Add improvement to roles

Former-commit-id: 0237a52f

roles/gpu/tasks/main.yml.bkup

----
-- name: install deps 
-  yum: name={{ item }} state=installed
-  sudo: true
-  with_items:
-    - gcc
-    - perl
-    - wget
-    - pciutils
-    - kernel-headers
-    - kernel-devel 
-    - xterm
-    - libX11-common
-    - libX11-devel
-    - libX11
-    - xorg-x11-server-common
-    - xorg-x11-util-macros
-    - xorg-x11-server-utils
-    - xorg-x11-font-utils
-    - xorg-x11-server-Xorg
-    - xorg-x11-glamor
-    - xorg-x11-xinit
-    - xorg-x11-utils
-    - xorg-x11-xauth
-    - xorg-x11-proto-devel
-    - xorg-x11-xkb-utils
-
-- name: install development tools
-  yum: name="@Development Tools" state=installed
-  become: true
-  become_user: root
-
-- name: disable nouveau
-  template: src=blacklist-nouveau.conf.j2 dest=/etc/modprobe.d/blacklist-nouveau.conf
-  become: true
-  become_user: root
-
-- name: template unit for for persistenced
-  template: src=nvidia-persistenced.service dest=/etc/systemd/system/nvidia-persistenced.service
-  become: true
-  become_user: root
-
-- name: create the nvidia-persistenced user
-  user: name=nvidia-persistenced state=present system=yes shell=/bin/false
-  become: true
-  become_user: root
-
-
-- name: remove nouveau
-  modprobe: name=nouveau state=absent
-  become: true 
-  become_user: root
-
-- name: get kernel version
-  shell: uname -r
-  register: kernel_version
-  check_mode: no
-
-
-- name: check nvidia driver
-  stat: path="/lib/modules/{{ kernel_version.stdout }}/kernel/drivers/video/nvidia.ko"
-  register: nvidia_driver
-  ignore_errors: true
-
-- name: set default driver version
-  set_fact: 
-    installed_driver_version: '0.0'
-
-- name: check nvidia driver version
-  shell: 'nvidia-smi | grep -Po "Driver Version: \K\S+"'
-  register: installed_driver_version
-  when: nvidia_driver.stat.exists
-  check_mode: no
-
-- name: debug - installed nvidia driver version
-  debug:
-    msg: "{{ installed_driver_version }} "
-
-- name: set install default
-  set_fact: 
-    install_driver: false
-
-- name: set uninstall default
-  set_fact: 
-    uninstall_driver: false
-
-- name: set install
-  set_fact: 
-    install_driver: true
-  when: not nvidia_driver.stat.exists or not installed_driver_version.stdout_lines[0] == nvidia_version
-
-- name: set uninstall
-  set_fact: 
-    uninstall_driver: true
-  when: nvidia_driver.stat.exists and not installed_driver_version.stdout_lines[0] == nvidia_version
-
-- name: Unload nvidia driver
-  shell: rmmod nvidia_uvm nvidia_drm nvidia_modeset nvidia || true
-  sudo: true
-  when: install_driver
-
-- name: stop the persistence daemon
-  service: name=nvidia-persistenced state=stopped
-  become: true
-  become_user: root
-  when: uninstall_driver
-
-- name: kill any X processes
-  shell:  ps ax | grep "X :0" | grep -v grep | cut -f 1 -d " " | xargs -I{} kill -9 {}
-  become: true
-  become_user: root
-  when: uninstall_driver
-
-- name: get old nvidia driver
-  get_url: url=http://consistency0/src/NVIDIA-Linux-x86_64-{{ installed_driver_version.stdout_lines[0] }}.run dest=/tmp/NVIDIA-Linux-x86_64-{{ installed_driver_version.stdout_lines[0] }}.run
-  become: true
-  become_user: root
-  when: uninstall_driver
-  ignore_errors: true  
-
-- name: uninstall old nvidia driver
-  shell: chmod 755 /tmp/NVIDIA-Linux-x86_64-{{ installed_driver_version.stdout_lines[0] }}.run; /tmp/NVIDIA-Linux-x86_64-{{ installed_driver_version.stdout_lines[0] }}.run --uninstall --silent
-  become: true
-  become_user: root
-  when: uninstall_driver
-
-- name: clean up old driver installation file
-  file:
-    state: absent
-    path: /tmp/NVIDIA-Linux-x86_64-{{ installed_driver_version.stdout_lines[0] }}.run
-  become: true
-  become_user: root
-  ignore_errors: true
-
-- name: get nvidia driver 
-  get_url: url=http://consistency0/src/NVIDIA-Linux-x86_64-{{ nvidia_version }}.run dest=/tmp/NVIDIA-Linux-x86_64-{{ nvidia_version }}.run
-  become: true
-  become_user: root
-  when: install_driver
-
-#- name: Copy boot file
-#  template: src=grub.conf.j2 dest=/boot/grub/grub.conf 
-#  sudo: true
-#
-#- name: Copy X config file
-#  template: src=xorg.conf.j2 dest=/etc/X11/xorg.conf 
-#  sudo: true
-
-- name: Copy xserver file
-  template: src=xserver.j2 dest=/etc/pam.d/xserver
-  become: true
-  become_user: root
-
-- name: build nvidia driver 
-  shell: chmod 755 /tmp/NVIDIA-Linux-x86_64-{{ nvidia_version }}.run; /tmp/NVIDIA-Linux-x86_64-{{ nvidia_version }}.run --silent 
-  become: true
-  become_user: root
-  when: install_driver
-
-- name: set the GOM
-  shell: nvidia-smi --gom=0
-  become: true
-  become_user: root
-
-- name: enable persistenced on boot
-  service: name=nvidia-persistenced state=started enabled=yes
-  become: true
-  become_user: root
-
-- name: Configure xorg.conf with nvidia-xconfig so xorg.conf matches gpu number
-  shell: /usr/bin/nvidia-xconfig -a --use-display-device=none --preserve-busid
-  become: true
-  become_user: root
-  args: 
-    creates: /etc/X11/xorg.conf
-
-#- name: Template xorg.conf for nodes with one GPU
-#  template: src=xorg.conf.j2 dest=/etc/X11/xorg.conf
-#  become: true
-#  become_user: root
-#  when: template_xorgconf is defined and template_xorgcon
-
-- name: run nvidia-xconf-gen
-  script: scripts/nvidia-xconf-gen.py
-  register: nvidiacards
-  check_mode: no
-
-- name: set env for nvidia_card_lists
-  set_fact: 
-    nvidiacardslist: "{{ nvidiacards.stdout | from_json }}"
-
-- name: generate nvidia-xorg-conf
-  sudo: true
-  template:
-    src: xorg.conf.j2
-    dest: "{{ item['filename'] }}"
-  with_items: "{{ nvidiacardslist }}"
-
-- name: clean up nvidia driver installation file
-  file:
-    state: absent
-    path: /tmp/NVIDIA-Linux-x86_64-{{ nvidia_version }}.run
-  become: true
-  become_user: root
-  ignore_errors: true
-