ECS

 https://medium.com/boltops/gentle-introduction-to-how-aws-ecs-works-with-example-tutorial-cea3d27ce63d


Cluster creation :
Template type - Networking only (Fargate), EC2 type

Roles

Task execution IAM role, this role helps to pull images from your docker registery
Task Role - for accessing AWS services 


Service creation
Type - Fargate/EC2
Type - Replica
No of task instances 
Min, Max num of healthy instances 

Service Auto Scaling is made possible by a combination of the Amazon ECS, CloudWatch, and Application Auto Scaling APIs. Services are created and updated with Amazon ECS, alarms are created with CloudWatch, and scaling policies are created with Application Auto Scaling.

Application Auto Scaling turns off scale-in processes while Amazon ECS deployments are in progress. However, scale-out processes continue to occur, unless suspended, during a deployment.

Target tracking, step, schedule scaling supported



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