extracting numeric values from a text file

[nicolasg]

Hi All,

I need to measure on zabbix numeric values from a specific text file (single line) that is created by an application and updated every minute.

The way I was trying to accomplish this was by creating a UserParameter in the agent configuration file like:
UserParameter=system.test,cat /tmp/test_file.txt
or
UserParameter=system.test,se 1q /tmp/test_file.txt

Unfortunately when creating an item in the front end I can't see any data values and the item status changes to NOT SUPPORTED ...

Any ideas on what am I doing wrong or a different method how to make this work ?

[nicolasg]

Any ideas anyone ? can someone at least confirm this is a Zabbix limitation ?

[JBo]

Hi,

If /tmp/test_file.txt contains only a line with the numeric value you want,

 UserParameter=system.test,cat /tmp/test_file.txt

should be OK.

I have done this kind of trick and it works fine.
Make sure that zabbix user has read permission on the file.

Regards,
JBo

[eskytthe]

Hi,
NOT SUPPORTED means you are not getting any data from the agent.
Hints I hope can help you:
- Try full path to your cat command (/bin/cat)
- Turn on debugging on the agent – and check the log file
- Check that the zabbix user (on agent host) have permission to run cat …
BR
Erik

[jamied66]

if this is your first custom check on this server, also double-check that the zabbix user has a shell avaiable (look in /etc/passwd and make sure the zabbix user's shell is set to /bin/bash instead of something like /bin/false or /sbin/nologin).