Flexible upgrade of multi-subsystem products

A computer-implemented method comprising:

• generating an upgrade manager service for implementation of a first sub-system upgrade package from within a third-party system that hosts the first sub-system;
• generating the first sub-system upgrade package according to a compatibility with a first sub-system version currently deployed in the third-party system to update the first sub-system with at least one feature available in an upgraded version of the first sub-system;
• sending the upgrade manager service to the third-party system;
• receiving a first request for the first sub-system upgrade package from the upgrade manager service running in the third-party system;
• and
• sending the first sub-system upgrade package for implementation at the first sub-system by the upgrade manager service running in the third-party system.

A computer program product comprising a non-transitory computer-readable medium having a computer-readable program code embodied therein to be executed by one or more processors, the program code including instructions to:

• generate an upgrade manager service for implementation of a first sub-system upgrade package from within a third-party system that hosts the first sub-system;
• generate the first sub-system upgrade package according to a compatibility with a first sub-system version currently deployed in the third-party system to update the first sub-system with at least one feature available in an upgraded version of the first sub-system;
• send the upgrade manager service to the third-party system;
• receive a first request for the first sub-system upgrade package from the upgrade manager service running in the third-party system;
• and
• send the first sub-system upgrade package for implementation at the first sub-system by the upgrade manager service running in the third-party system.