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

#修改配置文件為如下：
server {
    listen       80;
    server_name  localhost;

    location / {
        proxy_pass http://192.168.226.21;  # 設(shè)置代理目標(biāo)的地址
        proxy_redirect default;  # 開(kāi)啟默認(rèn)的代理重定向
        proxy_set_header Host $http_host;  # 設(shè)置代理請(qǐng)求中的 Host 頭部
        proxy_set_header X-Real-IP $remote_addr;  # 設(shè)置真實(shí)客戶(hù)端 IP 地址的頭部
        proxy_set_header REMOTE-HOST $remote_addr;  # 設(shè)置遠(yuǎn)程主機(jī)的頭部，此處與 X-Real-IP 重復(fù)了
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;  # 設(shè)置經(jīng)過(guò)的代理 IP 地址的頭部

        proxy_connect_timeout 30;  # 設(shè)置與后端服務(wù)器建立連接的超時(shí)時(shí)間為30秒
        proxy_send_timeout 60;  # 設(shè)置向后端服務(wù)器發(fā)送請(qǐng)求的超時(shí)時(shí)間為60秒
        proxy_read_timeout 60;  # 設(shè)置從后端服務(wù)器讀取響應(yīng)的超時(shí)時(shí)間為60秒

        proxy_buffering on;  # 開(kāi)啟代理緩沖
        proxy_buffer_size 32k;  # 設(shè)置單個(gè)緩沖區(qū)的大小為32KB
        proxy_buffers 4 128k;  # 設(shè)置用于存儲(chǔ)響應(yīng)數(shù)據(jù)的緩沖區(qū)的數(shù)量和大小
        proxy_busy_buffers_size 256k;  # 設(shè)置活躍緩沖區(qū)的最大大小為256KB
        proxy_max_temp_file_size 256k;  # 設(shè)置臨時(shí)文件的最大大小為256KB
    }

    error_page   500 502 503 504  /50x.html;  # 定義處理5xx錯(cuò)誤的頁(yè)面
    location = /50x.html {
        root   /usr/share/nginx/html;  # 指定50x錯(cuò)誤頁(yè)面的根目錄
    }
}

nginx -t

nginx -s reload

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

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

#修改配置文件為如下：
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

#對(duì)192.168.226.20修改
echo "webserver1" > /usr/share/nginx/html/index.html
systemctl restart nginx


#對(duì)192.168.226.21修改
echo "webserver2" > /usr/share/nginx/html/index.html
systemctl restart nginx


#對(duì)192.168.226.22修改
echo "webserver3" > /usr/share/nginx/html/index.html
systemctl restart nginx