ASP.NET Core provides a robust, flexible, and high-performance hosting model for running web applications. This tutorial covers the essential aspects of hosting an ASP.NET Core application, including the hosting environment, configuration, and deployment strategies.
Hosting in ASP.NET Core is the process of starting up and running a web application. It involves configuring the server, managing the application lifecycle, and handling requests and responses.
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateWebHostBuilder(args).Build().Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>();
}
}
This example provides an overview of the basic hosting process in an ASP.NET Core application.
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
var host = CreateWebHostBuilder(args).Build();
host.Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.ConfigureServices(services =>
{
// Configure services here
})
.Configure(app =>
{
// Configure middleware here
});
}
}
This example illustrates the components involved in hosting an ASP.NET Core application.
ASP.NET Core supports two primary hosting models: in-process and out-of-process. In-process hosting runs the application within the IIS worker process, while out-of-process hosting runs the application in a separate process.
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
webBuilder.UseIIS();
});
}
}
This example demonstrates setting up in-process hosting in an ASP.NET Core application.
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
webBuilder.UseKestrel();
});
}
}
This example shows how to configure out-of-process hosting for an ASP.NET Core application.
ASP.NET Core introduced the Generic Host in version 2.1, providing a unified way to configure and run both web and non-web applications. The Web Host is specifically tailored for web applications.
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateWebHostBuilder(args).Build().Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>();
}
}
This example illustrates creating and configuring a Web Host in an ASP.NET Core application.
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
});
}
}
This example demonstrates setting up a Generic Host for an ASP.NET Core application.
The Startup class is a central part of an ASP.NET Core application, responsible for configuring services and the request pipeline.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example shows how to define and configure the Startup class in an ASP.NET Core application.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example illustrates adding middleware components in the Startup class.
Middleware components are used to handle requests and responses in the ASP.NET Core request pipeline. They can be used for logging, authentication, authorization, and more.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using System.Threading.Tasks;
namespace HostingExamples
{
public class RequestLoggingMiddleware
{
private readonly RequestDelegate _next;
public RequestLoggingMiddleware(RequestDelegate next)
{
_next = next;
}
public async Task InvokeAsync(HttpContext context)
{
Console.WriteLine($"Request: {context.Request.Method} {context.Request.Path}");
await _next(context);
}
}
public static class RequestLoggingMiddlewareExtensions
{
public static IApplicationBuilder UseRequestLogging(this IApplicationBuilder builder)
{
return builder.UseMiddleware<RequestLoggingMiddleware>();
}
}
}
This example demonstrates creating custom middleware in an ASP.NET Core application.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseRequestLogging();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example shows how to add built-in middleware components to the request pipeline.
ASP.NET Core has built-in support for dependency injection, making it easy to manage dependencies and improve testability.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public interface IMessageService
{
string GetMessage();
}
public class MessageService : IMessageService
{
public string GetMessage() => "Hello, Dependency Injection!";
}
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddSingleton<IMessageService, MessageService>();
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example illustrates setting up dependency injection in an ASP.NET Core application.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class CustomMiddleware
{
private readonly RequestDelegate _next;
private readonly IMessageService _messageService;
public CustomMiddleware(RequestDelegate next, IMessageService messageService)
{
_next = next;
_messageService = messageService;
}
public async Task InvokeAsync(HttpContext context)
{
await context.Response.WriteAsync(_messageService.GetMessage());
await _next(context);
}
}
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddSingleton<IMessageService, MessageService>();
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseMiddleware<CustomMiddleware>();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example demonstrates injecting services into controllers and middleware.
ASP.NET Core provides a flexible configuration system that can read settings from various sources, such as JSON files, environment variables, and command-line arguments.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Startup
{
private readonly IConfiguration _configuration;
public Startup(IConfiguration configuration)
{
_configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
var mySetting = _configuration["MySetting"];
Console.WriteLine($"MySetting: {mySetting}");
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example shows how to read configuration settings from a JSON file.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Startup
{
private readonly IConfiguration _configuration;
public Startup(IConfiguration configuration)
{
_configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
var mySetting = _configuration["MySetting"];
var envSetting = _configuration["EnvSetting"];
Console.WriteLine($"MySetting: {mySetting}, EnvSetting: {envSetting}");
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example demonstrates using environment variables and command-line arguments for configuration.
Logging is essential for diagnosing and troubleshooting issues in your application. ASP.NET Core provides a built-in logging framework that supports various logging providers.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
namespace HostingExamples
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILogger<Startup> logger)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
logger.LogInformation("Application is starting up");
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example illustrates configuring logging in an ASP.NET Core application.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
namespace HostingExamples
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILogger<Startup> logger)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
logger.LogInformation("Application is starting up");
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
logger.LogInformation("Application has started");
}
}
}
This example shows how to use different logging providers, such as Console and Debug.
Environment-based configuration allows you to define different settings for different environments, such as development, staging, and production.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Startup
{
private readonly IConfiguration _configuration;
public Startup(IConfiguration configuration)
{
_configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
var mySetting = _configuration["MySetting"];
Console.WriteLine($"MySetting: {mySetting}");
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example demonstrates setting up environment-based configuration in an ASP.NET Core application.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Startup
{
private readonly IConfiguration _configuration;
public Startup(IConfiguration configuration)
{
_configuration = configuration;
}
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
app.UseHsts();
}
var envSetting = _configuration["EnvSetting"];
Console.WriteLine($"EnvSetting: {envSetting}");
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example shows how to use environment variables to control application behavior.
Health checks allow you to monitor the health of your application and its dependencies. ASP.NET Core provides built-in support for health checks.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddHealthChecks();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
endpoints.MapHealthChecks("/health");
});
}
}
}
This example illustrates configuring health checks in an ASP.NET Core application.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Diagnostics.HealthChecks;
using Microsoft.Extensions.Hosting;
using System.Threading;
using System.Threading.Tasks;
namespace HostingExamples
{
public class CustomHealthCheck : IHealthCheck
{
public Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = default)
{
bool healthCheckResultHealthy = true;
if (healthCheckResultHealthy)
{
return Task.FromResult(HealthCheckResult.Healthy("The check indicates a healthy result."));
}
return Task.FromResult(HealthCheckResult.Unhealthy("The check indicates an unhealthy result."));
}
}
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddHealthChecks()
.AddCheck<CustomHealthCheck>("custom_health_check");
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
endpoints.MapHealthChecks("/health");
});
}
}
}
This example demonstrates creating custom health check logic.
Internet Information Services (IIS) is a popular web server for hosting ASP.NET Core applications. Learn how to configure and deploy your application on IIS.
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateWebHostBuilder(args).Build().Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.UseIISIntegration();
}
}
This example shows how to configure an ASP.NET Core application for hosting on IIS.
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateWebHostBuilder(args).Build().Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.UseIIS();
}
}
This example demonstrates deploying an ASP.NET Core application to IIS.
Kestrel is a cross-platform web server for ASP.NET Core applications. It is designed to be fast and lightweight.
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
webBuilder.UseKestrel(options =>
{
options.ListenAnyIP(5000); // Set the port for the Kestrel server
});
});
}
}
This example illustrates configuring Kestrel for hosting an ASP.NET Core application.
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
webBuilder.UseKestrel(options =>
{
options.AddServerHeader = false; // Remove the Server header from the response
});
});
}
}
This example shows how to customize Kestrel server options.
ASP.NET Core applications can be hosted on Linux using various servers, such as Nginx and Apache.
server {
listen 80;
server_name example.com;
location / {
proxy_pass http://localhost:5000;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection keep-alive;
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
}
This example demonstrates configuring Nginx to host an ASP.NET Core application on Linux.
<VirtualHost *:80>
ServerName example.com
ProxyPreserveHost On
ProxyPass / http://localhost:5000/
ProxyPassReverse / http://localhost:5000/
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>
This example shows how to set up Apache to host an ASP.NET Core application on Linux.
Microsoft Azure provides several options for hosting ASP.NET Core applications, including App Service, Virtual Machines, and Kubernetes.
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateWebHostBuilder(args).Build().Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.UseAzureAppServices();
}
}
This example illustrates deploying an ASP.NET Core application to Azure App Service.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
namespace HostingExamples
{
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
webBuilder.UseUrls("http://*:5000");
});
}
}
This example demonstrates hosting an ASP.NET Core application on an Azure Virtual Machine.
CI/CD pipelines automate the process of building, testing, and deploying your application. Tools like Azure DevOps and GitHub Actions can help streamline this process.
trigger:
- master
pool:
vmImage: 'ubuntu-latest'
variables:
buildConfiguration: 'Release'
steps:
- task: UseDotNet@2
inputs:
packageType: 'sdk'
version: '5.x'
installationPath: $(Agent.ToolsDirectory)/dotnet
- script: |
dotnet build --configuration $(buildConfiguration)
displayName: 'Build project'
- script: |
dotnet test --configuration $(buildConfiguration)
displayName: 'Run tests'
- task: PublishBuildArtifacts@1
inputs:
pathToPublish: '$(Build.ArtifactStagingDirectory)'
artifactName: 'drop'
publishLocation: 'Container'
This example illustrates setting up a CI/CD pipeline for an ASP.NET Core application using Azure DevOps.
name: CI/CD Pipeline
on:
push:
branches: [ master ]
pull_request:
branches: [ master ]
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
- name: Setup .NET Core
uses: actions/setup-dotnet@v1
with:
dotnet-version: 5.0.x
- name: Build with dotnet
run: dotnet build --configuration Release
- name: Test with dotnet
run: dotnet test --configuration Release
- name: Publish artifacts
uses: actions/upload-artifact@v2
with:
name: drop
path: |
**/bin/Release/netcoreapp*/publish/
This example demonstrates configuring a CI/CD pipeline with GitHub Actions.
Monitoring and diagnostics help you understand the performance and health of your application. ASP.NET Core provides tools for logging, tracing, and performance monitoring.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
namespace HostingExamples
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddApplicationInsightsTelemetry();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILogger<Startup> logger)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example shows how to configure logging and diagnostics in an ASP.NET Core application.
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace HostingExamples
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
services.AddApplicationInsightsTelemetry();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example illustrates using Application Insights for monitoring and diagnostics.
Load balancing distributes incoming network traffic across multiple servers to ensure reliability and performance. Learn how to configure load balancing for your ASP.NET Core application.
resource "azurerm_lb" "example" {
name = "exampleLoadBalancer"
location = azurerm_resource_group.example.location
resource_group_name = azurerm_resource_group.example.name
sku = "Standard"
frontend_ip_configuration {
name = "PublicIPAddress"
public_ip_address_id = azurerm_public_ip.example.id
}
backend_address_pool {
name = "BackendPool"
}
probes {
name = "httpGet"
protocol = "Http"
port = 80
request_path = "/"
interval_in_seconds = 5
number_of_probes = 2
}
load_balancing_rule {
name = "HTTP"
protocol = "Tcp"
frontend_port = 80
backend_port = 80
idle_timeout_in_minutes = 4
frontend_ip_configuration_name = "PublicIPAddress"
backend_address_pool_name = "BackendPool"
probe_name = "httpGet"
}
}
This example demonstrates setting up load balancing with Azure Load Balancer.
events {
worker_connections 1024;
}
http {
upstream backend {
server backend1.example.com;
server backend2.example.com;
}
server {
listen 80;
location / {
proxy_pass http://backend;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
}
}
}
This example shows how to configure load balancing using Nginx.
Scaling an application involves adjusting its resources to meet demand. Learn about horizontal and vertical scaling strategies for ASP.NET Core applications.
resource "azurerm_app_service_plan" "example" {
name = "example-appserviceplan"
location = azurerm_resource_group.example.location
resource_group_name = azurerm_resource_group.example.name
kind = "App"
reserved = true
sku {
tier = "Standard"
size = "S1"
}
properties {
per_site_scaling = false
number_of_sites = 1
}
}
resource "azurerm_app_service" "example" {
name = "example-appservice"
location = azurerm_resource_group.example.location
resource_group_name = azurerm_resource_group.example.name
app_service_plan_id = azurerm_app_service_plan.example.id
site_config {
always_on = true
}
app_settings = {
"WEBSITE_RUN_FROM_PACKAGE" = "1"
}
}
This example illustrates horizontal scaling using Azure App Service.
resource "azurerm_virtual_machine_scale_set" "example" {
name = "example-vmscaleset"
location = azurerm_resource_group.example.location
resource_group_name = azurerm_resource_group.example.name
upgrade_policy_mode = "Automatic"
sku {
name = "Standard_DS1_v2"
tier = "Standard"
capacity = 3
}
storage_profile_image_reference {
publisher = "Canonical"
offer = "UbuntuServer"
sku = "18.04-LTS"
version = "latest"
}
storage_profile_os_disk {
caching = "ReadWrite"
managed_disk_type = "Standard_LRS"
disk_size_gb = 30
}
os_profile {
computer_name_prefix = "examplevm"
admin_username = "adminuser"
admin_password = "Password123!"
}
network_profile {
name = "example"
primary = true
ip_configuration {
name = "internal"
primary = true
subnet_id = azurerm_subnet.example.id
}
}
health_probe_id = azurerm_lb_probe.example.id
}
This example demonstrates vertical scaling by adjusting the resources of an Azure Virtual Machine.
Security is crucial for protecting your application and data. Implement best practices for securing your ASP.NET Core application, including authentication, authorization, and data protection.
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authorization;
using Microsoft.Extensions.DependencyInjection;
namespace HostingExamples
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddAuthentication("CookieAuth")
.AddCookie("CookieAuth", config =>
{
config.Cookie.Name = "Grandmas.Cookie";
config.LoginPath = "/Home/Authenticate";
});
services.AddAuthorization(config =>
{
config.AddPolicy("Admin", policyBuilder =>
{
policyBuilder.RequireClaim("Admin");
});
});
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example demonstrates configuring authentication and authorization in an ASP.NET Core application.
using Microsoft.AspNetCore.DataProtection;
using Microsoft.Extensions.DependencyInjection;
namespace HostingExamples
{
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddDataProtection()
.PersistKeysToFileSystem(new DirectoryInfo(@"./keys"))
.ProtectKeysWithDpapi();
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
}
}
This example illustrates using ASP.NET Core Data Protection to secure sensitive data.
Containers provide a lightweight and portable way to deploy applications. Learn how to host your ASP.NET Core application in Docker containers.
# Dockerfile
FROM mcr.microsoft.com/dotnet/aspnet:5.0 AS base
WORKDIR /app
EXPOSE 80
FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build
WORKDIR /src
COPY ["MyApp/MyApp.csproj", "MyApp/"]
RUN dotnet restore "MyApp/MyApp.csproj"
COPY . .
WORKDIR "/src/MyApp"
RUN dotnet build "MyApp.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "MyApp.csproj" -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "MyApp.dll"]
This example shows how to create a Dockerfile for an ASP.NET Core application.
apiVersion: apps/v1
kind: Deployment
metadata:
name: myapp-deployment
spec:
replicas: 3
selector:
matchLabels:
app: myapp
template:
metadata:
labels:
app: myapp
spec:
containers:
- name: myapp
image: myregistry.azurecr.io/myapp:latest
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: myapp-service
spec:
type: LoadBalancer
ports:
- port: 80
targetPort: 80
selector:
app: myapp
This example demonstrates deploying an ASP.NET Core application in a Kubernetes cluster.