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


An object representing a constraint on task placement. 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. You cannot specify an expression if the constraint type is distinctInstance. For more information, see Cluster Query Language in the Amazon Elastic Container Service Developer Guide.

Type: String

Required: No


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. The value distinctInstance is not supported in task definitions.

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:

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