Hi, @rahul, gui interface lives at port 3000 not 7547, 7547 is for cwmp, you have to put it in CPE before your cpe can communicate with genieacs server.
genieacs server url ==> http://ipaddress:7547
genieacs gui url ==> http://ipaddress:3000
following this guide https://github.com/genieacs/genieacs/wiki/Installation-Guide-Ubuntu-16.04 if rake db:migrate doesn’t work, use rake db:reset instead.
Also, i suggest you to forget instructions at https://genieacs.com/docs/ ,as it seems to always run into many errors.
But authors released genieacs version 1.2.1, gui is integrated to app and no more ruby. Both install methods, from npm or sources work flawlessly.