How to build highly available Kubernetes applications with Amazon EKS Auto Mode

This article provides a comprehensive guide to building highly available Kubernetes applications using Amazon EKS Auto Mode, exploring various strategies to maintain service continuity during different operational scenarios.

• Key Kubernetes features for high availability include:
  • Pod Disruption Budgets (PDBs)
  • Pod Readiness Gates
  • Topology Spread Constraints
  • Termination Grace Periods
  • Liveness and Readiness Probes
• Test scenarios demonstrated application resilience through:
  • Pod failures
  • Node failures
  • Availability Zone outages
  • Cluster version upgrades
  • Karpenter node disruptions
• EKS Auto Mode balances high availability with cost optimization by:
  • Dynamically managing nodes
  • Applying security patches
  • Consolidating workloads

The article emphasizes that while EKS Auto Mode simplifies cluster management, implementing Kubernetes best practices is crucial for achieving true high availability.