Getting Data In

props.conf precedence

afaraino
Explorer

Hi Everyone,

I'm having a little issue related with props.conf precedence. I want to apply a transforms stanza to set a sourcetype, then another stanza to extract the Metadata:Host field for this sourcetype. I tried this in props.conf :

[source::udp:514]
TRANSFORMS-changesourcetype = set_juniper-sa-access
[juniper-sa-access]
TRANSFORMS-changehost = juniper-sa-access_host

...but it's not working. The first transform sets the sourcetype to juniper-sa-access but the second one never applies.

If I change to that, it's working, but it's not the desired behaviour :

[source::udp:514]
TRANSFORMS-changesourcetype = set_juniper-sa-access
TRANSFORMS-changehost = juniper-sa-access_host

Any clue?

Is it about precedence (source > host > sourcetype)? or is it because the sourcetype is set "too late" for matching the second stanza?

Best Regards,

Alexandre Faraino

Tags (2)
0 Karma

gkanapathy
Splunk Employee
Splunk Employee

Your easiest solution is to just sourcetype = juniper-sa-access in the inputs.conf where you define the [udp://514] stanza. All data from that input will be marked with that sourcetype.

afaraino
Explorer

Actually, I can't : not all logs received on udp:514 are juniper-sa-access. The stanza set_juniper-sa-access contains a regex to check the format.

0 Karma

afaraino
Explorer

Found that similar topic :
http://splunk-base.splunk.com/answers/25512/is-my-sourcetype-override-messing-up-my-field-extraction...

The transforms.conf is read only once. So this is a "by design" behavior. I'll try something else.

Alex

0 Karma

gkanapathy
Splunk Employee
Splunk Employee

Your easiest solution is to just sourcetype = juniper-sa-access in the inputs.conf where you define the [udp://514] stanza. All data from that input will be marked with that sourcetype.

0 Karma
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

Meet the .conf26 AI Agent Buildathon Winners

At the .conf26 AI Agent Buildathon, Splunk users turned their operational expertise into working AI agents ...

Trusted Autonomy in the SOC: A Maturity Journey

AI is compressing attacker timelines and pushing SOC teams beyond human capacity thresholds. The next SOC ...

Supercharging Windows Security Detection Performance: Introducing Hybrid Field ...

Windows event logs—from Security auditing and Sysmon to PowerShell script blocks—form the operational backbone ...