前言

Nginx有负载均衡功能，实验目的是搭建一个Nginx作为应用负载入口，Nginx后面不同的项目需要实现访问此ip能够负载到不同项目，并且在不同项目中做负载。

实验环境

ip 主机名 系统
192.168.198.106 nginx-proxy Rocky Linux release 8.8
192.168.198.107 p1a Rocky Linux release 8.8
192.168.198.108 p1b Rocky Linux release 8.8
192.168.198.109 p2a Rocky Linux release 8.8
192.168.198.110 p2b Rocky Linux release 8.8

环境准备

nginx-proxy，直接通过yum安装nginx，其他nginx安装方式请看《Nginx离线部署》文章

[root@nginx-proxy ~]# yum install -y nginx
#启动nginx
[root@nginx-proxy ~]# systemctl status nginx
● nginx.service - The nginx HTTP and reverse proxy server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
   Active: inactive (dead)

11月 13 08:37:50 nginx-proxy systemd[1]: nginx.service: Unit cannot be reloaded because it is inactive
[root@nginx-proxy ~]# systemctl start nginx
[root@nginx-proxy ~]# systemctl status nginx
● nginx.service - The nginx HTTP and reverse proxy server
   Loaded: loaded (/usr/lib/systemd/system/nginx.service; disabled; vendor preset: disabled)
   Active: active (running) since Wed 2024-11-13 08:39:53 EST; 13s ago
  Process: 30632 ExecStart=/usr/sbin/nginx (code=exited, status=0/SUCCESS)
  Process: 30631 ExecStartPre=/usr/sbin/nginx -t (code=exited, status=0/SUCCESS)
  Process: 30629 ExecStartPre=/usr/bin/rm -f /run/nginx.pid (code=exited, status=0/SUCCESS)
 Main PID: 30634 (nginx)
    Tasks: 2 (limit: 4497)
   Memory: 6.8M
   CGroup: /system.slice/nginx.service
           ├─30634 nginx: master process /usr/sbin/nginx
           └─30635 nginx: worker process

11月 13 08:39:52 nginx-proxy systemd[1]: Starting The nginx HTTP and reverse proxy server...
11月 13 08:39:52 nginx-proxy nginx[30631]: nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
11月 13 08:39:52 nginx-proxy nginx[30631]: nginx: configuration file /etc/nginx/nginx.conf test is successful
11月 13 08:39:53 nginx-proxy systemd[1]: nginx.service: Failed to parse PID from file /run/nginx.pid: Invalid argument
11月 13 08:39:53 nginx-proxy systemd[1]: Started The nginx HTTP and reverse proxy server.
#设置开机自动启动
[root@nginx-proxy ~]# systemctl enable nginx.service 
Created symlink /etc/systemd/system/multi-user.target.wants/nginx.service → /usr/lib/systemd/system/nginx.service.

配置四台主机，使用httpd服务搭建简单的http服务器，四台操作相同，就是在配置页面的时候不同

[root@p1a ~]# yum install httpd -y
#配置开机自启并启动
[root@p1b ~]# systemctl enable httpd --now
#关闭防火墙
[root@p1a html]# systemctl stop firewalld.service && systemctl disable firewalld.service
#关闭selinux，临时关闭
[root@nginx-proxy ~]# setenforce 0

#配置页面
[root@p2b ~]# echo "hello Im is `hostname`" > /var/www/html/index.html

#测试页面访问
[root@p2b ~]# curl http://192.168.198.107

配置Nginx

#进入到nginx配置文件夹下
[root@nginx-proxy conf.d]# cd /etc/nginx/conf.d/
#添加nginx配置
[root@nginx-proxy conf.d]# cat project_a.conf
upstream pa {
        server 192.168.198.107:80;
        server 192.168.198.108:80;
}
server {
        #端口要在1000以上，我测试用101，浏览器一直访问不了
        listen 1000;
        server_name  localhost;
        location / {
        proxy_pass http://pa;
        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;
                                                                        }
}
[root@nginx-proxy conf.d]# cat project_b.conf 
upstream pb {
        server 192.168.198.109:80;
        server 192.168.198.110:80;
}
server {
        listen 192.168.198.106:1001;
        location / {
        proxy_pass http://pb;
        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;
                                                                        }
}
[root@nginx-proxy conf.d]# nginx -t
[root@nginx-proxy conf.d]# nginx -s reload

验证功能实现

标签: linux