Cacti安裝磁碟IO監控

wonitazansa1發表於2011-01-25

平臺

CentOS5.4

cacti-0.8.7e(cacti-0.8.7g已經測試安裝正常)

snmpdiskio-0.9.6

安裝

安裝cacti平臺就不提了,網上多得是,今天主要是如何新增disk io監控的模板.

1.       將下載的snmpdiskio-0.9.4.tar.gz上傳到cacit伺服器上,解壓縮,將partition.xml拷貝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伺服器的web介面下匯入cacti_data_query_snmp_disk_statistics.xml和cacti_graph_template_disk_io_bytessec.xml

     

3.       將下載的snmpdiskio-0.9.4.tar.gz上傳到被監控機上,解壓縮,將目錄下可執行檔案snmpdisk拷貝/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/,

由於9.4太老不支援2.6核心,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 ~ /[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 <<-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.       修改被監控機的snmpd.conf,在檔案的結尾新增如下:

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

 

這裡增加了/bin/sh,我在網上搜尋了許多,都沒有加上這個,我測試就是不成功.

Service snmpd restart

測試

snmpwalk -v 2c -c public localhost .1.3.6.1.4.1.2021.58

[root@localhost ~]# 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 = ""

出現如下資料,表示正常.

 

 

5．在cacti的devicesà Associated Data Queries新增SNMP - Disk Statistics

 

Create Graphs for this Host選擇

你會發現要選擇的硬碟太多,你可以用iostat命令,照這裡新增

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

我使用虛擬機器測試的

 

 

排錯

如果出現

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

 

你先執行snmpwalk -v 2c -c public localhost,看看是否正常,如不正常,說明snmpd.conf其他配置有問題,如正常,說明剛才新增exec有問題,請檢查.

 

Snmp.conf提前設定

 

     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

 

 

 

 

參考: http://upfelix.blogbus.com/logs/7

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