在 Ansible 中正确指定嵌套变量

问：

我需要从 ansible 中的嵌套字典中提取一些值，但我似乎做不到。 要么我定义得不好，要么指定得不好。ansible 错误消息当然无济于事。

我加载了一个 vars 文件，其数据结构如下： 对于每个站点，我指定了 vCenter 和域控制器

datacenters:
  - datacenter: Site1
    vars:
      vcenter_instance: vcenter1
      ADC: DC1
  - datacenter: Site2
    vars:
      vcenter_instance: vcenter2
      ADC: DC2
  - datacenter: Site3
    vars:
      vcenter_instance: vcenter1
      ADC: DC3
  - datacenter: TEST
    vars:
      vcenter_instance: vcentertest
      ADC: DC1

我添加了一个调试任务来查看数据在 Ansible 中的样子。我给我这个：

        
        {
            "datacenter": "TEST",
            "vars": {
                "ADC": "DC1",
                "vcenter_instance": "vcentertest"
            }
        }

我在其他位置设置了数据中心值，然后尝试从数组中提取所需的数据

    - name: auto populate some variables based on which datacenter is selected
      set_fact:
        vcenter_hostname: "{{ datacenters[datacenter].vcenter_instance }}"
        ADController: "{{ datacenters[datacenter].ADC }}"
        Library: "'{{ datacenter  + '-' + 'Repository' }}"

我收到错误"The task includes an option with an undefined variable. The error was: 'list object' has no attribute 'TEST'. 'list object' has no attribute 'TEST'\n\nThe error appears to be in '/runner/project/create_vm.yml': line 32, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n - name: auto populate some variables based on which datacenter is selected\