added flag for not populating inventory entries to etc hosts file

roles/kubernetes/preinstall/defaults/main.yml

@@ -32,7 +32,7 @@ openstack_domain_name: "{{ lookup('env','OS_USER_DOMAIN_NAME')  }}"
 
 # For the vsphere integration, kubelet will need credentials to access
 # vsphere apis
-# Documentation regarting these values can be found 
+# Documentation regarding these values can be found
 # https://github.com/kubernetes/kubernetes/blob/master/pkg/cloudprovider/providers/vsphere/vsphere.go#L105
 vsphere_vcenter_ip: "{{ lookup('env', 'VSPHERE_VCENTER') }}"
 vsphere_vcenter_port: "{{ lookup('env', 'VSPHERE_VCENTER_PORT') }}"
@@ -49,3 +49,6 @@ vsphere_public_network: "{{ lookup('env', 'VSPHERE_PUBLIC_NETWORK')|default('')
 # Container Linux by CoreOS cloud init config file to define /etc/resolv.conf content
 # for hostnet pods and infra needs
 resolveconf_cloud_init_conf: /etc/resolveconf_cloud_init.conf
+
+# All inventory hostnames will be written into each /etc/hosts file.
+populate_inventory_to_hosts_file: true

roles/kubernetes/preinstall/tasks/etchosts.yml

@@ -9,6 +9,7 @@
     create: yes
     backup: yes
     marker: "# Ansible inventory hosts {mark}"
+  when: populate_inventory_to_hosts_file
 
 - name: Hosts | populate kubernetes loadbalancer address into hosts file
   lineinfile: