Tried a test upgrade here on a system running observium professional (0.16.8.8086). Ubuntu upgrade went fine, added in mcrypt, php7.0. Was able to get into observium and most items looked ok that I could find with the exception of the VRF listing. (attached)

The other areas, BGP, OSPF, etc all list out fine. The VRF section, as you can see lists the 2151 VRF's that we have but they are not displayed/listed. I checked php.ini, memory limit was set to 1024M which is the same I had w/ php5 under 14.04.

Went back to 14.04 and figured I'd ask if anyone here who's done a similar upgrade has seen anything similar or any ideas on what else I can check?