print out the mem and cpu used by a process (or multiple processes with the same name) for munin

binstat

#!/bin/bash

function get_cpu_usage() {
  cpu=`ps auwx|grep "$1"|grep -v 'grep'|tr -s ' ' ' ' | cut -d' ' -f3|awk '{s+=$1}END{print s}' `;
}

function get_mem_usage() {
  mem=`ps auwx|grep "$1"|grep -v 'grep'|tr -s ' ' ' ' | cut -d' ' -f4|awk '{s+=$1}END{print s}' `;
}

function get_io_usage() {
  
  iotmp="/tmp/$1.io";
  pids=`ps auwx|grep "$1"|grep -v 'grep'|tr -s ' ' ' ' | cut -d' ' -f2`;
  echo -n "" > $iotmp;
  for pid in $pids; do
    pidstat -d -p $pid 1 1|grep Average|tr -s ' ' ' ' |cut -d' ' -f3-4 >> $iotmp;
  done;

  kbrs=`cat $iotmp|cut -d' ' -f1|awk '{s+=$1}END{print s}'`;
  kbws=`cat $iotmp|cut -d' ' -f2|awk '{s+=$1}END{print s}'`;
}

function print_values() {
  echo "mem.value $mem";
  echo "cpu.value $cpu";
  echo "kbrs.value $kbrs";
  echo "kbws.value $kbws";
}

function print_fields() {
  echo graph_args -l 0
  echo graph_category system
  echo graph_title Process Statistics;
  echo graph_info Information on the process
  echo graph_vlabel;
  echo mem.label Memory %;
  echo cpu.label CPU %;
  echo kbrs.label IO Read kB/s;
  echo kbrs.label IO Write kB/s;
}

case $1 in
  config)
    print_fields;
    exit 0;;
esac

get_cpu_usage apache2
get_mem_usage apache2
get_io_usage apache2
print_values;