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Make OTLP exporter optional via feature "telemetry-otlp"

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opentelemetry-otlp add 48 (!) extra dependencies and increases the
size of the garage binary by ~11 % (with fat LTO).
This commit is contained in:
Jakub Jirutka 2022-09-03 23:40:44 +02:00
parent db72812f01
commit e7af006c1c
4 changed files with 13 additions and 3 deletions
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3
src/api/Cargo.toml
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@ -55,8 +55,9 @@ url = "2.1"
opentelemetry = "0.17"
opentelemetry-prometheus = "0.10"
opentelemetry-otlp = "0.10"
opentelemetry-otlp = { version = "0.10", optional = true }
prometheus = "0.13"
[features]
k2v = [ "garage_util/k2v", "garage_model/k2v" ]
telemetry-otlp = ["opentelemetry-otlp"]

4
src/garage/Cargo.toml
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@ -56,7 +56,7 @@ netapp = "0.4"
opentelemetry = { version = "0.17", features = [ "rt-tokio" ] }
opentelemetry-prometheus = "0.10"
opentelemetry-otlp = "0.10"
opentelemetry-otlp = { version = "0.10", optional = true }
prometheus = "0.13"
[dev-dependencies]
@ -77,6 +77,8 @@ base64 = "0.13"
default = [ "bundled-libs" ]
kubernetes-discovery = [ "garage_rpc/kubernetes-discovery" ]
k2v = [ "garage_util/k2v", "garage_api/k2v" ]
# Exporter for the OpenTelemetry Collector.
telemetry-otlp = [ "opentelemetry-otlp", "garage_api/telemetry-otlp" ]
# NOTE: bundled-libs and system-libs should be treat as mutually exclusive;
# exactly one of them should be enabled.

1
src/garage/main.rs
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@ -8,6 +8,7 @@ mod admin;
mod cli;
mod repair;
mod server;
#[cfg(feature = "telemetry-otlp")]
mod tracing_setup;
use std::net::SocketAddr;

8
src/garage/server.rs
View File

@ -15,6 +15,7 @@ use garage_web::run_web_server;
use garage_api::k2v::api_server::K2VApiServer;
use crate::admin::*;
#[cfg(feature = "telemetry-otlp")]
use crate::tracing_setup::*;
async fn wait_from(mut chan: watch::Receiver<bool>) {
@ -36,9 +37,14 @@ pub async fn run_server(config_file: PathBuf) -> Result<(), Error> {
info!("Initializing Garage main data store...");
let garage = Garage::new(config.clone(), background)?;
info!("Initialize tracing...");
if let Some(export_to) = config.admin.trace_sink {
info!("Initialize tracing...");
#[cfg(feature = "telemetry-otlp")]
init_tracing(&export_to, garage.system.id)?;
#[cfg(not(feature = "telemetry-otlp"))]
warn!("Garage was built without OTLP exporter, admin.trace_sink is ignored.");
}
info!("Initialize Admin API server and metrics collector...");