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#http2

2 stories

Networking & DNS Bug Report

Scaled to 10 pods, one pod at 100% CPU: gRPC connections pinned behind a ClusterIP Service

Priya Raghavan · Sep 29, 2026 · 7 min read

Our pricing service scaled from 3 to 10 replicas under load, but one pod stayed at 100% CPU while others idled. gRPC uses long-lived HTTP/2 connections, and a ClusterIP Service balances connections, not requests. How we found it and fixed it with client-side load balancing, a headless Service and MaxConnectionAge.

Banner: debugging HTTP requests from the terminal with curl timing and header output

Networking & DNS

Debugging HTTP with curl: headers, DNS overrides, timing and TLS

Daniel Tran · Oct 7, 2025 · 8 min read

Most HTTP bugs can be pinned down with one tool you already have. This guide shows the curl options we use daily: verbose output, header-only requests, --resolve and --connect-to for testing servers before DNS changes, timing breakdowns, protocol versions and TLS checks.