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Downloading Diode Sender Add-On
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Diode Sender Add-On

This Add-On works together with the Diode Receiver Add-On (https://splunkbase.splunk.com/app/4262/)

It is designed to send data between Splunk servers that can pass through a data diode, while preserving the Splunk metadata.

The sender will encapsulate Splunk metadata like sourcetype, source, host, _time into the _raw message which can then be forwarded over UDP or TCP. The receiver will unpack this and populate the metadata fields as well and restore the _raw to its original state.

The output for syslog over TCP and UDP sent on the wire will look like this:

<42>Oct 29 19:12:45 diode-sender t=1540825965|st=splunkd|s=/opt/diode/splunk-sender/var/log/splunk/metrics.log|h=diode-sender|r=10-29-2018 19:12:45.746 +0400 INFO  Metrics - .....`


Keep the syslog PRI code and hostname and timestamp to stick to the syslog RFC. Some diodes check format.
The PRI code is 42 for obvious reasons.

This syslog-stanza MUST be called 'diode-syslog-tcp' and is referenced in transforms.conf
PRO: Can handle larger events
CON: Not always supported by diode

Create a local/outputs.conf:

disabled = false
server =
type = tcp
priority = <42>
timestampformat = %b %e %H:%M:%S

PRO: Always works
CON: limited to MTU size
This syslog-statement MUST be called 'diode-syslog-udp' and is referenced in transforms.conf

Create a local/outputs.conf:

disabled = false
server =
type = udp
priority = <42>
timestampformat = %b %e %H:%M:%S


In props.conf edit the sourcetypes you want to forward, or use default

Sample local/props.conf:

TRANSFORMS-diode-1-rewrite=add_host, add_source, add_sourcetype, add_time

Release Notes

Version 1.1
Oct. 29, 2018

1.1 Updated transforms, documentation, etc.

Version 1.0
Oct. 24, 2018

* First release


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