Viewing Parameter Change History of an Instance

Function

This API is used to view change history of parameters of an instance.

URI

GET https://{Endpoint}/v3/{project_id}/instances/{instance_id}/configuration-histories

**Table 1** Path parameters
Name	Mandatory	Type	Description
project_id	Yes	String	Definition Project ID of a tenant in a region. Constraints N/A Range N/A Default Value N/A
instance_id	Yes	String	Definition DB instance ID. Constraints N/A Range N/A Default Value N/A

**Table 2** Query parameters
Name	Mandatory	Type	Description
entity_id	No	String	Definition Instance ID, group ID, or node ID. To obtain the value, call the API for Querying Instances and Details. If you do not have an instance, call the API described in Creating a DB Instance to create one. Constraints If the DB instance type is cluster and the shard or config parameter template is obtained, the value is the group ID. If the parameter template of the mongos node is obtained, the value is the node ID. If the DB instance type is replica set or single node, the value is the instance ID. If the DB instance type is read replica, the value is the node ID. Range N/A Default Value N/A
offset	No	Integer	Definition Index offset. If offset is set to N, the query starts from the N+1 piece of data. The default value is 0, which indicates that the query starts from the first piece of data. Constraints The value cannot be a negative number. Range N/A Default Value 0
limit	No	Integer	Definition Maximum records to be queried. If this parameter is not transferred, the first 100 records are queried by default. Constraints N/A Range 1–100 Default Value 100

Request Parameters

**Table 3** Request header parameters
Name	Mandatory	Type	Description
X-Auth-Token	Yes	String	Definition User token obtained from IAM. For details, see Authentication. Constraints N/A Range N/A Default Value N/A

Response Parameters

Status code: 200

**Table 4** Response body parameters
Name	Type	Description
histories	Array of objects	Definition Change history of parameters of an instance. For details, see Table 5. Range N/A

**Table 5** ConfigurationModifyHistoryInfo
Name	Type	Description
parameter_name	String	Definition The parameter name. Range N/A
old_value	String	Definition Value before modification. Range N/A
new_value	String	Definition New value. Range N/A
update_result	String	Definition Update result. Range N/A
applied	Boolean	Definition Whether the new value has been applied to the instance. Range true: indicates that the new value has been applied. false: indicates that the new value has not been applied.
updated_at	String	Definition Modification time. The format is "yyyy-MM-ddTHH:mm:ssZ". T is the separator between the calendar and the hourly notation of time. Z indicates the time zone offset. For example, in the Beijing time zone, the time zone offset is shown as +0800. Range N/A
applied_at	String	Definition Application time. The format is "yyyy-MM-ddTHH:mm:ssZ". T is the separator between the calendar and the hourly notation of time. Z indicates the time zone offset. For example, in the Beijing time zone, the time zone offset is shown as +0800. Range N/A

Example Request

https://{Endpoint}/v3/0549b4a43100d4f32f51c01c2fe4acdb/instances/c4e095105bc64797bc3be633ae7201eein02/configuration-histories?entity_id=c4e095105bc64797bc3be633ae7201eein02&offset=0&limit=10

Example Response

{ 
  "histories" : [ { 
    "parameter_name" : "rateLimit.mbps", 
    "old_value" : "500", 
    "new_value" : "350", 
    "update_result" : "SUCCESS", 
    "applied" : true, 
    "updated_at" : "2022-06-07T09:25:45+0000", 
    "applied_at" : "2022-06-07T09:25:45+0000" 
  } ] 
}

SDK

Click Document Database Service DDS SDK to download the SDK or view the SDK document. To learn how to install and authenticate an SDK, read the Usage section.