Dell-Omnia-Clusters-HPC-AI/appliance/roles/inventory/files/create_inventory.yml

# Copyright 2020 Dell Inc. or its subsidiaries. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
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#     http://www.apache.org/licenses/LICENSE-2.0
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---

- name: Find reachable hosts
  hosts: all
  gather_facts: false
  ignore_unreachable: true
  ignore_errors: true
  tasks:
    - name: Check for reachable nodes
      command: ping -c1 {{ inventory_hostname }}
      delegate_to: localhost
      register: ping_result
      ignore_errors: yes
      changed_when: false

    - name: Group reachable hosts
      group_by:
        key: "reachable"
      when: "'100% packet loss' not in ping_result.stdout"

- name: Get provision password
  hosts: localhost
  connection: local
  gather_facts: false
  tasks:
    - name: Include vars file of inventory role
      include_vars: ../vars/main.yml

- name: Set hostname on reachable nodes and gather facts
  hosts: reachable
  gather_facts: False
  remote_user: "{{ cobbler_username }}"
  vars:
    ansible_password: "{{ cobbler_password }}"
    ansible_become_pass: "{{ cobbler_password }}"
    ansible_ssh_common_args: '-o StrictHostKeyChecking=no'
  tasks:
    - name: Setup
      setup:
       filter: ansible_*

    - name: Set the system hostname
      hostname:
        name: "compute{{ inventory_hostname.split('.')[-2] + '-' + inventory_hostname.split('.')[-1] }}"
      register: result_name

    - name: Add new hostname to /etc/hosts
      lineinfile:
        dest: /etc/hosts
        regexp: '^127\.0\.0\.1[ \t]+localhost'
        line: "127.0.0.1 localhost 'compute{{ inventory_hostname.split('.')[-2] + '-' + inventory_hostname.split('.')[-1] }}'"
        state: present

- name: Update inventory
  hosts: localhost
  connection: local
  gather_facts: false
  tasks:
    - name: Update inventory file
      block:
        - name: Fetch facts and add new hosts
          include_tasks: add_host.yml
          with_items: "{{ groups['reachable'] }}"
      when: "'reachable' in groups"

    - name: Show unreachable hosts
      debug:
        msg: "{{ host_unreachable_msg }} + {{ groups['ungrouped'] }}"
      when: "'ungrouped' in groups"