Querying Resources by Tag¶
Function¶
This API is used to query the specified DB instances by tag.
Constraints¶
A maximum of 20 tags can be added to a DB instance. The tag key must be unique.
URI¶
Requests¶
Parameter description
¶ Name
Mandatory
Type
Description
offset
No
String
Specifies the index position. The query starts from the next piece of data indexed by this parameter.
If action is set to count, this parameter is not transferred.
If action is set to filter, this parameter must be a positive integer. The default value is 0, indicating that the query starts from the first piece of data.
limit
No
String
Specifies the number of resources to be queried.
If action is set to count, this parameter is not transferred.
If action is set to filter, the value range is from 1 to 100. If this parameter is not transferred, the first 100 DB instances are queried by default.
action
Yes
String
Specifies the operation identifier.
If action is set to filter, instances are queried by tag filtering criteria.
If action is set to count, only the total number of records is returned.
matches
No
Array of objects
Specifies the search field.
If the value is left blank, the query is not based on the instance name or instance ID.
If the value is not empty, see Table 4.
tags
No
Array of objects
Specifies the included tags. Each tag contains a maximum of 20 keys. For more information, see Table 3.
¶ Name
Mandatory
Type
Description
key
Yes
String
Specifies the tag key. It contains a maximum of 36 Unicode characters. key cannot be empty, an empty string, or spaces. Before using key, delete spaces before and after the value.
Note
The character set of this parameter is not verified in the search process.
values
Yes
Array of strings
Lists the tag values. Each value contains a maximum of 43 Unicode characters and cannot contain spaces. Before using values, delete spaces before and after the value.
If the values are null, it indicates querying any value. The values are in OR relationship.
¶ Name
Mandatory
Type
Description
key
Yes
String
Specifies the query criteria. The value can be instance_name or instance_id, indicating that the query is based on the instance name or instance ID.
value
Yes
String
Specifies the name or ID of the DB instance to be matched. You can call the API for querying DB instances to obtain the DB instance name or ID. If you do not have an instance, you can call the API used for creating an instance.
Example request
POST https://dds.eu-de.otc.t-systems.com/v3/0549b4a43100d4f32f51c01c2fe4acdb/instances/action
Query specified DB instances by tag.
{ "offset": "100", "limit": "100", "action": "filter", "matches": [ { "key": "instance_name", "value": "test-single" } ], "tags": [ { "key": "key1", "values": [ "value1", "value2" ] } ] }
Query the total number of resources.
{ "action": "count", "tags": [ { "key": "key1", "values": [ "value1", "value2" ] }, { "key": "key2", "values": [ "value1", "value2" ] } ], "matches": [ { "key": "instance_name", "value": "test-single" }, { "key": "instance_id", "value": "958693039f284d6ebfb177375711072ein02" } ] }
Responses¶
Parameter description
¶ Name
Type
Description
instances
Array of objects
Indicates the instance list. For details, see Table 6.
total_count
Integer
Indicates the total number of queried records.
¶ Name
Type
Description
instance_id
String
Indicates the instance ID, which can be obtained by calling the API for querying instances. If you do not have an instance, you can call the API used for creating an instance.
instance_name
String
Indicates the DB instance name.
tags
Array of objects
Indicates the tag list. If there is no tag in the list, tags is taken as an empty array. For more information, see Table 7.
¶ Name
Type
Description
key
String
Indicates the tag key. The value contains 36 Unicode characters and cannot be blank.
Character set: 0-9, A-Z, a-z, "_", "-", and "@".
value
String
Indicates the tag value. The value contains a maximum of 43 Unicode characters and can also be an empty string.
Character set: 0-9, A-Z, a-z, "_", "-", and "@".
Response example
Return specified DB instances by tag.
{ "instances": [ { "instance_id": "2acbf2223caf3bac3c33c6153423c3ccin02", "instance_name": "test-single", "tags": [ { "key": "key1", "value": "value1" }, { "key": "key2", "value": "value1" } ] } ] }
Number of returned records.
{ "total_count": 4 }
Status Code¶
Status Code:200.
For more information, see Status Code.
Error Code¶
For more information, see Error Code.