嵌套字典列表中的ansible访问键

Question

我正在尝试使用循环来检索多个列表嵌套字典中存在的多个值。 不幸的是，除非我明确定义我想要获取哪个列表，否则我似乎无法这样做。 由于我打算定义数百个这样的设备，我希望有一些东西可以更好地扩展。

#playbook.yml
tasks:
   - name: Get volume details using name
      get_storage_volume:
        host: "{{ host }}"
        username: "{{ username }}"
        password: "{{ password }}"
        name: "{{ inventory_hostname }}-{{ item.volsuffix }}"
        state: "present"
      register: volume_results
      loop: "{{ volumes }}"

volumes:
  - volsuffix: data1
    volsize: 100
    mount_path: /data/fs1
    fstype: xfs
    mount_opts: noatime
    storage_protocol: fc

  - volsuffix: data2
    volsize: 100
    mount_path: /data/fs2
    fstype: xfs
    mount_opts: noatime,_netdev
    storage_protocol: iscsi

    - debug:
        msg: "{{ volume_results.results.0.attrs.serial_number }}"
        #msg: "{{ volume_results.results.1.attrs.serial_number }}"

我想避免显式调用列表条目 [0] 和 [1]，如下所示：

TASK [debug] *********************************************************************************************************************************************************************************************************************************************************************************************************************
ok: [node1] => {
    "msg": "abcdef12345"
}
ok: [node2] => {
    "msg": "cvbnm46807"
}

如果我输出所有“{{volume_results.result }}”，数据格式如下：

TASK [debug] *******************************************************************
ok: [node1] => {
    "volume_results.results": [
        {
            "ansible_loop_var": "item",
            "attrs": {
                "agent_type": "none",
                "name": "node1-data1",
                "serial_number": "abcdef12345",
                "warn_level": 0
            },
        },
        {
            "ansible_loop_var": "item",
            "attrs": {
                "agent_type": "none",
                "name": "node1-data2",
                "serial_number": "987654qwert",
                "warn_level": 0
            }
        }
    ]
}

ok: [node2] => {
    "volume_results.results": [
        {
            "ansible_loop_var": "item",
            "attrs": {
                "agent_type": "none",
                "name": "node2-data1",
                "serial_number": "cvbnm46807",
                "warn_level": 0
            },
        },
        {
            "ansible_loop_var": "item",
            "attrs": {
                "agent_type": "none",
                "name": "node2-data2",
                "serial_number": "asdfg56789",
                "warn_level": 0
            }
        }
    ]
}

想法？

Answer 1

要么使用地图，例如，

- debug:
    msg: "{{ volume_results.results|
             map(attribute='attrs.serial_number') }}"

，或json_query

- debug:
    msg: "{{ volume_results.results|
             json_query('[].attrs.serial_number') }}"

两个选项给出相同的结果

  msg:
  - abcdef12345
  - 987654qwert

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