failed_when 在 ansible 中带有 msg

Question

我正在尝试验证通过 dig 完成的查找结果，但收到错误消息。
有人可以帮我吗？

  - name: Simple A record (IPV4 address) lookup for {{ kubeapi_server }}
    debug: msg="{{ lookup('dig', '{{ kubeapi_server }}' )}}"
  - debug:
      msg:
      - "DNS A Record for {{ lookup('dig', '{{ kubeapi_server }}' )}}"
    failed_when: msg.stdout != ""

输出

TASK [0_test : debug] ******************************************************
fatal: [target1]: FAILED! => {"msg": "The conditional check 'msg.stdout != \"\"' failed. The error was: error while evaluating conditional (msg.stdout != \"\"): 'msg' is undefined"}

Answer 1

通过简单地将整个查找分配给变量然后 == 来查看它是否为空来解决它。

      - name: Validate DNS record lookup for {{ kubeapi_server }}
        debug: msg="{{ lookup('dig', '{{ kubeapi_server }}' )}}"
        vars:
          variable: "{{ lookup('dig', '{{ kubeapi_server }}' )}}"
        failed_when: variable == ''
    ```