Google's HTTP(S) load balancer has cross-region load balancing. But that's not a useful case for me (and tons of people I'd argue) because I have servers in unmanaged groups that need low latency communication among them. So I need to load balance unmanaged instance groups across ZONES e.g. zone-a unmanaged group, zone-b unmanaged group, and zone-c unmanaged group. What am I missing? Is this VERY basic use case not supported by Google?
BTW, the servers are in unmanaged groups because they MUST have slightly different configurations. Please don't tell me it's time to move to AWS...sigh