Do you have a TCP proxy set up in your service settings? gRPC doesn't use normal HTTP(S), which is what the PORT variable is for.

why no one says it.

Solution is adding proxy, entering port that you expose in the Dockerfile, use the given address in the channel of your client

Hey guys - did you ever figure out how to make both a grpc and an http host/port work? I'm able to set up one or the other but not both for a service. Weaviate client requires both I believe