Amazon Elastic Container Service
API Reference (API Version 2014-11-13)


An object representing a constraint on task placement in the task definition.

If you are using the Fargate launch type, task placement constraints are not supported.

For more information, see Task Placement Constraints in the Amazon Elastic Container Service Developer Guide.



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.

Type: String

Required: No


The type of constraint. The DistinctInstance constraint ensures that each task in a particular group is running on a different container instance. The MemberOf constraint restricts selection to be from a group of valid candidates.

Type: String

Valid Values: memberOf

Required: No

See Also

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

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