Best Practices, Troubleshooting, and Next Steps in AWS ECS

Use Fargate for simplicity.

Implement least privilege IAM.

Enable logging/monitoring.

Use blue/green deployments (new in 2025 for safer releases).

Cost: Monitor with Cost Explorer; use Spot for non-prod.

Security:

• Scan images
• Use private ECR

Performance:

• Right-size CPU and memory

Cost:

• Enable auto-scaling
• Delete unused resources

• Permissions: Check IAM errors.
• Networking: Verify SGs, subnets.
• Logs: Use CloudWatch for container crashes.
• Common: "No Container Instances" – add capacity.

• Explore ECS Anywhere for on-prem.
• Try Kubernetes with EKS.
• Build a full app: Add DB with RDS.

Cheat Sheet:

• Cluster: aws ecs create-cluster
• Task: aws ecs register-task-definition
• Service: aws ecs create-service

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