AWS::ECS::TaskDefinition TaskDefinitionPlacementConstraint - Amazon CloudFormation
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China (PDF).

AWS::ECS::TaskDefinition TaskDefinitionPlacementConstraint

An object representing a constraint on task placement in the task definition. For more information, see Task placement constraints in the Amazon Elastic Container Service Developer Guide.


Task placement constraints aren't supported for tasks run on Amazon Fargate.


To declare this entity in your Amazon CloudFormation template, use the following syntax:


{ "Expression" : String, "Type" : String }


Expression: String Type: String



A cluster query language expression to apply to the constraint. For more information, see Cluster query language in the Amazon Elastic Container Service Developer Guide.

Required: No

Type: String

Update requires: Replacement


The type of constraint. The MemberOf constraint restricts selection to be from a group of valid candidates.

Required: Yes

Type: String

Allowed values: memberOf

Update requires: Replacement