Crate scuffle_bootstrap_telemetry

A crate used to add telemetry to applications built with the scuffle-bootstrap crate.

Emit metrics using the scuffle-metrics crate.

See the changelog for a full release history.

Feature flags

• prometheus (enabled by default) — Enables prometheus support
• pprof (enabled by default) — Enables pprof profiling
• opentelemetry (enabled by default) — Enables opentelemetry
• opentelemetry-metrics (enabled by default) — Enables opentelemetry metricx exporting
• opentelemetry-traces (enabled by default) — Enables opentelemetry trace exporting
• opentelemetry-logs (enabled by default) — Enables opentelemetry log exporting
• docs — Enables changelog and documentation of feature flags See TelemetrySvc for more details.

Example

use std::net::SocketAddr;
use std::sync::Arc;

use scuffle_bootstrap::global::GlobalWithoutConfig;
use scuffle_bootstrap_telemetry::{
    prometheus_client,
    opentelemetry,
    opentelemetry_sdk,
    TelemetryConfig,
    TelemetrySvc
};

struct Global {
    prometheus: prometheus_client::registry::Registry,
    open_telemetry: opentelemetry::OpenTelemetry,
}

impl GlobalWithoutConfig for Global {
    async fn init() -> anyhow::Result<Arc<Self>> {
        // Initialize the Prometheus metrics registry.
        let mut prometheus = prometheus_client::registry::Registry::default();
        // The exporter converts opentelemetry metrics into the Prometheus format.
        let exporter = scuffle_metrics::prometheus::exporter().build();
        // Register the exporter as a data source for the Prometheus registry.
        prometheus.register_collector(exporter.collector());

        // Initialize the OpenTelemetry metrics provider and add the Prometheus exporter as a reader.
        let metrics = opentelemetry_sdk::metrics::SdkMeterProvider::builder()
            .with_reader(exporter)
            .build();
        opentelemetry::global::set_meter_provider(metrics.clone());

        // Initialize the OpenTelemetry configuration instance.
        let open_telemetry = opentelemetry::OpenTelemetry::new().with_metrics(metrics);

        Ok(Arc::new(Self {
            prometheus,
            open_telemetry,
        }))
    }
}

impl TelemetryConfig for Global {
    fn bind_address(&self) -> Option<SocketAddr> {
        // Tells the http server to bind to port 8080 on localhost.
        Some(SocketAddr::from(([127, 0, 0, 1], 8080)))
    }

    fn prometheus_metrics_registry(&self) -> Option<&prometheus_client::registry::Registry> {
        Some(&self.prometheus)
    }

    fn opentelemetry(&self) -> Option<&opentelemetry::OpenTelemetry> {
        Some(&self.open_telemetry)
    }
}

#[scuffle_metrics::metrics]
mod example {
    use scuffle_metrics::{CounterU64, MetricEnum};

    #[derive(MetricEnum)]
    pub enum Kind {
        Http,
        Grpc,
    }

    #[metrics(unit = "requests")]
    pub fn request(kind: Kind) -> CounterU64;
}

// Now emit metrics from anywhere in your code using the `example` module.
example::request(example::Kind::Http).incr();

scuffle_bootstrap::main! {
    Global {
        TelemetrySvc,
    }
};

License

This project is licensed under the MIT or Apache-2.0 license. You can choose between one of them if you use this work.

SPDX-License-Identifier: MIT OR Apache-2.0

Modules

opentelemetryopentelemetry

Opentelemetry support

changelog

Changelogs generated by [scuffle_changelog]

Structs

TelemetrySvc

The telemetry service.

Traits

TelemetryConfig

Implement this trait to configure the telemetry service.

Re-exports

pub use opentelemetry_appender_tracing;opentelemetry-logs

pub use opentelemetry_sdk;opentelemetry

pub use prometheus_client;prometheus

pub use tracing_opentelemetry;opentelemetry-traces