NetCore在Centos7上部署和Nginx集群部署访问

NetCore在Linux上部署

工具：WMWare虚拟机，Wmware12，CentOS7ISO镜像，VS2017

1、安装虚拟机，过程略，网上一搜一大把

2、用VS2017建一个NetCore的Web项目，用命令行生成也可以，然后发布

3、搭建Linux下的NetCore运行环境

　　Linux下访问这个网站：https://www.microsoft.com/net/download/windows

　　

　　点击红色的部分，然后跳转到另一个页面，同时下载文件

　　

　　按照上面的步骤配置好NetCore SDK。（个人认为使用Binaries方式简单些，如果你想换另一种方式，我没有异议）

4、windows下的发布包直接复制到主文件夹里面（home目录），然后进入复制过来的发布目录下，直接dotnet 项目名称.dll就可以访问5000端口了。

5、如果出现错误，请自己排查，大部分都是NetCore版本问题，也就是你VS生成的项目的NetCore版本和Linux上NetCore的版本不匹配

Nginx集群部署

1、这就需要在Home/Index文件上动手脚了，下面是我的代码

using Cluster.Models;
using Microsoft.AspNetCore.Mvc;
using System.Diagnostics;

namespace Cluster.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {
            ViewBag.RemoteIpAddress = Request.HttpContext.Connection.RemoteIpAddress;
            ViewBag.Header = Request.Headers["X-Forwarded-For"];
            ViewBag.LocalIpAddress = HttpContext.GetClientUserIp();
            ViewBag.RequestHeaders = Request.Headers;
            return View();
        }

        public IActionResult About()
        {
            ViewData["Message"] = "Your application description page.";

            return View();
        }

        public IActionResult Contact()
        {
            ViewData["Message"] = "Your contact page.";

            return View();
        }

        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }
}

using Microsoft.AspNetCore.Http;
using System.Linq;

namespace Cluster.Models
{
    public static class IPExtension
    {
        public static string GetClientUserIp(this HttpContext context)
        {
            var ip = context.Request.Headers["X-Forwarded-For"].FirstOrDefault();
            if (string.IsNullOrEmpty(ip))
            {
                ip = context.Connection.LocalIpAddress.ToString();
            }

            return ip;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;

namespace Cluster
{
    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.AddMvc();
        }

        // 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.UseBrowserLink();
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }
            //添加转发设置
            app.UseForwardedHeaders(new ForwardedHeadersOptions {
                ForwardedHeaders = Microsoft.AspNetCore.HttpOverrides.ForwardedHeaders.XForwardedFor | Microsoft.AspNetCore.HttpOverrides.ForwardedHeaders.XForwardedProto
            });
            app.UseStaticFiles();

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

@{
    ViewData["Title"] = "Home Page";
}

客户端：<br />
Request.HttpContext获取访问ip： @ViewBag.RemoteIpAddress
<br />
Request.Headers获取访问ip：@ViewBag.Header
<br />
服务端：<br />
Request.HttpContext获取响应服务所在服务器的ip：@ViewBag.LocalIpAddress
<table class="table">
    <thead>
        <tr>
            <th>key</th>
            <th>value</th>
        </tr>
    </thead>
    <tbody>
        @foreach (var item in ViewBag.RequestHeaders)
        {
            <tr>
                <td>@item.Key</td>
                <td>@item.Value</td>
            </tr>
        }
    </tbody>
</table>

我的是：Windows下把发布包挂到了IIS上，然后有个访问地址，Linux下直接dotnet命令启动，还是本地访问，所以上面的代码，对我来说没啥用

2、Linux安装Nginx，Nginx作为反向代理服务器会把接受的请求转发给对应的Server，不过是随机的，Nginx安装过程略

3、修改Nginx配置文件

#集群站点配置
upstream xxx.services{
    server IP地址1:端口1 fail_timeout=60s;
    server IP地址2:端口2 fail_timeout=60s;
}

server {
    #代理监听端口
    listen 80 default_server;
    listen [::]:80 default_server;

    root /var/www/html;

    server_name _;   #_默认ip+端口访问，_可以替换成访问域名如：shenniu.core.com
    #缓存文件路由
    location ~ .*(.(js|css|jpg|svg)).* {

        proxy_pass http://shenniu.services;
        proxy_cache_valid 200;
        proxy_cache my_cache;
        expires 3d;
    }
    #集群站点路由
    location / {

        proxy_pass http://xxx.services;  
        #对应upstream后面的名称
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade; 
        proxy_set_header Connection keep-alive;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_cache_bypass $http_upgrade;

        proxy_set_header X-Forwarded-For 
        $proxy_add_x_forwarded_for;
    }
}

注意用Root用户修改，有的Nginx.Conf文件是只读的，修改完之后 Nginx -r reload一下

然后访问Nginx吧，不出意外的话你就可以看到效果了

备注：部署集群是为了提高性能的，Nginx作为一个反向代理服务器在集群部署方面还是很不错的