topic How to determine the Forwarder that is sending data to a particular Index? Not Indexer! in Deployment Architecture

How to determine the Forwarder that is sending data to a particular Index? Not Indexer!

Pawlub1 — Fri, 17 Mar 2023 14:26:17 GMT

So I am troubleshooting missing data from hosts, I have the index name that is missing the data, and so I would like to track down the suspect forwarder that is not sending the data to the index.

I am not interested in the indexer server.

Re: How to determine the Forwarder that is sending data to a particular Index? Not Indexer!

gcusello — Fri, 17 Mar 2023 14:29:23 GMT

Hi @Pawlub1,

you could run something like this:

index=* | stats values(index) AS index count BY host

in this way you have the list of each destination index for each host.

Ciao.

Giuseppe

Re: How to determine the Forwarder that is sending data to a particular Index? Not Indexer!

somesoni2 — Fri, 17 Mar 2023 14:38:34 GMT

I would assume that 'host' field in the Splunk is matching your forwarder server name.

To find out which hosts are not sending data for a particular index, you'd need a lookup (or list ) of all hosts that are expected to send data to an index, then you can cross compare the list/lookup with hosts that are actually sending data. Something like this

If you can't create a lookup and have smaller list of hosts, you could do something like this

Re: How to determine the Forwarder that is sending data to a particular Index? Not Indexer!

Pawlub1 — Fri, 17 Mar 2023 14:56:11 GMT

Hi Guiseppe,

I appreciate your quick response, but your script shows hosts sending data to an index.

I need a script that displays hosts sending to a forwarder than sent an index.

hosts > forwarder > index

Ciao, Paul

Re: How to determine the Forwarder that is sending data to a particular Index? Not Indexer!

gcusello — Fri, 17 Mar 2023 15:15:21 GMT

Hi @Pawlub1,

sorry, let me understand: do you want to know an intermediate forwarders passing through data?

if this is your requirement it isn't possible now.

I proposed to add this information to Splun ideas (https://ideas.splunk.com/ideas/EID-I-1731) and it's "Under consideration", if you agree that's important vote for it.

Ciao.

Giuseppe

Re: How to determine the Forwarder that is sending data to a particular Index? Not Indexer!

PickleRick — Fri, 17 Mar 2023 15:18:12 GMT

Splunk generally works based on push principle which means that forwarders just send what they want and splunk happily accepts that. There is no configuration items saying that some particular forwarder should send only events to one index or something like that.

So you either must know that beforehand, have it stored in some lookup and verify as @somesoni2 wrote or check which hosts _used to_ send to a given index (provided the data hadn't rolled out of the index already) and stopped.

Re: How to determine the Forwarder that is sending data to a particular Index? Not Indexer!

Pawlub1 — Tue, 09 Jan 2024 12:31:10 GMT

Yes, that was helpful and sorry for my delayed confirmation.