PlacementConstraint - EventBridge Scheduler
This documentation is a draft for private preview for regions in the AWS European Sovereign Cloud. Documentation content will continue to evolve. Published: December 31, 2025.

PlacementConstraint

An object representing a constraint on task placement.

Contents

expression

A cluster query language expression to apply to the constraint. You cannot specify an expression if the constraint type is distinctInstance. For more information, see Cluster query language in the Amazon ECS Developer Guide.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 2000.

Required: No

type

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.

Type: String

Valid Values: distinctInstance | memberOf

Required: No

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: