#!/bin/bash

# Linux

ANZAHL="10"                             # Messzeit für vmstat, RX und TX
                                        # ${ANZAHL} x 3 = mind. Laufzeit dieses Scripts

TICKER="$(echo "${ANZAHL}" | awk '{print 3+$1}')"
VMSTAT="$(vmstat -a 1 ${TICKER} | tail -n1 | awk -v z=${ANZAHL} '{ab+=$1; bb+=$2; cb+=$3; db+=$4; eb+=$5; fb+=$6; gb+=$7; hb+=$8; ib+=$9; jb+=$10; kb+=$11; lb+=$12; mb+=$13; nb+=$14; ob+=$15; pb+=$16} END {print "number_of_processes_waiting_for_run_time="ab/z,"number_of_processes_in_uninterruptible_sleep="bb/z,"mem_swap_in_use="cb/z,"mem_free="db/z,"mem_inactive="eb/z,"mem_active="fb/z,"swap_read="gb/z,"swap_write="hb/z,"io_block_in="ib/z,"io_block_out="jb/z,"system_interrupts="kb/z,"system_context_switches_per_second="lb/z,"cpu_user_time="mb/z,"cpu_system_time="nb/z,"cpu_idle="ob/z,"cpu_waiting_for_io="pb/z}')"

RXBPS="$(RXB="$(cat /sys/class/net/eth*/statistics/rx_bytes | awk '{z=$1;s+=z}END{print s}')";sleep ${ANZAHL};echo "$(cat /sys/class/net/eth*/statistics/rx_bytes | awk '{z=$1;s+=z}END{print s}') $RXB" | awk -v z=${ANZAHL} '{print "byte_je_sekunde_empfangen="($1-$2)/z}')"

TXBPS="$(TXB="$(cat /sys/class/net/eth*/statistics/tx_bytes | awk '{z=$1;s+=z}END{print s}')";sleep ${ANZAHL};echo "$(cat /sys/class/net/eth*/statistics/tx_bytes | awk '{z=$1;s+=z}END{print s}') $TXB" | awk -v z=${ANZAHL} '{print "byte_je_sekunde_gesendet="($1-$2)/z}')"

echo "hostname=$(hostname -f) ${VMSTAT} ${RXBPS} ${TXBPS} apache_processes=$(ps -ef | egrep '^www-data.*apache2 -k start' | wc -l) $(uptime | awk '{gsub(",","");print "load_average_1="$(NF-2),"load_average_5="$(NF-1),"load_average_15="$(NF)}')" | tr -s ' ' '\n'