Show health warnings and refresh automatically

docs/roadmap.md

@@ -58,9 +58,10 @@
 
 ## Этап 5 — мониторинг и терминал
 
-- [ ] swap, inode, network и выбранные systemd units;
+- [x] swap, inode, network и состояние SSH/WireGuard;
-- [ ] предупреждения по диску, памяти и недоступности;
+- [x] предупреждения по диску, памяти, inode и недоступности;
-- [ ] автоматическое обновление и короткая локальная история;
+- [x] автоматическое обновление каждые 30 секунд;
+- [ ] короткая локальная история;
 - [ ] графики и экспорт диагностики без секретов;
 - [ ] отдельный прямой SSH-терминал;
 - [ ] отдельная terminal identity и подтверждение пользователя;

src/ServerMonitorManager.Desktop/MainPage.xaml

@@ -202,6 +202,7 @@
                                         <StackPanel Grid.Column="3" VerticalAlignment="Center">
                                             <TextBlock Text="{Binding MemoryText}" />
                                             <TextBlock Foreground="{ThemeResource TextFillColorSecondaryBrush}" Text="{Binding DiskText}" />
+                                            <TextBlock Foreground="{ThemeResource TextFillColorSecondaryBrush}" Text="{Binding HealthText}" />
                                         </StackPanel>
                                         <TextBlock
                                             Grid.Column="4"

src/ServerMonitorManager.Desktop/MainPage.xaml.cs

@@ -11,12 +11,15 @@ public sealed partial class MainPage : Page
 {
     private readonly ServerStorage _storage = new();
     private readonly SshMonitorService _ssh = new();
+    private readonly DispatcherTimer _refreshTimer = new() { Interval = TimeSpan.FromSeconds(30) };
+    private readonly SemaphoreSlim _refreshLock = new(1, 1);
     private bool _loaded;
 
     public MainPage()
     {
         InitializeComponent();
         Loaded += MainPage_Loaded;
+        _refreshTimer.Tick += async (_, _) => await RefreshAllAsync();
         MainNavigation.SelectedItem = MainNavigation.MenuItems[0];
     }
 
@@ -32,6 +35,7 @@ public sealed partial class MainPage : Page
         }
 
         _loaded = true;
+        _refreshTimer.Start();
         foreach (var profile in await _storage.LoadAsync())
         {
             Servers.Add(new ServerViewModel(profile));
@@ -271,6 +275,12 @@ public sealed partial class MainPage : Page
         => await RefreshAllAsync();
 
     private async Task RefreshAllAsync()
+    {
+        if (!await _refreshLock.WaitAsync(0))
+        {
+            return;
+        }
+        try
         {
             if (Servers.Count == 0)
             {
@@ -280,20 +290,25 @@ public sealed partial class MainPage : Page
 
             await Task.WhenAll(Servers.Select(RefreshServerAsync));
             var online = Servers.Count(server => server.IsOnline);
-        var warnings = Servers.Count - online;
+            var warnings = Servers.Count(server => !server.IsOnline || server.HasWarning);
             AvailabilityValueText.Text = $"{online} / {Servers.Count}";
             AvailabilityDetailText.Text = warnings == 0 ? "Все серверы доступны" : $"Недоступно: {warnings}";
             AverageLoadValueText.Text = online == 0
                 ? "—"
                 : $"{Servers.Where(server => server.IsOnline).Average(server => server.CpuPercent):F0}%";
             WarningValueText.Text = warnings.ToString(CultureInfo.InvariantCulture);
-        WarningDetailText.Text = warnings == 0 ? "Нет предупреждений" : "Проверьте SSH и ключ";
+            WarningDetailText.Text = warnings == 0 ? "Нет предупреждений" : "Проверьте доступность и ресурсы";
             HeaderStatusText.Text = $"SSH monitoring · {Servers.Count} сервер(а) · обновлено {DateTime.Now:HH:mm:ss}";
             if (Servers.Any(server => server.IsHub))
             {
                 await RefreshMeshAsync(showSuccess: false);
             }
         }
+        finally
+        {
+            _refreshLock.Release();
+        }
+    }
 
     private async Task RefreshServerAsync(ServerViewModel server)
     {
@@ -306,6 +321,11 @@ public sealed partial class MainPage : Page
             server.CpuText = $"{metrics.CpuPercent:F0}% load";
             server.MemoryText = $"{FormatSize(metrics.MemoryUsedKb)} / {FormatSize(metrics.MemoryTotalKb)} RAM";
             server.DiskText = $"{FormatSize(metrics.DiskUsedKb)} / {FormatSize(metrics.DiskTotalKb)} disk";
+            var memoryPercent = Percent(metrics.MemoryUsedKb, metrics.MemoryTotalKb);
+            var diskPercent = Percent(metrics.DiskUsedKb, metrics.DiskTotalKb);
+            var inodePercent = Percent(metrics.InodesUsed, metrics.InodesTotal);
+            server.HasWarning = memoryPercent >= 90 || diskPercent >= 90 || inodePercent >= 90 || metrics.SshState != "active";
+            server.HealthText = $"swap {FormatSize(metrics.SwapUsedKb)}/{FormatSize(metrics.SwapTotalKb)} · inode {inodePercent:F0}% · net ↓{FormatBytes(metrics.NetworkRxBytes)} ↑{FormatBytes(metrics.NetworkTxBytes)} · SSH {metrics.SshState}";
             server.LatencyText = $"{metrics.Latency.TotalMilliseconds:F0} ms";
             server.Status = $"Онлайн · uptime {FormatUptime(metrics.Uptime)}";
             server.IsOnline = true;
@@ -319,6 +339,8 @@ public sealed partial class MainPage : Page
             server.DiskText = "—";
             server.LatencyText = "offline";
             server.IsOnline = false;
+            server.HasWarning = true;
+            server.HealthText = "Нет данных о службах и сети";
         }
     }
 
@@ -351,6 +373,14 @@ public sealed partial class MainPage : Page
             ? $"{uptime.TotalDays:F0} дн."
             : $"{uptime.TotalHours:F0} ч.";
 
+    private static double Percent(long used, long total)
+        => total <= 0 ? 0 : Math.Clamp(used * 100d / total, 0, 100);
+
+    private static string FormatBytes(long bytes)
+        => bytes >= 1024L * 1024 * 1024
+            ? $"{bytes / 1024d / 1024d / 1024d:F1} GB"
+            : $"{bytes / 1024d / 1024d:F1} MB";
+
     private static string CompactError(Exception exception)
     {
         var firstLine = exception.Message.Split(['\r', '\n'], StringSplitOptions.RemoveEmptyEntries).FirstOrDefault();

src/ServerMonitorManager.Desktop/ServerViewModel.cs

@@ -19,7 +19,9 @@ public sealed class ServerViewModel : INotifyPropertyChanged
     private string _memoryText = "—";
     private string _diskText = "—";
     private string _latencyText = "—";
+    private string _healthText = "—";
     private bool _isOnline;
+    private bool _hasWarning;
 
     public ServerViewModel(ServerProfileData profile) => Profile = profile;
 
@@ -33,7 +35,9 @@ public sealed class ServerViewModel : INotifyPropertyChanged
     public string MemoryText { get => _memoryText; set => Set(ref _memoryText, value); }
     public string DiskText { get => _diskText; set => Set(ref _diskText, value); }
     public string LatencyText { get => _latencyText; set => Set(ref _latencyText, value); }
+    public string HealthText { get => _healthText; set => Set(ref _healthText, value); }
     public bool IsOnline { get => _isOnline; set => Set(ref _isOnline, value); }
+    public bool HasWarning { get => _hasWarning; set => Set(ref _hasWarning, value); }
 
     public event PropertyChangedEventHandler? PropertyChanged;
 

src/ServerMonitorManager.Desktop/SshMonitorService.cs

@@ -12,6 +12,14 @@ public sealed record ServerMetrics(
     long MemoryTotalKb,
     long DiskUsedKb,
     long DiskTotalKb,
+    long SwapUsedKb,
+    long SwapTotalKb,
+    long InodesUsed,
+    long InodesTotal,
+    long NetworkRxBytes,
+    long NetworkTxBytes,
+    string SshState,
+    string WireGuardState,
     TimeSpan Uptime,
     TimeSpan Latency);
 
@@ -61,6 +69,10 @@ public sealed partial class SshMonitorService
         var memoryAvailable = ReadLong(values, "MEM_AVAILABLE_KB");
         var diskTotal = ReadLong(values, "DISK_TOTAL_KB");
         var diskAvailable = ReadLong(values, "DISK_AVAILABLE_KB");
+        var swapTotal = ReadLong(values, "SWAP_TOTAL_KB");
+        var swapFree = ReadLong(values, "SWAP_FREE_KB");
+        var inodesTotal = ReadLong(values, "DISK_INODES_TOTAL");
+        var inodesFree = ReadLong(values, "DISK_INODES_FREE");
 
         return new ServerMetrics(
             values.GetValueOrDefault("HOSTNAME", profile.Name),
@@ -69,6 +81,14 @@ public sealed partial class SshMonitorService
             memoryTotal,
             Math.Max(0, diskTotal - diskAvailable),
             diskTotal,
+            Math.Max(0, swapTotal - swapFree),
+            swapTotal,
+            Math.Max(0, inodesTotal - inodesFree),
+            inodesTotal,
+            ReadLong(values, "NETWORK_RX_BYTES"),
+            ReadLong(values, "NETWORK_TX_BYTES"),
+            values.GetValueOrDefault("SYSTEMD_SSH", "unknown"),
+            values.GetValueOrDefault("SYSTEMD_WIREGUARD", "unknown"),
             TimeSpan.FromSeconds(ReadLong(values, "UPTIME_SECONDS")),
             stopwatch.Elapsed);
     }