cacti利用snmpdiskio 监控服务器磁盘IO监控

yanfei

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 ~ /[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

[iyunv@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

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