cacti利用snmpdiskio 监控服务器磁盘IO监控
平台CentOS5.4
cacti-0.8.7e(cacti-0.8.7g已经测试安装正常)
snmpdiskio-0.9.6
安装
安装cacti平台就不提了,网上多得是,今天主要是如何添加disk io监控的模板.
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 zxvf snmpdiskio-0.9.4.tar.gz
cp snmpdiskio-0.9.4 /usr/local/apache2/htdocs/cacti/resource/snmp_queries/
2. 在cacti服务器的web界面下导入cacti_data_query_snmp_disk_statistics.xml和cacti_graph_template_disk_io_bytessec.xml
3. 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 zxvf snmpdiskio-0.9.4.tar.gz
install -m 0755 -o root -g root -p -v snmpdiskio /usr/local/bin/,
由于9.4太老不支持2.6内核,需要修改,出自http://forums.cacti.net/viewtopic.php?p=124793#124793 中dverlaeckt 的“code”
Vim snmpdiskio
#!/bin/bash
# $Id: snmpdiskio,v 1.5 2008/01/31 21:19:50 dverlaeckt Exp $
# snmpdiskio v0.9.6 (c) 2008 Dieter Verlaeckt <dieter.verlaeckt@gmail.com>
# snmpdiskio v0.9.5 (c) 2007 Pablo Destefanis <pdestefanis@gmail.com>
# snmpdiskio v0.9.4 (c) 2006 Mikael Fridh <mikael@meanstreak.se>
# 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 ~ /+/ && $2 ~ /+/ { num++ } END { print num } ' $PROCFILE
}
function hdIndex()
{
awk ' BEGIN { num=0 } $1 ~ /+/ && $2 ~ /+/ { num++; print num } ' $PROCFILE
}
function hdDescr()
{
if [ "$MODE" = "linux26" ]; then
awk ' $1 ~ /+/ && $2 ~ /+/ { printf "%s/n", $3 }' $PROCFILE
else
awk ' $1 ~ /+/ && $2 ~ /+/ { printf "%s/n", $4 }' $PROCFILE
fi
}
function hdInBlocks()
{
if [ "$MODE" = "linux26" ]; then
awk ' $1 ~ /+/ && $2 ~ /+/ && NF == 7 { printf "%.0f/n", $7 * 512 }
$1 ~ /+/ && $2 ~ /+/ && NF == 14 { printf "%.0f/n", $10 * 512 } ' $PROCFILE
else
awk ' $1 ~ /+/ && $2 ~ /+/ && NF == 15 { printf "%.0f/n", $11 * 512 } ' $PROCFILE
fi
}
function hdOutBlocks()
{
if [ "$MODE" = "linux26" ]; then
awk ' $1 ~ /+/ && $2 ~ /+/ && NF == 7 { printf "%.0f/n", $5 * 512 }
$1 ~ /+/ && $2 ~ /+/ && NF == 14 { printf "%.0f/n", $6 * 512 } ' $PROCFILE
else
awk ' $1 ~ /+/ && $2 ~ /+/ && NF == 15 { printf "%.0f/n", $7 * 512 } ' $PROCFILE
fi
}
function usage()
{
cat <<-EOUSAGE
Usage: $0 <hdNum|hdIndex|hdDescr|hdInBlocks|hdOutBlocks>
EOUSAGE
}
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
4. 修改被监控机的snmpd.conf,在文件的结尾添加如下:
exec .1.3.6.1.4.1.2021.54 hdNum /bin/sh /usr/local/bin/snmpdiskio hdNum
exec .1.3.6.1.4.1.2021.55 hdIndex /bin/sh /usr/local/bin/snmpdiskio hdIndex
exec .1.3.6.1.4.1.2021.56 hdDescr /bin/sh /usr/local/bin/snmpdiskio hdDescr
exec .1.3.6.1.4.1.2021.57 hdInBlocks /bin/sh /usr/local/bin/snmpdiskio hdInBlocks
exec .1.3.6.1.4.1.2021.58 hdOutBlocks /bin/sh /usr/local/bin/snmpdiskio hdOutBlocks
这里增加了/bin/sh,我在网上搜索了许多,都没有加上这个,我测试就是不成功.
Service snmpd restart
测试
snmpwalk -v 2c -c public localhost .1.3.6.1.4.1.2021.58
# snmpwalk -v 2c -c public localhost .1.3.6.1.4.1.2021.58
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: "/bin/sh /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: "390659584"
UCD-SNMP-MIB::ucdavis.58.101.18 = STRING: "823808"
UCD-SNMP-MIB::ucdavis.58.101.19 = STRING: "386556928"
UCD-SNMP-MIB::ucdavis.58.101.20 = STRING: "827904"
UCD-SNMP-MIB::ucdavis.58.101.21 = STRING: "5120"
UCD-SNMP-MIB::ucdavis.58.101.22 = STRING: "2224640"
UCD-SNMP-MIB::ucdavis.58.101.23 = STRING: "0"
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 = ""
出现如下数据,表示正常.
5．在cacti的devicesà Associated Data Queries添加SNMP - Disk Statistics
Create Graphs for this Host选择
你会发现要选择的硬盘太多,你可以用iostat命令,照这里添加
avg-cpu: %user %nice %system %iowait %steal %idle
1.11 0.28 1.61 0.55 0.00 96.45
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
sda 2.70 23.93 38.02 763647 1213086
sda1 0.00 0.05 0.00 1609 14
sda2 2.69 23.68 38.01 755634 1212824
sda3 0.00 0.05 0.00 1617 0
sda4 0.00 0.00 0.00 10 0
sda5 0.01 0.14 0.01 4345 248
我使用虚拟机测试的
排错
如果出现
snmpwalk -v 2c -c public localhost .1.3.6.1.4.1.2021.58
UCD-SNMP-MIB::ucdavis.58 = No Such Object available on this agent at this OID
你先执行snmpwalk -v 2c -c public localhost,看看是否正常,如不正常,说明snmpd.conf其他配置有问题,如正常,说明刚才添加exec有问题,请检查.
Snmp.conf提前设置
40 # sec.name source community
41 com2sec notConfigUser default mynetsnmp
61 # group context sec.model sec.level prefix read write notif
62 access notConfigGroup "" any noauth exact all none none
77 ## group.name sec.model sec.name
78 group MyRWGroup v1 local
79 group MyRWGroup v2c local
80 group MyRWGroup usm local
86 ## incl/excl subtree mask
87 view all included .1 80
参考: http://upfelix.blogbus.com/logs/7 谢谢分享！
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