Nginx反向代理以及配置优化

下面配置包含了，nginx配置的一个比较全面的反向代理的例子：

user www www  worker_processes  8;        events {      use epoll;      worker_connections  10240;  }    pid       /opt/work/log/nginx.pid;  error_log /dev/null error;    http {        include /opt/nginx/conf/mime.types;      default_type     text/html;         log_format  pv  '[$time_local]|$remote_addr|$cookie_SUV|$args|$http_referer|$http_user_agent';         log_format   main '$request_time $remote_addr $cookie_SUV [$time_local]  $status '  '"$request" $body_bytes_sent "$http_referer" '  '"$http_user_agent" "$http_x_forwarded_for"'  '"$cookie_Fr"';             log_format  pbmain    '$remote_addr - $remote_user [$time_local] "$request" '                                  '$status $body_bytes_sent "$http_user_agent"';       access_log off;         sendfile    on;           keepalive_timeout  0;         gzip  on;            #允许客户端请求的最大单个文件字节数       client_max_body_size    200m;      upload_progress proxied 8m;            #DNS服务器ip      resolver 192.168.1.1;            proxy_set_header Host $http_host;      proxy_set_header x-forwarded-for  $remote_addr;      proxy_cache_key  "$scheme$host$request_uri";      proxy_cache_path /opt/work/cache levels=1:2:1 keys_zone=js_cache:100m max_size=1024m inactive=15d;      proxy_cache_valid any 15d;        upstream backend {          ip_hash;          server  127.0.0.1:8080 weigth=4 max_fails=2 fail_timeout=30s;          server  127.0.0.1:8081 weigth=3 max_fails=2 fail_timeout=30s;      }      upstream liveBackends {         server   192.168.1.15:9090;         server   192.168.1.16:9090;         #备机         server   192.168.1.17:9090 backup;       }        server{          listen 80;          server_name www.myserver1.com;       error_log   /opt/work/log/nginx_error.log error;          client_max_body_size    200m;          proxy_set_header Host $http_host;          proxy_set_header x-forwarded-for  $remote_addr;          proxy_buffer_size         64k;          proxy_buffers             32 64k;                #查看服务状态          location /server-status {                 stub_status on;                 access_log   off;                 allow all;          }          location ^~ /pv        {              access_log  /opt/work/log1/nginx_access.log  pv;              proxy_pass http://backend;          }              location ^~ /cc.do          {              proxy_pass http://backend;          }          location ^~/favicon.ico{              alias /usr/local/src/web/favicon.ico;           }           location ^~ /pv2        {              access_log  /opt/work/log2/nginx_access.log  pv;       access_log  /opt/work/log/main/nginx_access_main.log main;              error_log   /opt/work/log/error/nginx_error.log error;              return 204;          }               location /proxy/          {       #后端返回502,504，执行超时等错误，自动将请求转发到upstream负载池中另一台服务器              proxy_next_upstream  http_502 http_504 error timeout invalid_header;       proxy_pass http://backend;            }          #禁止访问除以外的其他目录          location /{             deny all;          }      }         server{          listen       80;          server_name  www.myserver2.com;          root         /www;    location ~ t1\.(gif)$ {    root /www;    expires -1;                  access_log      /data/log/access.log  pbmain;                  proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;                 }            location ~ t2.(gif)$ {                  root /www;                  expires -1;                               access_log      /data/log/access.log  pbmain;                  proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;               if ($args ~ "ltype=1(&|$)") {                proxy_pass http://liveBackends;        }          }              location /server-status {                          stub_status     on;                          access_log      off;                          allow           10.0.0.0/8;                          allow           192.168.0.0/16;                          deny            all;           }          error_page  404              /404.html;            error_page   500 502 503 504  /50x.html;          location = /50x.html {              root   html;          }      }    }

配置完后通过命令 nginx -t  （或者nginx -t -c 配置文件路径）来检查配置文件是否有语法错误，没有错误后就可以启动了 /usr/local/nginx/sbin/nginx -c  /usr/local/nginx/conf/nginx.conf ,用默认路径配置文件的话可以不加-c

从容停止kill -QUIT nginx主进程号

平滑重启 kill -HUP nginx主进程号

配置文件修改可以通过不停机reload的方式实现加载。 nginx -s reload

来自：http://blog.csdn.net/liuzhoulong/article/details/8886585