AWS Tools for PowerShell - Amazon EC2 Container Service
From DevOps Notebook
Update ECS number of tasks
Update-ECSService -Cluster <cluster name> -DesiredCount <number of wanted tasks> -TaskDefinition <task definition> -Service <name of service>
Update-ECSService -Cluster <cluster name> -DesiredCount <number of wanted tasks> -TaskDefinition <task definition> -Service <name of service>