====== ECS (Elastic Container Service) ======

**What it is:** AWS-managed service to run and scale containers.

**What it’s for:**
  * Deploy containerized applications without running Kubernetes.
  * Manage services, scaling, and rolling updates.

**Key ideas:**
  * Runs on:
    * EC2 launch type (you manage instances)
    * [[aws:containers:fargate|Fargate]] launch type (serverless containers)
  * Core units:
    * [[aws:containers:ecs:cluster|Cluster]]
    * [[aws:containers:ecs:task-definition|Task Definition]]
    * [[aws:containers:ecs:service|Service]]

**Exam cues:**
  * “run containers with AWS-managed orchestration” → ECS.
  * “don’t want to manage servers” → ECS on Fargate.

**Hard words:**
  * *orchestration* /ˌɔːrkəˈstreɪʃn/: điều phối
  * *rolling update* /ˈroʊlɪŋ ˈʌpdeɪt/: cập nhật cuốn chiếu