Monitor server CPU and memory.

resource_monitor.sh

#!/usr/bin/env bash

# settings
OUTPUT_FILE=monitor.csv

# build command
cmd=""
cpu_headers=""
for (( i=4; i<=$(nproc)+4; i++ ))
do
    cmd="${cmd}NR==$i{printf \"%.1f,\", 100-\$13}"
done
cmd="echo -n \`date +%s\`, && mpstat -P ALL 1 1 | awk '${cmd}' && uptime | awk 'NR==1{printf \"%.2f,\", \$8}' && free | awk 'NR==2{printf \"%s,%s\n\", \$3, \$2}'"

# print headers
cpu_headers=""
for (( i=1; i<=$(nproc); i++ ))
do
    cpu_headers="${cpu_headers}cpu_$i,"
done

echo "epoch,cpu_all,${cpu_headers}load,mem_used,mem_total"> $OUTPUT_FILE

# loop data
while true; do (eval $cmd) >> $OUTPUT_FILE;  done