lnmp架构之redis+mysql+nginx 架构 && gearmand实现数据同步更新

1. redis(缓存)+mysql（数据库）+nginx（前端）架构

1.1架构介绍思路？

数据访问流程：client -> app -> redis -> mysql -> redis -> client

客户端用app访问，先在redis里读数据，redis没有才去mysql读，读完保存在redis里，然后返回客户端，下次再读就快;这种数据访问流程不但提高了访问速度，而且还减轻了数据库的读压力；我们知道客户的读需求远远大于写需求。这种访问流程大大提高了客户体验度

1.2架构实现

实验说明：

在server1:
（1）下载安装nginx

[root@redis1 ~]# yum install psmisc-22.20-11.el7.x86_64  -y  ##下载killall命令软件
[root@redis1 ~]# killall redis-server   ##关闭之前所有redis服务
[root@redis1 ~]# /etc/init.d/redis_6379 stop
/var/run/redis_6379.pid does not exist, process is not running

[root@redis1 ~]# tar zxf nginx-1.15.9.tar.gz 
[root@redis1 ~]# ls
nginx-1.15.9  nginx-1.15.9.tar.gz  redis
[root@redis1 ~]# cd nginx-1.15.9
[root@redis1 nginx-1.15.9]# ls
auto     CHANGES.ru  configure  html     man     src
CHANGES  conf        contrib    LICENSE  README
[root@redis1 nginx-1.15.9]# vim auto/cc/gcc
171 # debug
172 #CFLAGS="$CFLAGS -g"

编译安装：

[root@redis1 nginx-1.15.9]# ./configure --prefix=/usr/local/nginx
[root@redis1 nginx-1.15.9]# yum install pcre-devel -y
[root@redis1 nginx-1.15.9]# yum install zlib-devel -y 
[root@redis1 nginx-1.15.9]# ./configure --prefix=/usr/local/nginx
[root@redis1 nginx-1.15.9]# make && make install

（2）修改nginx配置文件

[root@redis1 conf]# useradd -s /sbin/nologin nginx
[root@redis1 conf]# id nginx
uid=1000(nginx) gid=1000(nginx) groups=1000(nginx)
[root@redis1 conf]# vim nginx.conf
 2 user  nginx nginx;  ##修改进程用户
 43         location / {
 44             root   html;
 45             index  index.html index.htm index.php;
 46         }
 47 
 65        location ~ \.php$ {    ##开启php模块
 66            root           html;
 67            fastcgi_pass   127.0.0.1:9000;  ##php、duankou
 68            fastcgi_index  index.php;
 69            #fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
 70            include        fastcgi.conf;
 71        }
[root@redis1 local]# ln -s /usr/local/nginx/sbin/nginx  /usr/local/sbin/nginx  ##链接
[root@redis1 local]# nginx
[root@redis1 local]# netstat -antulp  ##查看端口是否开启
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      7495/nginx: master  
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      963/sshd            
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1290/master         
tcp        0      0 172.25.19.131:22        172.25.19.250:60750     ESTABLISHED 2134/sshd: root@pts 
tcp6       0