基于nginx实现web服务器的双机热备

本文主要是介绍基于nginx实现web服务器的双机热备，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

一、nginx.conf配置：


#user  nobody;
worker_processes  4;#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;#连接超时时间，默认为75s，可以在http，server，location块。#gzip  on;#服务器的集群  upstream  netitcast.com {  #服务器集群名字   server    172.18.9.166:9001  weight=2 max_fails=3 fail_timeout=600s;#服务器配置   #weight是权重的意思，权重越大，分配的概率越大。  server    172.18.47.173:9001  weight=1;#server    172.18.47.173:9001  backup;#备用}     server {listen       8888;server_name  xiaobu2019.com;#域名可以有多个，用空格隔开和使用通配符 eg:*.xiaobu.comserver_name www.ha97.com ha97.com;#charset koi8-r;#access_log  logs/host.access.log  main;location / {proxy_pass http://netitcast.com;proxy_redirect default;proxy_connect_timeout 1;}#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; #请求转向mysvr 定义的服务器列表#}# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000##location ~ \.php$ {#    root           html;#根目录#    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;#拒绝的ip#allow 172.18.5.54; #允许的ip   #}}# 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;#    }#}}

二、两个server程序代码：

    @GetMapping("demo")public String demo(){Emp emp = new Emp();emp.setId(UUIDUtils.getUUID());emp.setName("admin2018-12-25");emp.setCreateTime(LocalDateTime.now());empMapper.insertSelective(emp);System.out.println("emp = " + emp);return "server 1 成功插入数据";}

    @GetMapping("demo")public String demo(){Emp emp = new Emp();emp.setId(UUIDUtils.getUUID());emp.setName("admin2018-12-25");emp.setCreateTime(LocalDateTime.now());empMapper.insertSelective(emp);System.out.println("emp = " + emp);return "server 2 成功插入数据";}

三、结果

强行断掉第一个服务，执行结果只会出现备用服务执行。