Amazon Elastic Compute Cloud

2018/03/01 - Amazon Elastic Compute Cloud - 1 updated api methods

Changes  Added support for modifying Placement Group association of instances via ModifyInstancePlacement API.

ModifyInstancePlacement (updated) Link ΒΆ
Changes (request)
{'GroupName': 'string'}

Modifies the placement attributes for a specified instance. You can do the following:

  • Modify the affinity between an instance and a Dedicated Host . When affinity is set to host and the instance is not associated with a specific Dedicated Host, the next time the instance is launched, it is automatically associated with the host on which it lands. If the instance is restarted or rebooted, this relationship persists.

  • Change the Dedicated Host with which an instance is associated.

  • Change the instance tenancy of an instance from host to dedicated , or from dedicated to host .

  • Move an instance to or from a placement group .

At least one attribute for affinity, host ID, tenancy, or placement group name must be specified in the request. Affinity and tenancy can be modified in the same request.

To modify the host ID, tenancy, or placement group for an instance, the instance must be in the stopped state.

See also: AWS API Documentation

Request Syntax

type Affinity


param Affinity

The affinity setting for the instance.

type GroupName


param GroupName

The name of the placement group in which to place the instance. For spread placement groups, the instance must have a tenancy of default . For cluster placement groups, the instance must have a tenancy of default or dedicated .

To remove an instance from a placement group, specify an empty string ("").

type HostId


param HostId

The ID of the Dedicated Host with which to associate the instance.

type InstanceId


param InstanceId


The ID of the instance that you are modifying.

type Tenancy


param Tenancy

The tenancy for the instance.




Response Syntax

    'Return': True|False

Response Structure

  • (dict) --

    Contains the output of ModifyInstancePlacement.

    • Return (boolean) --

      Is true if the request succeeds, and an error otherwise.