从0开始搭建nginx负载均衡配置

1、安装nginx

yum -y install nginx

2、开启自启

sudo systemctl start nginx.service
sudo systemctl enable nginx.service

3、解析域名到当前负载均衡服务器 (我的域名是 kanketang.cn)

4、编辑nginx配置文件

vim /etc/nginx/nginx.conf

5、在另外两台服务器搭建站点绑定域名，下面是负载均衡服务器配置

upstream  kanketang.cn {
     server   172.17.60.142;  # A服务器内网ip
     server   172.17.60.143;  # B服务器内网ip
}
upstream  www.kanketang.cn {
     server   172.17.60.142;
     server   172.17.60.143;
}

6、反向代理

 location / {
            proxy_pass http://$host;
            proxy_connect_timeout 2s;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
        }

7、ssl证书

 server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        listen       443 ssl;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        ssl_protocols TLSv1.2 TLSv1.1 TLSv1;
        ssl_certificate /etc/ssl/kanketang.crt;
        ssl_certificate_key /etc/ssl/kanketang.key;
        ssl_prefer_server_ciphers on;
   
        #自动跳转到HTTPS
        if ($server_port = 80) {
            rewrite ^(.*)$ https://$host$1 permanent;
        }

8、完整nginx配置文件

# For more information on configuration, see:
#   * Official English Documentation: http://nginx.org/en/docs/
#   * Official Russian Documentation: http://nginx.org/ru/docs/

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;

events {
    worker_connections 2048;
}

http {
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

    # Load modular configuration files from the /etc/nginx/conf.d directory.
    # See http://nginx.org/en/docs/ngx_core_module.html#include
    # for more information.
    include /etc/nginx/conf.d/*.conf;
   
   
    upstream  kanketang.cn {
        server   172.17.60.142;
        server   172.17.60.143;
    }

    upstream  www.kanketang.cn {
        server   172.17.60.142;
        server   172.17.60.143;
    }
    
    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        listen       443 ssl;
        server_name  _;
        root         /usr/share/nginx/html;

        # Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;


        ssl_protocols TLSv1.2 TLSv1.1 TLSv1;
    ssl_certificate /etc/ssl/kanketang.crt;
    ssl_certificate_key /etc/ssl/kanketang.key;
    ssl_prefer_server_ciphers on;
   
        #自动跳转到HTTPS
    if ($server_port = 80) {
        rewrite ^(.*)$ https://$host$1 permanent;
    }

        location / {
            proxy_pass http://$host;
            proxy_connect_timeout 2s;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }

# Settings for a TLS enabled server.
#
#    server {
#        listen       443 ssl http2 default_server;
#        listen       [::]:443 ssl http2 default_server;
#        server_name  _;
#        root         /usr/share/nginx/html;
#
#        ssl_certificate "/etc/pki/nginx/server.crt";
#        ssl_certificate_key "/etc/pki/nginx/private/server.key";
#        ssl_session_cache shared:SSL:1m;
#        ssl_session_timeout  10m;
#        ssl_ciphers HIGH:!aNULL:!MD5;
#        ssl_prefer_server_ciphers on;
#
#        # Load configuration files for the default server block.
#        include /etc/nginx/default.d/*.conf;
#
#        location / {
#        }
#
#        error_page 404 /404.html;
#            location = /40x.html {
#        }
#
#        error_page 500 502 503 504 /50x.html;
#            location = /50x.html {
#        }
#    }

}

9、访问域名多刷新测试

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