feat: improve log level control

- Adjust method instrumentation span to debug verbosity
- Separate service log verbosity from RUST_LOG so dependency logging and
service logging can be adjusted independently

Cargo.toml

@@ -27,7 +27,7 @@ tonic = "0.10.2"
 tonic-reflection = "0.10.2"
 tower = "0.4.13"
 tracing = "0.1.40"
-tracing-subscriber = "0.3.18"
+tracing-subscriber = {  version = "0.3.18", features = ["env-filter"] }
 
 [build-dependencies]
 tonic-build = { version = "0.10.2", features = ["prost"] }

src/features/app/interface.rs

@@ -8,7 +8,7 @@ use tonic::{Request, Response, Status};
 
 #[tonic::async_trait]
 impl App for AppService {
-    #[tracing::instrument]
+    #[tracing::instrument(level = "debug")]
     async fn get_rating(
         &self,
         request: Request<GetRatingRequest>,

src/features/user/interface.rs

@@ -15,7 +15,7 @@ use crate::{
 
 #[tonic::async_trait]
 impl User for UserService {
-    #[tracing::instrument]
+    #[tracing::instrument(level = "debug")]
     async fn authenticate(
         &self,
         request: Request<AuthenticateRequest>,
@@ -43,7 +43,7 @@ impl User for UserService {
         }
     }
 
-    #[tracing::instrument]
+    #[tracing::instrument(level = "debug")]
     async fn delete(&self, request: Request<()>) -> Result<Response<()>, Status> {
         let app_ctx = request.extensions().get::<AppContext>().unwrap().clone();
         let Claims {
@@ -56,7 +56,7 @@ impl User for UserService {
         }
     }
 
-    #[tracing::instrument]
+    #[tracing::instrument(level = "debug")]
     async fn vote(&self, request: Request<VoteRequest>) -> Result<Response<()>, Status> {
         let app_ctx = request.extensions().get::<AppContext>().unwrap().clone();
         let Claims {
@@ -78,7 +78,7 @@ impl User for UserService {
         }
     }
 
-    #[tracing::instrument]
+    #[tracing::instrument(level = "debug")]
     async fn list_my_votes(
         &self,
         request: Request<ListMyVotesRequest>,
@@ -105,7 +105,7 @@ impl User for UserService {
         }
     }
 
-    #[tracing::instrument]
+    #[tracing::instrument(level = "debug")]
     async fn get_snap_votes(
         &self,
         request: Request<GetSnapVotesRequest>,

src/main.rs

@@ -1,3 +1,5 @@
+use tracing_subscriber::EnvFilter;
+
 mod app;
 mod features;
 mod utils;
@@ -6,21 +8,17 @@ mod utils;
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let config = utils::Config::load()?;
 
-    let log_level = match config.log_level.as_str() {
-        "debug" => tracing::Level::DEBUG,
-        "info" => tracing::Level::INFO,
-        "warn" => tracing::Level::WARN,
-        "error" => tracing::Level::ERROR,
-        _ => tracing::Level::INFO,
-    };
+    let app_name = config.name.as_str();
+    let app_log_level = config.log_level.as_str();
+    let app_logging_directive = format!("{app_name}={app_log_level}").parse()?;
+    let max_level = EnvFilter::from_default_env().add_directive(app_logging_directive);
 
     tracing_subscriber::fmt()
-        .with_max_level(log_level)
+        .with_env_filter(max_level)
         .with_span_events(tracing_subscriber::fmt::format::FmtSpan::CLOSE)
         .init();
 
     tracing::info!("Starting the Ubuntu App Rating Service");
-
     app::run(config).await?;
 
     Ok(())