[keycloak-user] Cluster Configuration

Have the setup steps for clustering with Docker changed since the April 2015 blog post? When I go through those instructions with version 2.0.0.Final I'm not getting anything like 'Received new cluster view: [b5356f1050cc/keycloak|1] (2) [b5356f1050cc/keycloak, f25f922ce14d/keycloak]' in the logs. I only ever see a single node being listed.