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This article will explain in detail how to query the custom data of an ECS instance by Base64 coding. The editor thinks it is very practical, so I share it with you for reference. I hope you can get something after reading this article.

DescribeUserdata

Query the custom data of an ECS instance.

Description

The instance customization data returned will be displayed in Base64-encoded format.

If custom data does not exist in the instance, a null value is returned.

Request parameter

Return parameters

Example

Request example

Https://ecs.aliyuncs.com/?Action= DescribeUserdata&RegionId=cn-shenzhen&InstanceId=i-instance1& https://ecs.example.com/?Action= DescribeUserdata&RegionId=cn-shenzhen&InstanceId=i-instance1&

Return the example

XML format

473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E userdata1 i-instance1 cn-shenzhen

JSON format

{"RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3C83E"UserData": "userdata1"InstanceId": "i-instance1"RegionId": "cn-shenzhen"}

Error code

The following are the error codes specific to this API. For more error codes, please visit the API error Center.

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