在本例中，我使用了以下树：

.
├── test.yml
└── vars
    └── merge_vars
        ├── file1.yml
        └── file2.yml

Var文件与您问题中的相同。

示例攻略：

---
- hosts: localhost
  gather_facts: false

  tasks:
    - name: import vars from files
      include_vars:
        dir: vars/merge_vars
        name: merged_vars

    - debug: 
        var: merged_vars

提供：

PLAY [localhost]******************************************************************************************************************

TASK [import vars from files]*****************************************************************************************************
ok: [localhost]

TASK [debug]**********************************************************************************************************************
ok: [localhost] => {
    "merged_vars": {
        "abc": "cat",
        "def": "airplane",
        "test": "blue"
    }
}

PLAY RECAP************************************************************************************************************************
localhost                  : ok=2    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0