# 示例2：根据主机集群id查询主机集群详情
#### 场景描述
本章以CodeArts用户为例，指导您通过API查询指定主机集群详情。
API的调用方法请参见[如何调用API](https://support.huaweicloud.com/api-deployman/CloudDeploy_api_1001.html)。
#### 前提
用户已经创建CodeArts项目，并且项目下有主机集群。
#### 总体思路
先通过api查看所有的主机集群列表，并获得想要查看的主机集群group_id，使用该group_id在本api中查询该主机集群的详细信息，步骤如下：
1. [查询用户的所有主机集群](https://support.huaweicloud.com/api-deployman/ListHostGroups.html)。
2. [查询某个主机集群的详细信息](https://support.huaweicloud.com/api-deployman/ShowDeploymentGroupDetail.html)。
 
#### 步骤1：查询用户所有主机集群
- 接口信息：
  ```
  URI：GET /v2/host-groups
  ```
  API Explorer在线调试请参见：[查询主机集群列表](https://apiexplorer.developer.huaweicloud.com/apiexplorer/doc?product=CodeArtsDeploy&api=ListHostGroups) 。
  

- 请求示例：
  ```
  GET  https://{endpoint}/v2/host-groups?region_name=cn-north-7&project_id=6039d4480efc4dddb178abff98719913&offset=1&limit=10&sort_key=create_time&sort_dir=DESC
  ```
  

- 响应示例：
  ```
  { 
    "total" : 1, 
    "host_groups" : [ { 
      "name" : "testwyk", 
      "description" : "11122211", 
      "os" : "linux", 
      "nick_name" : "AB边账号", 
      "id" : 200001291, 
      "group_id" : "ab7647b0863c4e969c8949d38d591339", 
      "region_name" : "cn-north-7", 
      "project_id" : "6039d4480efc4dddb178abff98719913", 
      "permission" : { 
        "can_view" : true, 
        "can_edit" : true, 
        "can_delete" : true, 
        "can_add_host" : true, 
        "can_manage" : true 
      }, 
      "created_by" : { 
        "user_id" : "6baa7454109d47c192f22078fe6cda20", 
        "user_name" : "devcloud_devcloud_l00490255_01" 
      }, 
      "updated_by" : { 
        "user_id" : "6baa7454109d47c192f22078fe6cda20", 
        "user_name" : "devcloud_devcloud_l00490255_01" 
      }, 
      "auto_connection_test_switch" : 0, 
      "slave_cluster_id" : "", 
      "created_time" : "2021-04-01 17:05:53", 
      "updated_time" : "2021-04-21 14:29:14", 
      "host_count" : 1, 
      "project_name" : null 
    } ] 
  }
  ```
  
 
#### 步骤2：查询主机集群详情
- 接口信息：
  ```
  URI：GET /v2/host-groups/{group_id}
  ```
  API Explorer在线调试请参见： [查询主机集群详情](https://apiexplorer.developer.huaweicloud.com/apiexplorer/doc?product=CodeArtsDeploy&api=ShowDeploymentGroupDetail)。
  

- 请求示例：
  ```
  GET  https://{endpoint}/v2/host-groups/ab7647b0863c4e969c8949d38d591339
  ```
  
- 响应示例：
  ```
  { 
    "name" : "test", 
    "description" : "11122211", 
    "os" : "linux", 
    "region_name" : "cn-north-7", 
    "project_id" : "6039d4480efc4dddb178abff98719913", 
    "created_by" : { 
      "user_id" : "6baa7454109d47c192f22078fe6cda20", 
      "user_name" : "devcloud_devcloud_l00490255_01" 
    }, 
    "updated_by" : { 
      "user_id" : "6baa7454109d47c192f22078fe6cda20", 
      "user_name" : "devcloud_devcloud_l00490255_01" 
    }, 
    "permission" : { 
      "can_view" : true, 
      "can_edit" : true, 
      "can_delete" : true, 
      "can_add_host" : true, 
      "can_manage" : true 
    }, 
    "auto_connection_test_switch" : 0, 
    "slave_cluster_id" : "", 
    "nick_name" : "AB边账号", 
    "group_id" : "ab7647b0863c4e969c8949d38d591339", 
    "created_time" : "2021-04-01 17:05:53", 
    "updated_time" : "2021-04-21 14:29:14", 
    "host_count" : 1 
  }
  ```