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/master/tasks/main.yml

@@ -2,6 +2,9 @@
 - include: pre-upgrade.yml
   tags: k8s-pre-upgrade
 
+- include: users-file.yml
+  when: kube_basic_auth|default(true)
+
 - name: Copy kubectl from hyperkube container
   command: "{{ docker_bin_dir }}/docker run --rm -v {{ bin_dir }}:/systembindir {{ hyperkube_image_repo }}:{{ hyperkube_image_tag }} /bin/cp /hyperkube /systembindir/kubectl"
   register: kube_task_result
@@ -25,63 +28,10 @@
   when: ansible_os_family in ["Debian","RedHat"]
   tags: [kubectl, upgrade]
 
-- name: Write kube-apiserver manifest
-  template:
-    src: manifests/kube-apiserver.manifest.j2
-    dest: "{{ kube_manifest_dir }}/kube-apiserver.manifest"
-  notify: Master | wait for the apiserver to be running
-  tags: kube-apiserver
+- task: Include kubeadm setup if enabled
+  include: kubeadm-setup.yml
+  when: kubeadm_enabled|bool|default(false)
 
-- meta: flush_handlers
-
-- name: Write kube system namespace manifest
-  template:
-    src: namespace.j2
-    dest: "{{kube_config_dir}}/{{system_namespace}}-ns.yml"
-  run_once: yes
-  when: inventory_hostname == groups['kube-master'][0]
-  tags: apps
-
-- name: Check if kube system namespace exists
-  command: "{{ bin_dir }}/kubectl get ns {{system_namespace}}"
-  register: 'kubesystem'
-  changed_when: False
-  failed_when: False
-  run_once: yes
-  tags: apps
-
-- name: Create kube system namespace
-  command: "{{ bin_dir }}/kubectl create -f {{kube_config_dir}}/{{system_namespace}}-ns.yml"
-  retries: 4
-  delay: "{{ retry_stagger | random + 3 }}"
-  register: create_system_ns
-  until: create_system_ns.rc == 0
-  changed_when: False
-  when: kubesystem|failed and inventory_hostname == groups['kube-master'][0]
-  tags: apps
-
-- name: Write kube-scheduler kubeconfig
-  template:
-    src: kube-scheduler-kubeconfig.yaml.j2
-    dest: "{{ kube_config_dir }}/kube-scheduler-kubeconfig.yaml"
-  tags: kube-scheduler
-
-- name: Write kube-scheduler manifest
-  template:
-    src: manifests/kube-scheduler.manifest.j2
-    dest: "{{ kube_manifest_dir }}/kube-scheduler.manifest"
-  notify: Master | wait for kube-scheduler
-  tags: kube-scheduler
-
-- name: Write kube-controller-manager kubeconfig
-  template:
-    src: kube-controller-manager-kubeconfig.yaml.j2
-    dest: "{{ kube_config_dir }}/kube-controller-manager-kubeconfig.yaml"
-  tags: kube-controller-manager
-
-- name: Write kube-controller-manager manifest
-  template:
-    src: manifests/kube-controller-manager.manifest.j2
-    dest: "{{ kube_manifest_dir }}/kube-controller-manager.manifest"
-  notify: Master | wait for kube-controller-manager
-  tags: kube-controller-manager
+- task: Include static pod setup if not using kubeadm
+  include: static-pod-setup.yml
+  when: not kubeadm_enabled|bool|default(false)