Merge pull request #758 from mammuthus/feature/metrics-bad-class-export-dashboard

Add class-based error metrics and dashboard panels

README.md

@@ -1,6 +1,6 @@
 # Telemt - MTProxy on Rust + Tokio
 
-[![Latest Release](https://img.shields.io/github/v/release/telemt/telemt?color=neon)](https://github.com/telemt/telemt/releases/latest) [![Stars](https://img.shields.io/github/stars/telemt/telemt?style=social)](https://github.com/telemt/telemt/stargazers) [![Forks](https://img.shields.io/github/forks/telemt/telemt?style=social)](https://github.com/telemt/telemt/network/members) [![Telegram](https://img.shields.io/badge/Telegram-Chat-24a1de?logo=telegram&logoColor=24a1de)](https://t.me/telemtrs)
+[![Latest Release](https://img.shields.io/github/v/release/telemt/telemt?color=neon)](https://github.com/telemt/telemt/releases/latest) [![Stars](https://img.shields.io/github/stars/telemt/telemt?style=social)](https://github.com/telemt/telemt/stargazers) [![Forks](https://img.shields.io/github/forks/telemt/telemt?style=social)](https://github.com/telemt/telemt/network/members)
 
 [🇷🇺 README на русском](https://github.com/telemt/telemt/blob/main/README.ru.md)
 
@@ -14,7 +14,7 @@
 
 <p align="center">
   <a href="https://t.me/telemtrs">
-    <img src="/docs/assets/telegram_button.svg" width="150"/>
+    <img src="https://github.com/user-attachments/assets/30b7e7b9-974a-4e3d-aab6-b58a85de4507" width="240"/>
   </a>
 </p>
 

src/metrics.rs

@@ -454,6 +454,21 @@ async fn render_metrics(
         }
     );
 
+    let _ = writeln!(
+        out,
+        "# HELP telemt_connections_bad_by_class_total Bad/rejected connections by class"
+    );
+    let _ = writeln!(out, "# TYPE telemt_connections_bad_by_class_total counter");
+    if core_enabled {
+        for (class, total) in stats.get_connects_bad_class_counts() {
+            let _ = writeln!(
+                out,
+                "telemt_connections_bad_by_class_total{{class=\"{}\"}} {}",
+                class, total
+            );
+        }
+    }
+
     let _ = writeln!(
         out,
         "# HELP telemt_handshake_timeouts_total Handshake timeouts"
@@ -469,6 +484,24 @@ async fn render_metrics(
         }
     );
 
+    let _ = writeln!(
+        out,
+        "# HELP telemt_handshake_failures_by_class_total Handshake failures by class"
+    );
+    let _ = writeln!(
+        out,
+        "# TYPE telemt_handshake_failures_by_class_total counter"
+    );
+    if core_enabled {
+        for (class, total) in stats.get_handshake_failure_class_counts() {
+            let _ = writeln!(
+                out,
+                "telemt_handshake_failures_by_class_total{{class=\"{}\"}} {}",
+                class, total
+            );
+        }
+    }
+
     let _ = writeln!(
         out,
         "# HELP telemt_auth_expensive_checks_total Expensive authentication candidate checks executed during handshake validation"
@@ -3342,8 +3375,9 @@ mod tests {
 
         stats.increment_connects_all();
         stats.increment_connects_all();
-        stats.increment_connects_bad();
+        stats.increment_connects_bad_with_class("tls_handshake_bad_client");
         stats.increment_handshake_timeouts();
+        stats.increment_handshake_failure_class("timeout");
         shared_state
             .handshake
             .auth_expensive_checks_total
@@ -3403,7 +3437,10 @@ mod tests {
         )));
         assert!(output.contains("telemt_connections_total 2"));
         assert!(output.contains("telemt_connections_bad_total 1"));
+        assert!(output
+            .contains("telemt_connections_bad_by_class_total{class=\"tls_handshake_bad_client\"} 1"));
         assert!(output.contains("telemt_handshake_timeouts_total 1"));
+        assert!(output.contains("telemt_handshake_failures_by_class_total{class=\"timeout\"} 1"));
         assert!(output.contains("telemt_auth_expensive_checks_total 9"));
         assert!(output.contains("telemt_auth_budget_exhausted_total 2"));
         assert!(output.contains("telemt_upstream_connect_attempt_total 2"));
@@ -3503,7 +3540,9 @@ mod tests {
         assert!(output.contains("# TYPE telemt_uptime_seconds gauge"));
         assert!(output.contains("# TYPE telemt_connections_total counter"));
         assert!(output.contains("# TYPE telemt_connections_bad_total counter"));
+        assert!(output.contains("# TYPE telemt_connections_bad_by_class_total counter"));
         assert!(output.contains("# TYPE telemt_handshake_timeouts_total counter"));
+        assert!(output.contains("# TYPE telemt_handshake_failures_by_class_total counter"));
         assert!(output.contains("# TYPE telemt_auth_expensive_checks_total counter"));
         assert!(output.contains("# TYPE telemt_auth_budget_exhausted_total counter"));
         assert!(output.contains("# TYPE telemt_upstream_connect_attempt_total counter"));