I have provisioned an 8 node cluster with kerberos and enabled Ranger Admin HA (ambari 2.6.5 \ranger 1.0). I am using httpd for load-balancing .
The load-balancer URL does not work, the warning of hdfs namenode is
it seems that the load-balancer give an url to a http request from node which contain a ranger admin,and kerberos not works well
You could rely on Knox service to set up a gateway.