Where can I find the logs

Service Log
MySQL/MariaDB /var/lib/mysql/mysql-error.log or /var/log/mysqld.log
ftrack /tmp/ftrack.log
supervisord /tmp/supervisord.log
Event server /tmp/ftrack_push.log
Thumbor /tmp/ftrack_thumbor.log
other services /tmp/ftrack_*

Server lost power and MySQL wont start

If your MySQL database wont start after an accidental shut down, for example after a power failure, you should look at the MySQL log. If you see “Another MySQL daemon already running with the same unix socket” when trying to restart the database, you need to remove the existing socket.