一） nginx  简介
nginx   #软件负载均衡 # 卖给 F5(硬件负载均衡 Load Balancer/LB ) ==> upstream/backend 


二）lnmp  环境搭建起来，编译安装。

2.1） 编译安装nginx

yum -y install gcc gcc-c++* openssl openssl-devel zlib zlibdevel pcre pcre-devel
yum -y groupinstall "Development Tools"
yum -y install libxml2 libxml2-dev libxslt-devel
yum -y install gd-devel
yum -y install perl-devel perl-ExtUtils-Embed
yum -y install GeoIP GeoIP-devel GeoIP-data   \
ncurses ncurses-devel     \
libtool-ltdl-devel libjpeg-devel libpng-devel libtiff-devel fontconfig-devel   \
freetype-devel libXpm-devel gettext-devel


useradd -M -s /sbin/nologin nginx

./configure --prefix=/usr/local/nginx --user=nginx   \
--group=nginx --with-http_stub_status_module --with-http_ssl_module   \
--with-http_stub_status_module   \
--with-http_ssl_module

make && make install
# make  -j4 && make install    #  make  -j$(nproc) && make install

   80  ln -sf /usr/local/nginx/sbin/nginx   /usr/local/sbin/
   81  ls /usr/local/sbin/
   82  echo  $PATH


nginx -t  # 测试配置文件语法是否有错误。  

httpd -t #  
dhcpd -t #
named-checkconf    #/etc/named.conf     listen { 127.0.0.1; 192.168.139.110; };
named-checkzone  qm123.com   /var/named/qm123.com.zone 

man  7 signal      ## kill -9   -9的含义

killall -s HUP nginx       ##重新加载 配置文件。  

# nginx.conf 

user nobody;        #运行用户
worker_processes 4; #启动进程,通常设置成和“cpu的数量相等” 上下文切换 context switch 
										# 一般设置为 4  8

## 优化,调优  tuning  tune    ## 基于压力测试的数据  # 压力测试 benchmark   ##
          concurrency 并发 
如ab 命令 apache benchmark. 
ab -n 50000 -c 100  http://192.168.139.80/ 

# 调优示范。
ulimit 命令
ulimit -n    #系统打开的文件数 上限。

vi  /etc/security/limits.conf

# tail -5  /etc/security/limits.conf      #number of file 系统能打开的文件数。
*      soft   nofile   500000 
*      hard   nofile   500000 



curl 'https://baike.baidu.com/item/F5/7612514' 


server {
listen 80;
server_name www.qingmei.com;
charset utf8;
#access_log logs/host.access.log main;
location / {
root /var/www/html;
index index.html index.htm;
}
#添加虚拟目录
location /status{
stub_status on; //启用HTTP_STUB_STATUS状态统计模块
access_log off; //关闭该目录访问日志
}
}

三）lnmp环境搭建

yum -y install gcc gcc-c++ cmake make
yum -y install libtool zlib zlib-devel pcre pcre-devel \
openssl openssl-devel ncurses ncurses-devel bison



mkdir -p /data
useradd -M -s /sbin/nologin mysql
chown -R mysql:mysql /data


./mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/data/mysql


cp /usr/local/mysql/support-files/mysql.server   /etc/init.d/mysqld
2、编辑脚本控制程序：
[root@jianfeng ~]# vim /etc/init.d/mysqld


 ./mysqladmin -uroot password "123.com"
 
 [root@jianfeng bin]# mysql -uroot -p123.com
mysql> create database wordpress;
mysql> grant all on *.* to "root"@"127.0.0.1" identified by '123.com';
mysql> quit;


yum -y install \
libjpeg \
libjpeg-devel \
libpng libpng-devel \
freetype freetype-devel \
libxml2 \
libxml2-devel \
zlib zlib-devel \
curl curl-devel \
openssl openssl-devel


./configure \
--prefix=/usr/local/php \
--with-mysql-sock=/data/mysql.sock \
--with-mysqli \
--with-zlib \
--with-curl \
--with-gd \
--with-jpeg-dir \
--with-png-dir \
--with-freetype-dir \
--with-openssl \
--enable-fpm \
--enable-mbstring \
--enable-xml \
--enable-session \
--enable-ftp \
--enable-pdo \
--enable-tokenizer


make -j4 && make install


###

复制配置文件
cp /usr/local/php/etc/php-fpm.conf.default    /usr/local/php/etc/php-fpm.conf
cp /usr/local/php/etc/php-fpm.d/www.conf.default   /usr/local/php/etc/php-fpm.d/www.conf
cp /usr/src/php-7.3.9/php.ini-development        /usr/local/php/php.ini


cp /usr/src/php-7.3.9/sapi/fpm/init.d.php-fpm /etc/init.d/php-fpm
[root@jianfeng ~]# chmod +x /etc/init.d/php-fpm
[root@jianfeng ~]# chkconfig --add php-fpm


echo 'PATH=/usr/local/php/bin:$PATH' >> /etc/profile
source /etc/profile


location ~ \.php$ {
fastcgi_pass 127.0.0.1:9000;
fastcgi_index index.php;
include fastcgi.conf;
}


<?php
$link=mysqli_connect('127.0.0.1','root','123.com');
if($link) echo "<h1>Success!!</h1>";
else echo "Fail!!";
?>



admin
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