From 48124346c0b3d12d010160e429042acaa562529a Mon Sep 17 00:00:00 2001
From: Denis Nutiu <denis.nutiu@gmail.com>
Date: Fri, 16 Jul 2021 20:49:46 +0300
Subject: [PATCH] Add support for Prometheus metrics on /metrics.

---
 Retroactiune.WebAPI/Retroactiune.WebAPI.csproj | 2 ++
 Retroactiune.WebAPI/Startup.cs                 | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/Retroactiune.WebAPI/Retroactiune.WebAPI.csproj b/Retroactiune.WebAPI/Retroactiune.WebAPI.csproj
index ae4f95a..9f3c7c0 100644
--- a/Retroactiune.WebAPI/Retroactiune.WebAPI.csproj
+++ b/Retroactiune.WebAPI/Retroactiune.WebAPI.csproj
@@ -11,6 +11,8 @@
       <PackageReference Include="AutoMapper" Version="10.1.1" />
       <PackageReference Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="8.1.1" />
       <PackageReference Include="MongoDB.Driver" Version="2.12.3" />
+      <PackageReference Include="prometheus-net" Version="4.2.0" />
+      <PackageReference Include="prometheus-net.AspNetCore" Version="4.2.0" />
       <PackageReference Include="Swashbuckle.AspNetCore" Version="5.6.3" />
     </ItemGroup>
 
diff --git a/Retroactiune.WebAPI/Startup.cs b/Retroactiune.WebAPI/Startup.cs
index 61909c3..f79b6b2 100644
--- a/Retroactiune.WebAPI/Startup.cs
+++ b/Retroactiune.WebAPI/Startup.cs
@@ -9,6 +9,7 @@ using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using MongoDB.Driver;
+using Prometheus;
 using Retroactiune.Core.Interfaces;
 using Retroactiune.Core.Services;
 using Retroactiune.Infrastructure;
@@ -19,7 +20,6 @@ namespace Retroactiune
     public class Startup
     {
         // TODO: Support for Sentry.
-        // TODO: Support for Prometheus.
         // TODO: External auth provider.
         // TODO: UI? 
         public Startup(IConfiguration configuration)
@@ -68,6 +68,8 @@ namespace Retroactiune
                 app.UseDeveloperExceptionPage();
             }
 
+            app.UseMetricServer();
+            
             app.UseSwagger();
             app.UseSwaggerUI(c =>
             {