Add support for ephemeral storage configuration for Fargate tasks

ecs-cli/modules/cli/compose/entity/entity_helper.go

@@ -132,6 +132,7 @@ func createRegisterTaskDefinitionRequest(taskDefinition *ecs.TaskDefinition, tag
 		PidMode:                 taskDefinition.PidMode,
 		IpcMode:                 taskDefinition.IpcMode,
 		PlacementConstraints:    taskDefinition.PlacementConstraints,
+		EphemeralStorage:        taskDefinition.EphemeralStorage,
 	}
 
 	if networkMode := taskDefinition.NetworkMode; aws.StringValue(networkMode) != "" {

ecs-cli/modules/cli/compose/entity/task/task.go

@@ -327,6 +327,11 @@ func (t *Task) buildRunTaskInput(taskDefinition string, count int, overrides map
 		return nil, err
 	}
 
+	ephemeralStorage, err := composeutils.ConvertToECSEphemeralStorage(ecsParams)
+	if err != nil {
+		return nil, err
+	}
+
 	// NOTE: this validation is not useful if called after RegisterTaskDefinition
 	if err := entity.ValidateFargateParams(ecsParams, launchType); err != nil {
 		return nil, err
@@ -364,6 +369,14 @@ func (t *Task) buildRunTaskInput(taskDefinition string, count int, overrides map
 		runTaskInput.LaunchType = aws.String(launchType)
 	}
 
+	if ephemeralStorage != nil {
+		if runTaskInput.Overrides == nil {
+			runTaskInput.Overrides = &ecs.TaskOverride{}
+		}
+
+		runTaskInput.Overrides.SetEphemeralStorage(ephemeralStorage)
+	}
+
 	tags, err := t.GetTags()
 	if err != nil {
 		return nil, err