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Debugging Istio Service Mesh Issues

Systematic approach to diagnosing Istio problems: istioctl proxy-status, proxy-config, analyze, and Envoy admin API.

🎯Key Takeaways
istioctl proxy-status: check sidecar sync status
istioctl analyze: automated config validation
Envoy admin API (:15000/config_dump): full proxy config dump

Debugging Istio Service Mesh Issues

Systematic approach to diagnosing Istio problems: istioctl proxy-status, proxy-config, analyze, and Envoy admin API.

~1 min read
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What you'll learn
  • istioctl proxy-status: check sidecar sync status
  • istioctl analyze: automated config validation
  • Envoy admin API (:15000/config_dump): full proxy config dump

Istio Debug Toolkit

Key commands: `istioctl proxy-status` (check sidecar sync — SYNCED vs STALE vs NOT SENT), `istioctl proxy-config cluster <pod>` (what upstreams does this pod know?), `istioctl analyze` (automated config validation), `kubectl logs -c istio-proxy` (Envoy access logs). Envoy admin API on :15000/config_dump shows full config.

Key takeaways

  • istioctl proxy-status: check sidecar sync status
  • istioctl analyze: automated config validation
  • Envoy admin API (:15000/config_dump): full proxy config dump

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