manage undefined vars for loadbalancing

roles/dnsmasq/tasks/main.yml

@@ -14,7 +14,7 @@
     regexp: ".*{{ apiserver_loadbalancer_domain_name }}$"
     line: "{{ loadbalancer_apiserver.address }} lb-apiserver.kubernetes.local"
     state: present
-  when: loadbalancer_apiserver is defined
+  when: loadbalancer_apiserver is defined and apiserver_loadbalancer_domain_name is defined
 
 - name: clean hosts file
   lineinfile:

roles/kubernetes/node/templates/manifests/kube-proxy.manifest.j2

@@ -15,7 +15,7 @@ spec:
 {% if inventory_hostname in groups['kube-master'] %}
     - --master=http://127.0.0.1:8080
 {% else %}
-{%   if loadbalancer_apiserver.address is defined | default('') %}
+{%   if loadbalancer_apiserver is defined and apiserver_loadbalancer_domain_name is defined %}
     - --master=https://{{ apiserver_loadbalancer_domain_name }}:{{ loadbalancer_apiserver.port }}
 {%   else %}
     - --master=https://{{ groups['kube-master'][0] }}:{{ kube_apiserver_port }}

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

@@ -10,7 +10,9 @@ subjectAltName = @alt_names
 DNS.1 = kubernetes
 DNS.2 = kubernetes.default
 DNS.3 = kubernetes.default.svc.{{ dns_domain }}
+{% if loadbalancer_apiserver is defined  and apiserver_loadbalancer_domain_name is defined %}
 DNS.4 = {{ apiserver_loadbalancer_domain_name }}
+{% endif %}
 {% for host in groups['kube-master'] %}
 IP.{{ loop.index }} = {{ hostvars[host]['ip'] | default(hostvars[host]['ansible_default_ipv4']['address']) }}
 {% endfor %}