Derive service dependency graph metrics from OTel traces using the Collector's service graph connector
domain: github.com · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Add a `service_graph` connector to the Collector config (the older `servicegraph` name still works but is deprecated)
Configure `latency_histogram_buckets` (or `exponential_histogram_max_size`, not both) and any extra `dimensions`
Set `store.ttl` and `store.max_items` to size the in-memory span-pairing cache for your traffic
Wire a traces pipeline with the connector as an exporter, and a separate metrics pipeline with the connector as a receiver feeding a metrics exporter (e.g. Prometheus)
If spans of a single trace can land on different Collector instances, add a load-balancing exporter upstream so client/server spans pair correctly
Point your tracing backend's service graph view (e.g. Tempo) at the resulting metrics
Known gotchas
Client and server spans of the same request must reach the same Collector instance to be paired, or requests show up as unpaired/dropped
The default `store.ttl` is very short (2s) and may need raising for slow backends
The connector is still alpha, so metric names and options can change between releases
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