Getting Data In

Getting syslog data into splunk lightweight forwarder

ultra
Explorer

Hi, I'm new to splunk, so my question might be lame. I am trying to setup a splunk lightweight forwarder, my problem is the following. If it is a lightweight forwarder, it cannot be a listener. How do I get data into lightweight forwarder in first place (I have syslog-ng running on the same box, and I want LWF to load balance the data across several indexers)?

0 Karma

gkanapathy
Splunk Employee
Splunk Employee

The best way to do this is to just have Splunk monitor the files/directories where syslog-ng is writing (and rotating) log files. The reason for this is that the files can provide a buffer for capturing data for when the forwarder can't receive data (e.g., if the network is down and the queue fills up, or the forwarder is restarted, or a temporarily high input data rate such that the indexer backs up, etc.). For this, then you don't need to enable the network inputs. You can just create a file monitor input using the CLI or configuration file.

You can re-enable UDP inputs on a LWF by creating a local default-mode.conf file containing the entry:

[pipeline:udp]
disabled =false

but I think that capturing the data with syslog, syslog-ng, or rsyslog is better because of the buffering it provides.

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!

[Puzzles] Solve, Learn, Repeat: Matching cron expressions

This puzzle (first published here) is based on matching timestamps to cron expressions.All the timestamps ...

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 ...

Data Management Digest – May 2026

Welcome to the May 2026 edition of Data Management Digest!   As your trusted partner in data innovation, the ...