WireGuard VPN connection failure after switching to Cilium eBPF due to IP range conflict — resolved by migrating to a non-overlapping subnet

Java app ran out of memory, triggering the OOM Killer and taking down a worker node — JVM memory configuration analysis and fix

Confirming automatic EIP assignment to internet-facing ALB is expected AWS behavior, and cost analysis

NLB vs ALB - OSI layer, routing, performance, CloudFront integration, and practical selection criteria

Full checklist for diagnosing EKS node group join failures - VPC DNS, subnet tags, security groups, and eks-auth VPC Endpoint