kubeadm support (#1631)

* kubeadm support

* move k8s master to a subtask
* disable k8s secrets when using kubeadm
* fix etcd cert serial var
* move simple auth users to master role
* make a kubeadm-specific env file for kubelet
* add non-ha CI job

* change ci boolean vars to json format

* fixup

* Update create-gce.yml

* Update create-gce.yml

* Update create-gce.yml

roles/kubernetes/preinstall/tasks/main.yml

@@ -34,29 +34,18 @@
       skip: true
   tags: facts
 
-- name: Create kubernetes config directory
+- name: Create kubernetes directories
   file:
-    path: "{{ kube_config_dir }}"
+    path: "{{ item }}"
     state: directory
     owner: kube
   when: inventory_hostname in groups['k8s-cluster']
   tags: [kubelet, k8s-secrets, kube-controller-manager, kube-apiserver, bootstrap-os, apps, network, master, node]
-
-- name: Create kubernetes script directory
-  file:
-    path: "{{ kube_script_dir }}"
-    state: directory
-    owner: kube
-  when: "inventory_hostname in groups['k8s-cluster']"
-  tags: [k8s-secrets, bootstrap-os]
-
-- name: Create kubernetes manifests directory
-  file:
-    path: "{{ kube_manifest_dir }}"
-    state: directory
-    owner: kube
-  when: "inventory_hostname in groups['k8s-cluster']"
-  tags: [kubelet, bootstrap-os, master, node]
+  with_items:
+    - "{{ kube_config_dir }}"
+    - "{{ kube_config_dir }}/ssl"
+    - "{{ kube_manifest_dir }}"
+    - "{{ kube_script_dir }}"
 
 - name: check cloud_provider value
   fail: