【移动应用开发技术】利用zabbix动态监控磁盘IO

【移动应用开发技术】利用zabbix动态监控磁盘IO

最近在看LinuxI/O子系统相关的资料，需要监控每台服务器的磁盘I/O，特别是MongoDB数据库服务器的磁盘I/O，由于每台服务器的磁盘名称可能不一样，所以需要用到Zabbix的LLD功能来发现磁盘并监控I/O参考文章/a/MDOwYDNwATc.html编写发现磁盘的脚步shell版本disk_discovery.sh

#!/bin/bash

diskarray=(`cat

/proc/diskstats

|grep

-E

"\bsd[a-z]\b|\bxvd[a-z]\b|\bvd[a-z]\b"|awk

'{print

$3}'|sort|uniq

2>/dev/null`)

length=${#diskarray[@]}

printf

"{\n"

printf

'\t'"\"data\":["

for

((i=0;i<$length;i++))

do

printf

'\n\t\t{'

printf

"\"{#DISK_NAME}\":\"${diskarray[$i]}\"}"

if

[

$i

-lt

$[$length-1]

];then

printf

','

fi

done

printf

"\n\t]\n"

printf

"}\n"

$

sh

disk_discovery.sh

{

"data":[

{"{#DISK_NAME}":"xvda"},

{"{#DISK_NAME}":"xvdb"}

]

}

python版本disk_discovery.py#/usr/bin/python

#This

script

is

used

to

discovery

disk

on

the

server

import

subprocess

import

json

args="cat

/proc/diskstats

|grep

-E

'\ssd[a-z]\s|\sxvd[a-z]\s|\svd[a-z]\s'|awk

'{print

$3}'|sort|uniq

2>/dev/null"

t=subprocess.Popen(args,shell=True,stdout=subprocess.PIPE).communicate()[0]

disks=[]

for

disk

in

t.split('\n'):

if

len(disk)

!=

0:

disks.append({'{#DISK_NAME}':disk})

print

json.dumps({'data':disks},indent=4,separators=(',',':'))

$

python

disk_discovery.py

{

"data":[

{

"{#DISK_NAME}":"xvda"

},

{

"{#DISK_NAME}":"xvdb"

}

]

}2.编写获取磁盘I/O信息的脚本使用iostat收集磁盘I/O信息nohup/usr/bin/iostat-dxkt1

>/tmp/iostat_output2>/dev/null&#/bin/sh

device=$1

item=$2

case

$item

in

rrqm)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"|tail

-1|awk

'{print

$2}'

;;

wrqm)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"|tail

-1|awk

'{print

$3}'

;;

rps)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"|tail

-1|awk

'{print

$4}'

;;

wps)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"

|tail

-1|awk

'{print

$5}'

;;

rKBps)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"

|tail

-1|awk

'{print

$6}'

;;

wKBps)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"

|tail

-1|awk

'{print

$7}'

;;

avgrq-sz)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"

|tail

-1|awk

'{print

$8}'

;;

avgqu-sz)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"

|tail

-1|awk

'{print

$9}'

;;

await)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"

|tail

-1|awk

'{print

$10}'

;;

svctm)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"

|tail

-1|awk

'{print

$11}'

;;

util)

/usr/bin/tail

-n20

/tmp/iostat_output

|grep

"\b$device\b"

|tail

-1|awk

'{print

$12}'

;;

esac3.修改Zabbixagent配置文件

添加disk_status.conf

###

Option:

UserParameter

#

User-defined

parameter

to

monitor.

There

can

be

several

user-defined

parameters.

#

Format:

UserParameter=<key>,<shell

command>

#

See

'zabbix_agentd'

directory

for

examples.

#

#

Mandatory:

no

#

Default:

#

UserParameter=

UserParameter=disk.discovery,/usr/bin/python

/usr/local/zabbix/bin/disk_discovery.py

UserParameter=disk.status[*],/usr/local/zabbix/bin/disk_status.sh

$1

$2

然后重新加载zabbixagent4.通过在zabbixserver或zabbixproxy端使用zabbix_get获取磁盘信息

$

/usr/local/zabbix/bin/zabbix_get

-s

90

-p

10055

-k

"disk.discovery"

{

"data":[

{

"{#DISK_NAME}":"xvda"

},

{

"{#DISK_NAME}":"xvdb"

},

{

"{#DISK_NAME}":"xvdc"

}

]

}

$

/usr/local/zabbix/bin/zabbix_get

-s

90

-p

10055

-k

"disk.sta