add prometheus

MareSynchronosServer/MareSynchronosServer/FileCleanupService.cs

@@ -1,11 +1,9 @@
 using System;
-using System.Data;
 using System.IO;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using MareSynchronosServer.Data;
-using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
@@ -52,17 +50,18 @@ namespace MareSynchronosServer
 
                 var prevTime = DateTime.Now.Subtract(TimeSpan.FromDays(filesOlderThanDays));
 
-                dbContext.Database.BeginTransaction(IsolationLevel.Snapshot);
+                var allFiles = dbContext.Files.Where(f => f.Uploaded).ToList();
-                var allFiles = dbContext.Files.Where(f => f.Uploaded);
                 foreach (var file in allFiles)
                 {
                     var fileName = Path.Combine(_configuration["CacheDirectory"], file.Hash);
-                    if (!File.Exists(fileName))
+                    var fi = new FileInfo(fileName);
+                    if (!fi.Exists)
                     {
                         _logger.LogInformation("File does not exist anymore: " + fileName);
                         dbContext.Files.Remove(file);
-                    } else if (new FileInfo(fileName).LastAccessTime < prevTime)
+                    } else if (fi.LastAccessTime < prevTime)
                     {
+                        MareMetrics.FilesTotalSize.Dec(fi.Length);
                         _logger.LogInformation("File outdated: " + fileName);
                         dbContext.Files.Remove(file);
                         File.Delete(fileName);
@@ -72,7 +71,6 @@ namespace MareSynchronosServer
                 _logger.LogInformation($"Cleanup complete");
 
                 dbContext.SaveChanges();
-                dbContext.Database.CommitTransaction();
             }
             catch
             {

MareSynchronosServer/MareSynchronosServer/Hubs/MareHub.Files.cs

@@ -40,7 +40,13 @@ namespace MareSynchronosServer.Hubs
             var ownFiles = await _dbContext.Files.Where(f => f.Uploaded && f.Uploader.UID == AuthenticatedUserId).ToListAsync();
             foreach (var file in ownFiles)
             {
-                File.Delete(Path.Combine(BasePath, file.Hash));
+                var fi = new FileInfo(Path.Combine(BasePath, file.Hash));
+                if (fi.Exists)
+                {
+                    MareMetrics.FilesTotalSize.Dec(fi.Length);
+                    MareMetrics.FilesTotal.Dec();
+                    fi.Delete();
+                }
             }
             _dbContext.Files.RemoveRange(ownFiles);
             await _dbContext.SaveChangesAsync();
@@ -59,7 +65,8 @@ namespace MareSynchronosServer.Hubs
             int readByteCount;
             var buffer = new byte[chunkSize];
 
-            await using var fs = File.Open(Path.Combine(BasePath, hash), FileMode.Open, FileAccess.Read, FileShare.Read);
+            var path = Path.Combine(BasePath, hash);
+            await using var fs = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.Read);
             while ((readByteCount = await fs.ReadAsync(buffer, 0, chunkSize, ct)) > 0)
             {
                 await Task.Delay(10, ct);
@@ -67,6 +74,9 @@ namespace MareSynchronosServer.Hubs
             }
 
             _logger.LogInformation("User " + AuthenticatedUserId + " finished downloading file: " + hash);
+
+            MareMetrics.UserDownloadedFiles.Inc();
+            MareMetrics.UserDownloadedFilesSize.Inc(new FileInfo(path).Length);
         }
 
         [Authorize(AuthenticationSchemes = SecretKeyAuthenticationHandler.AuthScheme)]
@@ -204,6 +214,10 @@ namespace MareSynchronosServer.Hubs
                 await File.WriteAllBytesAsync(Path.Combine(BasePath, hash), uploadedFile.ToArray());
                 relatedFile = _dbContext.Files.Single(f => f.Hash == hash);
                 relatedFile.Uploaded = true;
+
+                MareMetrics.FilesTotal.Inc();
+                MareMetrics.FilesTotalSize.Inc(uploadedFile.Count);
+
                 await _dbContext.SaveChangesAsync();
                 _logger.LogInformation("File " + hash + " added to DB");
             }

MareSynchronosServer/MareSynchronosServer/Hubs/MareHub.User.cs

@@ -24,10 +24,15 @@ namespace MareSynchronosServer.Hubs
 
             string userid = AuthenticatedUserId;
             var userEntry = await _dbContext.Users.SingleAsync(u => u.UID == userid);
-            var ownPairData = _dbContext.ClientPairs.Where(u => u.User.UID == userid);
+            var ownPairData = await _dbContext.ClientPairs.Where(u => u.User.UID == userid).ToListAsync();
+
+            MareMetrics.Pairs.Dec(ownPairData.Count);
+            MareMetrics.PairsPaused.Dec(ownPairData.Count(c => c.IsPaused));
+
             _dbContext.RemoveRange(ownPairData);
             await _dbContext.SaveChangesAsync();
-            var otherPairData = _dbContext.ClientPairs.Include(u => u.User).Where(u => u.OtherUser.UID == userid);
+            var otherPairData = await _dbContext.ClientPairs.Include(u => u.User)
+                .Where(u => u.OtherUser.UID == userid).ToListAsync();
             foreach (var pair in otherPairData)
             {
                 await Clients.User(pair.User.UID)
@@ -38,6 +43,10 @@ namespace MareSynchronosServer.Hubs
                     }, userEntry.CharacterIdentification);
             }
 
+            MareMetrics.Pairs.Dec(otherPairData.Count());
+            MareMetrics.PairsPaused.Dec(otherPairData.Count(c => c.IsPaused));
+            MareMetrics.UsersRegistered.Dec();
+
             _dbContext.RemoveRange(otherPairData);
             _dbContext.Remove(userEntry);
             await _dbContext.SaveChangesAsync();
@@ -94,8 +103,6 @@ namespace MareSynchronosServer.Hubs
             }).ToList();
         }
 
-
-
         [Authorize(AuthenticationSchemes = SecretKeyAuthenticationHandler.AuthScheme)]
         [HubMethodName(Api.InvokeUserPushCharacterDataToVisibleClients)]
         public async Task PushCharacterDataToVisibleClients(CharacterCacheDto characterCache, List<string> visibleCharacterIds)
@@ -119,6 +126,9 @@ namespace MareSynchronosServer.Hubs
                 await Clients.User(pairedUser.UID).SendAsync(Api.OnUserReceiveCharacterData, characterCache,
                     user.CharacterIdentification);
             }
+
+            MareMetrics.UserPushData.Inc();
+            MareMetrics.UserPushDataTo.Inc(visibleCharacterIds.Count);
         }
 
         [HubMethodName(Api.InvokeUserRegister)]
@@ -155,6 +165,8 @@ namespace MareSynchronosServer.Hubs
 
             _logger.LogInformation("User registered: " + user.UID);
 
+            MareMetrics.UsersRegistered.Inc();
+
             await _dbContext.SaveChangesAsync();
             return computedHash;
         }
@@ -212,6 +224,8 @@ namespace MareSynchronosServer.Hubs
                         .SendAsync(Api.OnUserAddOnlinePairedPlayer, user.CharacterIdentification);
                 }
             }
+
+            MareMetrics.Pairs.Inc();
         }
 
         [Authorize(AuthenticationSchemes = SecretKeyAuthenticationHandler.AuthScheme)]
@@ -250,6 +264,15 @@ namespace MareSynchronosServer.Hubs
                     IsSynced = true
                 }, user.CharacterIdentification);
             }
+
+            if (isPaused)
+            {
+                MareMetrics.PairsPaused.Inc();
+            }
+            else
+            {
+                MareMetrics.PairsPaused.Dec();
+            }
         }
 
         [Authorize(AuthenticationSchemes = SecretKeyAuthenticationHandler.AuthScheme)]
@@ -291,6 +314,8 @@ namespace MareSynchronosServer.Hubs
                     }, sender.CharacterIdentification);
                 }
             }
+
+            MareMetrics.Pairs.Dec();
         }
 
         private ClientPair OppositeEntry(string otherUID) =>

MareSynchronosServer/MareSynchronosServer/Hubs/MareHub.cs

@@ -30,6 +30,8 @@ namespace MareSynchronosServer.Hubs
         [HubMethodName(Api.InvokeHeartbeat)]
         public async Task<ConnectionDto> Heartbeat(string? characterIdentification)
         {
+            MareMetrics.InitializedConnections.Inc();
+
             var userId = Context.User!.Claims.SingleOrDefault(c => c.Type == ClaimTypes.NameIdentifier)?.Value;
 
             _logger.LogInformation("Connection from " + userId + ", CI: " + characterIdentification);
@@ -40,6 +42,7 @@ namespace MareSynchronosServer.Hubs
 
             if (userId != null && !isBanned && !string.IsNullOrEmpty(characterIdentification))
             {
+                MareMetrics.AuthorizedConnections.Inc();
                 _logger.LogInformation("Connection from " + userId);
                 var user = (await _dbContext.Users.SingleAsync(u => u.UID == userId));
                 user.CharacterIdentification = characterIdentification;
@@ -52,6 +55,10 @@ namespace MareSynchronosServer.Hubs
                     IsAdmin = user.IsAdmin
                 };
             }
+            else
+            {
+                MareMetrics.UnauthorizedConnections.Inc();
+            }
 
             return new ConnectionDto()
             {
@@ -70,6 +77,7 @@ namespace MareSynchronosServer.Hubs
             var user = await _dbContext.Users.AsNoTracking().SingleOrDefaultAsync(u => u.UID == AuthenticatedUserId);
             if (user != null && !string.IsNullOrEmpty(user.CharacterIdentification))
             {
+                MareMetrics.AuthorizedConnections.Dec();
                 _logger.LogInformation("Disconnect from " + AuthenticatedUserId);
 
                 var otherUsers = await _dbContext.ClientPairs.AsNoTracking()
@@ -91,6 +99,10 @@ namespace MareSynchronosServer.Hubs
                 await Clients.All.SendAsync("UsersOnline",
                     await _dbContext.Users.CountAsync(u => !string.IsNullOrEmpty(u.CharacterIdentification)));
             }
+            else
+            {
+                MareMetrics.UnauthorizedConnections.Dec();
+            }
 
             await base.OnDisconnectedAsync(exception);
         }

MareSynchronosServer/MareSynchronosServer/MareMetrics.cs

@@ -0,0 +1,50 @@
+using System.IO;
+using System.Linq;
+using MareSynchronosServer.Data;
+using Microsoft.Extensions.Configuration;
+using Prometheus;
+
+namespace MareSynchronosServer
+{
+    public class MareMetrics
+    {
+        public static readonly Counter InitializedConnections =
+            Metrics.CreateCounter("mare_initialized_connections", "Initialized Connections");
+        public static readonly Gauge UnauthorizedConnections =
+            Metrics.CreateGauge("mare_unauthorized_connections", "Unauthorized Connections");
+        public static readonly Gauge AuthorizedConnections =
+            Metrics.CreateGauge("mare_authorized_connections", "Authorized Connections");
+
+        public static readonly Gauge UsersRegistered = Metrics.CreateGauge("mare_users_registered", "Total Registrations");
+
+        public static readonly Gauge Pairs = Metrics.CreateGauge("mare_pairs", "Total Pairs");
+        public static readonly Gauge PairsPaused = Metrics.CreateGauge("mare_pairs_paused", "Total Paused Pairs");
+
+        public static readonly Gauge FilesTotal = Metrics.CreateGauge("mare_files", "Total uploaded files");
+        public static readonly Gauge FilesTotalSize =
+            Metrics.CreateGauge("mare_files_size", "Total uploaded files (bytes)");
+
+        public static readonly Counter UserPushData = Metrics.CreateCounter("mare_user_push", "Users pushing data");
+        public static readonly Counter UserPushDataTo =
+            Metrics.CreateCounter("mare_user_push_to", "Users Receiving Data");
+
+        public static readonly Counter UserDownloadedFiles = Metrics.CreateCounter("mare_user_downloaded_files", "Total Downloaded Files by Users");
+        public static readonly Counter UserDownloadedFilesSize = Metrics.CreateCounter("mare_user_downloaded_files_size", "Total Downloaded Files Size by Users");
+
+        public static readonly Gauge
+            CPUUsage = Metrics.CreateGauge("mare_cpu_usage", "Total calculated CPU usage in %");
+        public static readonly Gauge RAMUsage =
+            Metrics.CreateGauge("mare_ram_usage", "Total calculated RAM usage in bytes for Mare + MSSQL");
+        public static readonly Gauge NetworkOut = Metrics.CreateGauge("mare_network_out", "Network out in byte/s");
+        public static readonly Gauge NetworkIn = Metrics.CreateGauge("mare_network_in", "Network in in byte/s");
+
+        public static void InitializeMetrics(MareDbContext dbContext, IConfiguration configuration)
+        {
+            UsersRegistered.IncTo(dbContext.Users.Count());
+            Pairs.IncTo(dbContext.ClientPairs.Count());
+            PairsPaused.IncTo(dbContext.ClientPairs.Count(p => p.IsPaused));
+            FilesTotal.IncTo(dbContext.Files.Count());
+            FilesTotalSize.IncTo(Directory.EnumerateFiles(configuration["CacheDirectory"]).Sum(f => new FileInfo(f).Length));
+        }
+    }
+}

MareSynchronosServer/MareSynchronosServer/MareSynchronosServer.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
+<Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
     <TargetFramework>net6.0</TargetFramework>
@@ -20,6 +20,8 @@
     </PackageReference>
     <PackageReference Include="Microsoft.Extensions.Hosting.Systemd" Version="6.0.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting.WindowsServices" Version="6.0.0" />
+    <PackageReference Include="prometheus-net" Version="6.0.0" />
+    <PackageReference Include="prometheus-net.AspNetCore" Version="6.0.0" />
   </ItemGroup>
 
   <ItemGroup>

MareSynchronosServer/MareSynchronosServer/Program.cs

@@ -4,6 +4,7 @@ using Microsoft.Extensions.Hosting;
 using System.Linq;
 using MareSynchronosServer.Data;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 
@@ -13,7 +14,8 @@ namespace MareSynchronosServer
     {
         public static void Main(string[] args)
         {
-            var host = CreateHostBuilder(args).Build();
+            var hostBuilder = CreateHostBuilder(args);
+            var host = hostBuilder.Build();
 
             using (var scope = host.Services.CreateScope())
             {
@@ -31,6 +33,8 @@ namespace MareSynchronosServer
                 var looseFiles = context.Files.Where(f => f.Uploaded == false);
                 context.RemoveRange(looseFiles);
                 context.SaveChanges();
+
+                MareMetrics.InitializeMetrics(context, services.GetRequiredService<IConfiguration>());
             }
 
             host.Run();

MareSynchronosServer/MareSynchronosServer/Startup.cs

@@ -12,6 +12,7 @@ using MareSynchronosServer.Hubs;
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.Http.Connections;
 using Microsoft.AspNetCore.SignalR;
+using Prometheus;
 using WebSocketOptions = Microsoft.AspNetCore.Builder.WebSocketOptions;
 
 namespace MareSynchronosServer
@@ -40,6 +41,7 @@ namespace MareSynchronosServer
 
             services.AddSingleton<SystemInfoService, SystemInfoService>();
             services.AddSingleton<IUserIdProvider, IdBasedUserIdProvider>();
+            services.AddScoped(_ => Configuration);
 
             services.AddDbContextPool<MareDbContext>(options =>
             {
@@ -62,6 +64,7 @@ namespace MareSynchronosServer
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
         {
+
             if (env.IsDevelopment())
             {
                 app.UseDeveloperExceptionPage();
@@ -83,11 +86,13 @@ namespace MareSynchronosServer
                 KeepAliveInterval = TimeSpan.FromSeconds(10),
             };
 
+            app.UseHttpMetrics();
             app.UseWebSockets(webSocketOptions);
 
             app.UseAuthentication();
             app.UseAuthorization();
 
+
             app.UseEndpoints(endpoints =>
             {
                 endpoints.MapHub<MareHub>(Api.Path, options =>
@@ -96,6 +101,8 @@ namespace MareSynchronosServer
                     options.TransportMaxBufferSize = 5242880;
                     options.Transports = HttpTransportType.WebSockets;
                 });
+
+                endpoints.MapMetrics();
             });
         }
     }

MareSynchronosServer/MareSynchronosServer/SystemInfoService.cs

@@ -86,44 +86,30 @@ public class SystemInfoService : IHostedService, IDisposable
         var bytesSent = endNetworkOut - networkOut;
         var bytesReceived = endNetworkIn - networkIn;
 
-        using var scope = _services.CreateScope();
-        var dbContext = scope.ServiceProvider.GetService<MareDbContext>()!;
 
-        int uploadedFiles = 0;
+        var usedRAM = Process.GetCurrentProcess().WorkingSet64 + Process.GetProcessesByName("sqlservr").FirstOrDefault()?.WorkingSet64 ?? 0;
-        var loggedInUsers = dbContext.Users.Count(u => !string.IsNullOrEmpty(u.CharacterIdentification));
-        var localCacheSize = Directory.EnumerateFiles(_configuration["CacheDirectory"])
-            .ToList().Sum(f =>
-            {
-                uploadedFiles++;
-                try
-                {
-                    return new FileInfo(f).Length;
-                }
-                catch
-                {
-                    return 0;
-                }
-            });
 
+        var cpuUsage = cpuUsageTotal * 100;
         var totalNetworkOut = bytesSent / totalSPassed;
         var totalNetworkIn = bytesReceived / totalSPassed;
-        var cpuUsage = cpuUsageTotal * 100;
+
-        var usedRAM = Process.GetCurrentProcess().WorkingSet64 + Process.GetProcessesByName("sqlservr").FirstOrDefault()?.WorkingSet64 ?? 0;
+        MareMetrics.NetworkIn.Set(totalNetworkIn);
+        MareMetrics.NetworkOut.Set(totalNetworkOut);
+        MareMetrics.CPUUsage.Set(cpuUsage);
+        MareMetrics.RAMUsage.Set(usedRAM);
 
         SystemInfoDto = new SystemInfoDto()
         {
-            CacheUsage = localCacheSize,
+            CacheUsage = 0,
             CpuUsage = cpuUsage,
-            RAMUsage = usedRAM,
+            RAMUsage = 0,
             NetworkIn = totalNetworkIn,
             NetworkOut = totalNetworkOut,
-            OnlineUsers = loggedInUsers,
+            OnlineUsers = (int)MareMetrics.AuthorizedConnections.Value,
-            UploadedFiles = uploadedFiles
+            UploadedFiles = 0
         };
 
         _hubContext.Clients.All.SendAsync(Api.OnUpdateSystemInfo, SystemInfoDto);
-
-        _logger.LogInformation($"CPU:{cpuUsage:0.00}%, RAM Used:{(double)usedRAM / 1024 / 1024 / 1024:0.00}GB, Cache:{(double)localCacheSize / 1024 / 1024 / 1024:0.00}GB, Users:{loggedInUsers}, NetworkIn:{totalNetworkIn / 1024 / 1024:0.00}MB/s, NetworkOut:{totalNetworkOut / 1024 / 1024:0.00}MB/s");
     }
 
     public Task StopAsync(CancellationToken cancellationToken)