搭建nginx负载均衡服务器

Nginx的反向代理功能配置一个nginx负载均衡服务器,后端有三个服务节点,提供web服务。


搭建环境:
系统redhat系统5.4
 
(1)搭建前准备:
四台linux主机
DNS:192.168.1.150
web:192.168.1.121
web:192.168.1.125
web:192.168.1.126
nginx:192.168.1.120  用nginx搭建负载均衡
 
注明:
在这里主要介绍nginx使用,以上几台请参考其它配置文件来做。
再要搭建nginx负载时首先做好域名解析:注明:其他三个web不需要做什么域名解析,
A记录:www.test.com
反向记录:192.168.1.120
 
 
一:现在开始安装nginx
(1)安装依赖包:
gcc,openssl-devel,pcre-devl,zlib-devel软件库。
(2)安装Nginx所需的pcre-devel库
tar -zxvf pcre-8.02.tar.gz
cd pcre-8.02
./configure
make
make install
(3)安装Nginx
tar -zxvf nginx-0.7.65.tar.gz -C /usr/src/
cd nginx-0.7.65
./configure  --with-http_gzip_static_module --with-http_stub_status_module --prefix=/usr/local/nginx
make
make install
 
检查Nginx配置文件是否正常:
/opt/nginx/sbin/nginx -t
the configuration file /opt/nginx/conf/nginx.conf syntax is ok
configuration file /opt/nginx/conf/nginx.conf test is successful
 
启动Nginx服务:
/usr/local/nginx/sbin/nginx
 
关闭Nginx服务:
kill xxx pid号
 
到此Nginx安装完成
(4)配置主配置文件
vim /usr/local/nginx/conf/nginx.conf
 
user  nobody;
worker_processes  1;
 
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
error_log  logs/error.log  debug;
 
pid        logs/nginx.pid;
 
 
events {
     use epoll;
     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;
 
     gzip  on;
     gzip_min_length 1k;
     gzip_buffers    6   16k;
     gzip_http_version   1.1;
     gzip_comp_level 2;
     gzip_types  text/plain  application/x-javascript    text/css application/xml;
     gzip_vary   on;
#    server {
#        listen       80;
#        server_name  localhost;
 
         #charset koi8-r;
 
         #access_log  logs/host.access.log  main;
 
         #location / {
         #    root   html;
         #    index  index.html index.htm;
         #}
 
         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;
         #}
 
       # 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;
     #    server_name  localhost;
 
     #    ssl                  on;
     #    ssl_certificate      cert.pem;
     #    ssl_certificate_key  cert.key;
 
     #    ssl_session_timeout  5m;
 
     #    ssl_protocols  SSLv2 SSLv3 TLSv1;
     #    ssl_ciphers  ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
     #    ssl_prefer_server_ciphers   on;
 
     #    location / {
     #        root   html;
     #        index  index.html index.htm;
     #    }
     #}
   http
     {
         upstream www.test.com {
             server  192.168.1.125:80 weight=3 max_fails=3 fail_timeout=20s;
             server  192.168.1.126:80 weight=1 max_fails=3 fail_timeout=20s;
             server  192.168.1.121:80 weight=5 max_fails=3 fail_timeout=20s;
             }
 
     server
     {
         listen  80;
         server_name www.test.com;
         index   index.htm  index.html;
         #root /web/wwwroot;
 
     location / {
         proxy_pass http://www.test.com;
         proxy_next_upstream http_500 http_502 http_503 error timeout invalid_header;
         proxy_set_header   Host             $host;
         proxy_set_header   X-Real-IP        $remote_addr;
         proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;
         include proxy.conf;
       }
     log_format  blog_test_com  '$remote_addr - $remote_user [$time_local] $request '
                                 '"$status" $body_bytes_sent "$http_referer" '
                                 '"$http_user_agent" "$http_x_forwarded_for"';
              access_log logs/blog_test_com;
      }
    }
 
 
(5)配置proxy.conf文件
vim /usr/local/nginx/conf/proxy.conf
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;
client_body_buffer_size 128k;
proxy_connect_timeout 90;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size   4k;
proxy_buffers 6 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
:wq 保存
 
注明:到此nginx负载均衡已搭建完成,
 
测试:http://www.test.com  就看可以访问到

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转载自yangxianjiangg.iteye.com/blog/1518624