Nginx实现动静分离

简介：

环境说明：

系统	IP	服务
CentOS8 调度器 DR	192.168.220.9	Nginx nginx-1.20.1.tar.gz
CentOS8 动态页面处理 Dynamic(动态)	192.168.220.10	LNMP nginx-1.20.1.tar.gz mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz php-8.0.10.tar.gz
CentOS8 静态页面处理 Static(静态)	192.168.220.17	httpd apr-1.7.0.tar.gz apr-util-1.6.1.tar.gz httpd-2.4.48.tar.gz

关闭三台防火墙和selinux，改名

# DR
[root@localhost ~]# systemctl disable --now firewalld
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.[root@localhost ~]# sed -ri 's/(SELINUX=).*/\1disabled/g' /etc/selinux/config
[root@localhost ~]# setenforce 0
[root@localhost ~]# getenforce 
Permissive
[root@localhost ~]# hostnamectl set-hostname DR
[root@localhost ~]# bash
[root@DR ~]## Dynamic
[root@localhost ~]# systemctl disable --now firewalld
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@localhost ~]# sed -ri 's/(SELINUX=).*/\1disabled/g' /etc/selinux/config[root@localhost ~]# setenforce 0
[root@localhost ~]# getenforce 
Permissive
[root@localhost ~]# hostnamectl set-hostname Dynamic
[root@localhost ~]# bash
[root@Dynamic ~]## Static
[root@localhost ~]# systemctl disable --now firewalld
Removed /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@localhost ~]# sed -ri 's/(SELINUX=).*/\1disabled/g' /etc/selinux/config[root@localhost ~]# setenforce 0
[root@localhost ~]# getenforce
Permissive
[root@localhost ~]# hostnamectl set-hostname Static
[root@localhost ~]# bash
[root@Static ~]#

DR上安装Nginx

# 安装***Nginx***    
# 安装依赖包和工具包
[root@DR ~]# yum -y install pcre-devel openssl openssl-devel gd-devel gcc gcc-c++ make wget
[root@DR ~]# yum -y group mark install "Development Tools"# 创建用户
[root@DR ~]# useradd -r -M -s /sbin/nologin nginx# 创建日志存放目录
[root@DR ~]# mkdir /var/log/nginx -p# 下载nginx，解压
root@DR ~]# mkdir /usr/src/soft
[root@DR ~]# cd /usr/src/soft/
[root@DR soft]# wget http://nginx.org/download/nginx-1.20.1.tar.gz
[root@DR soft]# ls
nginx-1.20.1.tar.gz
[root@DR soft]# tar xf nginx-1.20.1.tar.gz -C /usr/local/# 编译安装Nginx
[root@DR soft]# cd /usr/local/nginx-1.20.1/
[root@DR nginx-1.20.1]#./configure --prefix=/usr/local/nginx --user=nginx --group=nginx --with-debug --with-http_ssl_module --with-http_realip_module --with-http_image_filter_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_stub_status_module --http-log-path=/var/log/nginx/access.log --error-log-path=/var/log/nginx/error.log
......[root@DR nginx-1.20.1]# make && make install
......# 配置环境变量
[root@DR nginx-1.20.1]# echo "export PATH=/usr/local/nginx/sbin:$PATH" > /etc/profile.d/nginx.sh
[root@DR nginx-1.20.1]# which nginx
/usr/local/nginx/sbin/nginx# 尝试启动Nginx
[root@DR nginx-1.20.1]# /usr/local/nginx/sbin/nginx 
[root@DR nginx-1.20.1]# ss -antl
State     Recv-Q    Send-Q       Local Address:Port         Peer Address:Port    Process    
LISTEN    0         128                0.0.0.0:22                0.0.0.0:*                  
LISTEN    0         128                0.0.0.0:80(Nginx默认端口)                0.0.0.0:*                  
LISTEN    0         128                   [::]:22                   [::]:*# 设置开机自启
[root@DR nginx-1.20.1]# cd /usr/lib/systemd/system/
[root@DR system]# cp sshd.service nginxd.service
[root@DR system]# vi nginxd.service
[Unit]
Description=Nginx server daemon
After=network.target[Service]
Type=forking
ExecStart=/usr/local/nginx/sbin/nginx
ExecStop=/usr/local/nginx/sbin/nginx -s stop
ExecReload=/usr/local/nginx/sbin/nginx -s reload
KillMode=process[Install]
WantedBy=multi-user.target[root@DR system]# /usr/local/nginx/sbin/nginx -s stop
[root@DR system]# systemctl daemon-reload
[root@DR system]# systemctl start nginxd.service
[root@DR system]# ss -antl
State     Recv-Q    Send-Q       Local Address:Port         Peer Address:Port    Process    
LISTEN    0         128                0.0.0.0:22                0.0.0.0:*                  
LISTEN    0         128                0.0.0.0:80                0.0.0.0:*                  
LISTEN    0         128                   [::]:22                   [::]:*

访问页面是否正常

Dynamic安装LNMP

# Nginx安装与上面安装步骤一样，这里就省略，直接安装MySQL和PHP
# 安装***Mysql*** 
# 下载MySQL和工具  
yum -y install wget ncurses-compat-libswget https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz[root@Dynamic ~]# ls /usr/src/soft/
mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz# 创建用户
[root@Dynamic]# useradd -r -M -s /sbin/nologin mysql# 解压
[root@Dynamic ~]# cd /usr/src/soft/
[root@Dynamic soft]# ls
mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz  nginx-1.20.1.tar.gz  [root@Dynamic soft]# tar xf mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz -C /usr/local/# 创建软连接
[root@Dynamic soft]# cd /usr/local/
[root@Dynamic local]# ls
bin  games    lib    libexec                              nginx         sbin   src
etc  include  lib64  mysql-5.7.34-linux-glibc2.12-x86_64  nginx-1.20.1  share[root@Dynamic local]# ln -sv  mysql-5.7.34-linux-glibc2.12-x86_64 mysql
'mysql' -> 'mysql-5.7.34-linux-glibc2.12-x86_64'
[root@Dynamic local]# ll
total 0
......
lrwxrwxrwx.  1 root root  35 Oct 29 02:58 mysql -> mysql-5.7.34-linux-glibc2.12-x86_64
drwxr-xr-x.  9 root root 129 Oct 29 02:57 mysql-5.7.34-linux-glibc2.12-x86_64
drwxr-xr-x. 11 root root 151 Oct 29 02:56 nginx
drwxr-xr-x.  9 1001 1001 186 Oct 29 02:56 nginx-1.20.1
.......# 修改属主
root@Dynamic local]# chown -R mysql.mysql /usr/local/mysql*
[root@Dynamic local]# ll
total 0
......
lrwxrwxrwx.  1 mysql mysql  35 Oct 29 02:58 mysql -> mysql-5.7.34-linux-glibc2.12-x86_64
drwxr-xr-x.  9 mysql mysql 129 Oct 29 02:57 mysql-5.7.34-linux-glibc2.12-x86_64
drwxr-xr-x. 11 root  root  151 Oct 29 02:56 nginx
drwxr-xr-x.  9  1001  1001 186 Oct 29 02:56 nginx-1.20.1
.......# 创建存放数据目录并修改属组
[root@Dynamic local]# mkdir /opt/data
[root@Dynamic local]# chown -R mysql.mysql /opt/data/
[root@Dynamic local]# ll /opt/
total 0
drwxr-xr-x. 2 mysql mysql 6 Oct 29 03:02 data# 添加环境变量
[root@Dynamic local]# which mysql
/usr/bin/which: no mysql in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin)
[root@Dynamic local]# echo "PATH=/usr/local/mysql/bin:$PATH" > /etc/profile.d/mysql.sh
[root@Dynamic local]# bash
[root@Dynamic local]# which mysql
/usr/local/mysql/bin/mysql# 初始化数据库不要密码
[root@Dynamic local]# cd
[root@Dynamic ~]# /usr/local/mysql/bin/mysqld --initialize-insecure --user=mysql --datadir=/opt/data
2021-10-29T07:07:05.689651Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
......
2021-10-29T07:07:06.619196Z 1 [Warning] root@localhost is created with an empty password ! Please consider switching off the --initialize-insecure option.# 创建配置文件
[root@Dynamic ~]# vi /etc/my.cnf
[mysqld]
datadir = /opt/data
basedir = /usr/local/mysql
port=3306
socket = /tmp/mysql.sock
pid-file = /opt/data/mysql.pid
skip-name-resolve# 修改支持文件
[root@Dynamic ~]# vi /usr/local/mysql/support-files/mysql.server
......
46 basedir=/usr/local/mysql   # 安装MySQL的位置
47 datadir=/opt/data          # 数据存放目录
.......# 尝试启动MySQL
[root@Dynamic ~]# /usr/local/mysql/support-files/mysql.server start
Starting MySQL.Logging to '/opt/data/Dynamic.err'.SUCCESS! 
[root@Dynamic ~]# ss -antl
State     Recv-Q    Send-Q       Local Address:Port         Peer Address:Port    Process    
LISTEN    0         128                0.0.0.0:80                0.0.0.0:*                  
LISTEN    0         128                0.0.0.0:22                0.0.0.0:*                  
LISTEN    0         80                       *:3306(MySQL默认端口)                    *:*                  
LISTEN    0         128                   [::]:22                   [::]:*# 登录MySQL并设置密码
[root@Dynamic ~]# mysql
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 2
Server version: 5.7.34 MySQL Community Server (GPL)Copyright (c) 2000, 2021, Oracle and/or its affiliates.Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> set password = password('123456');                 # 给MySQL密码设置
Query OK, 0 rows affected, 1 warning (0.00 sec)mysql> exit
Bye 
[root@Dynamic ~]# mysql -uroot -p123456                   # 使用新密码登录
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.34 MySQL Community Server (GPL)Copyright (c) 2000, 2021, Oracle and/or its affiliates.Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> exit
Bye# 设置MySQL开启自启
[root@Dynamic ~]# cd /usr/lib/systemd/system/
[root@Dynamic system]# cp nginxd.service mysqld.service
[root@Dynamic system]# vim mysqld.service
[Unit]
Description=MySQL server daemon
After=network.target[Service]
Type=forking
ExecStart=/usr/local/mysql/support-files/mysql.server start
ExecStop=/usr/local/mysql/support-files/mysql.server stop
ExecReload=/bin/kill -HUP[Install]
WantedBy=multi-user.target[root@Dynamic system]# /usr/local/mysql/support-files/mysql.server stop
Shutting down MySQL.. SUCCESS! 
[root@Dynamic system]# systemctl daemon-reload
[root@Dynamic system]# systemctl start mysqld.service
[root@Dynamic system]# ss -antl
State     Recv-Q    Send-Q       Local Address:Port         Peer Address:Port    Process    
LISTEN    0         128                0.0.0.0:80                0.0.0.0:*                  
LISTEN    0         128                0.0.0.0:22                0.0.0.0:*                  
LISTEN    0         80                       *:3306                    *:*                  
LISTEN    0         128                   [::]:22                   [::]:*# 安装***PHP***
# 下载依托源
[root@Dynamic ~]# yum -y install epel-release# 下载依赖包
[root@Dynamic ~]# yum -y install sqlite-devel libzip-devel libxml2 libxml2-devel openssl openssl-devel bzip2 bzip2-devel libcurl libcurl-devel libicu-devel libjpeg libjpeg-devel libpng libpng-devel openldap-devel pcre-devel freetype freetype-devel gmp gmp-devel libmcrypt libmcrypt-devel readline readline-devel libxslt libxslt-devel mhash mhash-devel[root@Dynamic ~]# yum -y install http://mirror.centos.org/centos/8-stream/PowerTools/x86_64/os/Packages/oniguruma-devel-6.8.2-2.el8.x86_64.rpm# 下载PHP
[root@Dynamic ~]# cd /usr/src/soft/
[root@Dynamic soft]# wget https://www.php.net/distributions/php-8.0.10.tar.gz
[root@Dynamic soft]# ls
mysql-5.7.34-linux-glibc2.12-x86_64.tar.gz  nginx-1.20.1.tar.gz  php-8.0.10.tar.gz# 解压PHP
[root@Dynamic soft]# tar xf php-8.0.10.tar.gz -C /usr/local/# 编译安装PHP
[root@Dynamic soft]# cd /usr/local/
[root@Dynamic local]# ls
bin  games    lib    libexec  mysql-5.7.34-linux-glibc2.12-x86_64  nginx-1.20.1  sbin   src
etc  include  lib64  mysql    nginx                                php-8.0.10    share[root@Dynamic local]# cd php-8.0.10
[root@Dynamic php-8.0.10]# ./configure --prefix=/usr/local/php8  \
--with-config-file-path=/etc \
--enable-fpm \
--disable-debug \
--disable-rpath \
--enable-shared \
--enable-soap \
--with-openssl \
--enable-bcmath \
--with-iconv \
--with-bz2 \
--enable-calendar \
--with-curl \
--enable-exif  \
--enable-ftp \
--enable-gd \
--with-jpeg \
--with-zlib-dir \
--with-freetype \
--with-gettext \
--enable-mbstring \
--enable-pdo \
--with-mysqli=mysqlnd \
--with-pdo-mysql=mysqlnd \
--with-readline \
--enable-shmop \
--enable-simplexml \
--enable-sockets \
--with-zip \
--enable-mysqlnd-compression-support \
--with-pear \
--enable-pcntl \
--enable-posix
.......
+--------------------------------------------------------------------+
| License:                                                           |
| This software is subject to the PHP License, available in this     |
| distribution in the file LICENSE. By continuing this installation  |
| process, you are bound by the terms of this license agreement.     |
| If you do not agree with the terms of this license, you must abort |
| the installation process at this point.                            |
+--------------------------------------------------------------------+Thank you for using PHP.[root@Dynamic php-8.0.10]# make
......
[root@Dynamic php-8.0.10]# make install
......# 添加环境变量
[root@Dynamic php-8.0.10]# echo "PATH=/usr/local/php8/bin:$PATH" > /etc/profile.d/php.sh
[root@Dynamic php-8.0.10]# bash
[root@Dynamic php-8.0.10]# which php
/usr/local/php8/bin/php# 配置php-fpm
[root@Dynamic php-8.0.10]# cp php.ini-production /etc/php.ini
[root@Dynamic php-8.0.10]# cd sapi/
[root@Dynamic sapi]# cd fpm/
[root@Dynamic fpm]# cp init.d.php-fpm /etc/init.d/php-fpm
[root@Dynamic fpm]# pwd
/usr/local/php-8.0.10/sapi/fpm
[root@Dynamic fpm]# chmod +x /etc/init.d/php-fpm[root@Dynamic fpm]# cd /usr/local/php8/
[root@Dynamic php8]# ls
bin  etc  include  lib  php  sbin  var
[root@Dynamic php8]# cd etc/
[root@Dynamic etc]# cp php-fpm.conf.default php-fpm.conf
[root@Dynamic etc]# ls
pear.conf  php-fpm.conf  php-fpm.conf.default  php-fpm.d
[root@Dynamic etc]# cd php-fpm.d
[root@Dynamic php-fpm.d]# ls
www.conf.default
[root@Dynamic php-fpm.d]# cp www.conf.default www.conf
[root@Dynamic php-fpm.d]# ls
www.conf  www.conf.default# 尝试启动php
[root@Dynamic php-fpm.d]# service php-fpm start
Starting php-fpm  done
[root@Dynamic php-fpm.d]# ss -antl
State     Recv-Q    Send-Q       Local Address:Port         Peer Address:Port    Process    
LISTEN    0         128              127.0.0.1:9000(php默认端口)              0.0.0.0:*                  
LISTEN    0         128                0.0.0.0:80                0.0.0.0:*                  
LISTEN    0         128                0.0.0.0:22                0.0.0.0:*                  
LISTEN    0         80                       *:3306                    *:*                  
LISTEN    0         128                   [::]:22                   [::]:*

让Nginx支持PHP

[root@Dynamic php-fpm.d]# vim  /usr/local/nginx/conf/nginx.conf
......43         location / {     44             root   html;45             index  index.php index.html index.htm;  # 添加index.php46         }
......65         location ~ \.php$ {                         # 把这几行取消注释66             root           html;67             fastcgi_pass   127.0.0.1:9000;68             fastcgi_index  index.php;69             fastcgi_param  SCRIPT_FILENAME  $Document_root$fastcgi_script_name;    # 修改70             include        fastcgi_params;71         }
......# 添加index.php
[root@Dynamic php-fpm.d]# cd /usr/local/nginx/html/
[root@Dynamic html]# ls
50x.html  index.html
[root@Dynamic html]# vi index.php
<?phpphpinfo();
?>[root@Dynamic php-fpm.d]# /usr/local/nginx/sbin/nginx -s reload

访问页面是否正常

Static安装httpd

# 安装***httpd***  
# 下载工具包   
[root@Static soft]# yum groups mark install 'Development Tools'# 创建用户
[root@Static soft]# useradd -r -M -s /sbin/nologin apache# 安装依赖包
[root@Static soft]# yum -y install openssl-devel pcre-devel expat-devel libtool gcc gcc-c++ make wget[root@Static ~]# mkdir /usr/src/soft
[root@Static ~]# cd /usr/src/soft/
# 下载apr包 apache.org
wget https://downloads.apache.org/apr/apr-1.7.0.tar.gz
# 下载apr-util包
wget https://downloads.apache.org/apr/apr-util-1.6.1.tar.gz
# 下载httpd包
wget https://downloads.apache.org/httpd/httpd-2.4.48.tar.gz[root@Static soft]# ls
apr-1.7.0.tar.gz  apr-util-1.6.1.tar.gz  httpd-2.4.48.tar.gz# 解压
[root@Static soft]# tar xf apr-1.7.0.tar.gz -C /usr/local/
[root@Static soft]# tar xf apr-util-1.6.1.tar.gz  -C /usr/local/
[root@Static soft]# tar xf httpd-2.4.48.tar.gz  -C /usr/local/# 编译安装apr
[root@Static soft]# cd /usr/local/apr-1.7.0/
[root@Static apr-1.7.0]# vi configure
......
31879     trap "$RM \"$cfgfile\"; exit 1" 1 2 15
31880    #  $RM "$cfgfile"  # 注释掉或删除
......
[root@Static apr-1.7.0]# ./configure --prefix=/usr/local/apr
......
[root@Static apr-1.7.0]# make && make install
......# 编译安装apr-util
[root@Static apr-1.7.0]# cd ../apr-util-1.6.1/
[root@Static apr-util-1.6.1]# ./configure --prefix=/usr/local/apr-util --with-apr=/usr/local/apr
......
[root@Static apr-util-1.6.1]# make && make install
.......# 编译安装httpd
[root@Static apr-util-1.6.1]# cd ../httpd-2.4.48/
[root@Static httpd-2.4.48]# ./configure --prefix=/usr/local/apache \
--enable-so \
--enable-ssl \
--enable-cgi \
--enable-rewrite \
--with-zlib \
--with-pcre \
--with-apr=/usr/local/apr \
--with-apr-util=/usr/local/apr-util/ \
--enable-modules=most \
--enable-mpms-shared=all \
--with-mpm=prefork
......
Server Version: 2.4.48Install prefix: /usr/local/apacheC compiler:     gccCFLAGS:          -g -O2 -pthread  CPPFLAGS:        -DLINUX -D_REENTRANT -D_GNU_SOURCE  LDFLAGS:           LIBS:             C preprocessor: gcc -E[root@Static httpd-2.4.48]# make && make install
.......# 配置环境变量
[root@Static httpd-2.4.48]# echo "export PATH=/usr/local/apache/bin:$PATH" > /etc/profile.d/httpd.sh
[root@Static httpd-2.4.48]# bash
[root@Static httpd-2.4.48]# which httpd
/usr/local/apache/bin/httpd# 取消配置文件中ServerName前面的注释
#ServerName提供服务器用于标识自身的名称和端口。
#这通常可以自动确定，但我们建议您指定
#这是为了防止启动过程中出现问题。
#如果您的主机没有注册的DNS名称，请在此处输入其IP地址。
[root@Static httpd-2.4.48]# sed -i 's/^#ServerName www.example.com:80/ServerName www.example.com:80/' /usr/local/apache/conf/httpd.conf# 设置开机自启
[root@Static httpd-2.4.48]# cd /usr/lib/systemd/system/
[root@Static system]# cp sshd.service httpd.service
[root@Static system]# vi httpd.service
[Unit]
Description=httpd server daemon
After=network.target[Service]
Type=forking
ExecStart=/usr/local/apache/bin/apachectl start
ExecStop=/usr/local/apache/bin/apachectl stop
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process[Install]
WantedBy=multi-user.target[root@Static system]# systemctl daemon-reload
[root@Static system]# systemctl start httpd
[root@Static system]# ss -antl
State     Recv-Q    Send-Q       Local Address:Port         Peer Address:Port    Process    
LISTEN    0         128                0.0.0.0:22                0.0.0.0:*                  
LISTEN    0         128                   [::]:22                   [::]:*                  
LISTEN    0         128                      *:80(httpd默认端口)                      *:*

访问页面是否正常

配置动静分离

DR上

# 修改nginx配置文件
[root@DR ~]# vi /usr/local/nginx/conf/nginx.conf
......
35     upstream Dynamic {                    # 添加   需要注意的是upstream要添加在server段的上面
36         server 192.168.220.10;            # 添加
37     }
38 
39     upstream Static {                     # 添加
40        server 192.168.220.17;             # 添加
41     }                                     # 添加
42 
43 
44     server {                              # server段
45         listen       80;
46         server_name  localhost;
......
51        # location / {
52        #     root   html;
53        #     index  index.html index.htm;
54        # }
......
68         location ~ \.php$ {                # 添加
69             proxy_pass   http://Dynamic;   # 添加
70         }                                  # 添加
71 
72        location / {                        # 添加
73             proxy_pass http://Static;      # 添加 
74        }                                   # 添加
......

测试效果

当访问根目录的时候默认是跳到静态的httpd,192.168.220.17上

当访问动态资源时就自动跳到192.168.220.10上

配置负载均衡

DR上

# 修改nginx配置文件
[root@DR ~]# vi /usr/local/nginx/conf/nginx.conf
......
35     upstream LB {                       # 添加  需要注意的是upstream要添加在server段的上面
36         server 192.168.220.10;          # 添加
37         server 192.168.220.17;          # 添加
38     }
39 
40     server {                            # server段
41        listen       80;
42        server_name  localhost;
43
......
51        # location / {
52        #     root   html;
53        #     index  index.html index.htm;
54        # }
......
72        location / {                   # 添加
73             proxy_pass http://LB;     # 添加
74        }                              # 添加
......     

测试效果

访问

刷新，每刷新一次就在192.168.220.10和192.168.220.17上跳转

也可设置权重，让高性能主机的多处理任务

# 比如，修改nginx配置文件
[root@DR ~]# vi /usr/local/nginx/conf/nginx.conf
......
35     upstream LB {                          # 添加   需要注意的是upstream要添加在server段的上面
36         server 192.168.220.10 weight=3;    # 设置权重就会多处理任务
37         server 192.168.220.17;             # 添加
38     }
39 
40     server {                               # server段
41        listen       80;
42        server_name  localhost;
43
......
51        # location / {
52        #     root   html;
53        #     index  index.html index.htm;
54        # }
......
72        location / {                     # 添加
73             proxy_pass http://LB;       # 添加
74        }                                # 添加
......