A MySQL server can accept incoming connections from specific IP addresses. By default every MySQL-server listens to local IP address 127.0.0.1, every MariaDB server accepts all connections (i.e. it listens 0.0.0.0). You can set up remote access.
Navigate to Cluster settings → Cluster nodes → select a server with MySQL server role → click Edit. On the form that will open enable remote access, and select an IP address.
Creating a database user
User creation and edit procedure will be changed in the course of time. If remote access is now allowed for the server, where a user should be located, the corresponding checkbox will be hidden on the user configuration form.
In ISPmanager Business the APS scripts setup procedure will be modified: if the main role is assigned to the cluster nodes which role differs from its MySQL role, you will get the following error when trying to install an APS, in case remote access is now allowed: