Is it possible to disable service discovery with environment variables in kubernetes?

Question

As we know, kubernetes supports 2 primary modes of finding a Service - environment variables and DNS, could we disable the first way and only choose the DNS way?

Answer 1

As shown in this PR, this feature will land with Kubernetes v1.13. From the PR (as Docs are not available yet) I expect it to be the field enableServiceLinks in the pod spec with true as default.

Edit: It has been a while and the PR finally landed. The enableServiceLinks was added as an optional Boolean to the Kubernetes PodSpec.

For the record: using DNS to discover service endpoints is the recommended approach. The docker link behavior, from where the environment variables originate, has long been deprecated.