Monitoring Redirects Can Create False Green Probes
A health probe that automatically follows redirects may end on an authentication page and report successful HTTP even though the original service route is wrong.
synthetic monitoring
DNS Is a Production Dependency, Not Plumbing
A production-engineering deep dive into dns is a production dependency, not plumbing, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
HTTPS Latency Needs More Than One Number
A single total probe duration hides whether slowness came from name resolution, TCP connection, TLS negotiation or server response.
TLS Certificate Expiration Is an Availability Incident Waiting to Happen
A production-engineering deep dive into tls certificate expiration is an availability incident waiting to happen, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
GitHub Actions as Five-Minute External Infrastructure
A production-engineering deep dive into github actions as five-minute external infrastructure, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
Dead-Man Monitoring Should Not Need a Credential from the Dead System
A production-engineering deep dive into dead-man monitoring should not need a credential from the dead system, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
I Deliberately Broke the Probe to Test the Monitoring System
A production-engineering deep dive into i deliberately broke the probe to test the monitoring system, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
Public and Internal Probes Answer Different Availability Questions
A service can be healthy on the LAN and unreachable through Cloudflare, TLS, DNS or authentication at the public edge.
Why a 302 Redirect Can Mean the Service Is Healthy
A production-engineering deep dive into why a 302 redirect can mean the service is healthy, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
Building a Dead-Man Monitor Outside the Machine It Watches
A production-engineering deep dive into building a dead-man monitor outside the machine it watches, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
Internal Probe and Public Probe Answer Different Questions
A production-engineering deep dive into internal probe and public probe answer different questions, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.