Nagios监控内存脚本
1. 脚本如下 check_mem.sh # Script to check real memory usage# L.Gill 02/05/06 - V.1.0
# ------------------------------------------
# ########Script Modifications##########
# ------------------------------------------
# Who When What
# --- ---- ----
# LGill 17/05/06"$percent" lt 1% fix - sed edits dc result beggining with "."
#
#
#!/bin/bash
USAGE="`basename $0` [-w|--warning] [-c|--critical]"
THRESHOLD_USAGE="WARNING threshold must be greater than CRITICAL: `basename $0` $*"
calc=/tmp/memcalc
percent_free=/tmp/mempercent
critical=""
warning=""
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
# print usage
if [[ $# -lt 4 ]]
then
echo ""
echo "Wrong Syntax: `basename $0` $*"
echo ""
echo "Usage: $USAGE"
echo ""
exit 0
fi
# read input
while [[ $# -gt 0 ]]
do
case "$1" in
-w|--warning)
shift
warning=$1
;;
-c|--critical)
shift
critical=$1
;;
esac
shift
done
# verify input
if [[ $warning -eq $critical || $warning -lt $critical ]]
then
echo ""
echo "$THRESHOLD_USAGE"
echo ""
echo "Usage: $USAGE"
echo ""
exit 0
fi
# Total memory available
total=`free -m | head -2 |tail -1 |gawk '{print $2}'`
# Total memory used
used=`free -m | head -2 |tail -1 |gawk '{print $3}'`
# Calc total minus used
free=`free -m | head -2 |tail -1 |gawk '{print $2-$3}'`
# normal values
#echo "$total"MB total
#echo "$used"MB used
#echo "$free"MB free
# make it into % percent free = ((free mem / total mem) * 100)
echo "5" > $calc # decimal accuracy
echo "k" >> $calc # commit
echo "100" >> $calc # multiply
echo "$free" >> $calc # division integer
echo "$total" >> $calc # division integer
echo "/" >> $calc # division sign
echo "*" >> $calc # multiplication sign
echo "p" >> $calc # print
percent=`/usr/bin/dc $calc|/bin/sed 's/^\./0./'|/usr/bin/tr "." " "|/usr/bin/gawk {'print $1'}`
#percent1=`/usr/bin/dc $calc`
#echo "$percent1"
if [[ "$percent" -le$critical ]]
then
echo "CRITICAL - $free MB ($percent%) Free Memory"
exit 2
fi
if [[ "$percent" -le$warning ]]
then
echo "WARNING - $free MB ($percent%) Free Memory"
exit 1
fi
if [[ "$percent" -gt$warning ]]
then
echo "OK - $free MB ($percent%) Free Memory"
exit 0
fi
2. modify /usr/local/nagios/etc/command.cfg
# 'check_mem' command definition
define command{
command_name check_mem
command_line $USER1$/check_mem.sh -H $HOSTADDRESS$ -w $ARG1$ -c $ARG2$ -p $ARG1$
}
3. define service{
use generic-service ; Name of service template to use
host_name 192.168.31.130
service_description check_mem
is_volatile 0
check_period 24x7
max_check_attempts 4
normal_check_interval 5
retry_check_interval 1
contact_groups nagios
notification_options w,u,c,r
notification_interval 960
notification_period 24x7
check_command check_mem!20!5
}
4.以上可以监控本地的内存。
5.这是网上找的内存监控脚本，从脚本看，作者并不了解linux内存的使用原理，LINUX平的有效内存不是看第二行，而是看第三行,需要对脚本修改
另外怎样查看其他机器的内存使用情况 ？
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