모든 지표는 green-ok이지만 사용자는 로그인할 수 없습니다
Source: Dev.to
Why Green Dashboards Lie
Here’s what we tell ourselves: if CPU is low, memory is available, and HTTP is 200 OK, the system must be working.
This assumption is wrong.
Infrastructure metrics measure potential, not reality. They tell you your system could work. They don’t tell you it is working.
It’s like saying your car is absolutely fine because the tank is full of gas, while you have two flat tires and no steering wheel.
Infrastructure metrics are necessary, but they’re not the big picture.
How to Build a Complete Monitoring Strategy
Combine infrastructure metrics with workflow validation:
Infrastructure layer (traditional monitoring)
- CPU, memory, disk, network utilization
- Process health checks
- Resource saturation metrics
Network layer
- TCP port connectivity
- DNS resolution
- TLS handshake success
- Certificate expiry
Application layer
- HTTP response codes
- API endpoint availability
- Response time percentiles
Business logic layer (workflow monitoring)
- User registration completes end‑to‑end
- Login → session → data fetch works
- Checkout → payment → confirmation succeeds
- Password reset emails actually send
Each layer catches different failure modes. Infrastructure metrics catch capacity issues. Network checks catch connectivity problems. Application metrics catch crashes. Workflow checks catch the subtle breaks where everything looks healthy.
Start With Your Critical Path
You don’t need to monitor every possible user journey. Start with the one workflow that would cause panic if it broke—e.g., Registration or the main value proposition.
Then build a basic check that verifies this workflow:
- Can a user actually create an account?
- Can a user actually click that button and have it do what it’s supposed to?
Shift from “are our servers healthy?” to “can users accomplish what they came here to do?”
Conclusion
Your infrastructure metrics will tell you when capacity runs low, when processes crash, and when disk fills up.
They won’t tell you when authentication tokens expire, when APIs return errors wrapped in 200 responses, or when background jobs stop processing.
If you want to know whether your system actually works, test it the way users experience it. Try to do what they do. Verify it works end‑to‑end.
There’s a difference between monitoring infrastructure and monitoring user experience, and that’s why I built Monitrics.