Running External Commands or Commands through Actions

[abel5405]

Greetings All,
I created an item that measures the amount of disk space uncompressed IIS logs take up on a particular drive. When the size exceeds a specified limit I need it to run a command script to compress the logs. I have created the trigger and the action for the trigger to call the cab script local on the target Windows box. The Item and Trigger work fine but when it try's to run the action it get's the following error:

"Get value from agent failed: ZBX_TCP_READ() timed out"

No matter how I configure the action or trigger I get the same error. What am I doing wrong? Many thanks as always for any help.

v/r
Chris

[ingus.vilnis]

Hi Chris,

Can Zabbix Server connect to the remote agent in the first place?

telnet <remote agent IP> 10050

If telnet gets through, it may be that the script execution takes long time, longer than the default 3 seconds set in zabbix_agentd.conf file. Increase Timeout=30, restart the agent to apply and see again. However, if the script takes even longer then probably put a caller script which returns answer to Zabbix immediately and executes the other script not waiting for it to end.

[abel5405]

Hi Chris,

Can Zabbix Server connect to the remote agent in the first place?

telnet <remote agent IP> 10050

If telnet gets through, it may be that the script execution takes long time, longer than the default 3 seconds set in zabbix_agentd.conf file. Increase Timeout=30, restart the agent to apply and see again. However, if the script takes even longer then probably put a caller script which returns answer to Zabbix immediately and executes the other script not waiting for it to end.

Thanks Vilnis for the quick reply! The Zabbix timeout is set to 30 seconds for the agent and the proxy server can hit the agent on 10050. How would I setup a caller script that you mention, can not seem to find it in the docs. Again many thanks for the reply!

v/r
Chris

[ingus.vilnis]

Remote commands must be enabled in both Proxy and Agent config files (disabled by default).

https://www.zabbix.com/documentation/4.0/manual/config/notifications/action/operation/remote_command

And what version of Zabbix do you run there? Remote commands via proxies are supported only starting from Zabbix 3.4.0.

How long does the compression take before we get to any additional scripting?

[abel5405]

Remote commands must be enabled in both Proxy and Agent config files (disabled by default).
https://www.zabbix.com/documentation...remote_command

And what version of Zabbix do you run there? Remote commands via proxies are supported only starting from Zabbix 3.4.0.

How long does the compression take before we get to any additional scripting?

We are on Zabbix 3.4.15. The compression script could take up to 15 minutes to run completely through depending on how many log files there are to compress.

Edit: I did go through the remote command section of the PDF but still get the same error.

[ingus.vilnis]

Can you check whether the compression is actually run and finished successfully even if Zabbix returns you timeout error? I wonder what happens if the script is executed. I would not expect Zabbix agent to kill it immediately after timeout.

[abel5405]

Can you check whether the compression is actually run and finished successfully even if Zabbix returns you timeout error? I wonder what happens if the script is executed. I would not expect Zabbix agent to kill it immediately after timeout.

We are able to run the script manually with no issue.

[ingus.vilnis]

Yes, that is clear. But I wonder what happens when Zabbix action throws this error. Is the script still executed on the target host (even if Zabbix could not wait till it finishes because of timeout)?

[abel5405]

My apologize for misunderstanding, The script doe not run on the target. I see it go to "In Progress" for about 30 seconds then fail.

[morphlingg]

maybe it had failed immediatly and after 30 seconds only gave the message