【移動應(yīng)用開發(fā)技術(shù)】nagios 監(jiān)控 網(wǎng)卡流量 腳本

【移動應(yīng)用開發(fā)技術(shù)】nagios監(jiān)控網(wǎng)卡流量腳本

#!/bin/bash

#

#Time

:

2014-06-23

#Author

:

ftlynx

#Function

:

use

NET-SNMP

get

NIC

traffic

on

nagios.

Usage(){

echo

"Usage:

check_traffic.sh

[options]"

echo

"

-H

Host

IP."

echo

"

-P

net-snmp

community

string."

echo

"

-N

NIC

desc."

echo

"

-W

nagios

warning

value.

Format:

200,300.

200

is

in

traffic.

300

is

out

traffic.

unit:Kb.

Default:

5000,5000"

echo

"

-C

nagios

crit

value.

Reference

-W.

Default:

10000,10000"

echo

"

-V

net-snmp

version.

Default

2c."

exit

2

}

DefaultValue(){

if

[

-z

"$IP"

-o

-z

"$nicdesc"

-o

-z

"$community"

];then

echo

-e

"Error:Parameter

not

enough.\n"

Usage

fi

if

[

-z

"$warn"

];then

warn="5000,5000"

fi

if

[

-z

"$crit"

];then

crit="10000,10000"

fi

if

[

-z

"$version"

];then

version=2c

fi

}

GetResult(){

while

[

1

]

do

index=`snmpwalk

-v

$version

-c

$community

$IP

IF-MIB::ifDescr

|

grep

"${nicdesc}$"

|awk

-F

'.'

'{print

$2}'

|awk

'{print

$1}'`

if

[

$?

-ne

0

];then

echo

"Error:

snmpwalk

wrong."

exit

2

fi

if

[

-z

"$index"

];then

continue

else

break

fi

done

tempfile="/tmp/traffic.${IP}-$index"

while

[

1

]

do

if

[

-f

"$tempfile"

];then

value=`cat

$tempfile`

last_time=`echo

"$value"

|

awk

'{print

$1}'`

last_in_traffic=`echo

"$value"

|awk

'{print

$2}'`

last_out_traffic=`echo

"$value"

|awk

'{print

$3}'`

now_time=`date

+%s`

now_in_traffic=`snmpwalk

-v

$version

-c

$community

$IP

IF-MIB::ifInOctets.${index}

|awk

'{print

$NF}'`

now_out_traffic=`snmpwalk

-v

$version

-c

$community

$IP

IF-MIB::ifOutOctets.${index}

|awk

'{print

$NF}'`

if

[

-z

"$now_in_traffic"

-o

-z

"$now_out_traffic"

];then

sleep

10

continue

fi

in_traffic=$(($now_in_traffic

-

$last_in_traffic))

out_traffic=$(($now_out_traffic

-

$last_out_traffic))

second=$(($now_time

-

$last_time))

else

now_time=`date

+%s`

now_in_traffic=`snmpwalk

-v

$version

-c

$community

$IP

IF-MIB::ifInOctets.${index}

|awk

'{print

$NF}'`

now_out_traffic=`snmpwalk

-v

$version

-c

$community

$IP

IF-MIB::ifOutOctets.${index}

|awk

'{print

$NF}'`

if

[

-z

"$now_in_traffic"

-o

-z

"$now_out_traffic"

];then

sleep

10

continue

fi

in_traffic=0

out_traffic=0

fi

echo

"$now_time

$now_in_traffic

$now_out_traffic"

>

$tempfile

if

[

$?

-ne

0

];then

echo

"$tempfile

write

fail."

exit

2

fi

if

[

$in_traffic

-le

0

-o

$out_traffic

-le

0

];then

sleep

10

continue

else

in_result=$(($in_traffic

/

$second

/

1024

*

8))

out_result=$(($out_traffic

/

$second

/

1024

*

8))

break

fi

done

#warn

vaule

in_warn=`echo

$warn

|awk

-F

','

'{print

$1}'`

out_warn=`echo

$warn

|awk

-F

','

'{print

$2}'`

#crit

value

in_crit=`echo

$crit

|

awk

-F

','

'{print

$1}'`

out_crit=`echo

$crit

|

awk

-F

','

'{print

$2}'`

echo

"IN:

${in_result}Kbps[${in_warn}Kbps][${in_crit}Kbps]

OUT:

${out_result}Kbps[${out_warn}Kbps][${out_crit}Kbps]

|

IN=${in_result}Kb;

OUT=${out_result}Kb;"

if

[

$in_result

-ge

$in_crit

-o

$out_result

-ge

$out_crit

];then

exit

2

fi

if

[

$in_result

-ge

$in_warn

-o

$out_result

-ge

$out_warn

];then

exit

1

fi

exit

0

}

while

getopts

H:P:N:W:C:V:

args

do

case

$args

in

H)

IP="$OPTARG"

;;

P)

community="$OPTARG"

;;

W)

warn="$OPTARG"

;;

C)

crit="$OPTARG"

;;

V)

version="$OPTARG"

;;

N)

nicdesc="$OPTARG"

;;

?)

Usage

esac

done

DefaultValue

GetResult需要注意的地方：使用IF-MIB::ifDescr，使用網(wǎng)卡名稱來獲取網(wǎng)卡對應(yīng)的索引值，然后使用IF-MIB::ifInOctets.{index}和IF-MIB::ifOutOctets.{index}來獲取網(wǎng)卡的進(jìn)出流量。使用snmpwalk-v2c-cpublic

IF-MIB::ifDescr來查看有哪些接口，找到自己對應(yīng)的。要保證使用snmpwalk能抓取到數(shù)據(jù)。所以腳本中使用死循環(huán)來判斷。由于使用的snmp的32位計(jì)數(shù)器，所以當(dāng)達(dá)到最大值時(shí)，計(jì)數(shù)器會從頭開始。這樣取兩次間隔時(shí)會出現(xiàn)負(fù)數(shù)，所以腳本中有判斷兩次間隔的值一定要大于0。同時(shí)使用sleep10來延遲10秒再取值，同時(shí)這個(gè)間隔時(shí)間最好不要小于10s,因?yàn)槭褂胹nmpwalk抓取數(shù)據(jù)時(shí)，間隔太小會導(dǎo)致抓取到的值是一樣的。臨時(shí)文件的權(quán)限，如果先手動運(yùn)行就會就root用戶，導(dǎo)致放在naigos中的時(shí)候不能寫臨時(shí)文件。被監(jiān)控機(jī)要安裝snmp服務(wù)。本腳本實(shí)用于linux和windows。同時(shí)滿足pnp4nagios的繪圖。當(dāng)然要自己定義模板（見下面）

本人使用：定義nagiso命令：define

command{

command_name

check_traffic

command_line

$USER1$/check_traffic.sh

-H

$HOSTADDRESS$

-P

$ARG1$

-W

$ARG2$

-C

$ARG3$

-N

$ARG4$

#ARG1

is

snmp-community;

ARG2

is

warn;

ARG3

is

crit;

ARG4

is

NIC

Name

}定義nagios服務(wù)：windows的define

service{

use

XXX

host_name

XXX

service_description

wan_traffic

check_command

check_traffic!public!5000,5000!9000,9000!"Net

Device

PV

Driver

#2"

}linux的define

service{

use

XXX

host_name

XXX

service_description

wan_traffic

check_command

check_traffic!public!10000,12000!14000,14000!eth2

}pnp4nagios的模板[root@nagios

pnp4nagios]#

cat

share/templates/check_traffic.php

<?php

#

##

Copyright

(c)

2006-2010

Joerg

Linge

()

##

Plugin:

check_iftraffic.pl

(COUNTER)

#

$opt[1]

=

"--vertical-label

\"Traffic\"

-b

1024

--title

\"Interface

Traffic

for

$hostname

/

$servicedesc\"

";

$def[1]

=

"DEF:var1=$RRDFILE[1]:$DS[1]:AVERAGE

"

;

$def[1]

.=

"DEF:var2=$RRDFILE[2]:$DS[2]:AVERAGE

"

;

$def[1]

.=

"LINE1:var1#003300:\"in\"

"

;

$def[1]

.=

"GPRINT:var1:LAST:\"%7.2lf

%SKb/s

last\"

"

;

$def[1]

.=

"GPRINT:var1:AVERAGE:\"%7.2lf

%SKb/s

avg\"