add peer clock skew warning

1 files changed, 22 insertions, 0 deletions

diff --git a/src/api/stats/prometheus.rs b/src/api/stats/prometheus.rs
index 2f33bef..6774e74 100644
--- a/src/api/stats/prometheus.rs
+++ b/src/api/stats/prometheus.rs
@@ -763,6 +763,28 @@ pub(super) fn render(stats: &StatsResponse, list: &PeerListResponse) -> String {
         propagation.ahead as f64,
     );
 
+    let clock = &stats.clock;
+    out.single(
+        "clock_peers_compared",
+        "gauge",
+        "Active peers whose clocks were compared with ours (from their PONGs).",
+        clock.peers as f64,
+    );
+    if let Some(offset_ms) = clock.offset_ms {
+        out.single(
+            "clock_offset_seconds",
+            "gauge",
+            "How far this node's clock is ahead of its peers' (behind: negative), the median.",
+            offset_ms as f64 / 1000.0,
+        );
+    }
+    out.single(
+        "clock_off",
+        "gauge",
+        "1 while this node's clock differs from most of its peers' by more than --clock-skew-warn.",
+        flag(clock.off),
+    );
+
     // Node totals, including peers no longer listed.
     let totals = traffic_series(&stats.traffic);
     out.family(