Nginx Proxy 代理测试的实现

sudo tee /etc/yum.repos.d/nginx.repo << 'EOF'
[nginx-stable]
name=nginx stable repo
baseurl=https://nginx.org/packages/centos/$releasever/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://nginx.org/keys/nginx_signing.key

[nginx-mainline]
name=nginx mainline repo
baseurl=https://nginx.org/packages/mainline/centos/$releasever/$basearch/
gpgcheck=1
enabled=0
gpgkey=https://nginx.org/keys/nginx_signing.key
EOF

yum install -y nginx
systemctl enable --now nginx

vim /etc/nginx/conf.d/default.conf

#修改配置文件为如下：
server {
    listen       80;
    server_name  localhost;

    location / {
        proxy_pass http://192.168.226.21;  # 设置代理目标的地址
        proxy_redirect default;  # 开启默认的代理重定向
        proxy_set_header Host $http_host;  # 设置代理请求中的 Host 头部
        proxy_set_header X-Real-IP $remote_addr;  # 设置真实客户端 IP 地址的头部
        proxy_set_header REMOTE-HOST $remote_addr;  # 设置远程主机的头部，此处与 X-Real-IP 重复了
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;  # 设置经过的代理 IP 地址的头部

        proxy_connect_timeout 30;  # 设置与后端服务器建立连接的超时时间为30秒
        proxy_send_timeout 60;  # 设置向后端服务器发送请求的超时时间为60秒
        proxy_read_timeout 60;  # 设置从后端服务器读取响应的超时时间为60秒

        proxy_buffering on;  # 开启代理缓冲
        proxy_buffer_size 32k;  # 设置单个缓冲区的大小为32KB
        proxy_buffers 4 128k;  # 设置用于存储响应数据的缓冲区的数量和大小
        proxy_busy_buffers_size 256k;  # 设置活跃缓冲区的最大大小为256KB
        proxy_max_temp_file_size 256k;  # 设置临时文件的最大大小为256KB
    }

    error_page   500 502 503 504  /50x.html;  # 定义处理5xx错误的页面
    location = /50x.html {
        root   /usr/share/nginx/html;  # 指定50x错误页面的根目录
    }
}

nginx -t

nginx -s reload

tail -f /var/log/nginx/access.log

vim /etc/nginx/conf.d/default.conf

#修改配置文件为如下：
server {
    listen       80;
    server_name  localhost;

    location / {
        proxy_pass http://192.168.226.22;
        proxy_redirect default;
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header REMOTE-HOST $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        proxy_connect_timeout 30;
        proxy_send_timeout 60;
        proxy_read_timeout 60;

        proxy_buffering on;
        proxy_buffer_size 32k;
        proxy_buffers 4 128k;
        proxy_busy_buffers_size 256k;
        proxy_max_temp_file_size 256k;
    }
    error_page   500 502 503 504  /50x.html;
        location = /50x.html {
        root   /usr/share/nginx/html;
    }
}

nginx -t

nginx -s reload

tail -f /var/log/nginx/access.log

#对192.168.226.20修改
echo "webserver1" > /usr/share/nginx/html/index.html
systemctl restart nginx


#对192.168.226.21修改
echo "webserver2" > /usr/share/nginx/html/index.html
systemctl restart nginx


#对192.168.226.22修改
echo "webserver3" > /usr/share/nginx/html/index.html
systemctl restart nginx