1 #!/bin/sh
2 #
3 # Copyright (c) 2019-2021 Mischa Peters <mischa @ openbsd.amsterdam>
4 #
5 # Permission to use, copy, modify, and distribute this software for any
6 # purpose with or without fee is hereby granted, provided that the above
7 # copyright notice and this permission notice appear in all copies.
8 #
9 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 #
17 test -n "$1" || exit 1
18 HOST="$1"
19 COMMUNITY="public"
20 RRDFILES="/home/mischa/rrd"
21 IMAGES="/var/www/rrdtool/obsda.ms"
22 WATERMARK="OpenBSD Amsterdam - https://obsda.ms"
23 RRDTOOL="/usr/local/bin/rrdtool"
24 CPUINFO="/tmp/${HOST}-cpu.txt"
25 UPTIME=$(cat /tmp/${HOST}-uptime.txt)
26 VERSION=$(cat /tmp/${HOST}-version.txt)
27 NOW=$(date "+%Y-%m-%d %H:%M:%S %Z" | sed 's/:/\\:/g')
28 
29 if ! test -f "${RRDFILES}/${HOST}-cpu.rrd"
30 then
31 echo "Creating ${RRDFILES}/${HOST}-cpu.rrd"
32 ${RRDTOOL} create ${RRDFILES}/${HOST}-cpu.rrd \
33 	--step 300 \
34 	DS:ds0:GAUGE:600:U:U \
35 	RRA:MAX:0.5:1:20000
36 fi
37 
38 snmp walk -c ${COMMUNITY} ${HOST} hrProcessorLoad | awk '{print $4}' > ${CPUINFO}
39 CORES=$(grep -cv "^0$" ${CPUINFO})
40 CPU_LOAD_SUM=$(awk '{sum += $1} END {print sum}' ${CPUINFO})
41 CPU_LOAD=$(echo "scale=2; ${CPU_LOAD_SUM}/${CORES}" | bc -l)
42 
43 ${RRDTOOL} update ${RRDFILES}/${HOST}-cpu.rrd N:${CPU_LOAD}
44 
45 ${RRDTOOL} graph ${IMAGES}/${HOST}-cpu.png \
46 	--start -43200 \
47 	--title "${HOST} - ${VERSION} - CPU" \
48 	--vertical-label "% CPU Used" \
49 	--watermark "${WATERMARK}" \
50 	--color BACK#ffffff \
51 	--border 0 \
52 	DEF:CPU=${RRDFILES}/${HOST}-cpu.rrd:ds0:AVERAGE \
53 	AREA:CPU#FFCC00 \
54 	LINE2:CPU#CC0033:"CPU" \
55 	GPRINT:CPU:MAX:"Max\:%2.2lf %s" \
56 	GPRINT:CPU:AVERAGE:"Average\:%2.2lf %s" \
57 	GPRINT:CPU:LAST:" Current\:%2.2lf %s\n" \
58 	COMMENT:"\\n" \
59 	COMMENT:"  SUM CPU Load / Active Cores = % CPU Used\n" \
60 	COMMENT:"  Up for ${UPTIME} at ${NOW}"