Querying a Stack Element

Function

This API is used to query a stack element.

URI

GET /v2/stacks/{stack_id}/elements/{node_id}

**Table 1** Parameter description
Parameter	Mandatory	Description
stack_id	Yes	Stack ID, which supports a maximum of 64 characters
node_id	Yes	Stack element ID, which supports a maximum of 64 characters

Request

N/A

Response message.

Response Parameters

A response parameter is a stack element structure or response structure.

The stack element structure is returned when the query is successful.
The response structure is returned when the query fails.

The stack element structure is shown in Table 2 Response parameters, and the returned response structure is shown in Table 5.

**Table 2** Response Parameters
Parameter	Type	Description
instances	Array of objects	Structure of instances. For details, see Table 3. Only application instances are returned in this structure. This field is empty for cloud services.
id	String	Element name.
description	String	Element description.
properties	Object	Element attribute, which corresponds to the template content.
runtime_properties	Object	Element runtime attribute.
relationships	Array of objects	Relationships between elements. For details, see Table 4.
stack_id	String	Stack guid to which the element belongs.
type	String	Element type.
create_at	String	Element creation time.
update_at	String	Element update time.
type_hierarchy	String	Stack element type.
charge_mode	String	Element billing mode
min_duration	Integer	Minimum lifecycle duration
max_duration	Integer	Maximum lifecycle duration
deletion_policy	String	Element deletion policy
action_status	Object	Status of a stack element. For details, see Table 5.

**Table 3** Data structure of the instances field
Parameter	Type	Description
items	Array<Map<String,Map<String,String>>>	Information about all instances of an element

Example Response

{
    "create_at": "2016-12-21T05:45:19Z",
    "description": "",
    "id": "redis-app",
    "properties": {},
    "relationships": [],
    "runtime_properties": {},
    "stack_id": "0404c915-4a0c-260f-e146-eea4b95ee578",
    "type": "HuaweiCloud.AOS.StatelessApplication",
    "update_at": "2016-12-21T05:45:19Z",
    "instances": {
        "items": []
    }
}