@ciprian you said that when you set it up that eth1 was what you were using as the dedicated imaging nic, but it is set to eth0. Can you try changing that setting to eth1 and let us know if that works?
Are you still seeing the update schema page? Looking through the error logs again I noticed this:
... php_network_getaddresses: getaddrinfo failed: Name or service not known ...
Sounds a bit like the hostname cannot be resolved. But as I see in the other errors you have the database on the same host as the webserver (as pretty much everyone else) using localhost as hostname. Maybe your /etc/hosts files is gone wild. Please take a look and post the content of /etc/hosts file on your FOG server.