#!/bin/bash

cores=$( grep -c processor /proc/cpuinfo )

# verbose mode
tgtf=/mnt/csc-cloud/vm_state/${HOSTNAME}.long
# debug
if [ -z "$1" ]
then touch "$tgtf"
fi
if [ -f "$tgtf" ]
then echo "======== $HOSTNAME =======" > "$tgtf"
     TZ="Europe/Helsinki" uptime >> "$tgtf"
     echo "Cores: $cores" >> "$tgtf"
     free -tg | head -n 2 >> "$tgtf"
     ps a --format user| grep -v -e root -e USER | sort -u | tr '\n' ' ' >> "$tgtf"
     echo "" >> "$tgtf"
fi

# concise mode

tgtf=/mnt/csc-cloud/vm_state/${HOSTNAME}.short
# debug
if [ -z "$1" ]
then touch "$tgtf"
fi
if [ -f "$tgtf" ]
then echo -n "|$HOSTNAME L:" > "$tgtf"
     load=$( cat /proc/loadavg | cut -d" " -f3 | tr  -d [:cntrl:] )  
     echo -n "$load/$cores M:" >> "$tgtf"
     # used + cached = total - free 
     free=$(( $( grep ^MemFree /proc/meminfo | tr -d -c [:digit:] ) / 1048576  ))
     cache=$(( $( grep ^Cached /proc/meminfo | tr -d -c [:digit:] ) / 1048576  ))
     total=$(( $( grep ^MemTotal /proc/meminfo | tr -d -c [:digit:] ) / 1048576  ))
     used=$(( $total -$free -$cache ))
     echo -n "$used+$cache/$total U:" >> "$tgtf" 
     ps a --format user| grep -v -e root -e USER | sort -u | wc -l | tr -c -d [:digit:] >> "$tgtf"
     TZ="Europe/Helsinki" date "+ @%H:%M" >> "$tgtf" 
# save history
     echo -e "$HOSTNAME\t$load\t$used\t"$( date +%s ) >> /mnt/csc-cloud/vm_state/history/${HOSTNAME}
fi