Ansible如何本地获取目录最新文件用于include_vars？

需要为变量设置默认值，该变量对应../roles/somerole/files/目录下最后添加的文件，但直接使用find模块会在远程主机而非本地查找路径，导致报错。

原代码示例：

- hosts: all
  become: yes

  pre_tasks:
    - name: Get last added file
      find: 
        paths: "../roles/somerole/files/"
      register: found_files

    - name: Include vars from latest file in above folder
      include_vars: "{{ found_files.files | sort(attribute='mtime',reverse=true) | first }}"

执行输出：

[WARNING]: Skipped '../roles/somerole/files/' path due to this access issue: '../roles/somerole/files/' is not a directory
ok: [1.1.1.1] => {
    "ansible_facts": {
        "discovered_interpreter_python": "/usr/bin/python3"
    },
    "changed": false,
    "examined": 0,
    "files": [],
    "invocation": {
        "module_args": {
            "age": null,
            "age_stamp": "mtime",
            "contains": null,
            "depth": null,
            "excludes": null,
            "file_type": "file",
            "follow": false,
            "get_checksum": false,
            "hidden": false,
            "paths": [
                "../roles/somerole/files/"
            ],
            "patterns": [
                "*"
            ],
            "read_whole_file": false,
            "recurse": false,
            "size": null,
            "use_regex": false
        }
    },
    "matched": 0,
    "msg": "Not all paths examined, check warnings for details",
}

要在本地执行文件查找操作，有两种常用实现方式：

方式一：使用delegate_to: localhost #

给find模块添加delegate_to: localhost参数，强制任务在本地执行，同时搭配run_once: true避免重复执行：

- hosts: all
  become: yes

  pre_tasks:
    - name: Get last added file locally
      find: 
        paths: "../roles/somerole/files/"
      register: found_files
      delegate_to: localhost
      run_once: true

    - name: Include vars from latest local file
      include_vars:
        file: "{{ found_files.files | sort(attribute='mtime', reverse=true) | first.path }}"
      delegate_to: localhost
      run_once: true

方式二：使用local_action #

通过local_action直接指定任务在本地执行，语法更直观：

- hosts: all
  become: yes

  pre_tasks:
    - name: Get last added file locally
      local_action:
        module: find
        paths: "../roles/somerole/files/"
      register: found_files
      run_once: true

    - name: Include vars from latest local file
      local_action:
        module: include_vars
        file: "{{ found_files.files | sort(attribute='mtime', reverse=true) | first.path }}"
      run_once: true

关键注意点 #

• 确认../roles/somerole/files/路径在本地存在，且Ansible执行用户有访问权限
• run_once: true可避免在所有远程主机重复执行本地任务，提升执行效率
• 通过.path获取文件完整路径，确保include_vars能正确读取本地文件

内容的提问来源于stack exchange，提问作者Iryna Nazaruk