1 #!/bin/sh
2 #
3 # THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
4 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
5 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
6 # ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
7 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
8 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
9 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
10 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
11 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
12 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
13 # SUCH DAMAGE.
14 #
15 test -n "$1" || exit 1
16 HOST="$1"
17 COMMUNITY="public"
18 RRDFILES="/var/rrdtool"
19 IMAGES="/var/www/htdocs"
20 RRDTOOL="/usr/local/bin/rrdtool"
21 CPUINFO="/tmp/${HOST}-cpu.txt"
22 UPTIME=$(cat /tmp/${HOST}-uptime.txt)
23 NOW=$(date "+%Y-%m-%d %H:%M:%S %Z" | sed 's/:/\\:/g')
24 
25 if ! test -f "${RRDFILES}/${HOST}-cpu.rrd"
26 then
27 echo "Creating ${RRDFILES}/${HOST}-cpu.rrd"
28 ${RRDTOOL} create ${RRDFILES}/${HOST}-cpu.rrd \
29 	--step 300 \
30 	DS:ds0:GAUGE:600:U:U \
31 	RRA:MAX:0.5:1:20000
32 fi
33 
34 snmpctl snmp walk ${HOST} community ${COMMUNITY} oid hrProcessorLoad | cut -d= -f2 > ${CPUINFO}
35 CORES=$(grep -cv "^0$" ${CPUINFO})
36 CPU_LOAD_SUM=$(awk '{sum += $1} END {print sum}' ${CPUINFO})
37 CPU_LOAD=$(echo "scale=2; ${CPU_LOAD_SUM}/${CORES}" | bc -l)
38 
39 ${RRDTOOL} update ${RRDFILES}/${HOST}-cpu.rrd N:${CPU_LOAD}
40 
41 ${RRDTOOL} graph ${IMAGES}/${HOST}-cpu.png \
42 	--start -43200 \
43 	--title "${HOST} - CPU" \
44 	--vertical-label "% CPU Used" \
45 	--watermark "OpenBSD Amsterdam - https://obsda.ms" \
46 	DEF:CPU=${RRDFILES}/${HOST}-cpu.rrd:ds0:AVERAGE \
47 	AREA:CPU#FFCC00 \
48 	LINE2:CPU#CC0033:"CPU" \
49 	GPRINT:CPU:MAX:"Max\:%2.2lf %s" \
50 	GPRINT:CPU:AVERAGE:"Average\:%2.2lf %s" \
51 	GPRINT:CPU:LAST:" Current\:%2.2lf %s\n" \
52 	COMMENT:"\\n" \
53 	COMMENT:"  SUM CPU Load / Active Cores = % CPU Used\n" \
54 	COMMENT:"  Up for ${UPTIME} at ${NOW}"