• Goal:
  Learn horizontal scaling (more containers running).
• Description:
  To scale the ECS Service by increasing or decreasing the number of running containers. Scaling is performed directly from the ECS Service configuration, where you update the desired task count to control how many instances of your application should run simultaneously. By navigating to your cluster and selecting the service, you click Update and modify the desired count—such as increasing it from 1 to 2—to immediately launch additional tasks. ECS automatically provisions the extra containers using the same task definition, ensuring they run consistently across the cluster. You can observe the new tasks under the Tasks tab, where each represents an additional running copy of your application. If an Application Load Balancer is configured, traffic is distributed evenly across all tasks; otherwise, the tasks run independently. To scale down, you simply update the service again and reduce the desired count, prompting ECS to stop the extra tasks while keeping the target number running. This exercise demonstrates horizontal scaling and how ECS makes it easy to elastically adjust capacity.

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