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| author | Jakub Jirutka <jakub@jirutka.cz> | 2022-09-04 00:43:48 +0200 |
|---|---|---|
| committer | Jakub Jirutka <jakub@jirutka.cz> | 2022-09-06 01:15:09 +0200 |
| commit | ea36b9ff904a8300afb8fb1601cde88c915a810f (patch) | |
| tree | 73dd84bba384a79cacdbd4bdec01c5c9485d2c6b | |
| parent | e7af006c1c8211bf83b5d8abb7490ef270dd8345 (diff) | |
| download | garage-ea36b9ff904a8300afb8fb1601cde88c915a810f.tar.gz garage-ea36b9ff904a8300afb8fb1601cde88c915a810f.zip | |
Allow building without Prometheus exporter (/metrics endpoint)
prometheus and opentelemetry-prometheus add 7 extra dependencies in
total and increases the size of the garage binary by ~7 % (with
fat LTO).
| -rw-r--r-- | src/api/Cargo.toml | 5 | ||||
| -rw-r--r-- | src/api/admin/api_server.rs | 55 | ||||
| -rw-r--r-- | src/garage/Cargo.toml | 8 |
3 files changed, 41 insertions, 27 deletions
diff --git a/src/api/Cargo.toml b/src/api/Cargo.toml index 782054bd..ce2d11c0 100644 --- a/src/api/Cargo.toml +++ b/src/api/Cargo.toml @@ -54,10 +54,11 @@ quick-xml = { version = "0.21", features = [ "serialize" ] } url = "2.1" opentelemetry = "0.17" -opentelemetry-prometheus = "0.10" +opentelemetry-prometheus = { version = "0.10", optional = true } opentelemetry-otlp = { version = "0.10", optional = true } -prometheus = "0.13" +prometheus = { version = "0.13", optional = true } [features] k2v = [ "garage_util/k2v", "garage_model/k2v" ] +metrics = [ "opentelemetry-prometheus", "prometheus" ] telemetry-otlp = ["opentelemetry-otlp"] diff --git a/src/api/admin/api_server.rs b/src/api/admin/api_server.rs index c3b16715..d871d4e2 100644 --- a/src/api/admin/api_server.rs +++ b/src/api/admin/api_server.rs @@ -3,13 +3,14 @@ use std::sync::Arc; use async_trait::async_trait; use futures::future::Future; -use http::header::{ - ACCESS_CONTROL_ALLOW_METHODS, ACCESS_CONTROL_ALLOW_ORIGIN, ALLOW, CONTENT_TYPE, -}; +use http::header::{ACCESS_CONTROL_ALLOW_METHODS, ACCESS_CONTROL_ALLOW_ORIGIN, ALLOW}; use hyper::{Body, Request, Response}; -use opentelemetry::trace::{SpanRef, Tracer}; +use opentelemetry::trace::SpanRef; + +#[cfg(feature = "metrics")] use opentelemetry_prometheus::PrometheusExporter; +#[cfg(feature = "metrics")] use prometheus::{Encoder, TextEncoder}; use garage_model::garage::Garage; @@ -25,6 +26,7 @@ use crate::admin::router::{Authorization, Endpoint}; pub struct AdminApiServer { garage: Arc<Garage>, + #[cfg(feature = "metrics")] exporter: PrometheusExporter, metrics_token: Option<String>, admin_token: Option<String>, @@ -32,7 +34,6 @@ pub struct AdminApiServer { impl AdminApiServer { pub fn new(garage: Arc<Garage>) -> Self { - let exporter = opentelemetry_prometheus::exporter().init(); let cfg = &garage.config.admin; let metrics_token = cfg .metrics_token @@ -44,7 +45,8 @@ impl AdminApiServer { .map(|tok| format!("Bearer {}", tok)); Self { garage, - exporter, + #[cfg(feature = "metrics")] + exporter: opentelemetry_prometheus::exporter().init(), metrics_token, admin_token, } @@ -71,22 +73,31 @@ impl AdminApiServer { } fn handle_metrics(&self) -> Result<Response<Body>, Error> { - let mut buffer = vec![]; - let encoder = TextEncoder::new(); - - let tracer = opentelemetry::global::tracer("garage"); - let metric_families = tracer.in_span("admin/gather_metrics", |_| { - self.exporter.registry().gather() - }); - - encoder - .encode(&metric_families, &mut buffer) - .ok_or_internal_error("Could not serialize metrics")?; - - Ok(Response::builder() - .status(200) - .header(CONTENT_TYPE, encoder.format_type()) - .body(Body::from(buffer))?) + #[cfg(feature = "metrics")] + { + use opentelemetry::trace::Tracer; + + let mut buffer = vec![]; + let encoder = TextEncoder::new(); + + let tracer = opentelemetry::global::tracer("garage"); + let metric_families = tracer.in_span("admin/gather_metrics", |_| { + self.exporter.registry().gather() + }); + + encoder + .encode(&metric_families, &mut buffer) + .ok_or_internal_error("Could not serialize metrics")?; + + Ok(Response::builder() + .status(200) + .header(http::header::CONTENT_TYPE, encoder.format_type()) + .body(Body::from(buffer))?) + } + #[cfg(not(feature = "metrics"))] + Err(Error::bad_request( + "Garage was built without the metrics feature".to_string(), + )) } } diff --git a/src/garage/Cargo.toml b/src/garage/Cargo.toml index 8573e2fc..553ac57a 100644 --- a/src/garage/Cargo.toml +++ b/src/garage/Cargo.toml @@ -55,9 +55,9 @@ tokio = { version = "1.0", default-features = false, features = ["rt", "rt-multi netapp = "0.4" opentelemetry = { version = "0.17", features = [ "rt-tokio" ] } -opentelemetry-prometheus = "0.10" +opentelemetry-prometheus = { version = "0.10", optional = true } opentelemetry-otlp = { version = "0.10", optional = true } -prometheus = "0.13" +prometheus = { version = "0.13", optional = true } [dev-dependencies] aws-sdk-s3 = "0.8" @@ -74,9 +74,11 @@ base64 = "0.13" [features] -default = [ "bundled-libs" ] +default = [ "bundled-libs", "metrics" ] kubernetes-discovery = [ "garage_rpc/kubernetes-discovery" ] k2v = [ "garage_util/k2v", "garage_api/k2v" ] +# Prometheus exporter (/metrics endpoint). +metrics = [ "garage_api/metrics", "opentelemetry-prometheus", "prometheus" ] # Exporter for the OpenTelemetry Collector. telemetry-otlp = [ "opentelemetry-otlp", "garage_api/telemetry-otlp" ] |