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docs: note that same-system FastStream brokers share a Prometheus broker label #301

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lesnik512 merged 1 commit into from
Oct 24, 2026
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docs: note that same-system FastStream brokers share a Prometheus broker label #301

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7 changes: 6 additions & 1 deletion docs/integrations/faststream.md
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Expand Up @@ -88,4 +88,9 @@ bootstrapper_config = FastStreamConfig(
```

A broker whose type has no middleware class is left uninstrumented, and `bootstrap()` warns with its
type name. All brokers share one Prometheus registry; each metric's `broker` label tells them apart.
type name.

All brokers share one Prometheus registry. Each metric's `broker` label holds the messaging system,
such as `kafka` or `redis`, so it separates a Kafka broker from a Redis broker. Two brokers on the same
system get the same label, and if both have a handler with the same name, their counts merge into
one series.
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