一.实现前的准备
- 以下是实现简单负载均衡的思路，图中的服务器均为虚拟机
- 三台Linux服务器，一台用作Nginx负载均衡（192.168.254.139），另外两台用作Asp.Net Core应用程序承载的服务器（192.168.254.140，192.168.254.141）
- 一台用作于Client的Windows服务器。
二.环境搭建
1.Asp.Net Core程序
就是一个新建的空web应用程序，然后修改了下Startup的中间件，分别部署到2台Ubuntu上。
???public class Startup ???{ ???????// This method gets called by the runtime. Use this method to add services to the container. ???????// For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940 ???????public void ConfigureServices(IServiceCollection services) ???????{ ???????} ???????// 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(); ???????????} ???????????app.Run(async (context) => ???????????{ ???????????????//await context.Response.WriteAsync("this is first web application"); ???????????????await context.Response.WriteAsync("this is second web application"); ???????????}); ???????} ???}2.配置Nginx服务器
- 安装Nginx
- 在Ubuntu终端使用 sudo apt-get install nginx 命令安装Nginx。
- 然后通过 sudo service nginx start 命令启动服务
- 确认浏览器显示Nginx默认登录页。可在http://192.168.254.139/index.nginx-debian.html 访问登录页面。
- 配置Nginx
- 若要将 Nginx 配置为反向代理以将请求转接到 ASP.NET Core 应用，请修改 /etc/nginx/sites-available/default。 sudo vi /etc/nginx/sites-available/default
- 设置proxy_pass后面的参数
- 新增upstream，表示要转接的服务器集合，upstream后面的名字要与proxy_pass后面的参数相对应
- 修改完之后:wq保存，然后 sudo nginx -t 来验证配置文件的语法有没有错误，如果配置文件测试成功，可以通过运行 sudo nginx -s reload 强制 Nginx 选取更改
upstream cluster.com{ ???????server 192.168.254.140 weight=1; ???????server 192.168.254.141 weight=1;} ??????server { ???????listen 80 default_server; ???????# listen [::]:80 default_server deferred; ???????# SSL configuration ???????# ???????# listen 443 ssl default_server; ???????# listen [::]:443 ssl default_server; ???????# ???????# Note: You should disable gzip for SSL traffic. ???????# See: https://bugs.debian.org/773332 ???????# ???????# Read up on ssl_ciphers to ensure a secure configuration. ???????# See: https://bugs.debian.org/765782 ???????# ???????# Self signed certs generated by the ssl-cert package ???????# Don‘t use them in a production server! ???????# ???????# include snippets/snakeoil.conf; ???????root /var/www/html; ???????# Add index.php to the list if you are using PHP ???????index index.html index.htm index.nginx-debian.html; ???????server_name _example.com *.example.com; ???????location / { ???????????????proxy_pass ????????http://cluster.com; ???????????????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; ???????????????# First attempt to serve request as file, then ???????????????# as directory, then fall back to displaying a 404. ???????????????try_files $uri $uri/ =404; ???????} ???????# pass PHP scripts to FastCGI server ???????# ???????#location ~ \.php$ { ???????# ??????include snippets/fastcgi-php.conf; ???????# ???????# ??????# With php-fpm (or other unix sockets): ???????# ??????fastcgi_pass unix:/var/run/php/php7.0-fpm.sock; ???????# ??????# With php-cgi (or other tcp sockets): ???????# ??????fastcgi_pass 127.0.0.1:9000; ???????#} ???????# deny access to .htaccess files, if Apache‘s document root ???????# concurs with nginx‘s one ???????# ???????#location ~ /\.ht { ???????# ??????deny all; ???????#}}2.Client控制台应用程序
???class Program ???{ ???????static void Main(string[] args) ???????{ ???????????HttpClient httpClient = new HttpClient(); ???????????for (int i = 0; i < 1000; i++) ???????????{ ???????????????string result = httpClient.GetStringAsync("http://192.168.254.139").Result; ???????????????Console.WriteLine(result); ???????????} ???????????Console.ReadKey(); ???????} ???}结果如下：
由结果可知，Nginx服务器会根据我们配置Nginx时的权重进行转向，到现在，一个简单的集群已经搭建。
Ubuntu-18.04 下使用Nginx搭建高可用，高并发的asp.net core集群
原文地址：https://www.cnblogs.com/hhzblogs/p/9818099.html