使用nagios来监控接口流量主要有三种方法

1.使用snmp通用的做法，以下接口可以得到数据包的流量

IF-MIB::ifInOctets
snmpwalk  -v 2c -c public 127.0.0.1 IF-MIB::ifInOctets
IF-MIB::ifOutOctets
snmpwalk  -v 2c -c public 127.0.0.1 IF-MIB::ifOutOctets

2.使用check_traffic.sh脚本，这个个人比较偏好ITNMS石头版主很强大。

查看接口

./check_traffic.sh -V 2c -C public -H 127.0.0.1 -L

抓取接口流量

./check_traffic.sh -V 2c -C public -H 127.0.0.1 -I 2 -w200,300 -c400,500 -K -B

命令定义

define command{
        command_name    check_traffic
        command_line    /usr/lib/nagios/plugins/check_traffic.sh  -V1 -C '$ARG1$' -H $HOSTADD
RESS$ -I '$ARG2$' -w '$ARG3$' -c '$ARG4$' '$ARG5$' -b
        }
在这里第五个参数可以根据需要替换为M或者K

这个做流量监控还没有出现过问题，就是有时候没有装bc包的时候会报错

  1. -bash-3.2# /usr/local/nagios/libexec/check_traffic.sh -V 1 -C nagios -H localhost -I 2 -w 12,30 -c 15,35 -M -b
  2. /usr/local/nagios/libexec/check_traffic.sh: line 449: bc: command not found
  3. /usr/local/nagios/libexec/check_traffic.sh: line 454: bc: command not found
  4. /usr/local/nagios/libexec/check_traffic.sh: line 457: bc: command not found
  5. /usr/local/nagios/libexec/check_traffic.sh: line 458: bc: command not found
  6. /usr/local/nagios/libexec/check_traffic.sh: line 461: [: too many arguments
  7. /usr/local/nagios/libexec/check_traffic.sh: line 576: bc: command not found
  8. /usr/local/nagios/libexec/check_traffic.sh: line 577: bc: command not found
  9. Unknown - Can not found data in the history data file. Please to check the file /var/tmp/check_traffic_localhost_2.hist_dat_root__32 ,or use use verbose mode and check the debug file
     

 

3.使用nagios自带的check_mrtgtraf来监控流量，前提是系统上面已经安装了mrtg了。让nagios来读取mrtg的流量日志数据，check_mrtgtraf -h

Options:
 -h, --help
    Print detailed help screen
 -V, --version
    Print version information
 -F, --filename=STRING
    File to read log from
 -e, --expires=INTEGER
    Minutes after which log expires
 -a, --aggregation=(AVG|MAX)
    Test average or maximum
 -w, --warning
    Warning threshold pair <incoming>,<outgoing>
 -c, --critical
    Critical threshold pair <incoming>,<outgoing>


define command{
        command_name    traffic_average
        command_line    /usr/lib/nagios/plugins/check_mrtgtraf '$ARG1$' 10 AVG '$ARG2$' '$ARG
3$' '$ARG4$' '$ARG5$'
        }
值得注意的是这里的-F参数后面的日志文件是mrtg获取的日志数据的文件名