[keycloak-user] Keycloak Clustering

Hi, I have a few applications that are using Keycloak 1.5 and I now want to cluster it. I had followed this link ( https://docs.jboss.org/keycloak/docs/1.1.0.Beta2/userguide/html/clusterin...) but i am not able to access this server from outside world and I also wanted to know how I can add nodes to my cluster. Could anyone please help me out in this respect. Thanks.