nagios 监控磁盘 io

#官方默认插件中并无此插件，但官方还是提供了这个插件的下载

#注意：保证所有被监控机上都安装了sysstat包，并可以执行iostat命令
iostat的脚本如下：

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1. #!/bin/sh
2. #
3. # Version 0.0.2 - Jan/2009
4. # Changes: added device verification
5. #
6. # by Thiago Varela - [e-mail]
8. iostat=`which iostat 2>/dev/null`
9. bc=`which bc 2>/dev/null`
11. function help {
12. exit -1
13. }
15. # Ensuring we have the needed tools:
16. ( [ ! -f $iostat ] || [ ! -f $bc ] ) && \
17. ( echo "ERROR: You must have iostat and bc installed in order to run this plugin" && exit -1 )
19. # Getting parameters:
20. while getopts "d:w:c:h" OPT; do
21. case $OPT in
22. "d") disk=$OPTARG;;
23. "w") warning=$OPTARG;;
24. "c") critical=$OPTARG;;
25. "h") help;;
26. esac
27. done
29. # Adjusting the three warn and crit levels:
30. crit_tps=`echo $critical | cut -d, -f1`
31. crit_read=`echo $critical | cut -d, -f2`
32. crit_written=`echo $critical | cut -d, -f3`
34. warn_tps=`echo $warning | cut -d, -f1`
35. warn_read=`echo $warning | cut -d, -f2`
36. warn_written=`echo $warning | cut -d, -f3`
39. # Checking parameters:
40. [ ! -b "/dev/$disk" ] && echo "ERROR: Device incorrectly specified" && help
42. ( [ "$warn_tps" == "" ] || [ "$warn_read" == "" ] || [ "$warn_written" == "" ] || \
43. [ "$crit_tps" == "" ] || [ "$crit_read" == "" ] || [ "$crit_written" == "" ] ) &&
44. echo "ERROR: You must specify all warning and critical levels" && help
46. ( [[ "$warn_tps" -ge "$crit_tps" ]] || \
47. [[ "$warn_read" -ge "$crit_read" ]] || \
48. [[ "$warn_written" -ge "$crit_written" ]] ) && \
49. echo "ERROR: critical levels must be highter than warning levels" && help
52. # Doing the actual check:
53. tps=`$iostat $disk | grep $disk | awk '{print $2}'`
54. kbread=`$iostat $disk | grep $disk | awk '{print $3}'`
55. kbwritten=`$iostat $disk | grep $disk | awk '{print $4}'`
58. # Comparing the result and setting the correct level:
59. if ( [ "`echo "$tps >= $crit_tps" | bc`" == "1" ] || [ "`echo "$kbread >= $crit_read" | bc`" == "1" ] || \
60. [ "`echo "$kbwritten >= $crit_written" | bc`" == "1" ] ); then
61. msg="CRITICAL"
62. status=2
63. else if ( [ "`echo "$tps >= $warn_tps" | bc`" == "1" ] || [ "`echo "$kbread >= $warn_read" | bc`" == "1" ] || \
64. [ "`echo "$kbwritten >= $warn_written" | bc`" == "1" ] ); then
65. msg="WARNING"
66. status=1
67. else
68. msg="OK"
69. status=0
70. fi
71. fi
73. # Printing the results:
74. echo "$msg - I/O stats tps=$tps KB_read/s=$kbread KB_written/s=$kbwritten | 'tps'=$tps; 'KB_read/s'=$kbread; 'KB_written/s'=$kbwritten;"
76. # Bye!
77. exit $status

#下载之后，放在每台被监控机的/usr/local/nagios/libexec/目录下
#然后更改属组，赋予可执行权限


在被监控机上/usr/local/nagios/etc/nrpe.cfg配置文件里添加
command[check_sda_iostat]=/usr/local/nagios/libexec/check_iostat -d sda -w 100 -c 200

在监控机/usr/local/nagios/etc/objects/commands.cfg里面添加

define command{
        command_name    check_iostat
        command_line    $USER1$/check_iostat -d $ARG1$ -w $ARG2$ -c $ARG3$
        }

在监控机/usr/local/nagios/etc/servers/xxx.cfg里添加

define service{
        use                                 local-service
        host_name                      xxxx
        service_description           iostat
        check_command             check_nrpe!check_iostat
        }
然后检查配置是否有误

/usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg