CODEWITHSUNDEEP
ansible
Peter Kahn
Peter Kahn

Reputation: 13036

Change ansible inventory based on variables

Can a playbook load inventory list from variables? So I can easily customize the run based on chosen environment?

  tasks:
  - name: include environment config variables
    include_vars:
      file: "{{ item }}"
    with_items:
      - "../../environments/default.yml"
      - "../../environments/{{ env_name }}.yml"

- name: set inventory
  set_fact:
     inventory.docker_host = " {{ env_docker_host }}"

Upvotes: 1

Views: 978

Answers (2)

Peter Kahn
Peter Kahn

Reputation: 13036

As I'm in ansible 2.3 I can't use the add_host module (see Jack's answer and add_host docs) and that would be a superior solution. Therefore, I'll use a different trick to augment an existing ansible inventory file, reload and use it.

hosts.inv

[remotehosts]

main.yml

- hosts: localhost
  pre_tasks:
    - name: include environment config variables
      include_vars:
        file: "{{ item }}"
      with_items:
        - "../environments/default.yml"
        - "../environments/{{ env_name }}.yml"
    - name: inventory facts
      run_once: true
      set_fact:
        my_host: "{{ env_host_name }}"

    - name: update inventory for env
      local_action: lineinfile
        path=hosts.inv
        regexp={{ my_host }}
        insertafter="[remotehosts]" line={{ my_host }}

    - meta: refresh_inventory

- hosts: remotehosts
...

The pretasks process the environments yml with all the variable replacement etc and use that to populate hosts.inv prior to reloading via refresh_inventory

Any tasks defined beneath - hosts: remotehosts would execute on the remote host or hosts.

Upvotes: 1

Jack
Jack

Reputation: 6168

Yes. Use the add_host module: https://docs.ansible.com/ansible/latest/modules/add_host_module.html

Upvotes: 1

Related Questions