How to Migrate from ECS to EKS Without Rebuilding Your Deployment Pipeline (4 Options Compared)

An ECS-to-EKS migration can preserve existing CI workflows when pipelines remain focused on building, testing, tagging, and pushing immutable container images to Amazon ECR, with only the deployment command changing to Helm, GitOps, or an internal developer platform call. It maps ECS constructs such as task definitions, services, IAM roles, autoscaling, logging, secrets, and service discovery to Kubernetes equivalents, while emphasizing that operational responsibilities—including cluster upgrades, add-ons, networking, observability, RBAC, and capacity planning—represent the main migration effort. Four approaches are compared: self-managed Kubernetes with Helm and Argo CD or Flux for teams with platform expertise; AWS-native components for organizations building their own platform; consultancies for bespoke implementations that customers later operate; and platforms such as Qovery, which manage Kubernetes layers in a customer-owned cloud account. EKS introduces a roughly $73 monthly control-plane fee per cluster, whereas ECS has no orchestration charge, but compute costs are generally the same, making engineering time, idle non-production resources, and Kubernetes maintenance more significant cost factors. The recommended migration pattern is incremental and reversible, beginning with a low-risk stateless service, running ECS and EKS in parallel, shifting traffic gradually, and retaining ECS capacity for rollback until workloads are stable.

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