Remoted in and found that the server was in fairly funky state.
It is ubuntu 12.04, and while we typically recommend to update, this particular issue was simply due to ondrej attempting to install php 7, but the packages variable on fogsettings was pre-labelled as php 5. Removed the packages variable and php/apache on the node, updated the php version stored in the fogsettings, reinstalled ondrej, and re-ran installer .