VPC

A Missing VPC Endpoint Routed Every Image Pull Through NAT Gateway, and Our AWS Bill Jumped 9x

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A Missing VPC Endpoint Routed Every Image Pull Through NAT Gateway, and Our AWS Bill Jumped 9x

By KP  |  TZoneLabs  |  DevOps & Cloud Engineering Our AWS bill for a new EKS environment came in nine times higher than the month before, and nothing about our traffic had changed. The entire difference was NAT Gateway data processing — a private-subnet VPC with no Gateway Endpoint for S3 was routing every ECR … Read more

Your EKS Nodes Run Out of IPs, Not CPU: A Practical Guide to VPC CNI Warming and Prefix Delegation

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Your EKS Nodes Run Out of IPs, Not CPU: A Practical Guide to VPC CNI Warming and Prefix Delegation

By KP  |  TZoneLabs  |  DevOps & Cloud Engineering Most engineers size EKS nodes by CPU and memory. We did too — until one day a pod sat in Pending, the node had plenty of compute free, and the events said something about failing to assign an IP. That was our introduction to the quietest … Read more