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

error_log stderr notice;

worker_processes 1;
events {
  multi_accept on;
  use epoll;
  worker_connections 1024;
}

stream {
        upstream kube_apiserver {
            least_conn;
            {% for host in groups['kube-master'] -%}
            server {{ hostvars[host]['access_ip'] | default(hostvars[host]['ip'] | default(hostvars[host]['ansible_default_ipv4']['address'])) }}:{{ kube_apiserver_port }};
            {% endfor %}
        }

        server {
            listen        127.0.0.1:{{ nginx_kube_apiserver_port|default(kube_apiserver_port) }};
            proxy_pass    kube_apiserver;
            proxy_timeout 10m;
            proxy_connect_timeout 1s;

        }

}