如何使用 wait_for 模块调试失败端口的 Ansible dict？

Question

我编写了以下剧本来获取失败的端口状态。

  - name: Check  port status
    wait_for:
     host: 127.0.0.1
     port: "{{ item }}"
     timeout: 2
     state: started
    ignore_errors: yes
    with_items:
     - 80
     - 22
     - 8080
    register: wait_result

  - debug:
     msg: "{{ 'Failed with message: ' ~ wait_result.msg  if wait_result.failed else 'Success' }}"

从调试日志中获取时msg我无法获取超时消息。

PLAY [mysrv] ************************************************************************************************************************************

TASK [Gathering Facts] **************************************************************************************************************************
ok: [localhost]

TASK [Check Nagios port status] *****************************************************************************************************************
ok: [localhost] => (item=80)
ok: [localhost] => (item=22)
failed: [localhost] (item=8080) => {"ansible_loop_var": "item", "changed": false, "elapsed": 2, "item": 8080, "msg": "Timeout when waiting for 127.0.0.1:8080"}
...ignoring

TASK [debug] ************************************************************************************************************************************
ok: [localhost] => {
    "msg": "Failed with message: One or more items failed"
}

PLAY RECAP **************************************************************************************************************************************
localhost                  : ok=3    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=1

有人可以帮忙修改我的代码吗？

Answer 1

例如，您可以编写消息

    - debug:
        msg: |
          {% for i in wait_result.results|select('failed') %}
          {{ i.msg }}
          {% endfor %}

或者创建一个列表并稍后使用

  failed_msg: "{{ wait_result.results|
                  select('failed')|
                  map(attribute='msg')|list }}"

---

完整测试剧本的示例

- hosts: localhost

  vars:

    failed_msg: "{{ wait_result.results|
                    select('failed')|
                    map(attribute='msg')|list }}"

  tasks:

    - name: Check  port status
      wait_for:
        host: 127.0.0.1
        port: "{{ item }}"
        timeout: 2
        state: started
      register: wait_result
      ignore_errors: yes
      loop: [22, 25, 53, 80]

    - debug:
        var: wait_result
      when: debug|d(false)|bool

    - debug:
        var: failed_msg

    - debug:
        msg: |
          {% for i in wait_result.results|select('failed') %}
          {{ i.msg }}
          {% endfor %}

    - assert:
        that: wait_result.results|select('failed')|length == 0
        fail_msg: |
          {% for i in wait_result.results|select('failed') %}
          {{ i.msg }}
          {% endfor %}
        success_msg: All services started.

给出

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

TASK [Check  port status] ********************************************************************
ok: [localhost] => (item=22)
ok: [localhost] => (item=25)
failed: [localhost] (item=53) => changed=false 
  ansible_loop_var: item
  elapsed: 2
  item: 53
  msg: Timeout when waiting for 127.0.0.1:53
failed: [localhost] (item=80) => changed=false 
  ansible_loop_var: item
  elapsed: 2
  item: 80
  msg: Timeout when waiting for 127.0.0.1:80
...ignoring

TASK [debug] *********************************************************************************
skipping: [localhost]

TASK [debug] *********************************************************************************
ok: [localhost] => 
  failed_msg:
  - Timeout when waiting for 127.0.0.1:53
  - Timeout when waiting for 127.0.0.1:80

TASK [debug] *********************************************************************************
ok: [localhost] => 
  msg: |-
    Timeout when waiting for 127.0.0.1:53
    Timeout when waiting for 127.0.0.1:80

TASK [assert] ********************************************************************************
fatal: [localhost]: FAILED! => changed=false 
  assertion: wait_result.results|select('failed')|length == 0
  evaluated_to: false
  msg: |-
    Timeout when waiting for 127.0.0.1:53
    Timeout when waiting for 127.0.0.1:80

PLAY RECAP ***********************************************************************************
localhost: ok=2    changed=0    unreachable=0    failed=1    skipped=1    rescued=0    ignored=1