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Kubernetes Networking·May 7, 2026·13 min read

Your Cluster Has 5,000 Services and kube-proxy Is the Bottleneck. Welcome to the iptables Cliff.

Every Service create rewrites your entire iptables chain. At small scale you never notice. At 5,000 Services kube-proxy is at 100% CPU, Service updates take 30 seconds, and your latency p99 is in the seconds. Here is the cliff and how to fall off it.

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Kubernetes Networking·May 5, 2026·9 min read

Why Every Kubernetes Cluster Makes 5 DNS Queries For One Lookup

ndots:5 is the silent latency killer in Kubernetes. Every external hostname resolution generates four wasted queries before the right one. Here is why, and how to fix it.

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