conditional-monitor.sh

#!/bin/sh -f
#=======================================================================================================
# This sample script show how to make a script take required action on given day of the week starting
# from a given hour during a period of certain minutes.
# e.g. monitor and collect data every Saturday night at 23:00 for 30 minutes.
#     and during other times, the script will not monitor.
#     this example allow the user to have alerts only during that time as well.
# the script is used with the following format:
# ./conditional-monitor.sh -d <day of the week> -h <start time> -p <period in minutes>
#        <day of the week>:      1..7 (MON=1, TUE=2 etc.)
#        <start time>:           00..23
#        <period in minutes>:    0 or larger
# when used within a policy make sure the arguments are provided.
# NOTICE: the same script can run on the same host during different days or periods
#         it's the arguments which count.
# When collecting data (at the right day of the week, and time of day), the sample monitor
# CPU and memory utilization of the server
#=======================================================================================================
DEBUG_FILE=$0.debug
RegEx='^[0-9]+$'
RexExFloating='^[0-9]+([.][0-9]+)?$'
TodayInTheWeek=`date +%w`
NowTimeEPOCH=`date +%s`
# expecting args
# Mem:  2059580 total 1984532 used 75048 free 8868 buffers
function setMemStats
{
 if [ "$5" = "used" ]; then
   memPct=`echo "scale=2;( $4 / $2 ) * 100.0" | bc`
 elif [ "$8" = "used" ]; then
   memPct=`echo "scale=2;( $7 / $3 ) * 100.0" | bc`
 else
   memPct=-1.0
 fi
}
# expecting args
# Cpu(s): 1.5us 0.3sy 0.1ni 95.4id 2.0wa 0.3hi 0.5si 0.0st
# or output like that:
# Cpu(s): 1.4 us 0.5 sy 0.0 ni 97.9 id 0.2 wa 0.0 hi 0.0 si 0.0 st
function setCpuStats
{
 if [[doc:xwiki:IT-Operations-Management.Operations-Management.BMC-PATROL-for-Scripting.script21.Using.Linux-environment.Using-sample-scripts-for-monitoring-Linux.conditional-monitor-sh. $4 = $RexExFloating ]]; then
   idPct=`echo $4 | sed 's/[^0-9.]*//g'`
 else
   idPct=-1.0
 fi
 cpuPct=`printf "100-%.2f\n" $idPct | bc`
}
function getStatistic
{
 for rawLine in $(top -b -n 1 | grep "Cpu(s):\|Mem :\|Mem:" | sed -e 's/,\|k\|%//g' -e 's/ /_/g')
 do
   line=`echo $rawLine | sed 's/_/ /g'`
   lineType=`echo $rawLine | cut -d ':' -f 1`
   if [ "$lineType" = "Mem" -o "$lineType" = "KiB_Mem_" ]; then
      setMemStats `echo $line | sed 's/[:\/\(\)]//g'`
   else
      setCpuStats `echo $line | sed 's/[a-z]\|[A-Z]\|[:\/\(\)]//g'`
   fi
 done
 if [ "$memPct" != "" -a "$cpuPct" != "" ]; then
   echo ServerLoad=ServerLoad,CPULoad=$cpuPct,MEMLoad=$memPct
   exit 0
 else
   exit -1
 fi
}
function dateConditionAction
{
 if [ $# -eq 2 ]; then
   StartTimeEPOCH=`date --date="$1" +%s`
   EndTimeeEPOCH=`echo $StartTimeEPOCH + $2*60 | bc`
   if [ $NowTimeEPOCH -ge $StartTimeEPOCH -a $NowTimeEPOCH -lt $EndTimeeEPOCH ]; then
      getStatistic
   else
     exit -1
   fi
 fi
}
if ! [[doc:xwiki:IT-Operations-Management.Operations-Management.BMC-PATROL-for-Scripting.script21.Using.Linux-environment.Using-sample-scripts-for-monitoring-Linux.conditional-monitor-sh. $# -eq 6 ]]; then
 echo -e "Usage: $0 -d <day of the week> -h <start time> -p <period in minutes>"
 echo -e "\t<day of the week>:\t1..7"
 echo -e "\t<start time>:\t\t00..23"
 echo -e "\t<period in minutes>:\t0 or larger"
 exit -1
fi
for arg in $*
do
 case $arg in
   "-d")
      ;;
   "-h")
      ;;
   "-p")
      ;;
    *)
     if [[doc:xwiki:IT-Operations-Management.Operations-Management.BMC-PATROL-for-Scripting.script21.Using.Linux-environment.Using-sample-scripts-for-monitoring-Linux.conditional-monitor-sh. $arg = $RegEx ]]; then
       case $prevArg in
         "-d")
           activeDay=$arg
            ;;
         "-h")
           activeHour=$arg:00
            ;;
         "-p")
           activePeriod=$arg
            ;;
       esac
     else
       echo arg=$arg
       echo "Invalid flag ignored"
     fi
      ;;
 esac
 prevArg=$arg
done
if [ $TodayInTheWeek -eq $activeDay ]; then
  dateConditionAction $activeHour $activePeriod
else
 exit 1
fi--