无法解析 Ansible Jinja2 中的 JSON 列表

Question

我正在尝试解析以下 JSON 输出并提取 volume_id_attributes.name 和 volume_space_attributes.size_total 但它一直在说：

fatal: [localhost]: FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: 'str object' has no attribute 'volume_id_attributes'"}

这是我要解析的 JSON 输出的片段：

ok: [localhost] => {
    "msg": {
        "results": [
            {       
                "item": "Application_Backups",
                "ontap_info": {
                    "volume_info": {
                        "alfred_backup:Application_Backups": {
                            "volume_id_attributes": {                
                                "name": "alfred_backup"
                             },
                            "volume_space_attributes": {
                                "size_total": "357019156480",
                            }
                        },
                        "alfred_prod:Application_Backups": {
                            "volume_id_attributes": {                
                                "name": "alfred_prod"
                             },
                            "volume_space_attributes": {
                                "size_total": "397512166710",
                            }
                        }, 
 "item": "Database_backups",
                "ontap_info": {
                    "volume_info": {
                        "backup:Database_backups": {
                            "volume_id_attributes": {                
                                "name": "backup"
                             },
                            "volume_space_attributes": {
                                "size_total": "754219156480",
                            }
                        },
                        "prod:Database_backups": {
                            "volume_id_attributes": {                
                                "name": "prod"
                             },
                            "volume_space_attributes": {
                                "size_total": "398952211210",
                            }
                        }
]

这是 jinja2 脚本：

 {% for svm in volumes.results %}
    {% set svm_name = svm.item %}
    <td style="text-align: center;" rowspan={{ volumes|length }} class="confluenceTd">{{ svm_name }}</td>
    {% for volume in svm.ontap_info.volume_info %}
        {% set volume_name = volume.volume_id_attributes.name %}
        {% set volume_size_total = volume.volume_space_attributes.size_total %}

当我只打印 {{ volume }} 时，它会打印 alfred_backup:Application_Backups 和 alfred_prod:Application_Backups 但它不想进入他们的列表。

你能指出我做错了什么吗？

Answer 1

在 Jinja 中对列表执行 for 循环时，您确实得到了预期结果，这就是您的循环 {% for svm in volumes.results %} 有效的原因。

当你在字典上循环时，你只会得到字典的键，如果你像你这样循环：{% for volume in svm.ontap_info.volume_info %}，所以，volume 将是你的字典键.

您想要实现的仍然是可能的，形式为

{% for key, value in dict.items() %}

^{如 Jinja 的文档所示：https://jinja.palletsprojects.com/en/2.11.x/templates/#for}

所以完整的工作手册应该是

- hosts: all
  gather_facts: no
      
  tasks:
    - debug:
        msg: |
          {% for svm in volumes.results %}
            {% set svm_name = svm.item %}
            <td style="text-align: center;" rowspan={{ volumes|length }} class="confluenceTd">{{ svm_name }}</td>
            {% for key, volume in svm.ontap_info.volume_info.items() %}
              {% set volume_name = volume.volume_id_attributes.name %}
              {% set volume_size_total = volume.volume_space_attributes.size_total %}
              <td>{{ volume_name }}</td>
              <td>{{ volume_size_total }}</td>
            {% endfor %}
          {% endfor %}
      vars:
        {
          "volumes": {
            "results": [{
                "item": "Application_Backups",
                "ontap_info": {
                  "volume_info": {
                    "alfred_backup:Application_Backups": {
                      "volume_id_attributes": {
                        "name": "alfred_backup"
                      },
                      "volume_space_attributes": {
                        "size_total": "357019156480"
                      }
                    },
                    "alfred_prod:Application_Backups": {
                      "volume_id_attributes": {
                        "name": "alfred_prod"
                      },
                      "volume_space_attributes": {
                        "size_total": "397512166710"
                      }
                    }
                  }
                }
              },
              {
                "item": "Database_backups",
                "ontap_info": {
                  "volume_info": {
                    "backup:Database_backups": {
                      "volume_id_attributes": {
                        "name": "backup"
                      },
                      "volume_space_attributes": {
                        "size_total": "754219156480"
                      }
                    },
                    "prod:Database_backups": {
                      "volume_id_attributes": {
                        "name": "prod"
                      },
                      "volume_space_attributes": {
                        "size_total": "398952211210"
                      }
                    }
                  }
                }
              }
            ]
          }
        }

结果是 HTML 片段：

<td style="text-align: center;" rowspan=1 class="confluenceTd">Application_Backups</td>
<td>alfred_backup</td>
<td>357019156480</td>
<td>alfred_prod</td>
<td>397512166710</td>

<td style="text-align: center;" rowspan=1 class="confluenceTd">Database_backups</td>
<td>backup</td>
<td>754219156480</td>
<td>prod</td>
<td>398952211210</td>

无法解析 Ansible Jinja2 中的 JSON 列表

Can't parse JSON list in Ansible Jinja2

json

jinja2

ansible