Munin contributed plugins

#!/bin/bash

#

# Plugin to monitor Memory usage inspired by cpubyuser

#

# Usage: Place in /etc/munin/plugins/ (or link it there using ln -s)

#	Add this to your /etc/munin/plugin-conf.d/munin-node:

#		[membyuser]

#		user root # required if /proc can't be read from by any user!

## 2012-05-23 Sebastien Campion

# changed on 2019-08-30 by pcy <pcy@ulyssis.org>:

# - change category from 'memory' to 'system' (so it appears next to cpubyuser)

# - use rss instead of vsz

# - more robust username enumeration

USERS="$(ps ax --format uname | tail +2 | sort -u | grep -v -e '^root$')"

if [ "$1" = "autoconf" ]; then

	if [ -n "$USERS" ]; then

		echo "yes"

	else

		echo "\$USERS not defined."

	fi

	exit

fi

if [ "$1" = "config" ]; then

	echo "graph_args --base 1024"

	echo "graph_title Memory usage, by user"

	echo "graph_category memory"

	echo "graph_info This graph shows memory usage, for monitored users."

	echo "graph_vlabel Bytes"

	echo "graph_period second"

	_USERS=${USERS//[-.]/_}

	echo "graph_order $_USERS others"

	FIRSTUSER=1;

	for USER in $USERS "others"; do

		_USER=${USER//[-.]/_}

		echo "${_USER}.label $USER"

		echo "${_USER}.info Memory used by user $USER"

		echo "${_USER}.type GAUGE"

		echo "${_USER}.draw AREASTACK"

	done

	exit

fi

ps -e -o rss,user | \

	awk -v USERS="$USERS" '

		{ if ($2 != "USER") MEM_USER[$2]+=$1 }

		END {

			others_sum = 0

			for (user in MEM_USER) {

				m = match(USERS,user)

				if (m != 0) {

					_user=user

					gsub(/[-.]/,"_", _user);

					print _user".value", (MEM_USER[user] * 1024)

				} else

					others_sum += (MEM_USER[user] * 1024)

			}

		print "others.value", others_sum;

	}'