ansible - 在ansible中获取Caller Playbook目录名

Question

我有两个剧本 pb1.yml 和 dir/pb2.yml。我正在从 pb1.yml 剧本中调用 pb2.yml。我需要打印调用 pb2.yml 剧本的目录的名称。

cat pb1.yml
---
  - hosts: localhost
    tasks:
      - debug: var={{ playbook_dir |basename }}

  - import_playbook: dir/pb2.yml

cat dir/pb2.yml
---
  - hosts: localhost
    tasks:
      - debug: var={{ playbook_dir |basename }}

在下面的示例中，我能够获取 pb2.yml 的目录名称，但我有兴趣从 中知道 pb1.yml 的目录名称>pb2.yml。

home/monk>ansible-playbook pb1.yml
PLAY [localhost] *******************************************************************************************************************************************************

TASK [Gathering Facts] *************************************************************************************************************************************************
ok: [localhost]

TASK [debug] ***********************************************************************************************************************************************************
ok: [localhost] => {
    "samples": "VARIABLE IS NOT DEFINED!"
}

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

TASK [Gathering Facts] *************************************************************************************************************************************************
ok: [localhost]

TASK [debug] ***********************************************************************************************************************************************************
ok: [localhost] => {
    "dir": "VARIABLE IS NOT DEFINED!"
}

PLAY RECAP *************************************************************************************************************************************************************
localhost                  : ok=4    changed=0    unreachable=0    failed=0

预期结果:

从pb2.yml，打印/home/monk/

Answer 1

要么变量被正确扩展并且使用参数msg打印值

  - debug:
      msg: "{{ playbook_dir|basename }}"

，或者变量用参数var打印，不展开

  - debug:
      var: playbook_dir|basename

---

说明

代码 {{ playbook_dir|basename }} 分别计算为“sample”或“dir”

tasks:
  - debug: var={{ playbook_dir|basename }}

这样的变量没有定义，播放会失败

"samples": "VARIABLE IS NOT DEFINED!

引自debug

var: A variable name to debug.Mutually exclusive with the msg option. Be aware that this option already runs in Jinja2 context and has an implicit {{ }} wrapping, so you should not be using Jinja2 delimiters unless you are looking for double interpolation.

“双插值”其实就是“间接寻址”。下面的戏

- hosts: localhost
  vars:
    x: y
    y: z
  tasks:
    - debug:
        var: "{{ x }}"

给予

ok: [localhost] => {
    "y": "z"
}