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Docker Datacenter to EKS Migration

From on‑prem Docker Datacenter to Amazon EKS with GitOps, IaC, and phased cutover—reducing ops toil while improving reliability.

Challenge

A fintech company ran legacy workloads on an on‑prem Docker Datacenter cluster with aging hardware, manual deployments, and limited observability. They needed a secure path to managed Kubernetes on AWS without long downtime.

Solution

  • Designed multi‑account AWS landing zone and network (VPCs, subnets, TGWs, Direct Connect/VPN) via Terraform
  • Provisioned EKS clusters with managed node groups and IRSA; standardized cluster add‑ons via Helm umbrellas
  • Implemented GitOps (Argo CD) for app/infra delivery; templated Helm charts for 12‑factor services
  • Built CI pipelines (GitLab/GitHub Actions) with SBOMs, container signing, and image scans
  • Created a phased migration plan with blue/green DNS, data sync jobs, and runbooks for rollback
  • Established observability: Prometheus metrics, Loki/CloudWatch logs, Grafana dashboards, SLOs/alerts

Impact

  • Cut deployment time from hours to minutes with repeatable pipelines
  • Increased reliability with managed control plane and autoscaling nodes
  • Improved security posture (IRSA, least‑privilege IAM, private networking)
  • Reduced on‑prem hardware footprint and maintenance costs