Entitlements service is not available internally within cluster
Entitlements service could not be accessed via http://entitlements/api/entitlements/v2 The legacy code once sees that an external client tries to access entitlements service via http does a redirect response, which causes errors on the client side. Since internally inside Kubernetes cluster, all communication is going using http://{service_name}/api/..., this behavior causing problems.
Edited by Rostislav Vatolin