Added optional controller and scheduler extra args to kubeadm config (#2205)

roles/kubernetes/master/defaults/main.yml

@@ -83,8 +83,11 @@ controller_mgr_custom_flags: []
 scheduler_custom_flags: []
 
 # kubeadm settings
-# Value of 0 means it never expires
+## Value of 0 means it never expires
 kubeadm_token_ttl: 0
+## Extra args for k8s components passing by kubeadm
+kube_kubeadm_controller_extra_args: {}
+kube_kubeadm_scheduler_extra_args: {}
 
 ## Variable for influencing kube-scheduler behaviour
 volume_cross_zone_attachment: false

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

@@ -67,6 +67,15 @@ controllerManagerExtraArgs:
 {% if kube_feature_gates %}
   feature-gates: {{ kube_feature_gates|join(',') }}
 {% endif %}
+{% for key in kube_kubeadm_controller_extra_args %}
+  {{ key }}: {{ kube_kubeadm_controller_extra_args[key] }}
+{% endfor %}
+{% if kube_kubeadm_scheduler_extra_args|length > 0 %}
+schedulerExtraArgs:
+{% for key in kube_kubeadm_scheduler_extra_args %}
+  {{ key }}: {{ kube_kubeadm_scheduler_extra_args[key] }}
+{% endfor %}
+{% endif %}
 apiServerCertSANs:
 {% for san in  apiserver_sans.split(' ') | unique %}
   - {{ san }}