如何等待一个目录存在于ansible

Question

我想暂停我的 ansible 剧本，直到某个目录存在。 我知道我可以检查文件是否存在

    - name: Wait until the file /home/myfile.txt is present before continuing
      wait_for:
        path: /home/myfile.txt
        state: present

但这似乎不适用于目录。

我也知道我可以用这个示例代码检查一个目录

    # Determine if a path exists and is a directory.  Note that we need to test
    # both that p.stat.isdir actually exists, and also that it's set to true.
    - name: Get stats of the FS object
      ansible.builtin.stat:
        path: /path/to/something
      register: p
    - name: Print a debug message
      ansible.builtin.debug:
        msg: "Path exists and is a directory"
      when: p.stat.isdir is defined and p.stat.isdir

是否可以将这两种方法结合起来？

Answer 1

一个最小的示例剧本

---
- hosts: test
  become: false
  gather_facts: false

  tasks:

  - name: Wait for trigger directory
    ansible.builtin.wait_for:
      path: "/home/{{ ansible_user }}/trigger/"
      state: present
    register: result

  - name: Show result
    debug:
      var: result

跑步

TASK [Wait for trigger directory] *********************************************
ok: [test.example.com]
Thursday 02 March 2023  09:09:25 +0100 (0:00:08.185)       0:00:08.223 ********

并在远程节点上创建名为

trigger

的目录后

user@test:~$ pwd
/home/user
user@test:~$ mkdir trigger

将导致正确的预期行为

TASK [Show result] ************************************************************
ok: [test.example.com] =>
  result:
    changed: false
    elapsed: 7
    failed: false
    gid: 1234567890
    group: ansible_users
    match_groupdict: {}
    match_groups: []
    mode: '0755'
    owner: user
    path: /home/user/trigger/
    port: null
    search_regex: null
    secontext: unconfined_u:object_r:user_home_t:s0
    size: 4096
    state: directory
    uid: 123456789

PLAY RECAP *********************************************************************
test.example.com : ok=2    changed=0    unreachable=0    failed=0 ...

Playbook run took 0 days, 0 hours, 0 minutes, 8 seconds
Thursday 02 March 2023  09:09:25 +0100 (0:00:00.107)       0:00:08.330 *********
================================================================================
Wait for trigger directory ----------------------------------------------- 8.19s
Show result -------------------------------------------------------------- 0.11s

更多文档

• wait_for

  模块 - 在继续之前等待条件 - 返回值

  elapsed

  等待时经过的秒数