Upgrade to kubeadm (#1667)

* Enable upgrade to kubeadm

* fix kubedns upgrade

* try upgrade route

* use init/upgrade strategy for kubeadm and ignore kubedns svc

* Use bin_dir for kubeadm

* delete more secrets

* fix waiting for terminating pods

* Manually enforce kube-proxy for kubeadm deploy

* remove proxy. update to kubeadm 1.8.0rc1

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

@@ -17,7 +17,6 @@ networking:
   podSubnet: {{ kube_pods_subnet }}
 kubernetesVersion: {{ kube_version }}
 cloudProvider: {{ cloud_provider|default('') }}
-#TODO: cloud provider conf file
 authorizationModes:
 - Node
 {% for mode in authorization_modes %}
@@ -53,7 +52,6 @@ apiServerExtraArgs:
   runtime-config: {{ kube_api_runtime_config }}
 {% endif %}
   allow-privileged: "true"
-#TODO: Custom flags compatible with kubeadm
 controllerManagerExtraArgs:
   node-monitor-grace-period: {{ kube_controller_node_monitor_grace_period }}
   node-monitor-period: {{ kube_controller_node_monitor_period }}
@@ -61,7 +59,6 @@ controllerManagerExtraArgs:
 {% if kube_feature_gates %}
   feature-gates: {{ kube_feature_gates|join(',') }}
 {% endif %}
-#schedulerExtraArgs:
 apiServerCertSANs:
 {% for san in  apiserver_sans.split(' ') | unique %}
   - {{ san }}