Value from Zabbix_Agentd and Zabbix_Get from Server is Different

[arifzulfikar]

Hi All Zabbix Expert,

Now I have problem with my zabbix server, I dont know this is BUG or my mistake.
I have 2 server, which one act as Zabbix-Server and one else is monitored server.

My zabbix server IP Address is 192.168.122.103 and the monitored server is 192.168.122.3.

I want to monitor some log message, in my zabbix agentd in the monitored server (192.168.122.3) I configure user parameter like this :

UserParameter=logmessages,less /var/log/messages | wc -l

When I running this in the monitored server with this command :
[root@server3 ~]# zabbix_agentd -t logmessages
logmessages [t|16685]

The values is like what I expected, but when I trying to get the value from zabbix server
with zabbix_get command, I get different value the value is always 0 :
[root@zabbix ~]# zabbix_get -s 192.168.122.3 -p 10050 -k "logmessages"
0

The result is make a different value, I want to create graph trafic from my .txt log..

Can someone the help me?

Regards,
ArifZ

[steveboyson]

Definitely a permission problem. Most likely your zabbix user (on the agent machine) is not allowed to get the filesize in /var/log/.

Do (starting as root) a "su - zabbix --shell=/bin/bash" on the agent and check for yourself.

Oh, I just see: "less <file>" is the very wrong way of counting the number of lines. Less is the pager, it is used for displaying a file. If you want to count the lines in a file, simply use "wc -l <file>". That is very likely a problem in your setting, too.

[arifzulfikar]

Hi steve,

Thanks for help, now I use your method with wc -l <file> and zabbix_get is return true value
I use like this in user parameter for /var/log/messages :
wc -l /var/log/messages | awk '{print $1}'

By the way, how if I want to get value of service for example httpd service?
In user parameter I define like below :
UserParameter=httpdstatus,service httpd status | grep running | wc -l

When I using zabbix_agentd -t httpdstatus from the monitored server(agent) the return value is 1 like I expected.
But, when I trying zabbix_get from zabbix server to the agent the return value from the agent the value is still 0

Have any idea for my cases above?

Thx broo

Regards
ArifZ

[steveboyson]

Have you tried the command I suggested? Try to run that "service httpd status" as user "zabbix".

By the way, why don't you just use Zabbix' builtin item function "proc.num[...]"?

https://www.zabbix.com/documentation/2.0/manual/config/items/itemtypes/zabbix_agent

(this is for 2.0, but 2.2 is working the same way)

[arifzulfikar]

Hi Steve,

Thanks bro, Its work.

I know there is many template for zabbix for monitoring some service. But I have some project to developed some module. In order to monitor the service module I think I have to using this method.

Thanks btw