Implemented node system statistics

2026-03-21 18:21:09 +00:00
parent ba5e364c05
commit 6d447a0ff9
28 changed files with 1402 additions and 156 deletions
--- a/MoonlightServers.Daemon/Helpers/SystemMetrics.Network.cs
+++ b/MoonlightServers.Daemon/Helpers/SystemMetrics.Network.cs
@@ -0,0 +1,101 @@
+namespace MoonlightServers.Daemon.Helpers;
+
+public partial class SystemMetrics
+{
+    /// <summary>Network throughput for a single interface, computed between two samples.</summary>
+    /// <param name="Name">Interface name, e.g. <c>eth0</c>, <c>ens3</c>.</param>
+    /// <param name="RxBytesPerSec">Received bytes per second.</param>
+    /// <param name="TxBytesPerSec">Transmitted bytes per second.</param>
+    /// <param name="RxPacketsPerSec">Received packets per second.</param>
+    /// <param name="TxPacketsPerSec">Transmitted packets per second.</param>
+    /// <param name="RxErrors">Cumulative receive error count (not a rate).</param>
+    /// <param name="TxErrors">Cumulative transmit error count (not a rate).</param>
+    public record NetworkInterfaceInfo(
+        string Name,
+        long RxBytesPerSec,
+        long TxBytesPerSec,
+        long RxPacketsPerSec,
+        long TxPacketsPerSec,
+        long RxErrors,
+        long TxErrors
+    );
+
+    // Network
+    private record RawNetLine(
+        string Iface,
+        long RxBytes,
+        long RxPackets,
+        long RxErrors,
+        long TxBytes,
+        long TxPackets,
+        long TxErrors
+    );
+
+    private static async Task<List<RawNetLine>> ReadRawNetStatsAsync()
+    {
+        var lines = await File.ReadAllLinesAsync("/proc/net/dev");
+        var result = new List<RawNetLine>();
+
+        // The first two lines are the column-header banner.
+        foreach (var line in lines.Skip(2))
+        {
+            var colon = line.IndexOf(':');
+            if (colon < 0)
+                continue;
+
+            var iface = line[..colon].Trim();
+
+            // Skip loopback and ephemeral veth pairs created by container runtimes.
+            if (iface == "lo" || iface.StartsWith("veth", StringComparison.Ordinal))
+                continue;
+
+            var f = line[(colon + 1)..].Split(' ', StringSplitOptions.RemoveEmptyEntries);
+            if (f.Length < 16)
+                continue;
+
+            // Column layout (after the colon, 0-based):
+            // RX: [0]bytes [1]packets [2]errs [3]drop [4]fifo [5]frame [6]compressed [7]multicast
+            // TX: [8]bytes [9]packets [10]errs [11]drop [12]fifo [13]colls [14]carrier [15]compressed
+            result.Add(new RawNetLine(
+                Iface: iface,
+                RxBytes: long.Parse(f[0]),
+                RxPackets: long.Parse(f[1]),
+                RxErrors: long.Parse(f[2]),
+                TxBytes: long.Parse(f[8]),
+                TxPackets: long.Parse(f[9]),
+                TxErrors: long.Parse(f[10])
+            ));
+        }
+
+        return result;
+    }
+
+    private static IReadOnlyList<NetworkInterfaceInfo> ComputeNetworkRates(
+        List<RawNetLine> s1,
+        List<RawNetLine> s2,
+        double intervalSecs
+    )
+    {
+        var prev = s1.ToDictionary(x => x.Iface);
+        var result = new List<NetworkInterfaceInfo>();
+        var div = intervalSecs > 0 ? intervalSecs : 1.0;
+
+        foreach (var cur in s2)
+        {
+            if (!prev.TryGetValue(cur.Iface, out var p))
+                continue;
+
+            result.Add(new NetworkInterfaceInfo(
+                Name: cur.Iface,
+                RxBytesPerSec: (long)((cur.RxBytes - p.RxBytes) / div),
+                TxBytesPerSec: (long)((cur.TxBytes - p.TxBytes) / div),
+                RxPacketsPerSec: (long)((cur.RxPackets - p.RxPackets) / div),
+                TxPacketsPerSec: (long)((cur.TxPackets - p.TxPackets) / div),
+                RxErrors: cur.RxErrors,
+                TxErrors: cur.TxErrors
+            ));
+        }
+
+        return result;
+    }
+}