fix: improve log (#108)

* fix: improve log format

* fix: set data channel errors to warn level

* fix: make span name clearer

src/client.rs

@@ -174,13 +174,13 @@ async fn do_data_channel_handshake<T: Transport>(
                 .connector
                 .connect(&args.remote_addr)
                 .await
-                .with_context(|| "Failed to connect to remote_addr")?;
+                .with_context(|| format!("Failed to connect to {}", &args.remote_addr))?;
             T::hint(&conn, args.socket_opts);
 
             Ok(conn)
         },
         |e, duration| {
-            warn!("{:?}. Retry in {:?}", e, duration);
+            warn!("{:#}. Retry in {:?}", e, duration);
         },
     )
     .await?;
@@ -220,7 +220,7 @@ async fn run_data_channel_for_tcp<T: Transport>(
 
     let mut local = TcpStream::connect(local_addr)
         .await
-        .with_context(|| "Failed to connect to local_addr")?;
+        .with_context(|| format!("Failed to connect to {}", local_addr))?;
     let _ = copy_bidirectional(&mut conn, &mut local).await;
     Ok(())
 }
@@ -295,7 +295,7 @@ async fn run_data_channel_for_udp<T: Transport>(conn: T::Stream, local_addr: &st
                     ));
                 }
                 Err(e) => {
-                    error!("{:?}", e);
+                    error!("{:#}", e);
                 }
             }
         }
@@ -383,7 +383,7 @@ impl<T: 'static + Transport> ControlChannel<T> {
             .transport
             .connect(&self.remote_addr)
             .await
-            .with_context(|| format!("Failed to connect to the server: {}", &self.remote_addr))?;
+            .with_context(|| format!("Failed to connect to {}", &self.remote_addr))?;
         T::hint(&conn, SocketOpts::for_control_channel());
 
         // Send hello
@@ -448,7 +448,7 @@ impl<T: 'static + Transport> ControlChannel<T> {
                             let args = data_ch_args.clone();
                             tokio::spawn(async move {
                                 if let Err(e) = run_data_channel(args).await.with_context(|| "Failed to run the data channel") {
-                                    error!("{:?}", e);
+                                    warn!("{:#}", e);
                                 }
                             }.instrument(Span::current()));
                         }
@@ -466,7 +466,7 @@ impl<T: 'static + Transport> ControlChannel<T> {
 }
 
 impl ControlChannelHandle {
-    #[instrument(skip_all, fields(service = %service.name))]
+    #[instrument(name="handle", skip_all, fields(service = %service.name))]
     fn new<T: 'static + Transport>(
         service: ClientServiceConfig,
         remote_addr: String,
@@ -497,10 +497,10 @@ impl ControlChannelHandle {
                     }
 
                     if let Some(duration) = backoff.next_backoff() {
-                        error!("{:?}\n\nRetry in {:?}...", err, duration);
+                        error!("{:#}. Retry in {:?}...", err, duration);
                         time::sleep(duration).await;
                     } else {
-                        error!("{:?}. Break", err);
+                        error!("{:#}. Break", err);
                     }
                 }
             }

src/config_watcher.rs

@@ -149,7 +149,7 @@ async fn config_watcher(
                     let _ = fevent_tx.blocking_send(true);
                 }
             }
-            Err(e) => error!("watch error: {:?}", e),
+            Err(e) => error!("watch error: {:#}", e),
         })?;
 
     watcher.watch(&path, RecursiveMode::NonRecursive)?;
@@ -164,7 +164,7 @@ async fn config_watcher(
                     let new = match Config::from_file(&path).await.with_context(|| "The changed configuration is invalid. Ignored") {
                       Ok(v) => v,
                       Err(e) => {
-                        error!("{:?}", e);
+                        error!("{:#}", e);
                         // If the config is invalid, just ignore it
                         continue;
                       }

src/protocol.rs

@@ -205,7 +205,7 @@ pub async fn read_control_cmd<T: AsyncRead + AsyncWrite + Unpin>(
     let mut bytes = vec![0u8; PACKET_LEN.c_cmd];
     conn.read_exact(&mut bytes)
         .await
-        .with_context(|| "Failed to read control cmd")?;
+        .with_context(|| "Failed to read cmd")?;
     bincode::deserialize(&bytes).with_context(|| "Failed to deserialize control cmd")
 }
 
@@ -215,6 +215,6 @@ pub async fn read_data_cmd<T: AsyncRead + AsyncWrite + Unpin>(
     let mut bytes = vec![0u8; PACKET_LEN.d_cmd];
     conn.read_exact(&mut bytes)
         .await
-        .with_context(|| "Failed to read data cmd")?;
+        .with_context(|| "Failed to read cmd")?;
     bincode::deserialize(&bytes).with_context(|| "Failed to deserialize data cmd")
 }

src/server.rs

@@ -149,7 +149,7 @@ impl<'a, T: 'static + Transport> Server<'a, T> {
                                 // EMFILE. So sleep for a while and retry
                                 // TODO: Only sleep for EMFILE, ENFILE, ENOMEM, ENOBUFS
                                 if let Some(d) = backoff.next_backoff() {
-                                    error!("Failed to accept: {}. Retry in {:?}...", err, d);
+                                    error!("Failed to accept: {:#}. Retry in {:?}...", err, d);
                                     time::sleep(d).await;
                                 } else {
                                     // This branch will never be executed according to the current retry policy
@@ -172,11 +172,11 @@ impl<'a, T: 'static + Transport> Server<'a, T> {
                                             let control_channels = self.control_channels.clone();
                                             tokio::spawn(async move {
                                                 if let Err(err) = handle_connection(conn, services, control_channels).await {
-                                                    error!("{:?}", err);
+                                                    error!("{:#}", err);
                                                 }
-                                            }.instrument(info_span!("handle_connection", %addr)));
+                                            }.instrument(info_span!("connection", %addr)));
                                         }, Err(e) => {
-                                            error!("{:?}", e);
+                                            error!("{:#}", e);
                                         }
                                     }
                                 },
@@ -369,7 +369,7 @@ where
 {
     // Create a control channel handle, where the control channel handling task
     // and the connection pool task are created.
-    #[instrument(skip_all, fields(service = %service.name))]
+    #[instrument(name = "handle", skip_all, fields(service = %service.name))]
     fn new(conn: T::Stream, service: ServerServiceConfig) -> ControlChannelHandle<T> {
         // Create a shutdown channel
         let (shutdown_tx, shutdown_rx) = broadcast::channel::<bool>(1);
@@ -406,7 +406,7 @@ where
                     .await
                     .with_context(|| "Failed to run TCP connection pool")
                     {
-                        error!("{:?}", e);
+                        error!("{:#}", e);
                     }
                 }
                 .instrument(Span::current()),
@@ -422,7 +422,7 @@ where
                     .await
                     .with_context(|| "Failed to run TCP connection pool")
                     {
-                        error!("{:?}", e);
+                        error!("{:#}", e);
                     }
                 }
                 .instrument(Span::current()),
@@ -433,7 +433,6 @@ where
         let ch = ControlChannel::<T> {
             conn,
             shutdown_rx,
-            service: service.clone(),
             data_ch_req_rx,
         };
 
@@ -441,7 +440,7 @@ where
         tokio::spawn(
             async move {
                 if let Err(err) = ch.run().await {
-                    error!("{:?}", err);
+                    error!("{:#}", err);
                 }
             }
             .instrument(Span::current()),
@@ -458,14 +457,13 @@ where
 // Control channel, using T as the transport layer. P is TcpStream or UdpTraffic
 struct ControlChannel<T: Transport> {
     conn: T::Stream,                               // The connection of control channel
-    service: ServerServiceConfig,                  // A copy of the corresponding service config
     shutdown_rx: broadcast::Receiver<bool>,        // Receives the shutdown signal
     data_ch_req_rx: mpsc::UnboundedReceiver<bool>, // Receives visitor connections
 }
 
 impl<T: Transport> ControlChannel<T> {
     // Run a control channel
-    #[instrument(skip(self), fields(service = %self.service.name))]
+    #[instrument(skip_all)]
     async fn run(mut self) -> Result<()> {
         let cmd = bincode::serialize(&ControlChannelCmd::CreateDataChannel).unwrap();
 
@@ -476,11 +474,11 @@ impl<T: Transport> ControlChannel<T> {
                     match val {
                         Some(_) => {
                             if let Err(e) = self.conn.write_all(&cmd).await.with_context(||"Failed to write control cmds") {
-                                error!("{:?}", e);
+                                error!("{:#}", e);
                                 break;
                             }
                             if let Err(e) = self.conn.flush().await.with_context(|| "Failed to flush control cmds") {
-                                error!("{:?}", e);
+                                error!("{:#}", e);
                                 break;
                             }
                         }
@@ -522,7 +520,7 @@ fn tcp_listen_and_send(
         let l: TcpListener = match l {
             Ok(v) => v,
             Err(e) => {
-                error!("{:?}", e);
+                error!("{:#}", e);
                 return;
             }
         };

src/transport/mod.rs

@@ -110,7 +110,7 @@ impl SocketOpts {
             if let Err(e) = try_set_tcp_keepalive(conn, keepalive_duration, keepalive_interval)
                 .with_context(|| "Failed to set keepalive")
             {
-                error!("{:?}", e);
+                error!("{:#}", e);
             }
         }
 
@@ -120,7 +120,7 @@ impl SocketOpts {
                 .set_nodelay(nodelay)
                 .with_context(|| "Failed to set nodelay")
             {
-                error!("{:?}", e);
+                error!("{:#}", e);
             }
         }
     }