Networking
DNS, TCP, proxies, load balancers, TLS.
Networking
DNS, TCP, proxies, load balancers and TLS. The failures in this section share a property that makes them hard: the symptom appears at a layer far above the cause, and the metrics of the failing component usually look fine.
Written
None yet.
Planned
| Case study | Type |
|---|---|
| DNS resolution failure in a service mesh | Troubleshooting |
| Intermittent 502s from an upstream keepalive mismatch | Troubleshooting |
| TCP connection timeouts under load — backlog, TIME_WAIT, ephemeral ports | Troubleshooting |
| Load balancer health check flapping | Troubleshooting |
| TLS certificate expiry in production | Incident |
| nginx as a reverse proxy: timeouts, buffering, and upstream failover | Architecture |
Related projects
- IPMG — modular IP management and ping-monitoring CLI with parallel network scanning, subnet auto-discovery and scheduled monitoring.
Nothing here yet — content is on the roadmap.