Nagios监控网络流量
之前用过一款监控网络流量的插件,感觉不太好用。因为他的in和out值只能限制到一个值。下面新用一个插件in和out值能够分别定义。和以前的插件方法大概相同。1. nagios主机安装net-snmp和RRDTOOL
2. 参照cacti,windows和linux的监控。在被监控主机上添加nagios主机IP
1. 查找以下字段
# sec.namesource community
com2sec local 127.0.0.1 public
com2sec local 192.168.2.2 public
#将"comunity"字段改为你要设置的密码.比如"public".将“default”改为你想哪台机器可以看到你的snmp信息,如192.168.2.2,我这里将source修改成了nagios主机。
2. 查找以下字段
#context sec.model sec.level matchread writenotif
access MyROGroup "" any noauth exactall none none
access MyRWGroup "" any noauth exactall all none
#将read字段修改成all
3. 查找以下字段
# incl/excl subtree mask
view all included.1 80
#把view前的#去掉
3. 测试
重启 snmp
service snmpd restart
在被空端:
snmpwalk –c public –v 2c localhost
在主控端测试
snmpwalk -v 2c -c public被控端ip |grep IF
如果没有if信息不能获取流量
3. 获取被控端网卡信息
# ./check_traffic.sh -V 2c -C public -H 192.168.2.6 -L
List Interface for host 192.168.2.6.
Interface index 1 orresponding tolo
Interface index 2 orresponding toeth0
Interface index 3 orresponding toeth1
4. 在nagios主机上添加check_traffic脚本
# ./check_traffic.sh -h
Usage:
./check_traffic.sh [ -v ] [ -6 ] [ -r ] -V 1|2c|3 -C snmp-community -H host [ -L ] -I interface -w in,out-warning-value-c in,out-critical-value -K/M -B/b
Example:
./check_traffic.sh -V 2c -C public -H 127.0.0.1 -I 4 -w 200,100 -c 300,200 -K -B
Or -r to use Range Value Options:
./check_traffic.sh -V 2c -C public -H 127.0.0.1 -I 4 -r -w 200-300,100-200 -c 100-400,50-250 -K -B
If you don't use -K/M -B/b options, default -K -b, corresponding to Kbps. (默认单位)
Make sure that the check interval greater than 5 Seconds.
Or modify the Min_Interval var in this file Line 180.
And, if you want in Verbose mode, use -v, to check the debug messages in the file /tmp/check_traffic.$$.
Or use ./check_traffic.sh [ -v ] -V 1|2c|3 -C snmp-community -H host -L
To list all interfaces on specify host.
# ./check_traffic.sh -V 2c -C public -H 192.168.2.6 -I 3 -w 200,300 -c 400,500 -K –B 定义in和out值分别超过200K、300K警告,超过400K,500k严重警告。
OK - It's the first time for this plugins run. We'll get the data from the next time.
第一次执行,history data file(/var/tmp/check_traffic_${Host}_${Interface}.hist_dat)不存在,因此会由此提示,可以忽略,再执行一次可以正正常获取
OK - The Traffic In is 1.3750KB, Out is 0.0KB, Total is 1.3750KB. The Check Interval is 104s |In=1.3750KB;200;400;0;0 Out=0.0KB;300;500;0;0 Total=1.3750KB;500;900;0;0 Interval=104s;1200;1800;0;0
5. 在nagios的command文件里面定义check_traffic命令
# 'check_traffic' command definition
define command{
command_namecheck_traffic
command_line $USER1$/check_traffic.sh -V 2c -Cpublic -H $HOSTADDRESS$ -I $ARG1$ -w $ARG2$ -c $ARG3$ -K -B监控单位可以自定义
}
6. 在nagios的监控对象cfg文件里面添加check_traffic
define service{
use generic-service
host_name linux
service_description traffic
check_command check_traffic!3!200,300!400,500 监控eth1网卡
} #与定义的宏对应添加参数值
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