--- title: Which AWS Container Orchestration Should I Use? description: ECS on Fargate, ECS on EC2, EKS, EKS Auto Mode, or App Runner? Answer 4 questions and get an opinionated container path with the comparison guide that goes deeper. url: https://www.factualminds.com/decide/which-aws-container-orchestration/ category: compute publishDate: 2026-08-05 updateDate: 2026-08-05 --- # Which AWS Container Orchestration Should I Use? > Pick ECS Fargate, ECS on EC2, EKS, EKS Auto Mode, or App Runner by ops appetite, Kubernetes needs, and instance control — in 4 questions. ## How to use this tree Ask the Kubernetes question first. Most teams that “default to EKS” do not need Kubernetes APIs — they need containers. If you already chose EKS, prefer Auto Mode unless you have a concrete packing or operator reason to self-manage nodes. For the broader compute catalog (Lambda, Batch, Lightsail), use the [Which AWS Compute Service](/decide/which-aws-compute/) tree. This tree goes deeper on container orchestration only. ## Start Here k8s-need ## Decision Questions ### k8s-need: Do you need the Kubernetes ecosystem (Helm, operators, CRDs, multi-tenancy patterns)? _If you do not need Kubernetes APIs, ECS is almost always the lower-ops path on AWS._ - "No — just run containers on AWS" → ecs-ops - "Yes — we need Kubernetes APIs / ecosystem" → eks-ops - "Not sure — we just want to push a container and forget orchestration" → rec-app-runner ### ecs-ops: Do you need EC2-level instance control (GPUs, custom AMIs, reserved capacity)? _Fargate removes node management. ECS on EC2 buys control at the cost of capacity management._ - "No — prefer zero node management" → rec-ecs-fargate - "Yes — GPUs, custom AMIs, or RI/SP packing across services" → rec-ecs-ec2 - "Mix — most services on Fargate, a few on EC2 capacity providers" → rec-ecs-hybrid ### eks-ops: How much cluster operations does your platform team want to own? _EKS Auto Mode (GA Dec 2024) removes most node ops. Self-managed nodes or Karpenter DIY is for teams that need that control._ - "As little as possible — prefer EKS Auto Mode" → rec-eks-auto - "Want Karpenter/self-managed node groups we control" → rec-eks-karpenter - "Multi-tenant platform with heavy operator/CRD requirements" → rec-eks-platform ## Recommendations ### rec-ecs-fargate: Amazon ECS on Fargate Lowest-friction production container path on AWS. Deploy services without owning nodes, AMIs, or kubelets. **When to use:** - Steady production HTTP/gRPC services - Team wants containers without Kubernetes complexity - IAM-integrated networking and CloudWatch logging are enough **When NOT to use:** - You need Helm, operators, or CRDs — use EKS - You need GPUs or custom AMIs — use ECS on EC2 **AWS services:** - [DevOps Pipeline Setup](/services/devops-pipeline-setup/) - [AWS Application Modernization](/services/aws-application-modernization/) **Comparisons:** - [Lambda vs ECS Fargate](/compare/aws-lambda-vs-ecs-fargate/) - [ECS vs EKS](/compare/aws-ecs-vs-eks/) ### rec-ecs-ec2: Amazon ECS on EC2 Container orchestration with EC2-level control. Pick when Fargate cannot meet GPU, AMI, or reserved-capacity economics. **When to use:** - GPU workloads, custom AMIs, or specialized instance families - You can pack multiple services onto reserved/SP capacity **When NOT to use:** - You do not want to manage ASGs or capacity providers — use Fargate **AWS services:** - [DevOps Pipeline Setup](/services/devops-pipeline-setup/) **Comparisons:** - [ECS vs EKS](/compare/aws-ecs-vs-eks/) ### rec-ecs-hybrid: ECS capacity providers (Fargate + EC2) Run most services on Fargate and pin specialty workloads to EC2 capacity providers. Common healthy production shape. **When to use:** - Majority of services fit Fargate; a minority need GPUs or host networking quirks **When NOT to use:** - Everything needs Kubernetes APIs — consolidate on EKS instead of dual control planes **Comparisons:** - [ECS vs EKS](/compare/aws-ecs-vs-eks/) ### rec-eks-auto: Amazon EKS Auto Mode Managed Kubernetes with AWS-operated nodes, networking, and Karpenter-style autoscaling. Default EKS path when you need K8s without a large platform team. **When to use:** - You need Kubernetes ecosystem features - You want to minimize node and CNI operations **When NOT to use:** - You do not need Kubernetes at all — ECS Fargate is simpler **AWS services:** - [AWS Managed Services](/services/aws-managed-services/) - [DevOps Pipeline Setup](/services/devops-pipeline-setup/) **Comparisons:** - [ECS vs EKS](/compare/aws-ecs-vs-eks/) ### rec-eks-karpenter: Amazon EKS + Karpenter (self-managed nodes) EKS with Karpenter for flexible instance selection and consolidation. Choose when Auto Mode constraints conflict with your packing strategy. **When to use:** - You need fine-grained instance family control beyond Auto Mode defaults - Existing Karpenter investment and platform expertise **When NOT to use:** - Small team with no platform ownership — prefer EKS Auto Mode or ECS **AWS services:** - [DevOps Pipeline Setup](/services/devops-pipeline-setup/) **Comparisons:** - [ECS vs EKS](/compare/aws-ecs-vs-eks/) ### rec-eks-platform: Amazon EKS as an internal platform Multi-tenant Kubernetes with operators, CRDs, and team namespaces. Justified when multiple product teams share one control plane. **When to use:** - Internal developer platform serving many teams - Heavy use of operators and custom resources **When NOT to use:** - Single product team — ECS or a small EKS Auto Mode cluster is enough **AWS services:** - [AWS Application Modernization](/services/aws-application-modernization/) - [AWS Managed Services](/services/aws-managed-services/) **Comparisons:** - [ECS vs EKS](/compare/aws-ecs-vs-eks/) ### rec-app-runner: AWS App Runner Push a container or source repo; App Runner builds, deploys, scales, and serves it. Best for internal tools and early product, not complex multi-service platforms. **When to use:** - Single-container services with minimal networking requirements - Prototypes and internal tools **When NOT to use:** - Multi-service production platforms needing service mesh, sidecars, or advanced networking — ECS or EKS **Comparisons:** - [Lambda vs ECS Fargate](/compare/aws-lambda-vs-ecs-fargate/) ## FAQ ### Why is ECS Fargate the default when we do not need Kubernetes? ECS Fargate gives you container deployment, autoscaling, IAM-integrated networking, and CloudWatch logging without nodes or kubelets. EKS is more powerful but pays back its complexity only when you actually need the Kubernetes ecosystem. ### Does EKS Auto Mode replace the ECS vs EKS decision? No. Auto Mode lowers the operational tax of being on EKS — it does not make Kubernetes free. If you do not need Helm, operators, CRDs, or multi-tenancy patterns, ECS Fargate remains the simpler default. ### When do GPUs force ECS on EC2 or EKS? When inference or training needs GPU instances that Fargate does not cover for your shape, pin those services to ECS on EC2 or EKS with GPU node pools. Keep non-GPU services on Fargate where possible. --- *Source: https://www.factualminds.com/decide/which-aws-container-orchestration/*