1

What I'm looking for is a task (or tasks) to read whatever .yml files exist in a specified folder and combine them into a file containing all the variables. For example:

pets/steves_pets.yml:

cats:
  - spot
  - snowy
hamsters:
  - mephistopheles

And

pets/jacks-pets.yml:

dogs:
  - rex
  - woof
hamsters:
  - prometheus

Becomes

wherever/all-pets.yml:

cats:
  - spot
  - snowy
dogs:
  - rex
  - woof
hamsters:
  - mephistopheles
  - prometheus

In fact it's not even necessary to generate an all-pets.yml - as long as the full combined list is available to Ansible for use in roles / tasks. But a combined list file approach would be fine if easier.

Any pointers would be greatly appreciated!

0

Sounds like you want the combine filter.

You could read each file into a specific variable, then use the combine filter to create all-pets. At that point, it would be in memory of course, so you might want to use the answer to this question to write it to a file:

- name: Read vars
  include_vars:
    file: "pets/{{ item }}_pets.yml"
    var: "{{ item }}"
  loop:
    - steves
    - jacks

- name: Combine vars
  set_fact:
    all_pets: {{ steves | combine(jacks) }}


- name: Write the file
  copy:
    content: "{{ all_pets | to_yaml }}"
    dest: pets/all_pets.yml
6
  • Many thanks for this but the folder could actually contain a large number of files so can't really type out each - ideally it should just load every file in the folder. – Sam Jul 31 '19 at 7:21
  • 1
    In that case you can use a fileglob in the include_vars but the same strategy should hold for combining the cars. However if there are so many files, perhaps a vars plugin should be considered for combining them efficiently. It's a cost benefit trade-off – Bruce Becker Jul 31 '19 at 7:25
  • Thanks Bruce, think I've got it (maybe) for with_fileglob in the first task and the third looks straightforward enough, but how do I use the combine bit if not specifying steves etc? – Sam Jul 31 '19 at 9:33
  • You should be able to use loop control to reference the individual vars during the loop - docs.ansible.com/ansible/latest/user_guide/… – Bruce Becker Jul 31 '19 at 9:47
  • 1
    In this particular case, you might be able to obtain what you want using hash_behavior=merge in ansible.cfg – Zeitounator Dec 29 '19 at 10:57
0

I think you can just include_vars at directory level with dir

tasks:
  - name: "Read my pets from pets folder"
    include_vars:
      dir: "pets"
      name: all_pets

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