From 8c2fb0c066af7f68fdcfcdec96fa030af059bf63 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Thu, 17 Feb 2022 23:28:23 +0100
Subject: Add tracing integration with opentelemetry

---
 src/admin/tracing_setup.rs | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 src/admin/tracing_setup.rs

(limited to 'src/admin/tracing_setup.rs')

diff --git a/src/admin/tracing_setup.rs b/src/admin/tracing_setup.rs
new file mode 100644
index 00000000..83fa5622
--- /dev/null
+++ b/src/admin/tracing_setup.rs
@@ -0,0 +1,37 @@
+use std::time::Duration;
+
+use opentelemetry::sdk::{
+	trace::{self, IdGenerator, Sampler},
+	Resource,
+};
+use opentelemetry::KeyValue;
+use opentelemetry_otlp::WithExportConfig;
+
+use garage_util::data::*;
+use garage_util::error::*;
+
+pub fn init_tracing(export_to: &str, node_id: Uuid) -> Result<(), Error> {
+	let node_id = hex::encode(&node_id.as_slice()[..8]);
+
+	opentelemetry_otlp::new_pipeline()
+		.tracing()
+		.with_exporter(
+			opentelemetry_otlp::new_exporter()
+				.tonic()
+				.with_endpoint(export_to)
+				.with_timeout(Duration::from_secs(3)),
+		)
+		.with_trace_config(
+			trace::config()
+				.with_id_generator(IdGenerator::default())
+				.with_sampler(Sampler::TraceIdRatioBased(0.01f64))
+				.with_resource(Resource::new(vec![
+					KeyValue::new("service.name", "garage"),
+					KeyValue::new("service.instance.id", node_id),
+				])),
+		)
+		.install_batch(opentelemetry::runtime::Tokio)
+		.ok_or_message("Unable to initialize tracing")?;
+
+	Ok(())
+}
-- 
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