Added apiserver extra args variable for kubeadm config (#2291)

roles/kubernetes/master/defaults/main.yml

@@ -83,6 +83,7 @@ controller_mgr_custom_flags: []
 scheduler_custom_flags: []
 
 ## Extra args for k8s components passing by kubeadm
+kube_kubeadm_apiserver_extra_args: {}
 kube_kubeadm_controller_extra_args: {}
 kube_kubeadm_scheduler_extra_args: {}
 

roles/kubernetes/master/templates/kubeadm-config.yaml.j2

@@ -58,6 +58,9 @@ apiServerExtraArgs:
   runtime-config: {{ kube_api_runtime_config | join(',') }}
 {% endif %}
   allow-privileged: "true"
+{% for key in kube_kubeadm_apiserver_extra_args %}
+  {{ key }}: {{ kube_kubeadm_apiserver_extra_args[key] }}
+{% endfor %}
 controllerManagerExtraArgs:
   node-monitor-grace-period: {{ kube_controller_node_monitor_grace_period }}
   node-monitor-period: {{ kube_controller_node_monitor_period }}