Add LoadBalancer bundle to Elsa.Server

This commit introduces a new bundle for load balancing into the Elsa.Server solution. It includes initial configuration files, launch settings, and reverse proxy setup. The load balancer is configured with a RoundRobin policy and the project references the Yarp.ReverseProxy package.

src/bundles/Elsa.Server.LoadBalancer/Elsa.Server.LoadBalancer.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>enable</ImplicitUsings>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Yarp.ReverseProxy"/>
+    </ItemGroup>
+
+</Project>

src/bundles/Elsa.Server.LoadBalancer/FodyWeavers.xml

@@ -0,0 +1 @@
+<Weavers xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="FodyWeavers.xsd" />

src/bundles/Elsa.Server.LoadBalancer/Program.cs

@@ -0,0 +1,5 @@
+var builder = WebApplication.CreateBuilder(args);
+builder.Services.AddReverseProxy().LoadFromConfig(builder.Configuration.GetSection("ReverseProxy"));
+var app = builder.Build();
+app.MapReverseProxy();
+app.Run();

src/bundles/Elsa.Server.LoadBalancer/Properties/launchSettings.json

@@ -0,0 +1,38 @@
+{
+  "$schema": "http://json.schemastore.org/launchsettings.json",
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:28212",
+      "sslPort": 44310
+    }
+  },
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5272",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": true,
+      "applicationUrl": "https://localhost:7036;http://localhost:5272",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

src/bundles/Elsa.Server.LoadBalancer/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

src/bundles/Elsa.Server.LoadBalancer/appsettings.json

@@ -0,0 +1,29 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*",
+  "ReverseProxy": {
+    "Routes": {
+      "route1": {
+        "ClusterId": "cluster1",
+        "Match": {
+          "Path": "{**catch-all}"
+        }
+      }
+    },
+    "Clusters": {
+      "cluster1": {
+        "LoadBalancingPolicy": "RoundRobin",
+        "Destinations": {
+          "cluster1/destination1": {
+            "Address": "https://localhost:5001/"
+          }
+        }
+      }
+    }
+  }
+}