Ansible 三元过滤器用法

Question

这可能是一个简单的。我正在使用 Ansible 中的三元过滤器来优化正在检查多个路径的剧本，然后在找到该路径时动态设置该路径的事实，但在 Windows 中。

这是剧本：

---
    - name: Check if D drive exists
      win_stat:
        path: D:\
      register: d_dir

    - name: Create app installation in d drive
      win_file:
        path: D:\app
        state: directory
      when: d_dir.stat.exists

    - name: Check for deployment directory
      win_stat:
        path: C:\app
      register: deployment_dir

    - name: Create Splunk folder in deployment dir
      win_file:
        path: C:\app\someapp
        state: directory
      when: deployment_dir.stat.exists

    - name: Create temporary dir if none of the directories exists
      win_file:
        path: C:\temp
        state: directory
      when: not install_dir.stat.exists and not deployment_dir.stat.exists

    - name: Set Splunk install directory dynamically
      set_fact:

        splunk_win_forwarder_install_dir: "{{ install_dir.stat.exists | ternary('D:\\app\\', (deployment_dir.stat.exists | ternary('C:\\app\\someapp\\', 'C:\\temp\\'))) }}"
    

但是，当我以这种方式使用三元时，它返回一个错误说明：

{
    "exception": "Traceback (most recent call last):\n  File \"/usr/lib/python2.7/site-packages/ansible/executor/task_executor.py\", line 592, in _execute\n    self._task.post_validate(templar=templar)\n  File \"/usr/lib/python2.7/site-packages/ansible/playbook/task.py\", line 299, in post_validate\n    super(Task, self).post_validate(templar)\n  File \"/usr/lib/python2.7/site-packages/ansible/playbook/base.py\", line 431, in post_validate\n    value = templar.template(getattr(self, name))\n  File \"/usr/lib/python2.7/site-packages/ansible/template/__init__.py\", line 663, in template\n    disable_lookups=disable_lookups,\n  File \"/usr/lib/python2.7/site-packages/ansible/template/__init__.py\", line 618, in template\n    disable_lookups=disable_lookups,\n  File \"/usr/lib/python2.7/site-packages/ansible/template/__init__.py\", line 846, in do_template\n    data = _escape_backslashes(data, myenv)\n  File \"/usr/lib/python2.7/site-packages/ansible/template/__init__.py\", line 147, in _escape_backslashes\n    for token in jinja_env.lex(d2):\n  File \"/var/lib/awx/venv/ansible/lib/python2.7/site-packages/jinja2/lexer.py\", line 739, in tokeniter\n    name, filename)\nTemplateSyntaxError: unexpected char u'\\\\' at 116\n  line 1\n",
    "changed": false,
    "_ansible_no_log": false
}

这是我试过的。我认为此错误指向正确转义 Windows 路径。我尝试了以下操作：

    - name: Set Splunk install directory dynamically
      set_fact:

        splunk_win_forwarder_install_dir: "{{ install_dir.stat.exists | ternary('D:\\\\app\\\\', (deployment_dir.stat.exists | ternary('C:\\\\app\\\\someapp\\\\', 'C:\\\\temp\\\\'))) }}"

有效，但问题是：

{
    "_ansible_no_log": false,
    "msg": "the file at the local path C:\\\\app\\\\someapp\\\\app.msi cannot be reached",
    "changed": false,
    "reboot_required": false
}

--------尝试 2---------------------------------------- --------------

    - name: Set Splunk install directory dynamically
      set_fact:

        splunk_win_forwarder_install_dir: "{{ install_dir.stat.exists | ternary(\'D:\\app\\\', (deployment_dir.stat.exists | ternary(\'C:\\app\\someapp\\\', \'C:\\temp\\\'))) }}"

（ps我尝试了多次其他尝试，我只是尽力简化这个）

第一次尝试补丁有点奏效，路径解析为

C:\\\\app\\\\someapp

。所以看起来逃脱是有效的，然而，它实际上被解析为

'\\\\'

而不是简单的

c:\

。通常我会简单地使用

'\\'

来逃避，但是使用这个过滤器，它在使用 Windows 路径时似乎有点不同。有什么建议吗？