some small improvements and bugfixes

btw – the script is also compatible with esxi 5.x

#!/bin/bash
# Author Stefan Nonchev
# Nagios script for checking the number of existing snapshots and how old are these.
# The script should work with any ESXi 5.x
# Installation notes:
# On your nagios server execute:
#
# #sudo nagios
# #ssh-keygen
# copy the public certificate into /etc/ssh/keys-root/authorized_keys on each ESXi host that will be monitored

debug=1
sshparameter=””

print_usage() {
echo “”
echo “Usage: $0 [esxi_hostname] [warn] [crit] [snapage]”
echo “where”
echo “- [warn] and [crit] are the allowed numbers of all snapshots (summarized)”
echo “- [snapage] is how old a snapshot is allowed to be (days)”
exit 3
}

case “$1” in
–help)
print_usage
;;
-h)
print_usage
;;
esac

if [ “$#” -ne “4” ]; then
print_usage
fi

function date2stamp () {
date –utc –date “$1″ +%s
}

function dateDiff () {
sec=86400
dte1=$(date2stamp $1)
dte2=$(date2stamp $2)
diffSec=$((dte2-dte1))
if ((diffSec $4 days ) snapshots on: $vmstr”
exit 2
fi

if [ $total -le $warn ] ; then
echo “OK – $total snapshots found (warn=$warn)”
exit 0
fi

if [ $total -ge $crit ] ; then
echo “CRITICAL – $total snapshots found (crit=$crit)”
exit 2
fi

if [ $total -ge $warn ] ; then
echo “WARN – $total snapshots found (warn=$warn)”
exit 1
fi