check_joyent_zone_mem

#!/bin/bash
# ========================================================================================
# Joyent Zone Memory Plugin for Nagios based on jinf/sm-meminfo utility
#
# Wanelo Inc, Apache License.
#
# Usage: ./check_joyent_zone_mem  [-w <warn_perc>] [-c <critical_perc>]
# Eg:    ./check_joyent_zone_mem  -w 60 -c 80   # warning at 60% or higher used, critical at 80%
# ========================================================================================

# Nagios return codes
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3

if [ -f "/opt/local/bin/sm-meminfo" ]; then
  MEM_CMD="sm-meminfo -p rss"
else
  MEM_CMD="jinf -p -m"
fi

WARNING_THRESHOLD=70
CRITICAL_THRESHOLD=85
# Parse parameters
while [ $# -gt 0 ]; do
    case "$1" in
        -w | --warning)
                shift
                WARNING_THRESHOLD=$1
                ;;
        -c | --critical)
                shift
                CRITICAL_THRESHOLD=$1
                ;;
        *)  echo "Unknown argument: $1"
            exit $STATE_UNKNOWN
            ;;
        esac
shift
done

PATH=/opt/local/bin:$PATH
read TOTAL_MEM USED_MEM FREE_MEM <<< $($MEM_CMD | grep mem_ | cut -f 2 -d ':')
RSS=$(($USED_MEM * 100 / $TOTAL_MEM))
RSS_FREE=$(($FREE_MEM / (1024 * 1024)))
NODENAME=`cat /etc/nodename`

function result {
  DESCRIPTION=$1
  STATUS=$2
  echo "RSS $DESCRIPTION : ${NODENAME} ${RSS}% used (${RSS_FREE}Mb free)|rss=${RSS}%;${WARNING_THRESHOLD};${CRITICAL_THRESHOLD}"
  exit $STATUS
}

if [ $RSS -ge $WARNING_THRESHOLD ] && [ $RSS -lt $CRITICAL_THRESHOLD ]; then
  result "WARNING" $STATE_WARNING
elif [ $RSS -ge $CRITICAL_THRESHOLD ]; then
  result "CRITICAL" $STATE_CRITICAL
else
  result "OK" $STATE_OK
fi