add disk I/O stats

1 files changed, 26 insertions, 0 deletions

diff --git a/src/api/stats/prometheus.rs b/src/api/stats/prometheus.rs
index f68ca85..ea97bd2 100644
--- a/src/api/stats/prometheus.rs
+++ b/src/api/stats/prometheus.rs
@@ -297,6 +297,32 @@ pub(super) async fn render(state: &AppState, stats: &StatsResponse) -> String {
         stats.stale_hello_replies as f64,
     );
 
+    let disk = &stats.disk;
+    out.single(
+        "disk_reads_total",
+        "counter",
+        "Files this node read for itself (state file, backup).",
+        disk.reads as f64,
+    );
+    out.single(
+        "disk_read_bytes_total",
+        "counter",
+        "Bytes of those files.",
+        disk.read_bytes as f64,
+    );
+    out.single(
+        "disk_writes_total",
+        "counter",
+        "Files this node wrote for itself (state file).",
+        disk.writes as f64,
+    );
+    out.single(
+        "disk_written_bytes_total",
+        "counter",
+        "Bytes of those files.",
+        disk.written_bytes as f64,
+    );
+
     let propagation = &stats.propagation;
     out.family(
         "propagation_delay_seconds",