Ansible：树结构上的交互

Question

我想迭代树结构。

如何仅迭代level1和level2？（我希望看到name和level0之间的相关性如下图所示）

也许结构是错的？（json | dict列表或其他？）

---
- name: test
  hosts: localhost
  gather_facts: no
  vars:
   directories:
    - name: DIR1
      level0:
       - name: SUBDIR1
         level1:
           - name: SUBDIR11
             level2:
              - name: SUBDIR111
              - name: SUBDIR112
           - name: SUBDIR12
             level2:
              - name: SUBDIR121
              - name: SUBDIR122
       - name: SUBDIR2
       - name: SUBDIR3
    - name: DIR2
      level0:
       - name: SUBDIR1
       - name: SUBDIR2
       - name: SUBDIR3

  tasks:
  - name: Debug level0
    debug:
      msg: "DIR {{item.0.name}} Subdir {{item.1.name}}"
    loop: "{{ directories | subelements('level0') }}"

Answer 1

有四个嵌套列表。因此，需要两个嵌套循环，都带有子元素。例如，使用文件loop-item.yml中包含的任务

shell> cat loop-item.yml
- debug:
    msg: "{{ outer_item.0.name }} {{ outer_item.1.name }} {{ item.0.name }} {{ item.1.name }}"
  loop: "{{ outer_item.1.level1|default([])|subelements('level2') }}"

任务

  - include_tasks: loop-item.yml
    loop: "{{ directories|subelements('level0') }}"
    loop_control:
      loop_var: outer_item

给出嵌套列表的分解

    "msg": "DIR1 SUBDIR1 SUBDIR11 SUBDIR111"
    "msg": "DIR1 SUBDIR1 SUBDIR11 SUBDIR112"
    "msg": "DIR1 SUBDIR1 SUBDIR12 SUBDIR121"
    "msg": "DIR1 SUBDIR1 SUBDIR12 SUBDIR122"

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Q: "Maybe the structure is wrong ? ( json | list of dict or other ?)"

A:结构很好。只能迭代列表。无论如何，任何其他结构都必须转换为列表