Module telemetry 

OpenTelemetry metrics. Every instrument the gateway emits lives on one GatewayMetrics, passed explicitly (there is no global recorder). The Prometheus and OTLP exporters sit behind the server feature.

Re-exports

pub use exporter::install;

pub use exporter::metrics_router;

pub use exporter::MetricsExporter;

Structs

GatewayMetrics

Every instrument the gateway records. Build once, share behind an Arc.

MetricsExporter

The Prometheus registry plus the provider feeding it. Keep it alive for the process lifetime: dropping the last provider handle shuts every reader down, and scrapes come back empty.

Constants

SECONDS_BUCKETS

Second-scaled histogram boundaries; OTel’s defaults are millisecond-scaled.

Functions

install

Build the meter provider and the gateway’s instruments. Prometheus is always on; OTLP/HTTP is added when otlp_endpoint (a base collector URL such as http://collector:4318) is set. opentelemetry-otlp 0.32 uses programmatic endpoints verbatim, so /v1/metrics is appended here.

metrics_router

GET /metrics (and GET /) in Prometheus text format.

seconds_histogram

A duration histogram in seconds with SECONDS_BUCKETS boundaries.