Cross-namespace services

I was trying to have a pod in namespace A calling to services (name: test-services) in namespace B.

But I got this error:
unable to contact http://test-services:8080/test

There is an option to open all the traffic between namespaces?

If you are in namespace A and calling test-services in namespace B, I don’t think kubernetes will be able to resolve in DNS. You need to call test-services.b