Add tracing integration with opentelemetry

src/util/Cargo.toml

@@ -18,7 +18,7 @@ blake2 = "0.9"
 err-derive = "0.3"
 xxhash-rust = { version = "0.8", default-features = false, features = ["xxh3"] }
 hex = "0.4"
-log = "0.4"
+tracing = "0.1.30"
 rand = "0.8"
 sha2 = "0.9"
 

src/util/config.rs

@@ -104,6 +104,8 @@ pub struct WebConfig {
 pub struct AdminConfig {
 	/// Address and port to bind for admin API serving
 	pub bind_addr: SocketAddr,
+	/// OTLP server to where to export traces
+	pub otlp_export_traces_to: Option<String>,
 }
 
 fn default_sled_cache_capacity() -> u64 {

src/util/lib.rs

@@ -1,7 +1,7 @@
 //! Crate containing common functions and types used in Garage
 
 #[macro_use]
-extern crate log;
+extern crate tracing;
 
 pub mod background;
 pub mod config;