Splunk Search

How to get dynamic source name from a request?

batham
Explorer

Hi Folks ,

I am new to splunk and trying to get dynamic source value from the response, here is my query:  

index="itestData" AND source="/opt/ABC/DEF/GHI/KLM/LOG*" AND "error"

Please note that * after LOG is a dynamic value (like LOG-A.log , LOG-B.log, LOG-C.log) and there are at least 70 servers like this, when i get any error i want to know from which log this error is coming (A or B or C and so on) .

Let me know if there is any other way to get this (i do not want to individually put the name of sources as servers go up and down )

Thanks in advance.

Labels (3)
0 Karma

bowesmana
SplunkTrust
SplunkTrust

Use rex to extract the server name from the source, i.e.

| rex field=source ".*LOG-(?<server>.*)"

That will give you a new field name called 'server' - note it captures everything in the source field following LOG-

Then you can do whatever you want with that new field.

richgalloway
SplunkTrust
SplunkTrust

When you look at the output of that search you should see 'host=', 'source=', and 'sourcetype=' values under each returned event.  Those values are exact, without wildcards.  You can can include the source field in the output using the table command.

index="itestData" AND source="/opt/ABC/DEF/GHI/KLM/LOG*" AND "error"
| table source
---
If this reply helps you, Karma would be appreciated.
Get Updates on the Splunk Community!

Splunk Observability Cloud’s AI Assistant in Action Series: Analyzing and ...

This is the second post in our Splunk Observability Cloud’s AI Assistant in Action series, in which we look at ...

Elevate Your Organization with Splunk’s Next Platform Evolution

 Thursday, July 10, 2025  |  11AM PDT / 2PM EDT Whether you're managing complex deployments or looking to ...

Splunk Answers Content Calendar, June Edition

Get ready for this week’s post dedicated to Splunk Dashboards! We're celebrating the power of community by ...