Quorum: Add ws and other metrics

apps/quorum/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "quorum"
-version = "0.2.0"
+version = "0.3.0"
 edition = "2021"
 
 [dependencies]
@@ -24,3 +24,4 @@ serde_json = "1.0.140"
 futures = "0.3.31"
 serde_wormhole = "0.1.0"
 axum-prometheus = "0.8.0"
+metrics = "0.24.2"

apps/quorum/src/api.rs

@@ -11,7 +11,10 @@ use secp256k1::{
 use serde::Deserialize;
 use serde_wormhole::RawMessage;
 use sha3::{Digest, Keccak256};
-use std::{net::SocketAddr, time::Duration};
+use std::{
+    net::SocketAddr,
+    time::{Duration, Instant},
+};
 use wormhole_sdk::{
     vaa::{Body, Header, Signature},
     GuardianAddress, GuardianSetInfo, Vaa,
@@ -139,6 +142,11 @@ async fn handle_observation(
         state.guardian_set.clone(),
         state.observation_lifetime,
     )?;
+    metrics::counter!(
+        "verified_observations_total",
+        &[("gaurdian_index", verifier_index.to_string())]
+    )
+    .increment(1);
     let new_signature = Signature {
         signature: params.signature,
         index: verifier_index.try_into()?,
@@ -169,6 +177,7 @@ async fn handle_observation(
             body,
         )
             .into();
+        metrics::counter!("new_vaa_total").increment(1);
         if let Err(e) = state
             .ws
             .broadcast_sender
@@ -193,9 +202,14 @@ async fn post_observation(
     tokio::spawn({
         let state = state.clone();
         async move {
+            let start = Instant::now();
+            let mut status = "success";
             if let Err(e) = handle_observation(state, params).await {
+                status = "error";
                 tracing::warn!(error = ?e, "Failed to handle observation");
             }
+            metrics::histogram!("handle_observation_duration_seconds", &[("status", status)])
+                .record(start.elapsed().as_secs_f64());
         }
     });
     Json(())
@@ -580,7 +594,9 @@ mod test {
                 let update = subscriber
                     .try_recv()
                     .expect("Failed to receive update from subscriber");
-                let UpdateEvent::NewVaa(vaa) = update;
+                let UpdateEvent::NewVaa(vaa) = update else {
+                    panic!("Expected NewVaa event, got {:?}", update);
+                };
                 let vaa: Vaa<&RawMessage> =
                     serde_wormhole::from_slice(&vaa).expect("Failed to deserialize VAA");
                 // Check if the vaa signatures are sorted

apps/quorum/src/metrics_server.rs

@@ -1,3 +1,5 @@
+use std::{future::Future, time::Duration};
+
 use axum::{routing::get, Router};
 use axum_prometheus::{
     metrics_exporter_prometheus::{PrometheusBuilder, PrometheusHandle},
@@ -18,6 +20,27 @@ pub fn setup_metrics_recorder() -> anyhow::Result<PrometheusHandle> {
         .map_err(|err| anyhow::anyhow!("Failed to set up metrics recorder: {:?}", err))
 }
 
+const METRIC_COLLECTION_INTERVAL: Duration = Duration::from_secs(1);
+pub async fn metric_collector<F, Fut>(service_name: String, update_metrics: F)
+where
+    F: Fn() -> Fut,
+    Fut: Future<Output = ()> + Send + 'static,
+{
+    let mut metric_interval = tokio::time::interval(METRIC_COLLECTION_INTERVAL);
+    loop {
+        tokio::select! {
+            _ = metric_interval.tick() => {
+                update_metrics().await;
+            }
+            _ = wait_for_exit() => {
+                tracing::info!("Received exit signal, stopping metric collector for {}...", service_name);
+                break;
+            }
+        }
+    }
+    tracing::info!("Shutting down metric collector for {}...", service_name);
+}
+
 pub async fn run(run_options: RunOptions, state: State) -> anyhow::Result<()> {
     tracing::info!("Starting Metrics Server...");
 

apps/quorum/src/server.rs

@@ -14,7 +14,7 @@ use wormhole_sdk::{vaa::Signature, GuardianSetInfo};
 
 use crate::{
     api::{self},
-    metrics_server::{self, setup_metrics_recorder},
+    metrics_server::{self, metric_collector, setup_metrics_recorder},
     pythnet::fetch_guardian_set,
     ws::WsState,
 };
@@ -181,6 +181,15 @@ pub async fn run(run_options: RunOptions) -> anyhow::Result<()> {
             run_options.clone(),
             state.clone()
         )),
+        metric_collector("state".to_string(), || {
+            let state = state.clone();
+            async move {
+                let verification = state.verification.read().await;
+                metrics::gauge!("pending_vaas").set(verification.len() as f64);
+                metrics::gauge!("pending_verified_observations")
+                    .set(verification.values().flatten().count() as f64);
+            }
+        }),
     );
 
     Ok(())

apps/quorum/src/ws.rs

@@ -54,6 +54,7 @@ async fn websocket_handler(state: axum::extract::State<State>, stream: WebSocket
 #[derive(Clone, PartialEq, Debug)]
 pub enum UpdateEvent {
     NewVaa(Vec<u8>),
+    Ping,
 }
 
 pub type SubscriberId = usize;
@@ -117,8 +118,7 @@ impl Subscriber {
                     return Err(anyhow!("Subscriber did not respond to ping. Closing connection."));
                 }
                 self.responded_to_ping = false;
-                self.sender.send(Message::Ping(vec![].into())).await?;
-                Ok(())
+                self.handle_update(UpdateEvent::Ping).await
             },
             _ = wait_for_exit() => {
                 self.sender.close().await?;
@@ -134,13 +134,35 @@ impl Subscriber {
     }
 
     async fn handle_update(&mut self, event: UpdateEvent) -> Result<()> {
-        match event.clone() {
-            UpdateEvent::NewVaa(vaa) => self.handle_new_vaa(vaa).await,
-        }
+        let start = std::time::Instant::now();
+        let update_name;
+        let result = match event.clone() {
+            UpdateEvent::NewVaa(vaa) => {
+                update_name = "new_vaa";
+                self.handle_new_vaa(vaa).await
+            }
+            UpdateEvent::Ping => {
+                update_name = "ping";
+                self.sender.send(Message::Ping(vec![].into())).await?;
+                Ok(())
+            }
+        };
+        let status = match &result {
+            Ok(_) => "success",
+            Err(_) => "error",
+        };
+        let label = [("status", status), ("name", update_name)];
+        metrics::counter!("ws_server_update_total", &label).increment(1);
+        metrics::histogram!("ws_server_update_duration_seconds", &label,)
+            .record(start.elapsed().as_secs_f64());
+        result
     }
 
     async fn handle_client_message(&mut self, message: Message) -> Result<()> {
-        match message {
+        let start = std::time::Instant::now();
+        let message_type;
+
+        let result: anyhow::Result<()> = match message {
             Message::Close(_) => {
                 // Closing the connection. We don't remove it from the subscribers
                 // list, instead when the Subscriber struct is dropped the channel
@@ -149,15 +171,39 @@ impl Subscriber {
                 // Send the close message to gracefully shut down the connection
                 // Otherwise the client might get an abnormal Websocket closure
                 // error.
+                message_type = "close";
                 self.sender.close().await?;
                 self.closed = true;
-                return Ok(());
+                Ok(())
+            }
+            Message::Text(_) => {
+                message_type = "text";
+                Ok(())
+            }
+            Message::Binary(_) => {
+                message_type = "binary";
+                Ok(())
+            }
+            Message::Ping(_) => {
+                message_type = "ping";
+                Ok(())
+            }
+            Message::Pong(_) => {
+                message_type = "pong";
+                self.responded_to_ping = true;
+                Ok(())
             }
-            Message::Text(_) => {}
-            Message::Binary(_) => {}
-            Message::Ping(_) => {}
-            Message::Pong(_) => self.responded_to_ping = true,
         };
-        Ok(())
+
+        let status = match &result {
+            Ok(_) => "success",
+            Err(_) => "error",
+        };
+        let label = [("status", status), ("message_type", message_type)];
+        metrics::counter!("ws_client_message_total", &label).increment(1);
+        metrics::histogram!("ws_client_message_duration_seconds", &label,)
+            .record(start.elapsed().as_secs_f64());
+
+        result
     }
 }