Restart kubelet on update in deployment-type host on update (#1759)

* Restart kubelet on update in deployment-type host on update

* Update install_host.yml

* Update install_host.yml

* Update install_host.yml

roles/kubernetes/node/tasks/install_host.yml

@@ -1,11 +1,23 @@
 ---
+- name: install | Compare host kubelet with hyperkube container
+  command: "{{ docker_bin_dir }}/docker run --rm -v {{ bin_dir }}:/systembindir {{ hyperkube_image_repo }}:{{ hyperkube_image_tag }} /usr/bin/cmp /hyperkube /systembindir/kubelet"
+  register: kubelet_task_compare_result
+  until: kubelet_task_compare_result.rc in [0,1,2]
+  retries: 4
+  delay: "{{ retry_stagger | random + 3 }}"
+  changed_when: false
+  failed_when: "kubelet_task_compare_result.rc not in [0,1,2]"
+  tags:
+    - hyperkube
+    - upgrade
+
 - name: install | Copy kubelet from hyperkube container
   command: "{{ docker_bin_dir }}/docker run --rm -v {{ bin_dir }}:/systembindir {{ hyperkube_image_repo }}:{{ hyperkube_image_tag }} /bin/cp -f /hyperkube /systembindir/kubelet"
+  when: kubelet_task_compare_result.rc != 0
   register: kubelet_task_result
   until: kubelet_task_result.rc == 0
   retries: 4
   delay: "{{ retry_stagger | random + 3 }}"
-  changed_when: false
   tags:
     - hyperkube
     - upgrade