[kubespray] Doc in contribute to guide user deploy k8s through kubespray

contrib/kubespray/nvidia-docker.yml

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+---
+- hosts: all
+  tasks:
+    - name: Add key
+      apt_key:
+        url: https://nvidia.github.io/nvidia-container-runtime/gpgkey
+        state: present
+
+    - name: add repo
+      get_url:
+        url: https://nvidia.github.io/nvidia-container-runtime/ubuntu16.04/nvidia-container-runtime.list
+        dest: /etc/apt/sources.list.d/nvidia-container-runtime.list
+        mode: 0644
+        owner: root
+        group: root
+
+    - name: Run the equivalent of "apt-get update" as a separate step
+      apt:
+        update_cache: yes
+
+    - name: install packages
+      apt:
+        name: nvidia-container-runtime
+        state: present
+        update_cache: yes
+      notify: reload docker

contrib/kubespray/nvidia-drivers.yml

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+---
+- hosts: all
+  tasks:
+    - name: Add the drivers repository to Ubuntu
+      apt_repository:
+        repo: ppa:graphics-drivers/ppa
+        state: present
+
+    - name: Run the equivalent of "apt-get update" as a separate step
+      apt:
+        update_cache: yes
+
+    - name: Install nvidia drivers, we will install 410 version
+      apt:
+        name: nvidia-410
+        state: present
+
+    - name: reboot vm
+      reboot:
+

contrib/kubespray/nvidia-persistenced-override.conf

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+
+[Service]
+ExecStart=
+ExecStart=/usr/bin/nvidia-persistenced --user root --persistence-mode --verbose

contrib/kubespray/nvidia-persistent-mode.yml

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+---
+- hosts: all
+  tasks:
+    - name: create persistenced override dir
+      file:
+        path: /etc/systemd/system/nvidia-persistenced.service.d/
+        state: directory
+        recurse: yes
+
+    - name: configure persistenced service to turn on persistence mode
+      copy:
+        src: nvidia-persistenced-override.conf
+        dest: /etc/systemd/system/nvidia-persistenced.service.d/override.conf
+
+    - name: enable persistenced
+      systemd:
+        name: nvidia-persistenced
+        enabled: yes
+
+    - name: perform nvidia smi
+      shell: nvidia-smi
+      args:
+        executable: /bin/bash