What observability is
Observability is the ability to infer a system's internal state from what it emits: metrics, logs and traces. The more observable a system is, the faster you move from a symptom to a cause, without guessing.
In IT operations, observability is not a specific product and not a synonym of monitoring. It is a design criterion: instrument so you can ask questions that were not anticipated when the dashboard was built.
Where the term comes from
The idea comes from control theory: a system is observable if its internal state can be reconstructed from its outputs. In software and infrastructure, those outputs are telemetry. It does not replace classical monitoring; it extends it when systems are distributed, short-lived and hard to walk by hand.
Three pillars
Metrics
Aggregated measurements over time: CPU, disk saturation, p95 latency, error rate. They are cheap to store and good at spotting drift. Alone, they rarely explain why.
Logs
Discrete, immutable events with context. A well-formed log says which process, on which host, with which correlation id and which outcome. They help debug and audit. Ungoverned, they become noise.
Traces
The path of a request across services, queues and databases. They link a frontend symptom to a bottleneck three hops back. In classic infrastructure, the analogue is following a transaction or a job across several systems.
Observability, monitoring and APM
Monitoring answers known questions: is the host up? is the trigger in problem? APM samples application performance with dashboards and thresholds. Observability is for unknown unknowns: correlating signals, seeing dependencies and understanding the what, where and why of an incident.
In practice they coexist. Zabbix is strong at infrastructure metrics and events. Grafana is strong at rendering series and joining sources. Neither, by itself, guarantees observability: you still need judgement about what to instrument, how to correlate and what to ignore.
Why it matters with Zabbix and Grafana
Many IT estates already run Zabbix for hosts, SNMP, agents and triggers, and Grafana for dashboards. The gap is often the seam: a Grafana incident does not explain a Zabbix trigger; a host map does not explain an application trace. Obsernia exists to work that seam with its own tools, without replacing those platforms.
What it is not
- Not a marketing wrap around “more dashboards”.
- Not an affiliation with Zabbix or Grafana Labs.