var configuration = GetConfiguration(); Log.Logger = CreateSerilogLogger(configuration); try { Log.Information("Configuring web host ({ApplicationContext})...", Program.AppName); var host = BuildWebHost(configuration, args); Log.Information("Starting web host ({ApplicationContext})...", Program.AppName); host.Run(); return 0; } catch (Exception ex) { Log.Fatal(ex, "Program terminated unexpectedly ({ApplicationContext})!", Program.AppName); return 1; } finally { Log.CloseAndFlush(); } IWebHost BuildWebHost(IConfiguration configuration, string[] args) => WebHost.CreateDefaultBuilder(args) .CaptureStartupErrors(false) .ConfigureKestrel(options => { var ports = GetDefinedPorts(configuration); options.Listen(IPAddress.Any, ports.httpPort, listenOptions => { listenOptions.Protocols = HttpProtocols.Http1AndHttp2; }); options.Listen(IPAddress.Any, ports.grpcPort, listenOptions => { listenOptions.Protocols = HttpProtocols.Http2; }); }) .ConfigureAppConfiguration(x => x.AddConfiguration(configuration)) .UseFailing(options => { options.ConfigPath = "/Failing"; options.NotFilteredPaths.AddRange(new[] { "/hc", "/liveness" }); }) .UseStartup() .UseContentRoot(Directory.GetCurrentDirectory()) .UseSerilog() .Build(); Serilog.ILogger CreateSerilogLogger(IConfiguration configuration) { var seqServerUrl = configuration["Serilog:SeqServerUrl"]; var logstashUrl = configuration["Serilog:LogstashgUrl"]; return new LoggerConfiguration() .MinimumLevel.Verbose() .Enrich.WithProperty("ApplicationContext", Program.AppName) .Enrich.FromLogContext() .WriteTo.Console() .WriteTo.Seq(string.IsNullOrWhiteSpace(seqServerUrl) ? "http://seq" : seqServerUrl) .WriteTo.Http(string.IsNullOrWhiteSpace(logstashUrl) ? "http://logstash:8080" : logstashUrl) .ReadFrom.Configuration(configuration) .CreateLogger(); } IConfiguration GetConfiguration() { var builder = new ConfigurationBuilder() .SetBasePath(Directory.GetCurrentDirectory()) .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true) .AddEnvironmentVariables(); var config = builder.Build(); if (config.GetValue("UseVault", false)) { TokenCredential credential = new ClientSecretCredential( config["Vault:TenantId"], config["Vault:ClientId"], config["Vault:ClientSecret"]); builder.AddAzureKeyVault(new Uri($"https://{config["Vault:Name"]}.vault.azure.net/"), credential); } return builder.Build(); } (int httpPort, int grpcPort) GetDefinedPorts(IConfiguration config) { var grpcPort = config.GetValue("GRPC_PORT", 5001); var port = config.GetValue("PORT", 80); return (port, grpcPort); } public class Program { public static string Namespace = typeof(Startup).Namespace; public static string AppName = Namespace.Substring(Namespace.LastIndexOf('.', Namespace.LastIndexOf('.') - 1) + 1); }