Querying the Operations Performed on a Component Instance

This API is used to query the operations performed on a component instance.

POST /v2/{project_id}/cas/applications/{application_id}/components/{component_id}/instances/{instance_id}/action

**Table 1** Path parameters
Parameter	Type	Mandatory	Description
project_id	String	Yes	Tenant's project ID.
application_id	String	Yes	Application ID.
component_id	String	Yes	Component ID.
instance_id	String	Yes	Component instance ID.

**Table 2** Request parameters
Parameter	Type	Mandatory	Description
action	String	Yes	Operation. Value: start, stop, restart, scale, or rollback.
parameters	Object	No	Operation parameter, which is mandatory when action is set to scale or rollback. See Table 3.

**Table 3** parameters description
Parameter	Type	Mandatory	Description
replica	Integer	No	Number of instances, which is mandatory when action is set to scale.
hosts	Array	No	ECS ID list. This parameter specifies the ECS deployed during VM scaling, and is mandatory for scaling.
version	String	No	Version number, which is mandatory when action is set to rollback. You can obtain the version number by using the API in Obtaining Component Instance Snapshots.

**Table 4** Response parameters
Parameter	Type	Description
job_id	String	Job ID.

Example request

{
  "action": "scale",
  "parameters": {
    "replica": 4
  }
}

Example response

{
    "job_id": "JOB66761060-f209-407c-a093-4df6f531b9dc"
}

Error code must be in the format of SVCSTG.00100.[Error_ID]. Example: SVCSTG.00100400. See Error Codes of Application Management APIs.

Parent topic: Instance

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