Add default k8s.suffix

etc/emqx.conf

@@ -153,10 +153,10 @@ cluster.autoclean = 5m
 ## Value: String
 ## cluster.k8s.app_name = emqx
 
-## The suffix added to hostname get from k8s service, only valid if cluster.k8s.address_type set to hostname
+## The suffix added to dns and hostname get from k8s service
 ##
 ## Value: String
-## cluster.k8s.hostname_suffix =
+## cluster.k8s.suffix = pod.cluster.local
 
 ## Kubernates Namespace
 ##

priv/emqx.schema

@@ -140,7 +140,7 @@
   {datatype, string}
 ]}.
 
-{mapping, "cluster.k8s.hostname_suffix", "ekka.cluster_discovery", [
+{mapping, "cluster.k8s.suffix", "ekka.cluster_discovery", [
     {datatype, string},
     {default, ""}
   ]}.
@@ -182,7 +182,7 @@
                   {address_type, cuttlefish:conf_get("cluster.k8s.address_type", Conf, ip)},
                   {app_name, cuttlefish:conf_get("cluster.k8s.app_name", Conf)},
                   {namespace, cuttlefish:conf_get("cluster.k8s.namespace", Conf)},
-                  {hostname_suffix, cuttlefish:conf_get("cluster.k8s.hostname_suffix", Conf, "")}];
+                  {suffix, cuttlefish:conf_get("cluster.k8s.suffix", Conf, "")}];
                (manual) ->
                  [ ]
             end,