df_abs

#!/bin/sh
#
# Script to monitor absolute disk usage. The script is forked from the one shipped with
# some munin 1.2.x version because it continously showed some useless
# filesystems. This version is extended so it can exclude certain filesystems
# or devices.
#
# Parameters understood:
#
# 	config   (required)
# 	autoconf (optional - used by munin-config)
#
# Configuration:
#
# This script supports four environment variables:
#	EXCLUDE_FS	- Exclude given filesystems
#			  (default: iso9660, udf and none.)
#	EXCLUDE_DEVS	- Exclude filesystems on given devices. This is useful
#			  to exclude pseudo filesystems like /dev or /proc.
#			  (default: "none" - which excludes most pseudo
#				filesystems.)
#   EXCLUDE_MOUNTS  - Exclude given mountpoints (default: 
#             "^(/dev/shm|/sys/fs/cgroup)$").
#   MOUNTPOINT_AS_LABEL - Filesystems where the mount point should be used as
#             label (instead of the device path). Useful for pseudo-fileystems
#             that don't have a real device (default: "^(udev|tmpfs)$").
# Note that setting any of these settings *overrides* the default values and
# does NOT *add* to them.
#
# Example configuration:
#
# The following example excludes XFS and JFS filesystems and any filesystems
# with device "none" or "/scratch":
#
# [df]
# env.EXCLUDE_FS=xfs jfs
# env.EXCLUDE_DEVS=none /scratch
#
# $Log$
#
# Revision 2.1.3    2016/07/31 17:56  Mathias Ertl <mati@fsinf.at>
# * Exclude any filesystem under /run.
#
# Revision 2.1.2    2016/07/08 18:04  Mathias Ertl <mati@fsinf.at>
# * Exclude /run/user/[0-9]+ tmpfs filesystems, their existance is dynamic
#   and depends on who is currently logged in.
#
# Revision 2.1      2016/01/01 16:20  Mathias Ertl <mati@fsinf.at>
# * Added EXCLUDE_MOUNTS and MOUNTPOINT_AS_LABEL parameters.
# * Exclude devtmpfs (-> /dev) filesystems by default.
#
# Revision 2.0      2010-08-29 14:03:11  Mathias Ertl <mati@fsinf.at>
# Added EXLCUDE_FS and EXCLUDE_TYPE paramaters
#
# Revision 1.2.2.1  2005/02/16 22:50:14  jimmyo
# linux/df* now ignores bind mounts.
#
# Revision 1.2  2004/08/24 13:37:29  ilmari
# Add total line
#
# Revision 1.1  2004/08/24 12:26:48  ilmari
# Added plugin linux/df_abs
#
# Magic markers (optional - used by munin-config and installation
# scripts):
#
#%# family=auto
#%# capabilities=autoconf

if [ "$1" = "autoconf" ]; then
	echo yes
	exit 0
fi

[ -z $EXCLUDE_DEVS ] && EXCLUDE_DEVS="none"
[ -z $EXCLUDE_FS ] && EXCLUDE_FS="iso9660 udf none devtmpfs"
[ -z $EXCLUDE_MOUNTS ] && EXCLUDE_MOUNTS="^(/dev/shm|/sys/fs/cgroup|/run/?.*)$"
[ -z $MOUNTPOINT_AS_LABEL ] && MOUNTPOINT_AS_LABEL="^(udev|tmpfs)$"
DF_PARAMS='-T -P -l'
for fs in $EXCLUDE_FS; do
	DF_PARAMS="$DF_PARAMS -x $fs"
done

clean_name() {
    if [ "$(echo $1 | egrep -c "$MOUNTPOINT_AS_LABEL")" -eq "1" ]; then
	    echo $7 | sed 's/[\/.-]/_/g'
    else
	    echo $1 | sed 's/[\/.-]/_/g'
    fi
}

# Determine if a device should be excluded or not. Return 1 (true) if the device
# name is listed in EXCLUDE_DEVS or the mount point is listed in EXCLUDE_MOUNTS,
# 0 (false) otherwise.
exclude_dev() {
	if [ "$(echo $EXCLUDE_DEVS | grep -c $1)" -eq "1" ]; then
		return 1
	else
        if [ "$(echo $7 | egrep -c "$EXCLUDE_MOUNTS")" -eq "1" ]; then
            return 1
        fi
		return 0
	fi
}

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

	echo 'graph_title Filesystem usage (in bytes)'
	echo 'graph_args --base 1024 --lower-limit 0'
	echo 'graph_vlabel bytes'
	echo 'graph_category disk'
	echo 'graph_total Total'
	df $DF_PARAMS | sed 1d | while read i; do
		exclude_dev $i
		if [ "$?" -eq "1" ]; then
			continue
		fi

		name=`clean_name $i`
		echo -n "$name.label "
		echo $i | awk "{ 
			print \$7
			print \"$name.info \" \$7 \" (\" \$2 \") -> \" \$1;
		}"
		echo "$name.cdef $name,1024,*"
		size=`echo $i | awk '{print $3}'`
		echo "$name.warning $((size / 100 * 92))"
		echo "$name.critical $((size / 100 * 98))"
	done
	exit 0
fi

df $DF_PARAMS | sed 1d | while read i; do
	exclude_dev $i
	if [ "$?" -eq "1" ]; then
		continue
	fi

	name=`clean_name $i`
	echo -n "$name.value "
	echo $i | awk '{ print $4 }'
done