I recently contributed to a paper put out by ex-colleage and now CEO of HighOps, Marco Abis, entitled Service Discovery: 6 questions to 4 experts. In it, Nitesh Kant (Netflix), Jeff Lindsay (Glider Labs), Eberhard Wolff (innoQ) and I share our opinions of what service discovery is, and the current state of tooling in this area. It's well worth a read - Marco did a good job of pulling together something coherent from my ramblings, and I found the other contributions to be very insightful.