Add healthchecks

Rinkudesu.Services.Links/Rinkudesu.Services.Links.HealthChecks/DatabaseHealthCheck.cs

@@ -0,0 +1,35 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+using Rinkudesu.Services.Links.Data;
+
+namespace Rinkudesu.Services.Links.HealthChecks
+{
+    [ExcludeFromCodeCoverage]
+    public class DatabaseHealthCheck : IHealthCheck
+    {
+        private readonly LinkDbContext _context;
+
+        public DatabaseHealthCheck(LinkDbContext context)
+        {
+            this._context = context;
+        }
+
+        public async Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = new CancellationToken())
+        {
+            if (!await _context.Database.CanConnectAsync(cancellationToken))
+            {
+                return HealthCheckResult.Unhealthy("Unable to connect to the database");
+            }
+            var migrations = await _context.Database.GetPendingMigrationsAsync(cancellationToken);
+            if (migrations?.Any() ?? false)
+            {
+                return HealthCheckResult.Degraded("Database migrations are pending, functionality may be limited");
+            }
+            return HealthCheckResult.Healthy();
+        }
+    }
+}

Rinkudesu.Services.Links/Rinkudesu.Services.Links.HealthChecks/Rinkudesu.Services.Links.HealthChecks.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>netcoreapp3.1</TargetFramework>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\Rinkudesu.Services.Links.Data\Rinkudesu.Services.Links.Data.csproj" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="3.1.18" />
+      <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks.Abstractions" Version="3.1.18" />
+    </ItemGroup>
+
+</Project>

Rinkudesu.Services.Links/Rinkudesu.Services.Links.sln

@@ -12,6 +12,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Rinkudesu.Services.Links.Mo
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Rinkudesu.Services.Links.Data", "Rinkudesu.Services.Links.Data\Rinkudesu.Services.Links.Data.csproj", "{26A791B3-4BAA-4F25-8AE7-AAF90BEC4594}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Rinkudesu.Services.Links.HealthChecks", "Rinkudesu.Services.Links.HealthChecks\Rinkudesu.Services.Links.HealthChecks.csproj", "{E43C4BCB-2BB1-4602-A5BC-AB7216F679E2}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -42,5 +44,9 @@ Global
 		{26A791B3-4BAA-4F25-8AE7-AAF90BEC4594}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{26A791B3-4BAA-4F25-8AE7-AAF90BEC4594}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{26A791B3-4BAA-4F25-8AE7-AAF90BEC4594}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E43C4BCB-2BB1-4602-A5BC-AB7216F679E2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E43C4BCB-2BB1-4602-A5BC-AB7216F679E2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E43C4BCB-2BB1-4602-A5BC-AB7216F679E2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E43C4BCB-2BB1-4602-A5BC-AB7216F679E2}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal

Rinkudesu.Services.Links/Rinkudesu.Services.Links/Dockerfile

@@ -12,4 +12,5 @@ FROM mcr.microsoft.com/dotnet/core/aspnet:3.1 AS final
 EXPOSE 80
 WORKDIR /app
 COPY --from=publish /app/publish .
+HEALTHCHECK --interval=20s --start-period=5s --retries=3 CMD curl --fail http://localhost/health || exit 1
 ENTRYPOINT ["dotnet", "Rinkudesu.Services.Links.dll"]

Rinkudesu.Services.Links/Rinkudesu.Services.Links/Rinkudesu.Services.Links.csproj

@@ -5,8 +5,8 @@
         <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
         <Nullable>enable</Nullable>
         <IsPackable>true</IsPackable>
-        <PackageVersion>0.0.0</PackageVersion>
-        <AssemblyVersion>0.0.0</AssemblyVersion>
+        <PackageVersion>0.2.0</PackageVersion>
+        <AssemblyVersion>0.2.0</AssemblyVersion>
         <FileVersion></FileVersion>
         <Authors>Rinkudesu</Authors>
         <Company>Rinkudesu</Company>
@@ -43,6 +43,7 @@
     </ItemGroup>
 
     <ItemGroup>
+      <ProjectReference Include="..\Rinkudesu.Services.Links.HealthChecks\Rinkudesu.Services.Links.HealthChecks.csproj" />
       <ProjectReference Include="..\Rinkudesu.Services.Links.Models\Rinkudesu.Services.Links.Models.csproj" />
       <ProjectReference Include="..\Rinkudesu.Services.Links.Repositories\Rinkudesu.Services.Links.Repositories.csproj" />
       <ProjectReference Include="..\Rinkudesu.Services.Links.Utilities\Rinkudesu.Services.Links.Utilities.csproj" />

Rinkudesu.Services.Links/Rinkudesu.Services.Links/Startup.cs

@@ -14,6 +14,7 @@
 using Microsoft.OpenApi.Models;
 using Rinkudesu.Services.Links.Data;
 using Rinkudesu.Services.Links.DataTransferObjects;
+using Rinkudesu.Services.Links.HealthChecks;
 using Rinkudesu.Services.Links.Repositories;
 using Rinkudesu.Services.Links.Utilities;
 using Serilog;
@@ -68,6 +69,8 @@ public void ConfigureServices(IServiceCollection services)
                 var xmlPath = AppContext.BaseDirectory;
                 c.IncludeXmlComments(Path.Combine(xmlPath, xmlName));
             });
+
+            services.AddHealthChecks().AddCheck<DatabaseHealthCheck>("Database health check");
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
@@ -91,7 +94,10 @@ public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
 
             app.UseAuthorization();
 
-            app.UseEndpoints(endpoints => { endpoints.MapControllers(); });
+            app.UseEndpoints(endpoints => {
+                endpoints.MapControllers();
+                endpoints.MapHealthChecks("/health");
+            });
 
             if (InputArguments.Current.ApplyMigrations)
             {