Observability
See your app break before your users do.
Life
is
good.
Your app has run well since the first deploy. Reviews are great. Only a very few unhappy users.
Everything falls apart.
Support is flooded with calls. Users can't do their daily tasks.
Devs work around the clock, debugging by hand, hunting for the real error that took the app down.
(it was not fine)
Wouldn't it be nice...
Good news. Keep turning the page.
Observability
It lets you see the state of your app as it reacts to user interactions and real-world events.
Three pillars
what happened
how much, how fast
the path one request took
Together they show you what broke, where and why.
A trace is a map.
One request hops through many services. A trace draws the whole path — every hop, every delay.
The slow hop is never where you guess.
Logs → Metrics → Traces
Three signals, one picture. Start with a metric, drill into a trace, read the log.
Each one answers a different question.
Phones ring. Devs debug by hand. Users find the bug before you do.
An alert fires. You see the failing step. It's fixed before the phones ring.
Catch it on time.
Spot issues early. Save your company time and money.