Cluster, task, service

What this card says

Why do we need it?

Wrong words in an interview sound like you never ran containers on AWS.

What is it?

Cluster = home for services. Task definition = recipe. Task = one running copy. Service = keep N tasks healthy.

How to do it

Create cluster → register task definition → create service with desired count and launch type Fargate.

desiredCount

Example

Kill one task; the service starts a replacement so count stays at N.