ECS - Elastic Container Service¶

• ECS is a container orchestration service
• ECS helps you run Docker containers on AWS EC2 machines
• ECS is complicated and made of:
  • "[[ECS Core]]" : Running ECS on user-provisioned AWS EC2 instances
  • [[Fargate]]: Running ECS tasks on AWS-provisioned compute (serverless)
  • AWS EKS: Running ECS on AWS-powered Kubernetes (running on AWS EC2)
  • AWS ECR (Elastic Container Registry): Docker [[Container Registry]] hosted by AWS
• ECS - Elastic Container Service & Docker are very popular for [[micro-service]]s
• IAM security and [[IAM Role]]s at the ECS task level

ECS - Use cases¶

• Run [[micro-service]]s
  • Ability to run multiple docker containers on the same machine
  • Ease Service Discovery features to enhance communication
  • Direct integration with Application Load Balancer (v2)
  • [[Auto scaling]] capability
• Run [[batch processing]] / [[scheduled task]]s
  • Schedule AWS EC2 containers to run EC2 On Demand Instances / EC2 Reserved Instances / EC2 Spot Instances
• [[Migrate]] applications to the [[cloud]]
  • Dockerize [[legacy application]]s running on premise
  • Move docker containers to run on ECS - Elastic Container Service

AWS ECS - Concepts¶

• ECS cluster: set of EC2 instances
• ECS service: applications definitions running on ECS cluster
• ECS tasks + definition: containers running to create the application
• ECS IAM roles: roles assigned to tasks to interact with AWS

AWS ECS - ALB Integration AWS ECS Setup and Config File AWS ECS - ECR Integration