ansible 获取 rpm 版本的变量

Question

我将服务名称作为外部变量。我想找到该服务的 rpm 版本。

我使用了以下剧本： 任务：

   - name: get the rpm or apt package facts
     package_facts:
      manager: "auto"

   - name: get version of current installed rpm
     set_fact:
       rpm_version:  "{{ packages['{{ service_name }}'] }}"


   - name: print version of current installed rpm
     debug:
       msg: "{{ rpm_version }}"

我收到以下错误：

TASK [get version of current installed rpm] ************************************************************************************************************************************************
fatal: [10.20.10.74]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'dict object' has no attribute '{{ service_name }}'\n\nThe error appears to be in '/home/m/my-playbook.yml': line 11, column 6, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n   - name: get version of current installed rpm\n     ^ here\n"}

我尝试使用转义字符，例如 \'，但它并没有真正帮助。

如何将变量传递给包字典？

当我用硬编码名称替换 {{ service_name }} 时，它按预期工作

Answer 1

试试这个语法：

   - name: get version of current installed rpm
     set_fact:
       rpm_version: "{{ ansible_facts.packages[service_name] }}"