smartgraphprobe - Probe HDDs via smartctl, export data as json, use jq to create a csv, then gnuplot to create a graph showing Power_on_time in years

smartgraphprobe.sh

#!/bin/bash
outfile=smart.csv
outgraph=smart.png
rm $outfile
array=('hosts=(root@host1 user@host2 userb@host3)' 'sudo=(root sudo sudo)' 'devices=(sdb,sdd sda,sdb,sdc sda,sdb)')
for j in "${array[@]}"; do eval $j; done
tmpfile=$(mktemp)
let i=0
for h in ${hosts[@]}
do
	sudo_or_not=${sudo["$i"]}
	for d in $(echo ${devices["$i"]} | xargs -d,)
	do
	   if [ $sudo_or_not == "sudo" ]; then
		ssh $h sudo smartctl -a /dev/$d -d sat -j > $tmpfile
	   else
		ssh $h smartctl -a /dev/$d -d sat -j > $tmpfile
	   fi
	   docker run -i stedolan/jq < $tmpfile  '.model_name,.device.name,.power_on_time.hours' | sed -z 's/\n/,/g;s/,$/\n/' >> $outfile
	done
	let i=$((i+1))
done
docker run --rm -v $(pwd):/work remuslazar/gnuplot -e \ "set datafile separator ','; set boxwidth 0.5; set style fill solid ; set output '$outgraph'; set terminal png ; set xtics rotate ; set ylabel 'years' ; set xlabel 'disk' ; set key noautotitle ; plot '$outfile' using (\$3/8670):xtic(1) with boxes"
rm $tmpfile