From a720688bfd9508ffc63592b3d74042d8a7f2fd68 Mon Sep 17 00:00:00 2001
From: Sipke Schoorstra <sipkeschoorstra@outlook.com>
Date: Sun, 24 Mar 2024 20:27:38 +0100
Subject: [PATCH] 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.
---
 .../Elsa.Server.LoadBalancer.csproj           | 13 +++++++
 .../Elsa.Server.LoadBalancer/FodyWeavers.xml  |  1 +
 .../Elsa.Server.LoadBalancer/Program.cs       |  5 +++
 .../Properties/launchSettings.json            | 38 +++++++++++++++++++
 .../appsettings.Development.json              |  8 ++++
 .../Elsa.Server.LoadBalancer/appsettings.json | 29 ++++++++++++++
 6 files changed, 94 insertions(+)
 create mode 100644 src/bundles/Elsa.Server.LoadBalancer/Elsa.Server.LoadBalancer.csproj
 create mode 100644 src/bundles/Elsa.Server.LoadBalancer/FodyWeavers.xml
 create mode 100644 src/bundles/Elsa.Server.LoadBalancer/Program.cs
 create mode 100644 src/bundles/Elsa.Server.LoadBalancer/Properties/launchSettings.json
 create mode 100644 src/bundles/Elsa.Server.LoadBalancer/appsettings.Development.json
 create mode 100644 src/bundles/Elsa.Server.LoadBalancer/appsettings.json

diff --git a/src/bundles/Elsa.Server.LoadBalancer/Elsa.Server.LoadBalancer.csproj b/src/bundles/Elsa.Server.LoadBalancer/Elsa.Server.LoadBalancer.csproj
new file mode 100644
index 000000000..138ee315f
--- /dev/null
+++ b/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>
diff --git a/src/bundles/Elsa.Server.LoadBalancer/FodyWeavers.xml b/src/bundles/Elsa.Server.LoadBalancer/FodyWeavers.xml
new file mode 100644
index 000000000..06ee72161
--- /dev/null
+++ b/src/bundles/Elsa.Server.LoadBalancer/FodyWeavers.xml
@@ -0,0 +1 @@
+<Weavers xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="FodyWeavers.xsd" />
\ No newline at end of file
diff --git a/src/bundles/Elsa.Server.LoadBalancer/Program.cs b/src/bundles/Elsa.Server.LoadBalancer/Program.cs
new file mode 100644
index 000000000..1a98c9fb1
--- /dev/null
+++ b/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();
\ No newline at end of file
diff --git a/src/bundles/Elsa.Server.LoadBalancer/Properties/launchSettings.json b/src/bundles/Elsa.Server.LoadBalancer/Properties/launchSettings.json
new file mode 100644
index 000000000..241626351
--- /dev/null
+++ b/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"
+      }
+    }
+  }
+}
diff --git a/src/bundles/Elsa.Server.LoadBalancer/appsettings.Development.json b/src/bundles/Elsa.Server.LoadBalancer/appsettings.Development.json
new file mode 100644
index 000000000..0c208ae91
--- /dev/null
+++ b/src/bundles/Elsa.Server.LoadBalancer/appsettings.Development.json
@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}
diff --git a/src/bundles/Elsa.Server.LoadBalancer/appsettings.json b/src/bundles/Elsa.Server.LoadBalancer/appsettings.json
new file mode 100644
index 000000000..6ce85ebce
--- /dev/null
+++ b/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/"
+          }
+        }
+      }
+    }
+  }
+}