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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 /src/api/admin/api_server.rs | |
| 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).
Diffstat (limited to 'src/api/admin/api_server.rs')
| -rw-r--r-- | src/api/admin/api_server.rs | 55 |
1 files changed, 33 insertions, 22 deletions
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(), + )) } } |