nginx负载均衡设置 转载并亲测

Nginx负载均衡器的优点许多,简单概括为:

①实现了可弹性化的架构,在压力增大的时候可以临时添加tomcat服务器添加到这个架构里面去;

②upstream具有负载均衡能力,可以自动判断下面的机器,并且自动踢出不能正常提供服务的机器;而Keepalvied可保证单个nginx负载均衡器的有效性,避免单点故障.

IP地址

nginx(主负载均衡器):192.168.18.118
nginx(从负载均衡器):192.168.1.120
VIP地址:192.168.1.108
web1的IP:192.168.18.105
web2的IP:192.168.18.117
web3的IP:192.168.1.121

布置整个环境用到的软件为:

1.            nginx-0.7.17.tar.gz  
    

2.            prce-7.7.tar.gz 
    

3.            mysql
    

4.            php
    

①首先分别在3台tomcat主机上布置环境,安装nginx+php+mysql,具体步骤为:

略

②分别在二台nginx负载均衡器上安装nginx及配置

下载及安装nginx:

1.            wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-7.7.tar.gz  
    

2.            tar zxvf pcre-7.7.tar.gz  
    

3.            cd pcre-7.7/  
    

4.            ./configure  
    

5.            make && make install  
    

6.            wget http://sysoev.ru/nginx/nginx-0.7.17.tar.gz  
    

7.            tar zxvf nginx-0.7.17.tar.gz  
    

8.            cd nginx-0.7.17/  
    

9.            ./configure --prefix=/usr/local/nginx --with-http_stub_status_module  
    

10.        make && make install 
    

这里贴上nginx.conf配置文件,不加任何说明,方便用X-shell直接粘贴,很人性化的噢:)二个nginx负载均衡器的文件一样,配置完成后分别用/usr/local/nginx/sbin/nginx启动｡

 

user www www;

worker_processes 1;

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;

server_names_hash_bucket_size 128;

client_header_buffer_size 32k;

large_client_header_buffers 4 32k;

client_max_body_size 8m;

sendfile on;

tcp_nopush     on;

keepalive_timeout 60;

tcp_nodelay on;

fastcgi_connect_timeout 300;

fastcgi_send_timeout 300;

fastcgi_read_timeout 300;

fastcgi_buffer_size 64k;

fastcgi_buffers 4 64k;

fastcgi_busy_buffers_size 128k;

fastcgi_temp_file_write_size 128k;

gzip on;

gzip_min_length 1k;

gzip_buffers     4 16k;

gzip_http_version 1.0;

gzip_comp_level 2;

gzip_types       text/plain application/x-javascript text/css application/xml;

gzip_vary on;

upstream backend

{

server 192.168.18.117;

server 192.168.18.105;

server 192.168.1.121;

}

server {

listen 80;

server_name test.com www.test.com;

location / {

root /usr/local/nginx/www ;

index index.jsp index.htm index.html;

proxy_redirect off;

proxy_set_header Host $host;

proxy_set_header X-Real-IP $remote_addr;

proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

proxy_pass http://backend;

}

 

#location /nginx {

#access_log on;

#auth_basic "NginxStatus";

#auth_basic_user_file /usr/local/nginx/htpasswd;

#}

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;

}

}

 

③在二台Nginx机上安装及配置keepalived,做双机互备｡

1.            #wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz  
    

2.            #tar zxvf keepalived-1.1.15.tar.gz  
    

3.            #cd keepalived-1.1.15  
    

4.            #./configure  
    

5.            #make  
    

6.            #make install  
    

7.            将keepalived做成启动脚务,方便管理:  
    

8.            #cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/  
    

9.            #cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/  
    

10.        #mkdir /etc/keepalived  
    

11.        #cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/  
    

12.        #cp /usr/local/sbin/keepalived /usr/sbin/  
    

13.        #service keepalived start|stop 
    

在二台Nginx上,我分别贴出keepalived.conf配置文件,配置完成后分别用service keepalived start启动｡检验keepalived是否成功可用命令

1.            ip avrrp_instance VI_INET1 {  
    

2.                    state MASTER  
    

3.                    interface eth0  
    

4.                    virtual_router_id 53  
    

5.                    priority 200  
    

6.                    advert_int 1  
    

7.                    authentication {  
    

8.                            auth_type pass  
    

9.                            auth_pass yourpass  
    

10.                }  
    

11.                virtual_ipaddress {  
    

12.                        192.168.1.108  
    

13.                }  
    

14.        }  
    

15.         
    

16.        vrrp_instance VI_INET1 {  
    

17.                state BACKUP  
    

18.                interface eth0  
    

19.                virtual_router_id 53  
    

20.                priority 100  
    

21.                advert_int 1  
    

22.                authentication {  
    

23.                        auth_type pass  
    

24.                        auth_pass yourpass  
    

25.                }  
    

26.                virtual_ipaddress {  
    

27.                        192.168.1.108  
    

28.                }  
    

29.        } 
    

以上三步完成nginx负载均衡设置后,就是检测了,大家可任意停掉其中一台的任何服务;在正常结果中大家应该发现,其中任意一台服务器宕机后,不影响整个系统的运作｡