8 documented AWS EKS cost inefficiencies, each with how to detect it and how to fix it.
AWS EKSCER-0298
Kubernetes Jobs or CronJobs running on EKS Fargate leave completed or failed pod objects in the cluster indefinitely. Although the workload execution has finished, AWS keeps the underlying Fargate microVM running to allow log inspection...
AWS EKSCER-0280
Pod resource requests - often inflated by sidecar containers-push total memory or CPU just over a Fargate sizing boundary. Because Fargate adds mandatory system overhead and only supports fixed resource combinations, small incremental...
AWS EKSCER-0120
In EKS environments, cluster sprawl can occur when workloads are removed but underlying resources remain. Common issues include persistent volumes no longer mounted by pods, services still backed by ELBs despite being unused, and...
AWS EKSCER-0192
In Kubernetes environments, resources such as ConfigMaps, Secrets, Services, and Persistent Volume Claims (PVCs) are often created dynamically by applications or deployment pipelines. When applications are removed or reconfigured, these...
AWS EKSCER-0004
Workloads with consistently low CPU and memory usage may no longer serve active traffic or scheduled tasks, but continue reserving resources within the cluster. These idle deployments often remain after project migrations, feature...
AWS EKSCER-0061
Clusters that no longer run active workloads but remain provisioned continue incurring hourly control plane costs and may also maintain associated infrastructure like node groups or VPC components. Inactive clusters often persist after...
AWS EKSCER-0077
When an EKS cluster remains on a Kubernetes version that has reached the end of standard support, AWS begins charging an additional Extended Support fee. These charges often arise from delays in upgrade cycles, uncertainty about workload...
AWS EKSCER-0500
Multi-AZ EKS clusters are the recommended default, but Kubernetes Service routing does not take Availability Zones into account unless told to. On EKS, kube-proxy distributes traffic for a Service across all of its endpoints in the cluster...
