An Ambient mode troubleshooting appendix covering two Istio and Envoy issues encountered in production.
July 13, 2026DevOps engineer at Channel.io, based in South Korea. Interested in Computer Networks, Cloud Native, and Homelab-ing. More about me →
Recent posts
- Istio Part 3-4: Detecting 507 Status Codes and istiod Disconnections
- Istio Part 3-3: Safely Upgrading Ambient Mode
A runbook for upgrading Istio Ambient mode.
July 8, 2026 - Istio Part 3-2: Partially Enrolled Pods and the Untaint Controller
Ambient mode troubleshooting: when Pods are scheduled before istio-cni is ready on a node.
July 2, 2026 - Istio Part 3-1: 503 and Half-open Connections
Ambient mode troubleshooting: 503 errors caused by Envoy reusing stale connections.
June 26, 2026 - How would you answer "Why does a CPU throttle?"
A short piece about reading the hidden intent behind the simple question "Why does a CPU throttle?"
April 15, 2026