feat: switching to logging via OpenTelemetry

ApiDto/Requests/Configuration/LoggingRequest.cs

@@ -24,15 +24,16 @@ public class LoggingRequest
     public string? LogFilePath { get; set; }
 
     /// <summary>
-    /// Gets or sets the API key for integrating with Seq, a log aggregation service.
+    /// Gets or sets the endpoint URL for the OpenTelemetry Collector.
-    /// If provided, logs will be sent to a Seq server using this API key.
+    /// This property specifies the OTLP endpoint to which logs will be sent.
     /// </summary>
-    public string? ApiKeySeq { get; set; }
+    public string? OpenTelemetryEndpoint { get; set; }
 
     /// <summary>
-    /// Gets or sets the server URL for the Seq logging service.
+    /// Gets or sets the logical service name used for OpenTelemetry logging.
-    /// This property specifies the Seq server endpoint to which logs will be sent.
+    /// This name will be attached to log entries as the "service.name" resource attribute,
-    /// If <see cref="ApiKeySeq"/> is provided, logs will be sent to this server.
+    /// allowing logs to be grouped and filtered by service in backends like Loki or Grafana.
     /// </summary>
-    public string? ApiServerSeq { get; set; }
+    public string? OpenTelemetryServiceName { get; set; }
+
 }

Endpoint/Configuration/Core/Startup/LoggerConfiguration.cs

@@ -8,7 +8,7 @@ using Serilog.Context;
 using Serilog.Events;
 using Serilog.Filters;
 using Serilog.Formatting.Compact;
-using System;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
 
@@ -46,9 +46,18 @@ public static class LoggerConfiguration
                     rollingInterval: RollingInterval.Day);
             }
 
-            if (generalConfig != null && !string.IsNullOrEmpty(generalConfig.ApiServerSeq) &&
+            if (!string.IsNullOrEmpty(generalConfig?.OpenTelemetryEndpoint)
-                Uri.TryCreate(generalConfig.ApiServerSeq, UriKind.Absolute, out var _))
+                && !string.IsNullOrEmpty(generalConfig.OpenTelemetryServiceName))
-                configuration.WriteTo.Seq(generalConfig.ApiServerSeq, apiKey: generalConfig.ApiKeySeq);
+                configuration.WriteTo.OpenTelemetry(options =>
+                {
+                    options.Endpoint = generalConfig.OpenTelemetryEndpoint;
+                    options.Protocol = Serilog.Sinks.OpenTelemetry.OtlpProtocol.Grpc;
+                    options.ResourceAttributes = new Dictionary<string, object>
+                    {
+                        ["service.name"] = generalConfig.OpenTelemetryServiceName,
+                        ["deployment.environment"] = context.HostingEnvironment.EnvironmentName
+                    };
+                });
 
             configuration
                 .MinimumLevel.Override("Microsoft.AspNetCore.Hosting", LogEventLevel.Warning)

Endpoint/Configuration/Model/GeneralSettings/LogSettings.cs

@@ -9,13 +9,13 @@ public class LogSettings : IIsConfigured
     public bool EnableLogToFile { get; set; }
     public string? LogFilePath { get; set; }
     public string? LogFileName { get; set; }
-    public string? ApiKeySeq { get; set; }
+    public string? OpenTelemetryEndpoint { get; set; }
-    public string? ApiServerSeq { get; set; }
+    public string? OpenTelemetryServiceName { get; set; }
 
     public bool IsConfigured()
     {
-        return !EnableLogToFile ||
+        return !EnableLogToFile
-               !string.IsNullOrEmpty(LogFilePath) &&
+                || !string.IsNullOrEmpty(LogFilePath)
-               !string.IsNullOrEmpty(LogFileName);
+                && !string.IsNullOrEmpty(LogFileName);
     }
 }

Endpoint/Controllers/SetupConfiguration/SetupController.cs

@@ -23,6 +23,7 @@ using Mirea.Api.Security.Services;
 using MySqlConnector;
 using Npgsql;
 using Serilog;
+using Serilog.Sinks.OpenTelemetry;
 using StackExchange.Redis;
 using System;
 using System.Collections.Generic;
@@ -434,26 +435,32 @@ public class SetupController(
             }
         };
 
-        if (!string.IsNullOrEmpty(request?.ApiServerSeq))
+        if (!string.IsNullOrEmpty(request?.OpenTelemetryEndpoint)
+            && !string.IsNullOrEmpty(request.OpenTelemetryServiceName))
         {
-            settings.ApiServerSeq = request.ApiServerSeq;
+            settings.OpenTelemetryEndpoint = request.OpenTelemetryEndpoint;
-            settings.ApiKeySeq = request.ApiKeySeq;
+            settings.OpenTelemetryServiceName = request.OpenTelemetryServiceName;
 
             try
             {
-                Log.Logger = new LoggerConfiguration()
+                using var innerLogger = new LoggerConfiguration()
-                    .WriteTo.Seq(settings.ApiServerSeq, apiKey: settings.ApiKeySeq)
+                    .WriteTo.OpenTelemetry(options =>
+                    {
+                        options.Endpoint = settings.OpenTelemetryEndpoint;
+                        options.Protocol = OtlpProtocol.Grpc;
+                        options.ResourceAttributes = new Dictionary<string, object>
+                        {
+                            ["service.name"] = settings.OpenTelemetryServiceName,
+                            ["deployment.environment"] = "test"
+                        };
+                    })
                     .CreateLogger();
 
-                Log.Warning("Testing configuration Seq.");
+                innerLogger.Warning("🚀 Testing OpenTelemetry log delivery.");
             }
-            catch
+            catch (Exception ex)
             {
-                // ignoring
+                Console.WriteLine("Error sending log to OTEL Collector: " + ex.Message);
-            }
-            finally
-            {
-                Log.CloseAndFlush();
             }
         }
 
@@ -476,9 +483,7 @@ public class SetupController(
         {
             EnableLogToFile = settings.EnableLogToFile,
             LogFileName = settings.LogFileName,
-            LogFilePath = settings.LogFilePath,
+            LogFilePath = settings.LogFilePath
-            ApiKeySeq = settings.ApiKeySeq,
-            ApiServerSeq = settings.ApiServerSeq
         });
 
         return true;

Endpoint/Endpoint.csproj

@@ -53,7 +53,7 @@
 		<PackageReference Include="Serilog.Sinks.Debug" Version="3.0.0" />
     <PackageReference Include="Serilog.Sinks.File" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Caching.StackExchangeRedis" Version="9.0.8" />
-		<PackageReference Include="Serilog.Sinks.Seq" Version="9.0.0" />
+    <PackageReference Include="Serilog.Sinks.OpenTelemetry" Version="4.2.0" />
     <PackageReference Include="StackExchange.Redis" Version="2.8.58" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="9.0.3" />
     <PackageReference Include="Swashbuckle.AspNetCore.Swagger" Version="9.0.3" />