ansible 播放失败并出现错误 - 该任务包含一个带有未定义变量的选项

Question

以下 ansible 代码失败并出现错误：

The task includes an option with an undefined variable. The error was: 'storage_size_gb' is undefined

- debug:
    msg: "{{ mongo_output_withoutvar.stdout }}"

- set_fact:

   storage_size_gb: "{{ mongo_output_withoutvar.stdout | int }}"
   min_free_space_rec: "{{ min_free_space_pass | int }}"
   combined_output: "{{ storage_size_gb + min_free_space_rec }} GB"

输出：

TASK [debug] *******************************************************************

ok: [ip-10-236-75-137.ec2.internal] => {

    "msg": "25"
}

TASK [set_fact] ****************************************************************

fatal: [remotehostl]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'storage_size_gb' is undefined\\n\\nThe error appears to be in '/runner/project/backupmongodb.yml': line 220, column 7, but may\\nbe elsewhere in the file depending on the exact syntax problem.\\n\\nThe offending line appears to be:\\n\\n\\n    - set_fact:\\n      ^ here\\n"}

我尝试运行示例测试用例，但出现了相同的错误：

---

- hosts: localhost

  gather_facts: false

  vars:

    min_free_space_pass: "30"

  tasks:

    - set_fact:

        storage_size_gb: 40
        min_free_space_rec: "{{ min_free_space_pass | int }}"
        combined_output: "{{ storage_size_gb + min_free_space_rec }} GB"

 

    - debug:
        var: combined_output

运行：

ansible-playbook sample.yml

输出：

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

TASK [set_fact] ***************************************************************************************************************

Wednesday 11 October 2023  02:41:29 -0500 (0:00:00.055)       0:00:00.055 *****

fatal: [localhost]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'storage_size_gb' is undefined\n\nThe error appears to be in '/home/wladmin/testset.yml': line 7, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n  tasks:\n    - set_fact:\n      ^ here\n"}

PLAY RECAP ********************************************************************************************************************

localhost                  : ok=0    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0

您能建议我如何克服这个错误吗？

Answer 1

该错误来自于您在同一个

set_fact

任务中声明并使用相同的变量，如@β.εηοιτ.βε 评论中所报告的那样。同时，这里绝对没有任何正当理由使用

set_fact

。以下剧本应该可以帮助您继续前进：

- hosts: localhost
  gather_facts: false

  vars:
    min_free_space_pass: 30
    storage_size_gb: 40
    combined_output: "{{ storage_size_gb | int + min_free_space_pass | int }} GB"

  tasks:
    - debug:
        var: combined_output