ZBX_NOTSUPPORTED on Centos

[darfie21]

I'm new to zabbix and I'm testing the UserParameter feature.

I have the following command on both linux(Centos 6) and solaris:

UserParameter=custom.test,cat /etc/hosts |wc -l

When I run zabbix-get from the zabbix server to the linux machine it fails with ZBX_NOTSUPPORTED. It works fine on Solaris.

linux-reaf:/var/log/zabbix # zabbix-get -s linux -p 10050 -k custom.test
ZBX_NOTSUPPORTED

linux-reaf:/var/log/zabbix # zabbix-get -s solaris -p 10050 -k custom.test
20

Any idea why this fails on Linux ????

[Atsushi]

Did you restart Zabbix agent after UserParameter added?

[darfie21]

Yes I restarted the agent.

I should say I'm running zabbix version 2.4

[Atsushi]

Where do you set that UserParameter?
Did you added setting to directly in zabbix_agentd.conf?
Or, did you added file to include directory?

If you use include setting,
Please check include setting in zabbix_agentd.conf and file permission.

[zabanist]

I'm running 2.4.5 now, so don't have an older version of Zabbix to test.

When I receive ZBX_NOTSUPPORTED errors, it is followed with some reason for that error.

ZBX_NOTSUPPORTED: Unsupported item key.

If 2.4 does that, then we could assume that it is reading the UserParameter and knows about the key. Even with user permissions, I still get some error message from the client.

So, the things I would suggest:

1) If selinux is enabled, tail the audit log while you attempt to retrieve the key and see if something is blocking the zabbix user from reading /etc/hosts, etc.

2) Set the DebugLevel to 4 (or 5 -- 4 is usually enough for me), restart the agent. You should see the userparameter loaded, and details of what happens with the client connects and request custom.test.