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ansible - Ansible：使用 json_query 在任意深度寻找具有已知值的已知键？

问题描述

是否可以使用 来完成这样的事情json_query？json_query经过相当多的搜索（无论是 with还是 with jmespath），我都找不到任何东西。我能找到的一切都假设 的结构dict/json是已知的（即搜索键的深度是已知的）。

示例 JSON 输入：

{
  "changed": false,
  "msg": {
    "Data": {
      "Message": "returned status code doesn't match with the expected success code",
      "Status": "Failed",
      "StatusCode": 409
    },
    "Message": "none",
    "Status": "Failed",
    "StatusCode": 409,
    "error": {
      "error": {
        "@Message.ExtendedInfo": [
          {
            "Message": "Server is already powered OFF.",
            "MessageArgs": [

            ],
            "MessageArgs@odata.count": 0,
            "MessageId": "IDRAC.1.6.PSU502",
            "RelatedProperties": [

            ],
            "RelatedProperties@odata.count": 0,
            "Resolution": "No response action is required.",
            "Severity": "Informational"
          }
        ],
        "code": "Base.1.0.GeneralError",
        "message": "A general error has occurred. See ExtendedInfo for more information"
      }
    },
    "retval": true
  }
}

我想检查是否存在值为Server is already power OFF的关键消息。无需假设 JSON 的键/结构的深度。

标签： ansibleansible-2.xjmespathjson-query

解决方案

使用自定义filter_plugins

$ ls -1 filter_plugins/*.py
filter_plugins/dict_utils.py
filter_plugins/list_methods.py

下面的任务

  vars:
    my_key: Message
    my_value: Server is already powered OFF
  tasks:
    - debug:
        msg: "{{ item.key }}: {{ item.value is search(my_value)|
                                 ternary(my_value, 'NOT FOUND') }}"
      loop: "{{ input|dict_flatten|dict2items }}"
      when: item.key.split('.')|list_reverse|first == my_key

给

"msg": "msg.Data.Message: NOT FOUND"
"msg": "msg.error.error.@Message.ExtendedInfo.0.Message: Server is already powered OFF"
"msg": "msg.Message: NOT FOUND"

细节

来自dict_utils的过滤器dict_flatten示例如下

vars:
dict4: {
      "a":{
        "r": 1,
        "s": 2,
        "t": 3
        },
      "b":{
        "u": 1,
        "v": {
            "x": 1,
            "y": 2,
            "z": [ 3, 4, 5 ]
          },
        "w": 3
        }
      }
tasks:
  - debug:
      var: dict4_flatten
    vars:
      dict4_flatten: "{{ dict4|dict_flatten('.') }}"

给

"dict4_flatten": {
    "a.r": 1, 
    "a.s": 2, 
    "a.t": 3, 
    "b.u": 1, 
    "b.v.x": 1, 
    "b.v.y": 2, 
    "b.v.z.0": 3, 
    "b.v.z.1": 4, 
    "b.v.z.2": 5, 
    "b.w": 3
}

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