使用 Ansible 从 json 内容中获取特定的 dict 列表

Question

我花了很多时间终于没有得到我需要的东西，我的要求是如此复杂，所以我更愿意与你分享我的担忧::

我有这个 json.content 来解析它：

        "json": {
            "content": [
                {
                    "name": "machine1",
                    "hasChildren": false,
                    "resourceData": {
                        "entries": [
                            {
                                "value": {
                                    "type": "string",
                                    "value": "Red Hat Enterprise Linux 7 (64-bit)"
                                },
                                "key": "MachineGuestOperatingSystem"
                            },
                            {
                                "value": {
                                    "type": "string",
                                    "value": "Folder1"
                                },
                                "key": "VMware.VirtualCenter.Folder"
                            },
                            {
                                "value": {
                                    "type": "boolean",
                                    "value": true
                                },
                                "key": "Destroy"
                            }
                        ]
                    }
                },
                {

                    "name": "machine2",
                    "hasChildren": false,
                    "resourceData": {
                        "entries": [
                            {
                                "value": {
                                    "type": "string",
                                    "value": "Red Hat Enterprise Linux 7 (64-bit)"
                                },
                                "key": "MachineGuestOperatingSystem"
                            },
                            {
                                "value": {
                                    "type": "string",
                                    "value": "Folder2"
                                },
                                "key": "VMware.VirtualCenter.Folder"
                            },
                            {
                                "value": {
                                    "type": "boolean",
                                    "value": false
                                },
                                "key": "Destroy"
                            }
                        ]
                    }
                },
                {
                    "name": "machine3",
                    "hasChildren": false,
                    "resourceData": {
                        "entries": [
                            {
                                "value": {
                                    "type": "string",
                                    "value": "Windows Server 2016 or later (64-bit)"
                                },
                                "key": "MachineGuestOperatingSystem"
                            },
                            {
                                "value": {
                                    "type": "string",
                                    "value": "Folder3"
                                },
                                "key": "VMware.VirtualCenter.Folder"
                            },
                            {
                                "value": {
                                    "type": "boolean",
                                    "value": true
                                },
                                "key": "Destroy"
                            }
                        ]
                    }
                }
            ]
        }

我想输出类似的东西：

[{"name":"machine1", "OsName": "Red Hat Enterprise Linux 7 (64-bit)", "Folder": "Folder1"}, {"name":"machine2", "OsName": "Red Hat Enterprise Linux 7 (64-bit)", "Folder": "Folder2"},
{"name":"machine3", "OsName": "Windows Server 2016 or later (64-bit)", "Folder": "Folder3"}]

我尝试了所有解决方案，但没有办法，所有结果都不是我想要的。有人可以帮我找到一个解决方案来获得这个出席的结果

Answer 1

下面的任务完成了这项工作

    - set_fact:
        _list: "{{ json.content|json_query(query) }}"
      vars:
        query: "[].{name: name,
                    OsName: resourceData.entries[0].value.value,
                    Folder: resourceData.entries[1].value.value}"

给予

  _list:
  - Folder: Folder1
    OsName: Red Hat Enterprise Linux 7 (64-bit)
    name: machine1
  - Folder: Folder2
    OsName: Red Hat Enterprise Linux 7 (64-bit)
    name: machine2
  - Folder: Folder3
    OsName: Windows Server 2016 or later (64-bit)
    name: machine

---

问："改变了(key, value)的顺序，所以用[0]和[1]引用会不一样。"

A：通过按键选择项目。您必须pipe 结果并选择所选列表的第一项，例如下面的任务给出了相同的结果

    - set_fact:
        _list: "{{ json.content|json_query(query) }}"
      vars:
        query: "[].{name: name,
                    OsName: resourceData.entries[?key==`MachineGuestOperatingSystem`].value.value|[0],
                    Folder: resourceData.entries[?key==`VMware.VirtualCenter.Folder`].value.value|[0]}"

---

问：“过滤 'Red Hat ...' 获取输出”

  - Folder: Folder1
    OsName: Red Hat Enterprise Linux 7 (64-bit)
    name: machine1
  - Folder: Folder2
    OsName: Red Hat Enterprise Linux 7 (64-bit)
    name: machine2

A：使用 selectattr，例如下面的任务完成了这项工作

    - debug:
        msg: "{{ _list|
                 selectattr('OsName', 'eq', 'Red Hat Enterprise Linux 7 (64-bit)')|
                 list }}"

---

问：“我可以在哪里学习这种搜索？”

答：JMESPath Specification 中有例子。作为提示，请参阅下面的代码，了解如何将这些示例转换为 Ansible json_query

Example1

    - name: 'search(foo, {"foo": "value"}) -> "value"'
      debug:
        msg: "{{ _dict|json_query(_query) }}"
      vars:
        _dict: {"foo": "value"}
        _query: "foo"

Example2

    - name: 'search(foo[?bar==`10`], {"foo": [{"bar": 1}, {"bar": 10}]}) -> [{"bar": 10}]'
      debug:
        msg: "{{ _dict|json_query(_query) }}"
      vars:
        _dict: {"foo": [{"bar": 1}, {"bar": 10}]}
        _query: "foo[?bar==`10`]"

Example3

    - name: 'search(foo | bar, {"foo": {"bar": "baz"}}) -> "baz"'
      debug:
        msg: "{{ _dict|json_query(_query) }}"
      vars:
        _dict: {"foo": {"bar": "baz"}}
        _query: "foo | bar"