Configured Nginx as a reverse proxy and load balancer for Docker Comp…

…ose setup in Helpdesk sample

Cofigured it fully with Swagger and other Kestrel quirks

Sample/Helpdesk/Helpdesk.Api/.dockerignore

@@ -2,5 +2,5 @@
 **/obj/
 **/out/
 **/TestResults/
-**/Internal/Generated
+**/Internal/
 Dockerfile

Sample/Helpdesk/Helpdesk.Api/Dockerfile

@@ -21,20 +21,23 @@ RUN dotnet restore ./${project_name}.csproj
 COPY ./ ./
 
 # Run code generation depending on the build argument
-RUN if [ "run_codegen" = true ] ; then dotnet run -- codegen write & dotnet run -- codegen test; else echo "skipping code generation"; fi
+RUN if [ "${run_codegen}" = true ] ; then dotnet run -- codegen write & dotnet run -- codegen test; else echo "skipping code generation"; fi
+
+RUN ls
+RUN ls -R Internal
 
 # Build project with Release configuration
 # and no restore, as we did it already
 RUN dotnet build -c Release --no-restore ./${project_name}.csproj
 
 ## Test project with Release configuration
 ## and no build, as we did it already
-#RUN dotnet test -c Release --no-build ./Sample/Tickets/Tickets.Api/Tickets.Api.csproj
+# RUN dotnet test -c Release --no-build ./Sample/Tickets/Tickets.Api/Tickets.Api.csproj
 
 # Publish project to output folder
 # and no build, as we did it already
 WORKDIR /app/
-RUN ls
+
 RUN dotnet publish -c Release --no-build -o out
 
 ########################################

Sample/Helpdesk/Helpdesk.Api/Incidents/GetCustomerIncidentsSummary/IncidentSummary.cs

@@ -24,6 +24,7 @@ public CustomerIncidentsSummaryProjection()
 
     public void Apply(IncidentLogged logged, CustomerIncidentsSummary current)
     {
+        current.Id = logged.CustomerId;
         current.Pending++;
     }
 

Sample/Helpdesk/Helpdesk.Api/Program.cs

@@ -15,6 +15,7 @@
 using Marten.Events.Projections;
 using Marten.Pagination;
 using Marten.Schema.Identity;
+using Microsoft.AspNetCore.HttpOverrides;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.SignalR;
 using Oakton;
@@ -27,7 +28,7 @@
 
 var builder = WebApplication.CreateBuilder(args);
 
-
+builder.WebHost.UseUrls("http://*:5248");
 builder.Services
     .AddEndpointsApiExplorer()
     .AddSwaggerGen()
@@ -53,15 +54,25 @@
         options.Projections.Add<IncidentShortInfoProjection>(ProjectionLifecycle.Inline);
         options.Projections.Add<CustomerIncidentsSummaryProjection>(ProjectionLifecycle.Async);
 
+        options.ApplicationAssembly = typeof(CustomerIncidentsSummaryProjection).Assembly;
+
         return options;
     })
     .AddSubscriptionWithServices<KafkaProducer>(ServiceLifetime.Singleton)
     .AddSubscriptionWithServices<SignalRProducer<IncidentsHub>>(ServiceLifetime.Singleton)
     .OptimizeArtifactWorkflow(TypeLoadMode.Static)
+    .ApplyAllDatabaseChangesOnStartup()
     .UseLightweightSessions()
-    .AddAsyncDaemon(DaemonMode.Solo);
+    .AddAsyncDaemon(DaemonMode.HotCold);
 
 
+// Header forwarding to enable Swagger in Nginx
+builder.Services.Configure<ForwardedHeadersOptions>(options =>
+{
+    options.ForwardedHeaders =
+        ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
+});
+
 builder.Services
     .AddCors(options =>
         options.AddPolicy("ClientPermission", policy =>
@@ -235,11 +246,9 @@ await documentSession.GetAndUpdate<Incident>(incidentId, ToExpectedVersion(eTag)
         querySession.Json.WriteById<CustomerIncidentsSummary>(customerId, context)
 );
 
-if (app.Environment.IsDevelopment())
-{
-    app.UseSwagger()
-        .UseSwaggerUI();
-}
+app.UseSwagger()
+    .UseSwaggerUI()
+    .UseForwardedHeaders(); // Header forwarding to enable Swagger in Nginx
 
 
 app.UseCors("ClientPermission");

Sample/Helpdesk/Helpdesk.Api/docker-compose.yml

@@ -0,0 +1,40 @@
+version: "3.8"
+services:
+    nginx:
+        restart: always
+        image: nginx:alpine
+        ports:
+            - 8089:80
+        volumes:
+            - ./nginx.conf:/etc/nginx/nginx.conf
+#            - ./nginx.conf:/etc/nginx/conf.d/default.conf
+        depends_on:
+            - backend
+
+    backend:
+        build:
+            dockerfile: Dockerfile
+            context: .
+            args:
+                project_name: Helpdesk.Api
+                run_codegen: true
+        deploy:
+            replicas: 3
+        depends_on:
+            postgres:
+                condition: service_healthy
+        restart: always
+
+    postgres:
+        image: postgres:15.1-alpine
+        container_name: postgres
+        healthcheck:
+            test: ["CMD-SHELL", "pg_isready -U postgres"]
+            interval: 5s
+            timeout: 5s
+            retries: 5
+        environment:
+            - POSTGRES_DB=postgres
+            - POSTGRES_PASSWORD=Password12!
+        ports:
+            - "5432:5432"

Sample/Helpdesk/Helpdesk.Api/nginx.conf

@@ -0,0 +1,26 @@
+worker_processes auto;
+
+events {
+    worker_connections 1024;
+}
+
+http {
+    map $http_connection $connection_upgrade {
+        "~*Upgrade" $http_connection;
+        default keep-alive;
+    }
+
+    server {
+        listen 80;
+        location / {
+            proxy_pass         http://backend:5248/;
+            proxy_http_version 1.1;
+            proxy_set_header   Upgrade $http_upgrade;
+            proxy_set_header   Connection $connection_upgrade;
+            proxy_set_header   Host $host;
+            proxy_cache_bypass $http_upgrade;
+            proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header   X-Forwarded-Proto $scheme;
+        }
+    }
+}