Tools/Ansible/Use Cases

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Ansible - Cas d'usage

Inclure des "tasks" à partir de fichier dynamiques

L'inclusion de tâches avec un nom de fichier dynamique est le plus souvent utilisée pour faire varier les tâches en fonction du système d'exploitation de l'hôte distant.

Prenons l'exemple suivant :

# ./roles/redis/tasks/main.yml

- name: install redis on Debian based distros 
  apt:
    name: redis-server
    state: present
    update_cache: true
  become: true
  when: ansible_os_family == 'Debian'

- name: ensure epel-release repo is installed on RHEL based distros
  yum:
    name: epel-release
    state: present
    update_cache: true
  become: true
  when: ansible_os_family == 'RedHat'

- name: install redis on RHEL based distros
  yum:
    name: redis
    state: present
    update_cache: true
  become: true
  when: ansible_os_family == 'RedHat'

Il peut être avantageusement factorisé en 3 tâches distinctes de la façon suivante :

---
# ./roles/redis/tasks/setup-Debian.yml

- name: install redis on Debian based distros 
  apt:
    name: redis-server
    state: present
    update_cache: true
  become: true
  when: ansible_os_family == 'Debian'

---
# ./roles/redis/tasks/setup-RedHat.yml

- name: ensure epel-release repo is installed on RHEL based distros
  yum:
    name: epel-release
    state: present
    update_cache: true
  become: true
  when: ansible_os_family == 'RedHat'

- name: install redis on RHEL based distros
  yum:
    name: redis
    state: present
    update_cache: true
  become: true
  when: ansible_os_family == 'RedHat'

# ./roles/redis/tasks/main.yml

- include_tasks: "setup-{{ ansible_os_family }}.yml"