此文主要讲述了cacti利用snmpdiskio 监控服务器磁盘 IO的方法，cacti的安装这里不再累述
环境
cacti-0.8.7g
snmpdiskio-0.9.6
安装步骤
监控机上操作：
1.将下载的snmpdiskio-0.9.4.tar.gz上传到cacit服务器上,解压缩,将partition.xml拷
贝resource/snmp_queries下.
# tar xvf snmpdiskio-0.9.4.tar.gz
# cd snmpdiskio-0.9.4
# cp partition.xml ../cacti/resource/snmp_queries/
2.在cacti服务器的web界面下导入cacti_graph_template_disk_io_bytessec.xml模板
如图所示：
被监控机上操作：
1.将下载的snmpdiskio-0.9.4.tar.gz上传到被监控机上,解压缩,将目录下可执行文件
snmpdisk拷贝/usr/local/bin/下
# tar xvf snmpdiskio-0.9.4.tar.gz
# cd snmpdiskio-0.9.4
# cp snmpdiskio /usr/local/bin/
注：如果监控机也需要检测磁盘IO的话，做同样处理
2.由于9.4太老不支持2.6内核,需要修改,出自
中dverlaeckt 的“code”
# vim /usr/local/bin/snmpdiskio
#!/bin/bash
# $Id: snmpdiskio,v 1.5 /01/31 21:19:50 dverlaeckt Exp $
# snmpdiskio v0.9.6 (c) Dieter Verlaeckt # snmpdiskio v0.9.5 (c) Pablo Destefanis # snmpdiskio v0.9.4 (c) Mikael Fridh # Fields in /proc/partitions (kernel 2.4)
# major minor #blocks name rio rmerge rsect ruse wio wmerge wsect wuse running
use aveq
# Fields in /proc/diskstats (kernel 2.6) for disks (i.e. hda)
# major minor name rio rmerge rsect ruse wio wmerge wsect wuse running use
aveq
# Fields in /proc/diskstats (kernel 2.6) for partitions (i.e. hda1)
# major minor name rio rsect wio wsect
# InBlocks = sectors written to disk
# OutBlocks = sectors read from disk
# Set default procfile for kernel 2.4
PROCFILE="/proc/partitions"
MODE="linux24"
# Probably kernel 2.6:
if [ -f /proc/diskstats ]; then
PROCFILE=/proc/diskstats
MODE="linux26"
fi
function hdNum()
{
awk ' BEGIN { num=0 } $1 ~ /[0-9]+/ && $2 ~ /[0-9]+/ { num++ } END {
print num } ' $PROCFILE
}
function hdIndex()
{
awk ' BEGIN { num=0 } $1 ~ /[0-9]+/ && $2 ~ /[0-9]+/ { num++; print
num } ' $PROCFILE
}
function hdDescr()
{
if [ "$MODE" = "linux26" ]; then
awk ' $1 ~ /[0-9]+/ && $2 ~ /[0-9]+/ { printf "%s\n", $3 }'
$PROCFILE
else
awk ' $1 ~ /[0-9]+/ && $2 ~ /[0-9]+/ { printf "%s\n", $4 }'
$PROCFILE
fi
}
function hdInBlocks()
{
if [ "$MODE" = "linux26" ]; then
awk ' $1 ~ /[0-9]+/ && $2 ~ /[0-9]+/ && NF == 7 { printf
"%.0f\n", $7 * 512 }
$1 ~ /[0-9]+/ && $2 ~ /[0-9]+/ && NF == 14 { printf
"%.0f\n", $10 * 512 } ' $PROCFILE
else
awk ' $1 ~ /[0-9]+/ && $2 ~ /[0-9]+/ && NF == 15 { printf
"%.0f\n", $11 * 512 } ' $PROCFILE
fi
}
function hdOutBlocks()
{
if [ "$MODE" = "linux26" ]; then
awk ' $1 ~ /[0-9]+/ && $2 ~ /[0-9]+/ && NF == 7 { printf
"%.0f\n", $5 * 512 }
$1 ~ /[0-9]+/ && $2 ~ /[0-9]+/ && NF == 14 { printf
"%.0f\n", $6 * 512 } ' $PROCFILE
else
awk ' $1 ~ /[0-9]+/ && $2 ~ /[0-9]+/ && NF == 15 { printf
"%.0f\n", $7 * 512 } ' $PROCFILE
fi
}
function usage()
{
cat
}
if [ 1 -ne $# ]; then
usage
exit 1
fi
case $1 in
hdNum|hdIndex|hdDescr|hdInBlocks|hdOutBlocks)
$1
;;
'hdNum')
hdNum
;;
'hdIndex')
hdIndex
;;
'hdDescr')
hdDescr
;;
'hdInBlocks')
hdInBlocks
;;
'hdOutBlocks')
hdOutBlocks
;;
*)
usage
exit 1
;;
esac
exit 0
3.修改snmpd.conf配置文件，添加以下内容
exec .1.3.6.1.4.1..54 hdNum /usr/local/bin/snmpdiskio hdNum
exec .1.3.6.1.4.1..55 hdIndex /usr/local/bin/snmpdiskio hdIndex
exec .1.3.6.1.4.1..56 hdDescr /usr/local/bin/snmpdiskio hdDescr
exec .1.3.6.1.4.1..57 hdInBlocks /usr/local/bin/snmpdiskio hdInBlocks
exec .1.3.6.1.4.1..58 hdOutBlocks /usr/local/bin/snmpdiskio hdOutBlocks
4.重启snmp服务
# service snmpd restart
5.测试，正常会出现如下内容
# snmpwalk -v 2c -c public 192.168.88.128 .1.3.6.1.4.1..58
UCD-SNMP-MIB::ucdavis.58.1.1 = INTEGER: 1
UCD-SNMP-MIB::ucdavis.58.2.1 = STRING: "hdOutBlocks"
UCD-SNMP-MIB::ucdavis.58.3.1 = STRING: "/usr/local/bin/snmpdiskio hdOutBlocks"
UCD-SNMP-MIB::ucdavis.58.100.1 = INTEGER: 0
UCD-SNMP-MIB::ucdavis.58.101.1 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.2 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.3 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.4 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.5 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.6 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.7 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.8 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.9 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.10 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.11 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.12 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.13 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.14 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.15 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.16 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.17 = STRING: "1666025984"
UCD-SNMP-MIB::ucdavis.58.101.18 = STRING: "1154048"
UCD-SNMP-MIB::ucdavis.58.101.19 = STRING: "1278602240"
UCD-SNMP-MIB::ucdavis.58.101.20 = STRING: "386118144"
UCD-SNMP-MIB::ucdavis.58.101.21 = STRING: "1277166592"
UCD-SNMP-MIB::ucdavis.58.101.22 = STRING: "1270784"
UCD-SNMP-MIB::ucdavis.58.101.23 = STRING: "73728"
UCD-SNMP-MIB::ucdavis.58.101.24 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.101.25 = STRING: "0"
UCD-SNMP-MIB::ucdavis.58.102.1 = INTEGER: 0
UCD-SNMP-MIB::ucdavis.58.103.1 = ""
现在，添加设备
Devices-->Add，在Associated Data Queries选择SNMP - Disk Statistics ，如图
接下来*Create Graphs for this Host，如图
获得图像如下
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