@jjcjr With your concerns then the remote site will need to have a stand alone storage node, just for the reason you cited. If the master node is unreachable then imaging isn’t possible.
What you are asking for is not currently available in fog (what I’ve been calling a multi master node setup. I’ve personally had a feature request in for this for over 2 years). The developers have just added a restful api interface that was on the roadmap to provide what you are asking. But its not there just yet.
With your current setup, you only need to export from the master node and import into the remote node when you have a new image definition. If you update an existing image definition, the new files will be replicated to the remote fog server and nothing else is needed. This is how I run my multi-master fog setup.
