improve libp2p connected peer metrics

beacon_node/http_api/src/lib.rs

@@ -68,7 +68,7 @@ use std::path::PathBuf;
 use std::pin::Pin;
 use std::sync::Arc;
 use sysinfo::{System, SystemExt};
-use system_health::observe_system_health_bn;
+use system_health::{observe_nat, observe_system_health_bn};
 use task_spawner::{Priority, TaskSpawner};
 use tokio::sync::{
     mpsc::{Sender, UnboundedSender},
@@ -3965,13 +3965,7 @@ pub fn serve<T: BeaconChainTypes>(
         .and(warp::path::end())
         .then(|task_spawner: TaskSpawner<T::EthSpec>| {
             task_spawner.blocking_json_task(Priority::P1, move || {
-                Ok(api_types::GenericResponse::from(
-                    lighthouse_network::metrics::NAT_OPEN
-                        .as_ref()
-                        .map(|v| v.get())
-                        .unwrap_or(0)
-                        != 0,
-                ))
+                Ok(api_types::GenericResponse::from(observe_nat()))
             })
         });
 

beacon_node/lighthouse_network/src/discovery/mod.rs

@@ -1004,7 +1004,10 @@ impl<TSpec: EthSpec> NetworkBehaviour for Discovery<TSpec> {
                         discv5::Event::SocketUpdated(socket_addr) => {
                             info!(self.log, "Address updated"; "ip" => %socket_addr.ip(), "udp_port" => %socket_addr.port());
                             metrics::inc_counter(&metrics::ADDRESS_UPDATE_COUNT);
-                            metrics::check_nat();
+                            // We have SOCKET_UPDATED messages. This occurs when discovery has a majority of
+                            // users reporting an external port and our ENR gets updated.
+                            // Which means we are able to do NAT traversal.
+                            metrics::set_gauge_vec(&metrics::NAT_OPEN, &["discv5"], 1);
                             // Discv5 will have updated our local ENR. We save the updated version
                             // to disk.
 

beacon_node/lighthouse_network/src/metrics.rs

@@ -1,9 +1,10 @@
 pub use lighthouse_metrics::*;
 
 lazy_static! {
-    pub static ref NAT_OPEN: Result<IntCounter> = try_create_int_counter(
+    pub static ref NAT_OPEN: Result<IntGaugeVec> = try_create_int_gauge_vec(
         "nat_open",
-        "An estimate indicating if the local node is exposed to the internet."
+        "An estimate indicating if the local node is reachable from external nodes",
+        &["protocol"]
     );
     pub static ref ADDRESS_UPDATE_COUNT: Result<IntCounter> = try_create_int_counter(
         "libp2p_address_update_total",
@@ -14,6 +15,9 @@ lazy_static! {
         "Count of libp2p peers currently connected"
     );
 
+    pub static ref PEERS_CONNECTED_MULTI: Result<IntGaugeVec> =
+    try_create_int_gauge_vec("libp2p_peers_multi", "Count of libp2p peers currently connected", &["direction", "transport"]);
+
     pub static ref TCP_PEERS_CONNECTED: Result<IntGauge> = try_create_int_gauge(
         "libp2p_tcp_peers",
         "Count of libp2p peers currently connected via TCP"
@@ -32,13 +36,10 @@ lazy_static! {
         "libp2p_peer_disconnect_event_total",
         "Count of libp2p peer disconnect events"
     );
-    pub static ref DISCOVERY_SENT_BYTES: Result<IntGauge> = try_create_int_gauge(
-        "discovery_sent_bytes",
-        "The number of bytes sent in discovery"
-    );
-    pub static ref DISCOVERY_RECV_BYTES: Result<IntGauge> = try_create_int_gauge(
-        "discovery_recv_bytes",
-        "The number of bytes received in discovery"
+    pub static ref DISCOVERY_BYTES: Result<IntGaugeVec> = try_create_int_gauge_vec(
+        "discovery_bytes",
+        "The number of bytes sent and received in discovery",
+        &["direction"]
     );
     pub static ref DISCOVERY_QUEUE: Result<IntGauge> = try_create_int_gauge(
         "discovery_queue_size",
@@ -135,17 +136,6 @@ lazy_static! {
             &["type"]
         );
 
-    /*
-     * Inbound/Outbound peers
-     */
-    /// The number of peers that dialed us.
-    pub static ref NETWORK_INBOUND_PEERS: Result<IntGauge> =
-        try_create_int_gauge("network_inbound_peers","The number of peers that are currently connected that have dialed us.");
-
-    /// The number of peers that we dialed us.
-    pub static ref NETWORK_OUTBOUND_PEERS: Result<IntGauge> =
-        try_create_int_gauge("network_outbound_peers","The number of peers that are currently connected that we dialed.");
-
     /*
      * Peer Reporting
      */
@@ -156,31 +146,11 @@ lazy_static! {
     );
 }
 
-/// Checks if we consider the NAT open.
-///
-/// Conditions for an open NAT:
-/// 1. We have 1 or more SOCKET_UPDATED messages. This occurs when discovery has a majority of
-///    users reporting an external port and our ENR gets updated.
-/// 2. We have 0 SOCKET_UPDATED messages (can be true if the port was correct on boot), then we
-///    rely on whether we have any inbound messages. If we have no socket update messages, but
-///    manage to get at least one inbound peer, we are exposed correctly.
-pub fn check_nat() {
-    // NAT is already deemed open.
-    if NAT_OPEN.as_ref().map(|v| v.get()).unwrap_or(0) != 0 {
-        return;
-    }
-    if ADDRESS_UPDATE_COUNT.as_ref().map(|v| v.get()).unwrap_or(0) != 0
-        || NETWORK_INBOUND_PEERS.as_ref().map(|v| v.get()).unwrap_or(0) != 0_i64
-    {
-        inc_counter(&NAT_OPEN);
-    }
-}
-
 pub fn scrape_discovery_metrics() {
     let metrics =
         discv5::metrics::Metrics::from(discv5::Discv5::<discv5::DefaultProtocolId>::raw_metrics());
     set_float_gauge(&DISCOVERY_REQS, metrics.unsolicited_requests_per_second);
     set_gauge(&DISCOVERY_SESSIONS, metrics.active_sessions as i64);
-    set_gauge(&DISCOVERY_SENT_BYTES, metrics.bytes_sent as i64);
-    set_gauge(&DISCOVERY_RECV_BYTES, metrics.bytes_recv as i64);
+    set_gauge_vec(&DISCOVERY_BYTES, &["inbound"], metrics.bytes_recv as i64);
+    set_gauge_vec(&DISCOVERY_BYTES, &["outbound"], metrics.bytes_sent as i64);
 }

beacon_node/lighthouse_network/src/peer_manager/mod.rs

@@ -10,15 +10,14 @@ use delay_map::HashSetDelay;
 use discv5::Enr;
 use libp2p::identify::Info as IdentifyInfo;
 use lru_cache::LRUTimeCache;
-use peerdb::{client::ClientKind, BanOperation, BanResult, ScoreUpdateResult};
+use peerdb::{BanOperation, BanResult, ScoreUpdateResult};
 use rand::seq::SliceRandom;
 use slog::{debug, error, trace, warn};
 use smallvec::SmallVec;
 use std::{
     sync::Arc,
     time::{Duration, Instant},
 };
-use strum::IntoEnumIterator;
 use types::{EthSpec, SyncSubnetId};
 
 pub use libp2p::core::Multiaddr;
@@ -719,46 +718,6 @@ impl<TSpec: EthSpec> PeerManager<TSpec> {
         }
     }
 
-    // This function updates metrics for all connected peers.
-    fn update_connected_peer_metrics(&self) {
-        // Do nothing if we don't have metrics enabled.
-        if !self.metrics_enabled {
-            return;
-        }
-
-        let mut connected_peer_count = 0;
-        let mut inbound_connected_peers = 0;
-        let mut outbound_connected_peers = 0;
-        let mut clients_per_peer = HashMap::new();
-
-        for (_peer, peer_info) in self.network_globals.peers.read().connected_peers() {
-            connected_peer_count += 1;
-            if let PeerConnectionStatus::Connected { n_in, .. } = peer_info.connection_status() {
-                if *n_in > 0 {
-                    inbound_connected_peers += 1;
-                } else {
-                    outbound_connected_peers += 1;
-                }
-            }
-            *clients_per_peer
-                .entry(peer_info.client().kind.to_string())
-                .or_default() += 1;
-        }
-
-        metrics::set_gauge(&metrics::PEERS_CONNECTED, connected_peer_count);
-        metrics::set_gauge(&metrics::NETWORK_INBOUND_PEERS, inbound_connected_peers);
-        metrics::set_gauge(&metrics::NETWORK_OUTBOUND_PEERS, outbound_connected_peers);
-
-        for client_kind in ClientKind::iter() {
-            let value = clients_per_peer.get(&client_kind.to_string()).unwrap_or(&0);
-            metrics::set_gauge_vec(
-                &metrics::PEERS_PER_CLIENT,
-                &[client_kind.as_ref()],
-                *value as i64,
-            );
-        }
-    }
-
     /* Internal functions */
 
     /// Sets a peer as connected as long as their reputation allows it

beacon_node/lighthouse_network/src/peer_manager/network_behaviour.rs

@@ -154,8 +154,8 @@ impl<TSpec: EthSpec> NetworkBehaviour for PeerManager<TSpec> {
                 self.on_dial_failure(peer_id);
             }
             FromSwarm::ExternalAddrConfirmed(_) => {
-                // TODO: we likely want to check this against our assumed external tcp
-                // address
+                // We have an external address confirmed, means we are able to do NAT traversal.
+                metrics::set_gauge_vec(&metrics::NAT_OPEN, &["libp2p"], 1);
             }
             _ => {
                 // NOTE: FromSwarm is a non exhaustive enum so updates should be based on release
@@ -243,33 +243,34 @@ impl<TSpec: EthSpec> PeerManager<TSpec> {
             self.events.push(PeerManagerEvent::MetaData(peer_id));
         }
 
-        // Check NAT if metrics are enabled
-        if self.network_globals.local_enr.read().udp4().is_some() {
-            metrics::check_nat();
-        }
-
         // increment prometheus metrics
         if self.metrics_enabled {
             let remote_addr = endpoint.get_remote_address();
+            let direction = if endpoint.is_dialer() {
+                "outbound"
+            } else {
+                "inbound"
+            };
+
             match remote_addr.iter().find(|proto| {
                 matches!(
                     proto,
                     multiaddr::Protocol::QuicV1 | multiaddr::Protocol::Tcp(_)
                 )
             }) {
                 Some(multiaddr::Protocol::QuicV1) => {
-                    metrics::inc_gauge(&metrics::QUIC_PEERS_CONNECTED);
+                    metrics::inc_gauge_vec(&metrics::PEERS_CONNECTED_MULTI, &[direction, "quic"]);
                 }
                 Some(multiaddr::Protocol::Tcp(_)) => {
-                    metrics::inc_gauge(&metrics::TCP_PEERS_CONNECTED);
+                    metrics::inc_gauge_vec(&metrics::PEERS_CONNECTED_MULTI, &[direction, "tcp"]);
                 }
                 Some(_) => unreachable!(),
                 None => {
                     error!(self.log, "Connection established via unknown transport"; "addr" => %remote_addr)
                 }
             };
 
-            self.update_connected_peer_metrics();
+            metrics::inc_gauge(&metrics::PEERS_CONNECTED);
             metrics::inc_counter(&metrics::PEER_CONNECT_EVENT_COUNT);
         }
 
@@ -339,22 +340,29 @@ impl<TSpec: EthSpec> PeerManager<TSpec> {
         let remote_addr = endpoint.get_remote_address();
         // Update the prometheus metrics
         if self.metrics_enabled {
+            let direction = if endpoint.is_dialer() {
+                "outbound"
+            } else {
+                "inbound"
+            };
+
             match remote_addr.iter().find(|proto| {
                 matches!(
                     proto,
                     multiaddr::Protocol::QuicV1 | multiaddr::Protocol::Tcp(_)
                 )
             }) {
                 Some(multiaddr::Protocol::QuicV1) => {
-                    metrics::dec_gauge(&metrics::QUIC_PEERS_CONNECTED);
+                    metrics::dec_gauge_vec(&metrics::PEERS_CONNECTED_MULTI, &[direction, "quic"]);
                 }
                 Some(multiaddr::Protocol::Tcp(_)) => {
-                    metrics::dec_gauge(&metrics::TCP_PEERS_CONNECTED);
+                    metrics::dec_gauge_vec(&metrics::PEERS_CONNECTED_MULTI, &[direction, "tcp"]);
                 }
                 // If it's an unknown protocol we already logged when connection was established.
                 _ => {}
             };
-            self.update_connected_peer_metrics();
+            // Legacy standard metrics.
+            metrics::dec_gauge(&metrics::PEERS_CONNECTED);
             metrics::inc_counter(&metrics::PEER_DISCONNECT_EVENT_COUNT);
         }
     }

common/system_health/src/lib.rs

@@ -198,6 +198,25 @@ pub fn observe_system_health_vc(
     }
 }
 
+/// Observes if NAT traversal is possible.
+pub fn observe_nat() -> bool {
+    let discv5_nat = lighthouse_network::metrics::get_int_gauge(
+        &lighthouse_network::metrics::NAT_OPEN,
+        &["discv5"],
+    )
+    .map(|g| g.get() == 1)
+    .unwrap_or_default();
+
+    let libp2p_nat = lighthouse_network::metrics::get_int_gauge(
+        &lighthouse_network::metrics::NAT_OPEN,
+        &["libp2p"],
+    )
+    .map(|g| g.get() == 1)
+    .unwrap_or_default();
+
+    discv5_nat && libp2p_nat
+}
+
 /// Observes the Beacon Node system health.
 pub fn observe_system_health_bn<TSpec: EthSpec>(
     sysinfo: Arc<RwLock<System>>,
@@ -223,11 +242,7 @@ pub fn observe_system_health_bn<TSpec: EthSpec>(
         .unwrap_or_else(|| (String::from("None"), 0, 0));
 
     // Determine if the NAT is open or not.
-    let nat_open = lighthouse_network::metrics::NAT_OPEN
-        .as_ref()
-        .map(|v| v.get())
-        .unwrap_or(0)
-        != 0;
+    let nat_open = observe_nat();
 
     SystemHealthBN {
         system_health,