ansible - 防止 Ansible 中变量转换为 bool

Question

当用户向 vars_prompt 提供一些输入时，如何有条件地运行任务。问题是，我的变量被视为 bool，并且 yes 和 no 永远不会匹配。

- hosts: localhost
  gather_facts: no
  vars_prompt:
    - name: "myvar"
      prompt: "Do you want to proceed(yes/no)?"
      private: no

  tasks:

    - name: "Set variable"
      set_fact:
        myvar: "{{ myvar }}"

    - name: "Conditional task"
      shell: echo "conditional action"
      when: "'yes' in myvar"

当我运行上面的代码时收到以下错误消息:

fatal: [localhost]: FAILED! => {}

消息:

The conditional check ''yes' in myvar' failed. The error was: Unexpected templating type error occurred on ({% if 'yes' in myvar %} True {% else %} False {% endif %}): argument of type 'bool' is not iterable

The error appears to have been in '/home/monk/samples/user.yml': line 14, column 7, but may
be elsewhere in the file depending on the exact syntax problem.

The offending line appears to be:


    - name: "Conditional task"
      ^ here

Answer 1

当您使用 set_fact 重新影响变量时，实际上就完成了 bool 值的转换，这是不需要的(除非您想在后续游戏中使用它)。以下内容实际上如您所期望的那样工作:

---
- hosts: localhost
  gather_facts: false
  vars_prompt:
    - name: myvar
      prompt: "yes or no?"
      private: no
  tasks:
    - debug:
        msg: yes was entered
      when: "'yes' in myvar"

同时，这可能不是解决您的问题的最佳方法。我宁愿将答案转换为 bool 来直接对其进行测试(如果您需要在下一个游戏中进行提示，您最终可以再次使用 set_fact )。

---
- hosts: localhost
  gather_facts: false
  vars_prompt:
    - name: myvar
      prompt: "yes or no?"
      private: no
  tasks:
    - debug:
        msg: yes was entered
      when: myvar | bool