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Diffstat (limited to 'nagios-plugins-contrib-24.20190301~bpo9+1/percona-nagios-plugins/nagios/bin/pmp-check-unix-memory')
| -rwxr-xr-x | nagios-plugins-contrib-24.20190301~bpo9+1/percona-nagios-plugins/nagios/bin/pmp-check-unix-memory | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/nagios-plugins-contrib-24.20190301~bpo9+1/percona-nagios-plugins/nagios/bin/pmp-check-unix-memory b/nagios-plugins-contrib-24.20190301~bpo9+1/percona-nagios-plugins/nagios/bin/pmp-check-unix-memory new file mode 100755 index 0000000..a9a3fdc --- /dev/null +++ b/nagios-plugins-contrib-24.20190301~bpo9+1/percona-nagios-plugins/nagios/bin/pmp-check-unix-memory @@ -0,0 +1,207 @@ +#!/bin/sh + +# ######################################################################## +# This program is part of $PROJECT_NAME$ +# License: GPL License (see COPYING) +# Authors: +# Baron Schwartz, Roman Vynar +# ######################################################################## + +# ######################################################################## +# Redirect STDERR to STDOUT; Nagios doesn't handle STDERR. +# ######################################################################## +exec 2>&1 + +# ######################################################################## +# Set up constants, etc. +# ######################################################################## +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 "${o}" in + -w) shift; OPT_WARN="${1}"; shift; ;; + -d) shift; ;; # left for backward-compatibility + -c) shift; OPT_CRIT="${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:-90} + OPT_CRIT=${OPT_CRIT:-95} + if is_not_sourced; then + if [ -n "$1" ]; then + echo "WARN spurious command-line options: $@" + exit 1 + fi + fi + + NOTE="UNK cannot find memory statistics" + TEMP=$(mktemp -t "${0##*/}.XXXXXX") || exit $? + trap "rm -f '${TEMP}' >/dev/null 2>&1" EXIT + if [ -e /proc/meminfo ] && cat /proc/meminfo > "${TEMP}" ; then + USD_PCT=$(get_used_memory_linux "${TEMP}") + elif which sysctl > /dev/null && sysctl -a > "${TEMP}" ; then + USD_PCT=$(get_used_memory_bsd "${TEMP}") + else + echo $NOTE + exit + fi + + NOTE="Memory ${USD_PCT}% used" + if [ "${USD_PCT:-0}" -ge "${OPT_CRIT}" ]; then + NOTE="CRIT $NOTE. $(get_largest_process)" + elif [ "${USD_PCT:-0}" -ge "${OPT_WARN}" ]; then + NOTE="WARN $NOTE. $(get_largest_process)" + else + NOTE="OK $NOTE" + fi + + # Build the common perf data output for graph trending + PERFDATA="memory_used=${USD_PCT:-0};${OPT_WARN};${OPT_CRIT};0;100" + echo "$NOTE | $PERFDATA" +} + +# ######################################################################## +# Find the largest process +# ######################################################################## +get_largest_process () { + ALL_PROCS=$(ps axo pid,%mem,ucomm | sort -k2 -nr) + BIGGEST=$(echo $ALL_PROCS | head -n 1) + BIG_PID=$(echo $BIGGEST | cut -d' ' -f1) + BIG_MEM=$(echo $BIGGEST | cut -d' ' -f2) + BIG_COMMAND=$(echo $BIGGEST | cut -d' ' -f3) + echo "Largest process: ${BIG_COMMAND} (${BIG_PID}) = ${BIG_MEM}%" +} + +# ######################################################################## +# Get the used memory from /proc/meminfo +# Consider MemAvailable if available in the file (starting procps-ng 3.3.10). +# See https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=34e431b0ae398fc54ea69ff85ec700722c9da773 +# ######################################################################## +get_used_memory_linux() { +awk '/^MemTotal:/ {total = $2;} + /^MemFree:/ {free = $2;} + /^MemAvailable:/ {avail = $2;} + /^Buffers:/ {buffers = $2;} + /^Cached:/ {cached = $2; + if (avail == "") avail = free + buffers + cached; + printf "%d\n", (total - avail) / total * 100;}' "$1" +} +# ######################################################################## +# Get the used memory from sysctl for BSD systems +# ######################################################################## +get_used_memory_bsd() { + awk '/vm.stats.vm.v_cache_count:/ {cache = $2} + /vm.stats.vm.v_inactive_count:/ {inactive = $2} + /vm.stats.vm.v_free_count:/ {free = $2} + /vm.stats.vm.v_page_count:/ { + total = $2; + used = total - inactive - cache - free; + printf "%d\n", used / total * 100}' "$1" +} + +# ######################################################################## +# Determine whether this program is being executed directly, or sourced/included +# from another file. +# ######################################################################## +is_not_sourced() { + [ "${0##*/}" = "pmp-check-unix-memory" ] || [ "${0##*/}" = "bash" -a "$_" = "$0" ] +} + +# ######################################################################## +# Execute the program if it was not included from another file. +# This makes it possible to include without executing, and thus test. +# ######################################################################## +if is_not_sourced; then + OUTPUT=$(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 $EXITSTATUS +fi + +# ############################################################################ +# Documentation +# ############################################################################ +: <<'DOCUMENTATION' +=pod + +=head1 NAME + +pmp-check-unix-memory - Alert on low memory. + +=head1 SYNOPSIS + + Usage: pmp-check-unix-memory [OPTIONS] + Options: + -c CRIT Critical threshold; default 95%. + -w WARN Warning threshold; default 90%. + --help Print help and exit. + --version Print version and exit. + Options must be given as --option value, not --option=value or -Ovalue. + Use perldoc to read embedded documentation with more details. + +=head1 DESCRIPTION + +This Nagios plugin examines C</proc/meminfo> (Linux) or the output of C<sysctl> (BSD) +to check whether the system is running out of memory and finds the largest +process in memory from C<ps> output. + +The plugin is tested on GNU/Linux and FreeBSD. + +=head1 PRIVILEGES + +This plugin does not access MySQL. + +This plugin executes the following UNIX commands that may need special privileges: + +=over + +=item * + +cat /proc/meminfo (Linux), sysctl (BSD) + +=item * + +ps + +=back + +=head1 COPYRIGHT, LICENSE, AND WARRANTY + +This program is copyright 2012-$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-unix-memory $VERSION$ + +=cut + +DOCUMENTATION |