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/node/tasks/install.yml

@@ -13,6 +13,18 @@
     ]"
   tags: facts
 
+- name: Set kubelet deployment to host if kubeadm is enabled
+  set_fact:
+    kubelet_deployment_type: host
+  when: kubeadm_enabled
+  tags: kubeadm
+
+- name: install | Copy binary from download dir
+  command: rsync -piu "{{ local_release_dir }}/kubeadm" "{{ bin_dir }}/kubeadm"
+  changed_when: false
+  when: kubeadm_enabled
+  tags: kubeadm
+
 - include: "install_{{ kubelet_deployment_type }}.yml"
 
 - name: install | Write kubelet systemd init file

roles/kubernetes/node/tasks/main.yml

@@ -20,14 +20,24 @@
   when: is_kube_master == false and loadbalancer_apiserver_localhost|default(true)
   tags: nginx
 
-- name: Write kubelet config file
+- name: Write kubelet config file (non-kubeadm)
   template:
-    src: kubelet.j2
+    src: kubelet.standard.env.j2
     dest: "{{ kube_config_dir }}/kubelet.env"
     backup: yes
+  when: not kubeadm_enabled
   notify: restart kubelet
   tags: kubelet
 
+- name: Write kubelet config file (kubeadm)
+  template:
+    src: kubelet.kubeadm.env.j2
+    dest: "{{ kube_config_dir }}/kubelet.env"
+    backup: yes
+  when: kubeadm_enabled
+  notify: restart kubelet
+  tags: ['kubelet', 'kubeadm']
+
 - name: write the kubecfg (auth) file for kubelet
   template:
     src: "{{ item }}-kubeconfig.yaml.j2"
@@ -36,6 +46,7 @@
   with_items:
     - node
     - kube-proxy
+  when: not kubeadm_enabled
   notify: restart kubelet
   tags: kubelet
 
@@ -84,6 +95,7 @@
   template:
     src: manifests/kube-proxy.manifest.j2
     dest: "{{ kube_manifest_dir }}/kube-proxy.manifest"
+  when: not kubeadm_enabled
   tags: kube-proxy
 
 # reload-systemd