COAP Modular Input
Overview
Details
Splunk COAP (Constrained Application Protocol) Modular Input v0.7b
Overview
This is a Splunk Modular Input Add-On for indexing messages from a COAP Server.
What is COAP ?
http://en.wikipedia.org/wiki/Constrained_Application_Protocol
COAP and MQTT
http://eclipse.org/community/eclipse_newsletter/2014/february/article2.php
Implementation
This Modular Input utilizes the Californium Java client library version 1.0 , https://eclipse.org/californium/
Dependencies
- Splunk 5.0+
- Java Runtime 1.7+
- Supported on Windows, Linux, MacOS, Solaris, FreeBSD, HP-UX, AIX
Setup
- Optionally set your JAVA_HOME environment variable to the root directory of your JRE installation.If you don't set this , the input will look for a default installed java executable on the path.
- Untar the release to your $SPLUNK_HOME/etc/apps directory
- Restart Splunk
Configuration
As this is a Modular Input , you can then configure your COAP inputs via Manager->Data Inputs->COAP.
Logging
Any log entries/errors will get written to $SPLUNK_HOME/var/log/splunk/splunkd.log
JVM Heap Size
The default heap maximum is 64MB.
If you require a larger heap, then you can alter this in $SPLUNK_HOME/etc/apps/coap_ta/bin/coap.py on line 95
JVM System Properties
You can declare custom JVM System Properties when setting up new input stanzas.
Note : these JVM System Properties will apply to the entire JVM context and all stanzas you have setup
Customized Message Handling
The way in which the Modular Input processes the received COAP messages is enitrely pluggable with custom implementations should you wish.
To do this you code an implementation of the com.splunk.modinput.coap.AbstractMessageHandler class and jar it up.
Ensure that the necessary jars are in the $SPLUNK_HOME/etc/apps/coap_ta/bin/lib directory.
If you don't need a custom handler then the default handler com.splunk.modinput.coap.DefaultMessageHandler will be used.
Code examples are on GitHub : https://github.com/damiendallimore/SplunkModularInputsJavaFramework/tree/master/coap/src/com/splunk/modinput/coap
Troubleshooting
- JAVA_HOME environment variable is set or "java" is on the PATH for the user's environment you are running Splunk as
- You are using Splunk 5+
- You are using a 1.7+ Java Runtime
- You are running on a supported operating system
- Look for any errors in $SPLUNK_HOME/var/log/splunk/splunkd.log
- Run this command as the same user that you are running Splunk as and observe console output : "$SPLUNK_HOME/bin/splunk cmd python ../etc/apps/coap_ta/bin/coap.py --scheme"
Contact
This project was initiated by Damien Dallimore , damien@baboonbones.com
Release Notes
Version 0.7
Minor HEC data handling tweaks
Version 0.6
Added support to optional output to Splunk via a HEC (HTTP Event Collector) endpoint
Version 0.5
Initial beta release