Support for Backup Logical Routes

[stanleyowen]

Is your feature request related to a problem? Please describe.
Imagine you’re driving to work, using your typical daily route. As you start to merge onto a familiar road, you see it — road construction and a bright detour sign with an arrow. Where would you be without that sign? As in real life, when an API server failed to process or crashes, then we would have an alternative way to post it to the other alternative API server.

Describe the solution you'd like
By supporting backup logical routes, it will improves the services and uptime to 99%.

Describe alternatives you've considered
By creating more than one server and ping it to each server, as when one of the server crashes, it will automatically switch to the other healthy server`.