nsr_exporter

A Prometheus + OTLP metrics exporter for Dell EMC NetWorker backup servers.

A single process polls every configured NetWorker system on a background interval, caches an immutable snapshot, and serves /metrics (and an OTLP push) instantly from cache — so scrapes never reach the backend.

Architecture

collection loop → fetch all systems → build immutable Snapshot → SnapshotStore.Swap()
                                                                    ├── PromCollector  (/metrics)
                                                                    └── OTLPExporter   (push)

• Metrics catalog — every metric, its type, labels, and meaning.
• Architecture decisions — the load-bearing design choices.

Authentication

NetWorker authenticates with HTTP Basic on every request against /nwrestapi/v3/global. See ADR-0007.

Field-name validation

Several collectors use field names inferred from the NetWorker REST convention (marked // INFERRED in code). Confirm them against a live appliance with:

nsr_exporter --config real.yaml --once --debug --trace 2>trace.log | sort > samples.txt

A wrong guess surfaces as a missing metric in the dump, never a false zero.