGES
This plugin executes the following commands against MySQL:
=over
=item *
C<SELECT> from the C<pt-deadlock-logger> table.
=back
This plugin executes no UNIX commands that may need special privileges.
=head1 COPYRIGHT, LICENSE, AND WARRANTY
This program is copyright 2012-$CURRENT_YEAR$ Baron Schwartz, 2012-$CURRENT_YEAR$ Percona Inc.
Feedback and improvements are welcome.
THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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, version 2. 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.
=head1 VERSION
$PROJECT_NAME$ pmp-check-mysql-deadlocks $VERSION$
=cut
DOCUMENTATION
|
