Splunk Search

Custom dynamic field extraction

Simon
Contributor

Dear fellow splunkers,

I've got some events where the automatic field extraction of Splunk doesn't work. The log format looks like:

[log@1588 value="RASLOG"][timestamp@1588 value="2012-12-14T08:41:12.718453"][msgid@1588 value="SEC-1193"][seqnum@1588 value="26555"][severity@1588 value="INFO"]

Is there a way to create dynamic field extractions in the form of:

[<key>@1588 value=<value>]

I'm aware that it's possible to create a field extraction for each of my fields by hand but I'm searching for a dynamic solution 🙂

Thanks
Simon

Tags (1)
0 Karma
1 Solution

Ayn
Legend

Sure.

In transforms.conf, define your extraction:

[mycustomextraction]
REGEX = \[([^@]+)@1588 value="([^"]+)"
FORMAT = $1::$2

Then refer to your extraction in props.conf

[mysourcetype]
REPORT-customextraction = mycustomextraction

View solution in original post

Ayn
Legend

Sure.

In transforms.conf, define your extraction:

[mycustomextraction]
REGEX = \[([^@]+)@1588 value="([^"]+)"
FORMAT = $1::$2

Then refer to your extraction in props.conf

[mysourcetype]
REPORT-customextraction = mycustomextraction

Simon
Contributor

Oh man, that's so ridiculous simple that I feel shamed now 😉 Thanks for that quick solution!

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!

Event Series May & June: From Network Visibility to Service Intelligence

Unifying the Network: Moving from Alert Noise to Service Intelligence with Splunk ITSI In today’s hybrid ...

Global Splunk User Group Events: May + June 2026

Your Splunk Community Awaits: Discover Upcoming User Group Events Worldwide    Staying ahead in the fast-paced ...

Why Splunk Customers Should Attend Cisco Live 2026 Las Vegas

Why Splunk Customers Should Attend Cisco Live 2026 Las Vegas     Cisco Live 2026 is almost here, and this ...