大纲

1.从单体到集群过渡

 

 

 

 

 

 

2.Nginx

 2.1什么是nginx

 2.2常见服务器

 2.3nginx在架构中所处位置

2.4使用率，性能，市场占有率等信息

 

 

 2.5正反向代理啥意思

正向代理

 反向代理

示例

 

2.6安装步骤

Nginx安装步骤 常用命令等

2.7请求链路

 

2.8进程模型

通用模型 一个管事的 多个打工的

2.9通用命令

-s stop  强制关机

-s quit 保存当前配置然后关机

-s reload 刷新配置

-h 帮助命令 里面还有些别的常用命令

[root@VM-4-3-centos sbin]# ./nginx -s stop
[root@VM-4-3-centos sbin]# ./nginx -s quit
nginx: [error] open() "/var/run/nginx/nginx.pid" failed (2: No such file or directory)
[root@VM-4-3-centos sbin]# ./nginx
[root@VM-4-3-centos sbin]# ./nginx -s quit
[root@VM-4-3-centos sbin]# ./nginx -h
nginx version: nginx/1.22.1
Usage: nginx [-?hvVtTq] [-s signal] [-p prefix]
             [-e filename] [-c filename] [-g directives]

Options:
  -?,-h         : this help
  -v            : show version and exit
  -V            : show version and configure options then exit
  -t            : test configuration and exit
  -T            : test configuration, dump it and exit
  -q            : suppress non-error messages during configuration testing
  -s signal     : send signal to a master process: stop, quit, reopen, reload
  -p prefix     : set prefix path (default: /usr/local/nginx/)
  -e filename   : set error log file (default: /var/log/nginx/error.log)
  -c filename   : set configuration file (default: conf/nginx.conf)
  -g directives : set global directives out of configuration file

2.10核心配置文件各个配置的含义

#user  nobody;
worker_processes  2;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;

    server {
        listen       888;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            root   html;
            index  index.html index.htm;
        }

        #error_page  404              /404.html;
        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
}

1.