Changes based on feedback (additional ansible checks)

roles/kubernetes/preinstall/tasks/etchosts.yml

@@ -17,7 +17,7 @@
     line: "{{ loadbalancer_apiserver.address }} {{ apiserver_loadbalancer_domain_name| default('lb-apiserver.kubernetes.local') }}"
     state: present
     backup: yes
-  when: loadbalancer_apiserver.address is defined and apiserver_loadbalancer_domain_name is defined
+  when: loadbalancer_apiserver is defined and loadbalancer_apiserver.address is defined and apiserver_loadbalancer_domain_name is defined
 
 - name: Hosts | localhost ipv4 in hosts file
   lineinfile: