@Shad0wguy Can you please take a screenshot of the message you see in the kernel page where is says “A valid database connection …”?
Please take a look at /var/www/html/fog/lib/fog/config.class.php to see if the database credentials are set correctly. You can try connection to the database on your main server from your storage node using the mysql command line client:
mysql -h x.x.x.x -u fogstorage -D fog -p
Put in the master server’s IP instead of x.x.x.x!
We have someone else reporting a similar issue when upgrading the storage node from 1.5.3 to 1.5.4. Possibly there is a bug/problem that we are not aware of yet. On the other hand I have done storage node installs and tests lately without running into such an issue.