eShopOnContainers/src/Web/WebStatus/Startup.cs

using Microsoft.ApplicationInsights.Extensibility;
using Microsoft.ApplicationInsights.ServiceFabric;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using WebStatus.Extensions;

using TimeSpan = System.TimeSpan;

namespace WebStatus
{
	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)
		{
			RegisterAppInsights(services);

			services.AddOptions();

			// Add framework services.
			services.AddHealthChecks(checks =>
			{
				var minutes = 1;
				if (int.TryParse(Configuration["HealthCheck:Timeout"], out int minutesParsed))
				{
					minutes = minutesParsed;
				}

				checks.AddUrlCheckIfNotNull(Configuration["OrderingUrl"], TimeSpan.FromMinutes(minutes));
				checks.AddUrlCheckIfNotNull(Configuration["OrderingBackgroundTasksUrl"], TimeSpan.FromMinutes(minutes));
				checks.AddUrlCheckIfNotNull(Configuration["BasketUrl"], TimeSpan.Zero); //No cache for this HealthCheck, better just for demos                  
				checks.AddUrlCheckIfNotNull(Configuration["CatalogUrl"], TimeSpan.FromMinutes(minutes));
				checks.AddUrlCheckIfNotNull(Configuration["IdentityUrl"], TimeSpan.FromMinutes(minutes));
				checks.AddUrlCheckIfNotNull(Configuration["LocationsUrl"], TimeSpan.FromMinutes(minutes));
				checks.AddUrlCheckIfNotNull(Configuration["MarketingUrl"], TimeSpan.FromMinutes(minutes));
				checks.AddUrlCheckIfNotNull(Configuration["PaymentUrl"], TimeSpan.FromMinutes(minutes));
				checks.AddUrlCheckIfNotNull(Configuration["mvc"], TimeSpan.Zero); //No cache for this HealthCheck, better just for demos 
				checks.AddUrlCheckIfNotNull(Configuration["spa"], TimeSpan.Zero); //No cache for this HealthCheck, better just for demos 
			});

			services
				.AddMvc()
				.SetCompatibilityVersion(Microsoft.AspNetCore.Mvc.CompatibilityVersion.Version_2_1)
				;
		}

		// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
		public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
		{
			loggerFactory.AddAzureWebAppDiagnostics();
			loggerFactory.AddApplicationInsights(app.ApplicationServices, LogLevel.Trace);

			if (env.IsDevelopment())
			{
				app.UseDeveloperExceptionPage();
			}
			else
			{
				app.UseExceptionHandler("/Home/Error");
			}

			var pathBase = Configuration["PATH_BASE"];
			if (!string.IsNullOrEmpty(pathBase))
			{
				app.UsePathBase(pathBase);
			}


#pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously
			app.Map("/liveness", lapp => lapp.Run(async ctx => ctx.Response.StatusCode = 200));
#pragma warning restore CS1998 // Async method lacks 'await' operators and will run synchronously

			app.UseStaticFiles();

			app.UseMvc(routes =>
			{
				routes.MapRoute(
				 name: "default",
				 template: "{controller=Home}/{action=Index}/{id?}");
			});
		}

		private void RegisterAppInsights(IServiceCollection services)
		{
			services.AddApplicationInsightsTelemetry(Configuration);
			var orchestratorType = Configuration.GetValue<string>("OrchestratorType");

			if (orchestratorType?.ToUpper() == "K8S")
			{
				// Enable K8s telemetry initializer
				services.EnableKubernetes();
			}
			if (orchestratorType?.ToUpper() == "SF")
			{
				// Enable SF telemetry initializer
				services.AddSingleton<ITelemetryInitializer>((serviceProvider) =>
				    new FabricTelemetryInitializer());
			}
		}
	}
}