#!/bin/sh
#
# Copyright (c) 2019-2022 Mischa Peters <mischa @ openbsd.amsterdam>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
test -n "$1" || exit 1
HOST="$1"
AUTHPASS="tropic shark reefs"
USER="random"
PRIVPASS="equ5xerhiffid7klevuk"
RRDFILES="/home/mischa/rrd"
IMAGES="/var/www/rrdtool/obsda.ms"
WATERMARK="OpenBSD Amsterdam - https://obsda.ms"
RRDTOOL="/usr/local/bin/rrdtool"
CPUINFO="/tmp/${HOST}-cores.txt"
UPTIME=$(cat /tmp/${HOST}-uptime.txt)
NOW=$(date "+%Y-%m-%d %H:%M:%S %Z" | sed 's/:/\\:/g')

if ! test -f "${RRDFILES}/${HOST}-cores.rrd"
then
echo "Creating ${RRDFILES}/${HOST}-cores.rrd"
${RRDTOOL} create ${RRDFILES}/${HOST}-cores.rrd \
	--step 300 \
	DS:ds0:GAUGE:600:U:U \
	DS:ds1:GAUGE:600:U:U \
	DS:ds2:GAUGE:600:U:U \
	DS:ds3:GAUGE:600:U:U \
	DS:ds4:GAUGE:600:U:U \
	DS:ds5:GAUGE:600:U:U \
	DS:ds6:GAUGE:600:U:U \
	DS:ds7:GAUGE:600:U:U \
	DS:ds8:GAUGE:600:U:U \
	DS:ds9:GAUGE:600:U:U \
	DS:ds10:GAUGE:600:U:U \
	DS:ds11:GAUGE:600:U:U \
	RRA:MAX:0.5:1:20000
fi

snmp walk -A "${AUTHPASS}" -l authPriv -u ${USER} -X "${PRIVPASS}" ${HOST} hrProcessorLoad | awk '{print $4}' > ${CPUINFO}
CORES=$(cat ${CPUINFO} | wc -l)
ACT_CORES=$((${CORES}/2))
CPU_LOAD=$(cat ${CPUINFO} | paste -s -d: - | cut -d: -f1-${ACT_CORES})

${RRDTOOL} update ${RRDFILES}/${HOST}-cores.rrd N:${CPU_LOAD}

${RRDTOOL} graph ${IMAGES}/${HOST}-cores.png \
	--start -432000 \
	--title "${HOST} - CPU" \
	--vertical-label "% CPU Used" \
	--watermark "${WATERMARK}" \
	DEF:CORE0=${RRDFILES}/${HOST}-cores.rrd:ds0:AVERAGE \
	DEF:CORE1=${RRDFILES}/${HOST}-cores.rrd:ds1:AVERAGE \
	DEF:CORE2=${RRDFILES}/${HOST}-cores.rrd:ds2:AVERAGE \
	DEF:CORE3=${RRDFILES}/${HOST}-cores.rrd:ds3:AVERAGE \
	DEF:CORE4=${RRDFILES}/${HOST}-cores.rrd:ds4:AVERAGE \
	DEF:CORE5=${RRDFILES}/${HOST}-cores.rrd:ds5:AVERAGE \
	DEF:CORE6=${RRDFILES}/${HOST}-cores.rrd:ds6:AVERAGE \
	DEF:CORE7=${RRDFILES}/${HOST}-cores.rrd:ds7:AVERAGE \
	DEF:CORE8=${RRDFILES}/${HOST}-cores.rrd:ds8:AVERAGE \
	DEF:CORE9=${RRDFILES}/${HOST}-cores.rrd:ds9:AVERAGE \
	DEF:CORE10=${RRDFILES}/${HOST}-cores.rrd:ds10:AVERAGE \
	DEF:CORE11=${RRDFILES}/${HOST}-cores.rrd:ds11:AVERAGE \
	LINE1:CORE0#FFFA00:"CORE0" \
	LINE1:CORE1#FFFA00:"CORE1" \
	LINE1:CORE2#FFF000:"CORE2" \
	LINE1:CORE3#FFE600:"CORE3" \
	LINE1:CORE4#FFDC00:"CORE4" \
	LINE1:CORE5#FFD200:"CORE5" \
	LINE1:CORE6#FFC800:"CORE6" \
	LINE1:CORE7#FFBE00:"CORE7" \
	LINE1:CORE8#FFB400:"CORE8" \
	LINE1:CORE9#FFAA00:"CORE9" \
	LINE1:CORE10#FFA000:"CORE10" \
	LINE1:CORE11#FF9600:"CORE11" \
        COMMENT:"\\n" \
        COMMENT:"  Up for ${UPTIME} at ${NOW}"