interface PlacementConstraintProperty
| Language | Type name |
|---|---|
 .NET | Amazon.CDK.AWS.ECS.CfnService.PlacementConstraintProperty |
 Go | github.com/aws/aws-cdk-go/awscdk/v2/awsecs#CfnService_PlacementConstraintProperty |
 Java | software.amazon.awscdk.services.ecs.CfnService.PlacementConstraintProperty |
 Python | aws_cdk.aws_ecs.CfnService.PlacementConstraintProperty |
 TypeScript | aws-cdk-lib » aws_ecs » CfnService » PlacementConstraintProperty |
An object representing a constraint on task placement.
For more information, see Task placement constraints in the Amazon Elastic Container Service Developer Guide .
If you're using the Fargate launch type, task placement constraints aren't supported.
Example
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import { aws_ecs as ecs } from 'aws-cdk-lib';
const placementConstraintProperty: ecs.CfnService.PlacementConstraintProperty = {
type: 'type',
// the properties below are optional
expression: 'expression',
};
Properties
| Name | Type | Description |
|---|---|---|
| type | string | The type of constraint. |
| expression? | string | A cluster query language expression to apply to the constraint. |
type
Type:
string
The type of constraint.
Use distinctInstance to ensure that each task in a particular group is running on a different container instance. Use memberOf to restrict the selection to a group of valid candidates.
expression?
Type:
string
(optional)
A cluster query language expression to apply to the constraint.
The expression can have a maximum length of 2000 characters. You can't specify an expression if the constraint type is distinctInstance . For more information, see Cluster query language in the Amazon Elastic Container Service Developer Guide .