Add a variable that defaults to kube_apiserver_port that defines

the which port the local nginx proxy should listen on for HA
local balancer configurations.

roles/kubernetes/node/templates/nginx.conf.j2

@@ -16,7 +16,7 @@ stream {
         }
 
         server {
-            listen        127.0.0.1:{{ kube_apiserver_port }};
+            listen        127.0.0.1:{{ nginx_kube_apiserver_port }};
             proxy_pass    kube_apiserver;
             proxy_timeout 10m;
             proxy_connect_timeout 1s;

roles/kubernetes/preinstall/tasks/set_facts.yml

@@ -10,7 +10,7 @@
 - set_fact:
     kube_apiserver_endpoint: |-
       {% if not is_kube_master and loadbalancer_apiserver_localhost -%}
-           https://localhost:{{ kube_apiserver_port }}
+           https://localhost:{{ nginx_kube_apiserver_port }}
       {%- elif is_kube_master and loadbalancer_apiserver is not defined -%}
            http://127.0.0.1:{{ kube_apiserver_insecure_port }}
       {%- else -%}