Here are 20 advanced configuration tricks and considerations for Amazon EKS to optimize performance, reliability, security, and cost:
Performance Optimization
- Strategic Use of Instance Types: Select EC2 instance types that precisely match your workload requirements. Consider newer generations and specialized instances (e.g., Graviton).
-
Optimized Networking with VPC CNI: Leverage the AWS VPC CNI for high-performance networking. Tune its configurations, like IP address allocation strategies. Consider using
prefix delegation. - Custom Networking: Explore custom networking options for advanced use cases like secondary network interfaces for pods.
-
kube-proxyin IPVS Mode: For larger clusters, consider runningkube-proxyin IPVS mode for better scalability. - CoreDNS Optimization: Fine-tune CoreDNS settings like caching and upstream DNS servers. Consider node-local DNS caching.
- Resource Requests and Limits: Accurately define resource requests and limits for your pods.
- Horizontal Pod Autoscaler (HPA) and Vertical Pod Autoscaler (VPA): Implement HPA and consider VPA for automatic scaling.
- KEDA (Kubernetes Event-driven Autoscaling): Scale workloads based on events from various sources.
- Node Autoscaling with Cluster Autoscaler and Karpenter: Automatically adjust the number of worker nodes. Explore Karpenter for advanced scaling.
- Storage Class Optimization: Choose the appropriate StorageClass considering performance, cost, and access modes.
Reliability and Availability
- Multi-AZ Deployments: Ensure your EKS cluster and worker nodes span multiple Availability Zones.
- Pod Anti-Affinity Rules: Use pod anti-affinity rules to spread replicas across different nodes and AZs.
- Health Checks (Liveness and Readiness Probes): Implement comprehensive liveness and readiness probes for your containers.
- Properly Configured Control Plane Logs: Enable and monitor control plane logs for troubleshooting and security analysis.
Security
- Network Policies: Implement Kubernetes Network Policies to control network traffic between pods.
- IAM Roles for Service Accounts (IRSA): Grant fine-grained IAM permissions to your pods.
- Pod Security Policies (PSPs) or Pod Security Admission (PSA): Enforce security standards for your pods. Migrate to PSA.
- Secrets Management: Securely manage sensitive information using Kubernetes Secrets and consider integration with AWS Secrets Manager or HashiCorp Vault.
- EKS Add-ons and their Configuration: Carefully manage and configure EKS add-ons and keep them up-to-date.
Cost Optimization
- Spot Instances: Utilize EC2 Spot Instances for non-critical workloads and implement strategies for handling interruptions.
Leave a Reply