I have done the following:
Created basic APP framework through the WEB-GUI on a standalone Search Head. Then found found the APP files which the GUI created here: /apps/splunk/etc/apps/myapp
Tar up that directory:
cd /apps/splunk/etc/apps; tar cvf myapp.tar myapp
Transfer and untar myapp.tar to your search head deployer to this directory /apps/splunk/etc/shcluster/apps.
Once you have /apps/splunk/etc/shcluster/apps/myapps on your deployer, then run "shcluster-apply stage" and "shcluster-apply send" to update your search head cluster.
I found if I tried to create through the Search Head Cluster WEB-GUI, the updates are not replicated properly between the cluster nodes.
I'm guessing this is the manual method as mentioned above. I've haven't yet found a more efficient way to do this.
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