Question
Redundancy or multi-hosting is required.
Is it possible to synchronize Plesk servers (Failover)? Does Plesk support any cluster solutions?
Answer
Failover clustering is not supported by Plesk on application level.
As a workaround, consider using a centralized database and centralized file storage (NFS) together with virtualization systems and/or cloud providers that provide high-availability functionality on server level.
For example, based on Oracle Cloud infrastructure.