环境：

CentOS release 5.8 192.168.10.108 cat
CentOS release 5.5 912.168.200.208
主调度器：192.168.10.108 192.169.10.251
备调度器：192.168.200.208 192.168.200.148

real ip :
192.169.10.251
192.168.200.148
vip : 192.168.10.104

在主备服务器上部署nginx

1. 下载

   wget http://nginx.org/download/nginx-1.0.11.tar.gz
   wget http://labs.frickle.com/files/ngx_cache_purge-1.4.tar.gz
   

2. 安装

   yum -y install zlib-devel pcre-devel openssl-devel  # 安装依赖
   tar –xvf ngx_cache_purge-1.4.tar.gz
   tar –xvf nginx-1.0.11.tar.gz
   cd nginx-1.0.11/
   ./configure –prefix=/usr/local/nginx –add-module=../ngx_cache_purge-1.4 –with-http_stub_status_module –with-http_ssl_module –with-http_flv_module –with-http_gzip_static_module
   Make && make install
   

   vi /usr/local/nginx/conf/nginx.conf
   user nobody;
   worker_processes 8;
   #error_log logs/error.log error;
   error_log /data/logs/error.log crit;
   #error_log logs/error.log notice;
   #error_log logs/error.log info;
   #pid logs/nginx.pid;
   events {
   worker_connections 1024;
   }
   http {
   include mime.types;
   default_type application/octet-stream;
   charset utf-8;
   server_names_hash_bucket_size 128;
   client_header_buffer_size 32k;
   large_client_header_buffers 4 32k;
   client_max_body_size 300m;
   tcp_nopush on;
   tcp_nodelay on;
   client_body_buffer_size 512k;
   proxy_connect_timeout 5;
   proxy_read_timeout 60;
   proxy_send_timeout 5;
   proxy_buffer_size 16k;
   proxy_buffers 4 64k;
   proxy_busy_buffers_size 128k;
   proxy_temp_file_write_size 128k;
   #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;
   #keepalive_timeout 65;
   gzip on;
   gzip_min_length 1k;
   gzip_buffers 4 16k;
   gzip_http_version 1.1;
   gzip_comp_level 2;
   gzip_types text/plain application/x-javascript text/css application/xml;
   gzip_vary on;
   proxy_temp_path /data/proxy_temp_dir;
   proxy_cache_path /data/proxy_cache_dir levels=1:2 keys_zone=cache_one:50m inactive=1m max_size=2g;
   upstream real_server_pool{
   server 192.168.200.148:80 weight=1 max_fails=2 fail_timeout=30s;
   server 192.168.10.251:80 weight=1 max_fails=2 fail_timeout=30s;
   }
   #tcp_nopush on;
   #keepalive_timeout 0;
   keepalive_timeout 65;
   #gzip 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;
   proxy_next_upstream http_502 http_504 error timeout invalid_header;
   proxy_cache cache_one;
   proxy_cache_valid 200 304 12h;
   proxy_cache_key $host$uri$is_args$args;
   proxy_set_header Host $host;
   proxy_set_header X-Forwarded-For $remote_addr;
   proxy_pass http://real_server_pool;
   expires 1d;
   }
   #error_page 404 /404.html;
   # redirect server error pages to the static page /50x.html
   #
   error_page 500 502 503 504 /50x.html;
   location = /50x.html {
   root html;
   }
   # proxy the PHP scripts to Apache listening on 127.0.0.1:80
   #
   #location ~ \.php$ {
   # proxy_pass http://127.0.0.1;
   #}
   location ~ .*\.(php|jsp|cgi)?$
   {
   proxy_set_header Host $host;
   proxy_set_header X-Forwarded-For $remote_addr;
   proxy_pass http://real_server_pool;
   }
   log_format access ‘$remote_addr – $remote_user [$time_local] “$request”‘
   ‘$status $body_bytes_sent “$http_referer” ‘
   ‘”$http_user_agent” $http_x_forwarded_for';
   access_log /data/logs/access.log access;
   }
   # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
   #
   #location ~ \.php$ {
   # 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 HIGH:!aNULL:!MD5;
   # ssl_prefer_server_ciphers on;
   # location / {
   # root html;
   # index index.html index.htm;
   # }
   #}
   

备用调度器的nginx配置文件和主调度器的配置文件一样。
启动nginx

/usr/local/nginx/sbin/nginx

安装keepalived（在nginx的mater和backup都安装）

1. 下载

   wget http://www.keepalived.org/software/keepalived-1.1.19.tar.gz
   

2. 安装

   tar zxvf keepalived-1.1.19.tar.gz
   cd keepalived-1.1.19
   ./configure –prefix=/usr/local/keepalived
   make
   make install
   cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
   cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
   cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
   mkdir /etc/keepalived
   

   vi /etc/keepalived/keepalived.conf
   vrrp_instance VI_INET1 {
   state MASTER
   interface eth0
   virtual_router_id 53
   priority 100
   advert_int 1
   authentication {
   auth_type pass
   auth_pass 1111
   }
   virtual_ipaddress {
   192.168.10.104/24
   }
   }
   virtual_server 192.168.10.104 80 {
   delay_loop 6
   lb_algo rr
   lb_kind NAT
   nat_mask 255.255.255.0
   persistence_timeout 50
   protocol TCP
   real_server 192.168.10.251 80 {
   weight 3
   TCP_CHECK {
   connect_timeout 10
   nb_get_retry 3
   delay_before_retry 3
   connect_port 80
   }
   }
   real_server 192.168.200.148 80 {
   weight 3
   TCP_CHECK {
   connect_timeout 10
   nb_get_retry 3
   delay_before_retry 3
   connect_port 80
   }
   }
   }
   

3. 配置备用调度器的keepalived,只需要将state MASTER 改为state BACKUP,降低priority 100 的值:

   state MASTER —> state BACKUP
   priority 100 —>  priority 99 （此值必须低于主的）
   

   主备启动

   /etc/init.d/keepalived start
   

   测试

   建立虚拟主机（自己测试啊 O(∩_∩)O~）