I'am try to change bin log directory in my.conf as:
/usr/sbin/mysqld: File '/home/developer/logs/mysql/mysql-bin.index'
not found (Errcode: 13)
111005 12:47:58 [ERROR] Aborting
As usual, the solution was simple but not obvious: it needed to edit apparmor settings I just added to /etc/apparmor.d/usr.sbin.mysqld a new string with path to target directory: /home/developer/logs/* rw