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Elastic Compute Service:DescribeUserData

更新時間:Nov 05, 2024

Queries the user data of an Elastic Compute Service (ECS) instance.

Operation description

  • If no user data is configured for the ECS instance, an empty string is returned.

Debugging

You can run this interface directly in OpenAPI Explorer, saving you the trouble of calculating signatures. After running successfully, OpenAPI Explorer can automatically generate SDK code samples.

Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

  • Operation: the value that you can use in the Action element to specify the operation on a resource.
  • Access level: the access level of each operation. The levels are read, write, and list.
  • Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
    • The required resource types are displayed in bold characters.
    • If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
  • Condition Key: the condition key that is defined by the cloud service.
  • Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.
OperationAccess levelResource typeCondition keyAssociated operation
ecs:DescribeUserDataget
  • Instance
    acs:ecs:{#regionId}:{#accountId}:instance/{#instanceId}
    none
none

Request parameters

ParameterTypeRequiredDescriptionExample
RegionIdstringYes

The region ID of the instance. You can call the DescribeRegions operation to query the most recent region list.

cn-hangzhou
InstanceIdstringYes

The ID of the instance.

i-bp14bnftyqhxg9ij****

Response parameters

ParameterTypeDescriptionExample
object
RequestIdstring

The request ID.

473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E
InstanceIdstring

The instance ID.

i-bp14bnftyqhxg9ij****
UserDatastring

The user data of the instance.

ZWNobyBoZWxsbyBlY321ABC
RegionIdstring

The region ID of the instance.

cn-hangzhou

Examples

Sample success responses

JSONformat

{
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E",
  "InstanceId": "i-bp14bnftyqhxg9ij****",
  "UserData": "ZWNobyBoZWxsbyBlY321ABC",
  "RegionId": "cn-hangzhou"
}

Error codes

HTTP status codeError codeError messageDescription
404InvalidInstanceId.NotFoundThe specified InstanceId does not exist.The specified instance does not exist.

For a list of error codes, visit the Service error codes.

Change history

Change timeSummary of changesOperation
No change history