Migrate established targets from one node to another in cluster mode

[Bapths]

Hello,

Thank a lot for developing and maintaining such an useful tool!

I may be missing something but here is my concern:

Let's say that I have a cluster of 3 gNMIc nodes and I want to update the subscriptions (or perform an upgrade), when I will shut one node, I will loose every connected targets on this node for ~30s to 1min. Is there any way to force every active connections to close and reopen quickly on another one before doing anything that may have an impact?

Maybe including such a feature in the new API graceful shutdown endpoint? Or maybe there are already solutions to this issue that I am still missing?

Thanks for anyone that could help me to solve this issue 😄