📡feat: add structured logging with Serilog & Seq observability stack

- Introduced structured logging using Serilog with centralized ingestion
via Seq for improved observability and log analysis.
- Added a dedicated Seq container to the Docker environment and configured
the API to ship logs over HTTP.
- Enabled request-level logging with Serilog middleware and reduced log
noise by filtering Microsoft and System namespaces, while preserving
EF Core SQL logs in Development.

Author: alysonsz

EventFlow.Presentation/Config/AppConfiguration.cs

@@ -17,14 +17,17 @@ namespace EventFlow.Presentation.Config;
 
 public static class AppConfiguration
 {
-    public static IServiceCollection AddDbContextConfig(this IServiceCollection services, IConfiguration configuration)
+    public static IServiceCollection AddDbContextConfig(this IServiceCollection services, IConfiguration configuration, bool isDevelopment)
     {
         var ConnectionString = configuration.GetConnectionString("DevConnectionString");
 
         services.AddDbContext<EventFlowContext>(options =>
         {
-            options.UseSqlServer(ConnectionString);
-            options.EnableSensitiveDataLogging(true);
+            if (isDevelopment)
+            {
+                options.EnableSensitiveDataLogging(true);
+                options.EnableDetailedErrors(true);
+            }
         });
 
         return services;

EventFlow.Presentation/EventFlow.Presentation.csproj

@@ -26,6 +26,9 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.21.0" />
+    <PackageReference Include="Serilog.AspNetCore" Version="10.0.0" />
+    <PackageReference Include="Serilog.Sinks.Console" Version="6.1.1" />
+    <PackageReference Include="Serilog.Sinks.Seq" Version="9.0.0" />
     <PackageReference Include="Swashbuckle.AspNetCore" Version="6.6.2" />
   </ItemGroup>
 

EventFlow.Presentation/Program.cs

@@ -1,15 +1,19 @@
 using EventFlow.Presentation.Config;
 using EventFlow.Infrastructure.Data;
 using Microsoft.IdentityModel.Tokens;
+using Serilog;
 
 var builder = WebApplication.CreateBuilder(args);
 
+builder.Host.UseSerilog((context, configuration) =>
+    configuration.ReadFrom.Configuration(context.Configuration));
+
 AppConfiguration.ConfigureMvc(builder);
 
 builder.Services.ConfigureSwagger();
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSwaggerGen();
-builder.Services.AddDbContextConfig(builder.Configuration);
+builder.Services.AddDbContextConfig(builder.Configuration, builder.Environment.IsDevelopment());
 builder.Services.AddDependencyInjectionConfig();
 
 builder.Services
@@ -45,11 +49,12 @@
     }
     catch (Exception ex)
     {
-        var logger = services.GetRequiredService<ILogger<Program>>();
-        logger.LogError(ex, "Ocorreu um erro ao aplicar as migrações automáticas.");
+        Log.Fatal(ex, "Ocorreu um erro ao aplicar as migrações automáticas.");
     }
 }
 
+app.UseSerilogRequestLogging();
+
 if (app.Environment.IsDevelopment())
 {
     app.UseSwagger();
@@ -61,4 +66,17 @@
 app.UseAuthorization();
 
 app.MapControllers();
-app.Run();
+
+try
+{
+    Log.Information("Iniciando Web API...");
+    app.Run();
+}
+catch (Exception ex)
+{
+    Log.Fatal(ex, "A API caiu inesperadamente.");
+}
+finally
+{
+    Log.CloseAndFlush();
+}

EventFlow.Presentation/appsettings.json

@@ -1,13 +1,28 @@
 {
-  "Logging": {
-    "LogLevel": {
+  "Serilog": {
+    "Using": [ "Serilog.Sinks.Console", "Serilog.Sinks.Seq" ],
+    "MinimumLevel": {
       "Default": "Information",
-      "Microsoft.AspNetCore": "Warning"
-    }
+      "Override": {
+        "Microsoft": "Warning",
+        "System": "Warning",
+        "Microsoft.Hosting.Lifetime": "Information"
+      }
+    },
+    "WriteTo": [
+      { "Name": "Console" },
+      {
+        "Name": "Seq",
+        "Args": {
+          "serverUrl": "http://localhost:5341"
+        }
+      }
+    ],
+    "Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId" ]
   },
   "AllowedHosts": "*",
   "ConnectionStrings": {
-    "ConnectionString": "Server=INSIRA AQUI O IP; Database = NOME DO SEU BANCO DE DADOS; User Id = SEU USUARIO; Password = SUA SENHA;"
+    "DevConnectionString": "Server=INSIRA AQUI O IP; Database = NOME DO SEU BANCO DE DADOS; User Id = SEU USUARIO; Password = SUA SENHA;"
   },
 
   "Jwt": {

docker-compose.yml

@@ -13,9 +13,18 @@ services:
       - ASPNETCORE_ENVIRONMENT=Development
       - ASPNETCORE_HTTP_PORTS=8079
       - ConnectionStrings__DevConnectionString=Server=eventflow-db;Database=EventFlow;User Id=sa;Password=MyStrongPassword123!;TrustServerCertificate=True;
+      - Jwt__Issuer=EventFlowApi
+      - Jwt__Audience=EventFlowClient
+      - Jwt__Key=UmaChaveMuitoSecretaEMuitoLongaParaDev123!
+      - Serilog__WriteTo__1__Args__serverUrl=http://eventflow-seq:5341
+      - ASPNETCORE_DataProtection__KeyManagement__XmlRepository__Directory=/root/.aspnet/DataProtection-Keys
     depends_on:
       eventflow-db:
         condition: service_healthy
+      eventflow-seq:
+        condition: service_started
+    volumes:
+    - eventflow_keys:/root/.aspnet/DataProtection-Keys
     networks:
       - eventflow-network
 
@@ -38,8 +47,20 @@ services:
     networks:
       - eventflow-network
 
+  eventflow-seq:
+    image: datalust/seq:latest
+    container_name: eventflow-seq
+    environment:
+      - ACCEPT_EULA=Y
+      - SEQ_FIRSTRUN_ADMINPASSWORD=MyStrongPassword123!
+    ports:
+      - "5341:80"
+    networks:
+      - eventflow-network
+
 volumes:
   eventflow_sql_data:
+  eventflow_keys:
 
 networks:
   eventflow-network: