Add Kubelet config, remove deprecated flags and fix minor bugs (#4724)

* Add kubelet config

* Change kubelet_authorization_mode_webhook to true

* Fix lint

* Sync env file

* Refactor the kubernetes node folder

* Remove deprecated flag and fix lint

roles/kubernetes/node/tasks/kubelet.yml

@@ -0,0 +1,71 @@
+---
+- name: Make sure dynamic kubelet configuration directory is writeable
+  file:
+    path: "{{ dynamic_kubelet_configuration_dir }}"
+    mode: 0600
+    state: directory
+  when: dynamic_kubelet_configuration
+
+- name: gets the kubeadm version
+  command: "{{ bin_dir }}/kubeadm version -o short"
+  register: kubeadm_output
+
+- name: sets kubeadm api version to v1beta1
+  set_fact:
+    kubeadmConfig_api_version: v1beta1
+  when: kubeadm_output.stdout is version('v1.13.0', '>=')
+  tags:
+    - kubelet
+    - kubeadm
+
+- name: Write kubelet environment config file (kubeadm)
+  template:
+    src: "kubelet.env.{{ kubeadmConfig_api_version }}.j2"
+    dest: "{{ kube_config_dir }}/kubelet.env"
+    backup: yes
+  notify: restart kubelet
+  when: kubeadm_output.stdout is version('v1.13.0', '>=')
+  tags:
+    - kubelet
+    - kubeadm
+
+- name: Write kubelet environment config file (kubeadm)
+  template:
+    src: "kubelet.env.j2"
+    dest: "{{ kube_config_dir }}/kubelet.env"
+    backup: yes
+  notify: restart kubelet
+  when: kubeadm_output.stdout is version('v1.13.0', '<')
+  tags:
+    - kubelet
+    - kubeadm
+
+- name: Write kubelet config file
+  template:
+    src: "kubelet-config.{{ kubeadmConfig_api_version }}.yaml.j2"
+    dest: "{{ kube_config_dir }}/kubelet-config.yaml"
+  when: kubeadm_output.stdout is version('v1.13.0', '>=')
+  tags:
+    - kubelet
+    - kubeadm
+
+- name: Write kubelet systemd init file
+  template:
+    src: "kubelet.service.j2"
+    dest: "/etc/systemd/system/kubelet.service"
+    backup: "yes"
+  notify: restart kubelet
+  tags:
+    - kubelet
+    - kubeadm
+
+- name: flush_handlers and reload-systemd
+  meta: flush_handlers
+
+- name: Enable kubelet
+  service:
+    name: kubelet
+    enabled: yes
+    state: started
+  tags:
+    - kubelet