How do I restrict swarm services to regions?
Eg.
Region A = 3 nodes
Region B = 3 nodes
I want 1 service instance to run in region A and one in Region B (requests being round-robined between them). If the service in region B stop working, I want another instance started in Region B etc until there are no remaining nodes left in region B.
I have tried using labels, but can get the right restrictions.