Splunk Search

Iterate Through Field Values in Static File

mconte01
Explorer

I need to get the most recent event from about 100 different "channels" that are defined in my data. But the only way I know of to do this would be "chan_name='x' OR "chan_name='y' ..." for 100 different channel names. What I want is to be able to feed Splunk a static file with all of these names listed and then iterate over each one. Is this possible?

The query would need to look something like this:

sourcetype="foo" chan_name="[channel_name]" | head 1

where [channel_name] would take the value of each name listed in the static file.

Tags (1)
1 Solution

dwaddle
SplunkTrust
SplunkTrust

Yes, through a combination of inputlookup and subsearches. But head won't work because it doesn't understand a 'by' clause. So, we'll approach it like this:

sourcetype="foo" [ | inputlookup channel_names.csv ] | dedup chan_name

You'll need to define a file in $SPLUNK_HOME/etc/system/lookups called channel_names.csv. Its contents should be as follows:

chan_name
x
y
z
p
foo
bar
baz
potato
bacon
.
.
.
channel100

The end result is that Splunk will read the lookup, and as output of the subsearch "fill in" the outside search with a list of values from the CSV file. Then, dedup will keep the most recent event for each value of chan_name. (The use of dedup may not be the most efficient way of doing this)

View solution in original post

dwaddle
SplunkTrust
SplunkTrust

Yes, through a combination of inputlookup and subsearches. But head won't work because it doesn't understand a 'by' clause. So, we'll approach it like this:

sourcetype="foo" [ | inputlookup channel_names.csv ] | dedup chan_name

You'll need to define a file in $SPLUNK_HOME/etc/system/lookups called channel_names.csv. Its contents should be as follows:

chan_name
x
y
z
p
foo
bar
baz
potato
bacon
.
.
.
channel100

The end result is that Splunk will read the lookup, and as output of the subsearch "fill in" the outside search with a list of values from the CSV file. Then, dedup will keep the most recent event for each value of chan_name. (The use of dedup may not be the most efficient way of doing this)

mconte01
Explorer

This worked perfectly. Thanks a lot!

0 Karma

mconte01
Explorer

I had used lookups for display purposes but I didn't know you could pass them in as inputs to searches so thanks a lot. channel_names.csv doesn't actually exist yet since I'm waiting for someone else to generate that for me but I will let you know how it works when I test it out. Thanks!

0 Karma
Get Updates on the Splunk Community!

Index This | I am a number, but when you add ‘G’ to me, I go away. What number am I?

March 2024 Edition Hayyy Splunk Education Enthusiasts and the Eternally Curious!  We’re back with another ...

What’s New in Splunk App for PCI Compliance 5.3.1?

The Splunk App for PCI Compliance allows customers to extend the power of their existing Splunk solution with ...

Extending Observability Content to Splunk Cloud

Register to join us !   In this Extending Observability Content to Splunk Cloud Tech Talk, you'll see how to ...