如何在VPS上配置Nginx实现多应用共享和负载均衡？

在VPS上配置Nginx实现多应用共享的完整指南

概述

主要配置步骤

详细操作流程

步骤1：准备VPS服务器

# 更新系统软件包
sudo apt-get update
sudo apt-get upgrade

步骤2：安装Nginx

# 在Ubuntu系统上安装Nginx
sudo apt-get install nginx
启动Nginx服务
sudo systemctl start nginx
sudo systemctl enable nginx

步骤3：配置虚拟主机

# 创建第一个应用配置文件
sudo nano /etc/nginx/sites-available/app1
配置文件内容示例
server {
    listen 80;
    servername app1.yourdomain.com;
    
    location / {
        proxypass http://localhost:3001;
        proxyhttpversion 1.1;
        proxysetheader Upgrade $httpupgrade;
        proxysetheader Connection 'upgrade';
        proxysetheader Host $host;
        proxycachebypass $httpupgrade;
    }
}

步骤4：设置反向代理和负载均衡

# 负载均衡配置示例
http {
    upstream backend {
        server backend1.example.com;
        server backend2.example.com;
        server backend3.example.com;
    }
    
    server {
        listen 80;
        location / {
            proxypass http://backend;
        }
    }
}

# 启用站点配置
sudo ln -s /etc/nginx/sites-available/app1 /etc/nginx/sites-enabled/
测试Nginx配置
sudo nginx -t
重启Nginx服务
sudo systemctl restart nginx