nginx 动静分离 负载均衡

nginx反向代理：

先说正向代理，比如要访问youtube,但是不能直接访问，只能先找个FQ软件，通过FQ软件才能访问youtube. FQ软件就叫做正向代理。所谓的反向代理，指的是用户要访问youtube,但是youtube悄悄地把这个请求交给bilibili来做，那么bilibili就是反向代理了。

 

nginx动静分离：

好处是nginx处理静态内容的吞吐量很高，比tomcat高多了，这样无形中提升了性能。

 

nginx负载均衡：

当访问量很大的时候，一个 Tomcat 吃不消了，这时候就准备多个 Tomcat，由Nginx按照权重来对请求进行分配，从而缓解单独一个Tomcat受到的压力。

引起的问题：用redis共享；

 

#user  nobody;
worker_processes  1;

#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;
    
    upstream tomcat_8111_8222{  
        server 127.0.0.1:8111 weight=1;
        server 127.0.0.1:8222 weight=2;
        #ip_hash;  # 同一个ip分配到同一个tomcat.如果是一个局域网内的大量请求,就不行了.用redis
    }
    
    server {
        listen       8090;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            proxy_pass http://tomcat_8111_8222;  #负载均衡
            #proxy_pass http://127.0.0.1:8111;
            #root   html;
            #index  index.html index.htm;
        }
        
        location ~\.(css|js|png)$ {
            root C:/bj_install/tomcat_8111/webapps/ROOT;  #动静分离
        }
        
        #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;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

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


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

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

}

 

 

参考：

https://how2j.cn/k/nginx/nginx-tutorial/1565.html