Uses a variable to define a custom flag instead of directly.

The flag '--kubelet-preferred-address-types' is now defined as part of
the existing 'apiserver_custom_flags' parameter.

roles/kubernetes/master/defaults/main.yml

@@ -60,8 +60,8 @@ kube_oidc_auth: false
 # kube_oidc_groups_claim: groups
 
 ##Variables for custom flags
-apiserver_custom_flags: []
+apiserver_custom_flags: ['--kubelet-preferred-address-types=InternalDNS,InternalIP,Hostname,ExternalDNS,ExternalIP']
 
 controller_mgr_custom_flags: []
 
-scheduler_custom_flags: []
+scheduler_custom_flags: []

roles/kubernetes/master/templates/manifests/kube-apiserver.manifest.j2

@@ -36,7 +36,6 @@ spec:
     - --admission-control={{ kube_apiserver_admission_control | join(',') }}
     - --service-cluster-ip-range={{ kube_service_addresses }}
     - --service-node-port-range={{ kube_apiserver_node_port_range }}
-    - --kubelet-preferred-address-types=InternalDNS,InternalIP,Hostname,ExternalDNS,ExternalIP
     - --client-ca-file={{ kube_cert_dir }}/ca.pem
 {% if kube_basic_auth|default(true) %}
     - --basic-auth-file={{ kube_users_dir }}/known_users.csv