nginx的一些简单配置

user  nobody;
worker_processes  auto;#nginx 进程数，建议按照cpu 数目来指定，一般为它的倍数，auto是自动检测

#一个nginx 进程打开的最多文件描述符数目，理论值应该是最多打开文件数（ulimit -n）与nginx 进程数相除，
#但是nginx 分配请求并不是那么均匀，所以最好与ulimit -n 的值保持一致，
#这个是系统打开文件限制有关，如果系统没有更改这里设置再高也没有用，会报24: Too many open files的错误，
#mac压力测试前先ulimit -n 10000，10000据说是mac的上限，linux上限是60000，但是也有人说8g的mac上限只有2500，
#经过我的测试即使ulimit -n 10000设置了，worker_rlimit_nofile设置为10000和2048的效果没什么区别
worker_rlimit_nofile 2048;

error_log  logs/error.log;#错误日志
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

pid        logs/nginx.pid;#进程号

events {
worker_connections  2048;#每个进程允许的最多连接数， 理论上每台nginx 服务器的最大连接数为worker_processes*worker_connections
multi_accept on;
#use epoll;#使用epoll的I/O模型，linux2.6以上才能用，mac,windows都不能用
}

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;#连接记录

sendfile        on;
#tcp_nopush     on;

#keepalive_timeout  0;
keepalive_timeout  65;

gzip  on;#打开压缩

upstream backend {
#ip_hash;
# 负载均衡，backend是组名
server 127.0.0.1:5000;
server 127.0.0.1:5001;
server 127.0.0.1:5002;
server 127.0.0.1:5003;
}

server {
listen       8089;#端口
server_name  localhost;#ip

#charset koi8-r;

#access_log  logs/host.access.log  main;

#location / {
#root   html;
#index  index.html index.htm;
#}
location / {
try_files @uri @pp;
}
location @pp {
# 方向代理
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_pass http://backend;#如果用负载均衡使用组名，如果只是反向代理使用要代理的ip和端口如http://127.0.0.1:5000 }

#error_page  404              /404.html;
# redirect server error pages to the static page /50x.html
error_page   500 502 503 504  /50x.html;#50x的错误页面
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;
#    }
#}

}