You can do service discovery with a k/v store like etcd, or consul, which is how Kubernetes does service discovery. In fact, Consul very much positions itself a

You can do service discovery with a k/v store like etcd, or consul, which is how Kubernetes does service discovery. In fact, Consul very much positions itself as a service discovery tool. I'm not sure how it would be possible to do it in a "library" (without external centralized storage).