Project to help get started with Healthchecks in ASP.NET Core 2.2.

.gitignore

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+/Healthcheck/bin
+/Healthcheck/obj
+/Healthcheck/healthchecksdb
+/.vs

Healthcheck.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.29209.152
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Healthcheck", "Healthcheck\Healthcheck.csproj", "{5DDF3F4D-5BCD-4FF0-9A0D-13D2E72821F3}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{5DDF3F4D-5BCD-4FF0-9A0D-13D2E72821F3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5DDF3F4D-5BCD-4FF0-9A0D-13D2E72821F3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5DDF3F4D-5BCD-4FF0-9A0D-13D2E72821F3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5DDF3F4D-5BCD-4FF0-9A0D-13D2E72821F3}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {16BADAE4-1CE0-488A-85DD-489EFBD51CDC}
+	EndGlobalSection
+EndGlobal

Healthcheck/Connected Services/Application Insights/ConnectedService.json

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+{
+  "ProviderId": "Microsoft.ApplicationInsights.ConnectedService.ConnectedServiceProvider",
+  "Version": "9.1.815.1",
+  "GettingStartedDocument": {
+    "Uri": "https://go.microsoft.com/fwlink/?LinkID=798432"
+  }
+}

Healthcheck/Controllers/HomeController.cs

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+using Healthcheck.Models;
+using Microsoft.AspNetCore.Mvc;
+using System.Diagnostics;
+
+namespace Healthcheck.Controllers
+{
+    public class HomeController : Controller
+    {
+        public IActionResult Index()
+        {
+            return View();
+        }
+
+        public IActionResult Privacy()
+        {
+            return View();
+        }
+
+        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+        public IActionResult Error()
+        {
+            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
+        }
+    }
+}

Healthcheck/Healthcheck.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp2.2</TargetFramework>
+    <AspNetCoreHostingModel>InProcess</AspNetCoreHostingModel>
+    <ApplicationInsightsResourceId>/subscriptions/**azuresubscriptionkey**/resourcegroups/Default-ApplicationInsights-EastUS/providers/microsoft.insights/components/Healthcheck</ApplicationInsightsResourceId>
+    <ApplicationInsightsAnnotationResourceId>/subscriptions/**azuresubscriptionkey**/resourcegroups/Default-ApplicationInsights-EastUS/providers/microsoft.insights/components/Healthcheck</ApplicationInsightsAnnotationResourceId>
+  </PropertyGroup>
+
+
+  <ItemGroup>
+    <PackageReference Include="AspNetCore.HealthChecks.Publisher.ApplicationInsights" Version="2.2.4" />
+    <PackageReference Include="AspNetCore.HealthChecks.Redis" Version="2.2.4" />
+    <PackageReference Include="AspNetCore.HealthChecks.SqlServer" Version="2.2.1" />
+    <PackageReference Include="AspNetCore.HealthChecks.UI" Version="2.2.34" />
+    <PackageReference Include="AspNetCore.HealthChecks.Uris" Version="2.2.3" />
+    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.7.0" />
+    <PackageReference Include="Microsoft.AspNetCore.App" />
+    <PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.2.0" PrivateAssets="All" />
+  </ItemGroup>
+
+
+  <ItemGroup>
+    <WCFMetadata Include="Connected Services" />
+  </ItemGroup>
+
+</Project>

Healthcheck/Models/ErrorViewModel.cs

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+using System;
+
+namespace Healthcheck.Models
+{
+    public class ErrorViewModel
+    {
+        public string RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+    }
+}

Healthcheck/Program.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+
+namespace Healthcheck
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+            CreateWebHostBuilder(args).Build().Run();
+        }
+
+        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
+            WebHost.CreateDefaultBuilder(args)
+                .UseApplicationInsights()
+                .UseStartup<Startup>();
+    }
+}

Healthcheck/Properties/launchSettings.json

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+{
+  "iisSettings": {
+    "windowsAuthentication": false, 
+    "anonymousAuthentication": true, 
+    "iisExpress": {
+      "applicationUrl": "http://localhost:59658",
+      "sslPort": 0
+    }
+  },
+  "profiles": {
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "Healthcheck": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "applicationUrl": "http://localhost:5000",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

Healthcheck/Startup.cs

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+using HealthChecks.UI.Client;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Diagnostics.HealthChecks;
+using Microsoft.AspNetCore.Hosting;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Diagnostics.HealthChecks;
+using System;
+
+namespace Healthcheck
+{
+    public class Startup
+    {
+        public Startup(IConfiguration configuration)
+        {
+            Configuration = configuration;
+        }
+
+        public IConfiguration Configuration { get; }
+
+        // This method gets called by the runtime. Use this method to add services to the container.
+        public void ConfigureServices(IServiceCollection services)
+        {
+            services.Configure<CookiePolicyOptions>(options =>
+            {
+                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
+                options.CheckConsentNeeded = context => true;
+                options.MinimumSameSitePolicy = SameSiteMode.None;
+            });
+
+            services.AddHealthChecks()
+                    .AddSqlServer(connectionString: Configuration.GetConnectionString("SqlServerDatabase"),
+                              healthQuery: "SELECT 1;",
+                              name: "Sql Server",
+                              failureStatus: HealthStatus.Degraded)
+                    .AddRedis(redisConnectionString: Configuration.GetConnectionString("RedisCache"),
+                                    name: "Redis",
+                                    failureStatus: HealthStatus.Degraded)
+                    .AddUrlGroup(new Uri("http://www.google.com"),
+                                    name: "Base URL",
+                                    failureStatus: HealthStatus.Degraded)
+                    .AddApplicationInsightsPublisher();
+
+            services.AddHealthChecksUI(setupSettings: setup =>
+                    {
+                        setup.AddHealthCheckEndpoint("Basic healthcheck", "http://localhost:59658/healthcheck");
+                    });
+
+            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
+        }
+
+        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
+        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
+        {
+            if (env.IsDevelopment())
+            {
+                app.UseDeveloperExceptionPage();
+            }
+            else
+            {
+                app.UseExceptionHandler("/Home/Error");
+            }
+
+            app.UseStaticFiles();
+            app.UseCookiePolicy();
+
+            app.UseHealthChecks("/healthcheck", new HealthCheckOptions
+            {
+                Predicate = _ => true,
+                ResponseWriter = UIResponseWriter.WriteHealthCheckUIResponse
+            })
+            .UseHealthChecksUI(setup =>
+            {
+                setup.AddCustomStylesheet(@"wwwroot\css\dotnet.css");
+            });
+
+            app.UseHealthChecksUI();
+
+            app.UseMvc(routes =>
+            {
+                routes.MapRoute(
+                    name: "default",
+                    template: "{controller=Home}/{action=Index}/{id?}");
+            });
+        }
+    }
+}

Healthcheck/Views/Home/Index.cshtml

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+@{
+    ViewData["Title"] = "Home Page";
+}
+
+<div class="text-center">
+    <h1 class="display-4">Welcome</h1>
+    <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
+</div>

Healthcheck/Views/Home/Privacy.cshtml

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+@{
+    ViewData["Title"] = "Privacy Policy";
+}
+<h1>@ViewData["Title"]</h1>
+
+<p>Use this page to detail your site's privacy policy.</p>

Healthcheck/Views/Shared/Error.cshtml

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+@model ErrorViewModel
+@{
+    ViewData["Title"] = "Error";
+}
+
+<h1 class="text-danger">Error.</h1>
+<h2 class="text-danger">An error occurred while processing your request.</h2>
+
+@if (Model.ShowRequestId)
+{
+    <p>
+        <strong>Request ID:</strong> <code>@Model.RequestId</code>
+    </p>
+}
+
+<h3>Development Mode</h3>
+<p>
+    Swapping to <strong>Development</strong> environment will display more detailed information about the error that occurred.
+</p>
+<p>
+    <strong>The Development environment shouldn't be enabled for deployed applications.</strong>
+    It can result in displaying sensitive information from exceptions to end users.
+    For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
+    and restarting the app.
+</p>

Healthcheck/Views/Shared/_CookieConsentPartial.cshtml

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+@using Microsoft.AspNetCore.Http.Features
+
+@{
+    var consentFeature = Context.Features.Get<ITrackingConsentFeature>();
+    var showBanner = !consentFeature?.CanTrack ?? false;
+    var cookieString = consentFeature?.CreateConsentCookie();
+}
+
+@if (showBanner)
+{
+    <div id="cookieConsent" class="alert alert-info alert-dismissible fade show" role="alert">
+        Use this space to summarize your privacy and cookie use policy. <a asp-area="" asp-controller="Home" asp-action="Privacy">Learn More</a>.
+        <button type="button" class="accept-policy close" data-dismiss="alert" aria-label="Close" data-cookie-string="@cookieString">
+            <span aria-hidden="true">Accept</span>
+        </button>
+    </div>
+    <script>
+        (function () {
+            var button = document.querySelector("#cookieConsent button[data-cookie-string]");
+            button.addEventListener("click", function (event) {
+                document.cookie = button.dataset.cookieString;
+            }, false);
+        })();
+    </script>
+}