centos中安装nginx

163.的一个镜像:

 下载的是,先用liveCD,直接启动安装,且文件小,然后再下liveDVD。

还是用了liveDVD

1、mkdir nginx;

cd nginx  ;要联网

wget http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm

下载到nginx文件夹中

2、然后要登入root账户rpm -ivh nginx-release-centos-6-0.el6.ngx.noarch.rpm

3 开始正式安装nginx
yum install nginx

自动下载了1.4.2-1

4 nginx的几个默认目录

whereis nginx  :::查找
nginx: /usr/sbin/nginx /etc/nginx /usr/share/nginx

1 配置所在目录:/etc/nginx/
2 PID目录:/var/run/nginx.pid
3 错误日志:/var/log/nginx/error.log
4 访问日志:/var/log/nginx/access.log
5 默认站点目录:/usr/share/nginx/html

5、配置文件:绝对通过

user  nginx;
worker_processes  1;

error_log  /usr/local/nginx/logs/nginx_error.log warn;
pid        /usr/local/nginx/logs/nginx.pid;

worker_rlimit_nofile 51200;
events {
    use epoll;
    worker_connections  51200;
}


http {
    include       mime.types;
    default_type  application/octet-stream;
    #charset gb2312;
    
    log_format  access  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
    access_log  /usr/local/nginx/logs/access.log  access;

    server_names_hash_bucket_size 128;
    client_header_buffer_size 32k;
    large_client_header_buffers 4 32k;

    sendfile        on;
    tcp_nopush     on;
    keepalive_timeout  60;
    tcp_nodelay on;

    #gzip  on;

    #include /etc/nginx/conf.d/*.conf;
    upstream abc.com{
      server 192.168.16.100:8080;
      server 192.168.16.100:18080;
    }
    server{
      listen 80;
      server_name www.abc.com;
      index index.php index.html index.htm;
      root /http;
      location /nginxstatus{
	  stub_status on;
	  access_log off;
      }
      location /{
	  proxy_pass http://abc.com;
	  proxy_redirect off;
	  proxy_set_header X-Real-IP	$remote_addr;
	  proxy_set_header Host $http_host;
	  proxy_set_header 	X-Forwarded-For $proxy_add_x_forwarded_for;
	  
	  #proxy_set_header Host $host;
      }
    
    
    client_max_body_size 10m;
    client_body_buffer_size 128k;
    proxy_connect_timeout 600;
    proxy_read_timeout 600;
    proxy_send_timeout	600;
    proxy_buffer_size 8k;
    proxy_buffers	4 32k;
    proxy_busy_buffers_size	64k;
    proxy_temp_file_write_size	64k;

    }
}

nginx -s stop 更新配置线关闭nginx

必须是root用户 su root,才能执行

chown 当前用户 nginx.conf 才能保存

主机无法访问虚拟机centos中的nginx(http://vm-centos/nginxstatus),关闭虚拟机的防火墙--ok

Jmeter终于可以超过511个并发了,测试1024对2*tomcat(200并发),大约是8s

但是10240个并发时,大约是开始有1000多个失败,

centos的默认文件句柄数多少?

 ulimit -SHn 51200 #设置打开文件句柄

ulimit -a

open file =1024

这个值变动后好像没有什么反应。

nginx(centos,1cpu,connection=10240)+2*tomcat(windows7,500并发)

 但是当connect=1024时,并发512,出现连接io失败

修改为2cpu,connection=1024时,并发1024,还是出现少量失败

当2cpu+(conn=10240),1024并发,平均耗时2050ms;500并发(64ms);800(632ms)

调整了句柄数为51200没有影响

性能最终测试::

worker_processes=2,worker_connections=51200+2*tomcat(windows7,maxThreads=1024,acceptCount=500)

1)tomcat配置

connectionTimeout="20000"
               redirectPort="8443"
                maxThreads="1024"
                minSpareThreads="300"
                acceptCount="500"
                enableLookups="false"

2)Jmeter配置

set HEAP=-Xms2048m -Xmx2048m
set NEW=-XX:NewSize=512m -XX:MaxNewSize=512m
set SURVIVOR=-XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=50%
set TENURING=-XX:MaxTenuringThreshold=2
set RMIGC=-Dsun.rmi.dgc.client.gcInterval=600000 -Dsun.rmi.dgc.server.gcInterval=600000
set PERM=-XX:PermSize=128m -XX:MaxPermSize=128m

3)结果

并发1024::平均2260ms

并发2048::平均3288ms

并发4096::失败105

并发3072::失败76

worker_processes=2,worker_connections=51200+

2*tomcat(windows7,maxThreads=2048,acceptCount=800)

结果:还是少量失败

创建4个tomcat,可惜系统开始卡机了,没法子测试啦

并发1024::平均1664ms

并发2048::平均3927ms,已经不太真实了,测试环境不足!没啥意义了

测试代码jsp

<html>
<%@ page language="java"%> 
<%@ page contentType="text/html; charset=utf-8"%> 
<%@ page import="java.util.*"%><!-- 获取系统时间必须导入的  -->
<%@ page import="java.text.*"%><!-- 获取系统时间必须导入的 -->
<body>
	test---tomcat
	<%
	System.out.println("=========" + new Date() + "=================="); 
	Thread.sleep(10000);
	System.out.println("=========" + new Date() + "=================="); 
%>
</body>
</html>

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