I am interested in installing your app as we run both nagios and splunk. However, we run splunk on Windows 2008 R2 Server and use the Nagiosxi CentOS Virtual appliance that they provide.
Your configuration instructions suggest that you assume that someone is running both nagios and splunk on the same linux host.
Do you have any plans on providing support for such a configuration as ours? eg The app could use puTTY to SSH to the nagios server and pull the information it needs?.
It should work installing the Forwarder in the CentOS server, and sending the data to Splunk.
You can find more details in the readme file in the app.