Deployment configuration for ECS Fargate Service

Question

We have build a tier-1 service and we want to ensure 100% availability during the deployment. Our Service needs 15 tasks to serve 850 tps traffic. We are looking for deployment configuration

(1) Desired count is 15 as of now

To ensure the service is always available I had set minimumHealthyPercent to 100%, but during deployment I had seen there is spike in the unhealthy hosts.

(2) what should be the minimumHealthyPercent ?

(3) what should be maximumPercent ?

(4) Should we modify the health check associated with target group ?

Answer

Set minimum to 100% and maximum at 200%, then ECS will scale up 15 new task, once they are ready they will replace the 15 old. No need to modify any health checks

Deployment configuration for ECS Fargate Service

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