Athenahealth leveraged Amazon EKS Hybrid Nodes to unify its Kubernetes infrastructure across cloud and on-premises environments, achieving significant improvements in response times and operational efficiency while adhering to strict healthcare data residency and compliance requirements.
- 50% reduction in hardware and operational costs
- 50% faster response times for latency-sensitive workloads
- Unified Kubernetes cluster spanning cloud and on-premises
Infrastructure signal
Athenahealth's modernization relied on Amazon EKS Hybrid Nodes, which enable running Kubernetes worker nodes on-premises alongside cloud nodes under a single control plane hosted in an AWS Region. This architecture separates data and control planes, with the control plane managed fully by AWS to handle upgrades, high availability, and scaling. Hybrid nodes connect securely via private links such as AWS Direct Connect, ensuring compliance with healthcare data residency and security mandates.
The deployment utilizes AWS Outposts to keep sensitive electronic health record (EHR) and patient portal workloads adjacent to data that must remain on-site. It leverages common AWS services across environments, including IAM for authentication, CloudWatch for observability, and Systems Manager for node lifecycle management. Network traffic is locked down with Clusterwide Network Policies and localized ingress through network appliances to reduce exposure.
Developer impact
Developers and platform operators benefit from a consistent Kubernetes operating model across hybrid environments, eliminating the complexity of managing separate clusters or control planes. The single EKS cluster approach means deployment tooling, pod scheduling, and monitoring workflows remain uniform whether workloads run in the cloud or on-premises, simplifying CI/CD pipelines and operational runbooks.
Upgrades for cloud nodes are automated via APIs or cluster autoscaling tools, while hybrid node upgrades require a dedicated CLI tool, enabling controlled, policy-driven maintenance that aligns with compliance needs. The hybrid cluster supports integrated identity management and logging, which enhances debugging and security investigations with no loss of cloud-native developer experience.
What teams should watch
Teams that manage latency-critical applications with compliance or data residency constraints should evaluate Amazon EKS Hybrid Nodes to balance performance with consistent operational governance. This model allows strategic workload placement—placing sensitive or latency-sensitive components on-premises without sacrificing scalability and automation benefits available in the cloud.
Security and network teams must ensure private, low-latency connectivity between on-premises nodes and the EKS control plane, validating that traffic flows conform to organizational policies. Observability teams should integrate CloudWatch metrics for both on-premises and cloud workloads to maintain comprehensive visibility, enabling proactive troubleshooting and capacity planning across hybrid boundaries.