一、基础环境：
负 载 机：A机器： 192.168.71.223
后端机器1：B机器：192.168.71.224
后端机器2：C机器：192.168.71.226
需求： 1）访问A机器的8080端口，反向代理到B机器的8080端口； 访问A机器的8088端口，反向代理到C机器的8088端口； 访问http://192.168.71.223:8090/ios，反向代理到B机器http://192.168.1.102:8090/ios/ 2）访问A机器的80端口，负载均衡到后端的两台机器B和C的80端口
二、安装配置：
1、三个机器共同执行：
1）编译安装nginx yum install -y pcre* openssl* gcc gcc+ mkdir /opt/src && cd /opt/src wget http://nginx.org/download/nginx-1.8.0.tar.gz && tar -zxvf nginx-1.8.0.tar.gz && cd nginx-1.8.0 useradd www -M -s /sbin/nologin #添加www用户，其中-M参数表示不添加用户家目录，-s参数表示指定shell类型 vi /opt/src/nginx-1.8.0/auto/cc/gcc #CFLAGS="$CFLAGS -g" #将这句注释掉 取消Debug编译模式 大概在179行
./configure --prefix=/opt/nginx --user=www --group=www --with-http_stub_status_module --with-http_ssl_module #我们再配置下nginx编译参数 make && make install clean
2、机器A配置：
cd /opt/nginx/conf
vi nginx.conf
将配置改为：
worker_processes 2; events { worker_connections 65535; } http { include mime.types; default_type application/octet-stream; charset utf-8; log_format main '$http_x_forwarded_for $remote_addr $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_cookie" $host $request_time'; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; fastcgi_connect_timeout 3000; fastcgi_send_timeout 3000; fastcgi_read_timeout 3000; fastcgi_buffer_size 256k; fastcgi_buffers 8 256k; fastcgi_busy_buffers_size 256k; fastcgi_temp_file_write_size 256k; fastcgi_intercept_errors on; client_header_timeout 600s; client_body_timeout 600s; client_max_body_size 100m; client_body_buffer_size 256k; gzip on; gzip_min_length 1k; gzip_buffers 4 16k; gzip_http_version 1.1; gzip_comp_level 9; gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/x-httpd-php; gzip_vary on; include vhosts/*.conf; }
ulimit -n 65535 mkdir vhosts && cd vhosts vi 8080.conf
将配置改为：
server { listen 8080; server_name localhost; index index.html index.php index.htm; root /var/www/html; access_log /usr/local/nginx/logs/8080-access.log main; error_log /usr/local/nginx/logs/8080-error.log; location / { proxy_pass http://192.168.71.224:8080; proxy_redirect off ; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header REMOTE-HOST $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_connect_timeout 300; #跟后端服务器连接超时时间，发起握手等候响应时间 proxy_send_timeout 300; #后端服务器回传时间，就是在规定时间内后端服务器必须传完所有数据 proxy_read_timeout 600; #连接成功后等待后端服务器的响应时间，已经进入后端的排队之中等候处理 proxy_buffer_size 256k; #代理请求缓冲区,会保存用户的头信息以供nginx进行处理 proxy_buffers 4 256k; #同上，告诉nginx保存单个用几个buffer最大用多少空间 proxy_busy_buffers_size 256k; #如果系统很忙时候可以申请最大的proxy_buffers proxy_temp_file_write_size 256k; #proxy缓存临时文件的大小 proxy_next_upstream error timeout invalid_header http_500 http_503 http_404; proxy_max_temp_file_size 128m; } }
server { listen 8088; server_name localhost; index index.html index.php index.htm; root /var/www/html; access_log /usr/local/nginx/logs/8088-access.log main; error_log /usr/local/nginx/logs/8088-error.log; location / { proxy_pass http://192.168.71.226:8088; proxy_redirect off ; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header REMOTE-HOST $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_connect_timeout 300; proxy_send_timeout 300; proxy_read_timeout 600; proxy_buffer_size 256k; proxy_buffers 4 256k; proxy_busy_buffers_size 256k; proxy_temp_file_write_size 256k; proxy_next_upstream error timeout invalid_header http_500 http_503 http_404; proxy_max_temp_file_size 128m; } }
server { listen 8090; server_name localhost; index index.html index.php index.htm; root /var/www/html; access_log /usr/local/nginx/logs/8090-access.log main; error_log /usr/local/nginx/logs/8090-error.log; location /ios/ { #这种情况，这里一定要匹配的是/ios/，不能是/ios proxy_pass http://192.168.71.224:8090; #一定要保证192.168.1.102机器8090端口站点目录下有ios目录！否则访问会报错404！ proxy_redirect off ; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header REMOTE-HOST $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_connect_timeout 300; proxy_send_timeout 300; proxy_read_timeout 600; proxy_buffer_size 256k; proxy_buffers 4 256k; proxy_busy_buffers_size 256k; proxy_temp_file_write_size 256k; proxy_next_upstream error timeout invalid_header http_500 http_503 http_404; proxy_max_temp_file_size 128m; } }
upstream lb { server 192.168.71.224:80 max_fails=3 fail_timeout=30s; #max_fails = 3 为允许失败的次数，默认值为1 server 192.168.71.226:80 max_fails=3 fail_timeout=30s; #fail_timeout = 30s 当max_fails次失败后，暂停将请求分发到该后端服务器的时间 } server { listen 80; server_name localhost; index index.html index.php index.htm; root /var/www/html; access_log /usr/local/nginx/logs/80-access.log main; error_log /usr/local/nginx/logs/80-error.log; location / { proxy_pass http://lb; proxy_redirect off ; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header REMOTE-HOST $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_connect_timeout 300; proxy_send_timeout 300; proxy_read_timeout 600; proxy_buffer_size 256k; proxy_buffers 4 256k; proxy_busy_buffers_size 256k; proxy_temp_file_write_size 256k; proxy_next_upstream error timeout invalid_header http_500 http_503 http_404; proxy_max_temp_file_size 128m; } }
启动Nginx：
启动nginx： /opt/nginx/sbin/nginx -t 检查配置是否正确 #如果报缺少某个日志文件，创建目录及文件就可以 nginx: the configuration file /opt/nginx/conf/nginx.conf syntax is ok nginx: configuration file /opt/nginx/conf/nginx.conf test is successful /opt/nginx/sbin/nginx 启动nginx
3、机器B配置：
cd /opt/nginx/conf && cp nginx.conf nginx.conf.bak
vi nginx.conf
将配置改为：
user www; worker_processes 2; events { worker_connections 65535; } http { include mime.types; default_type application/octet-stream; charset utf-8; log_format main '$http_x_forwarded_for $remote_addr $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_cookie" $host $request_time'; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; fastcgi_connect_timeout 3000; fastcgi_send_timeout 3000; fastcgi_read_timeout 3000; fastcgi_buffer_size 256k; fastcgi_buffers 8 256k; fastcgi_busy_buffers_size 256k; fastcgi_temp_file_write_size 256k; fastcgi_intercept_errors on; client_header_timeout 600s; client_body_timeout 600s; client_max_body_size 100m; client_body_buffer_size 256k; gzip on; gzip_min_length 1k; gzip_buffers 4 16k; gzip_http_version 1.1; gzip_comp_level 9; gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/x-httpd-php; gzip_vary on; include vhosts/*.conf; }
ulimit -n 65535 mkdir vhosts && cd vhosts vi 8080.conf
将配置改为：
server { listen 8080; server_name localhost; index index.html index.php index.htm; access_log /usr/local/nginx/logs/8080-access.log main; error_log /usr/local/nginx/logs/8080-error.log; location ~ / { root /var/www/html/8080; index index.html index.php index.htm; } }
server { listen 8090; server_name localhost; index index.html index.php index.htm; access_log /usr/local/nginx/logs/8090-access.log main; error_log /usr/local/nginx/logs/8090-error.log; location ~ / { root /var/www/html/8090; #针对上面匹配ios的path代理，要保证站点目录/var/www/html/8080下有ios目录存在 index index.html index.php index.htm; } }
server { listen 80; server_name localhost; index index.html index.php index.htm; access_log /usr/local/nginx/logs/80-access.log main; error_log /usr/local/nginx/logs/80-error.log; location ~ / { root /var/www/html; index index.html index.php index.htm; } }
启动nginx： /opt/nginx/sbin/nginx -t 检查配置是否正确 #如果报缺少某个日志文件，创建目录及文件就可以 nginx: the configuration file /opt/nginx/conf/nginx.conf syntax is ok nginx: configuration file /opt/nginx/conf/nginx.conf test is successful /opt/nginx/sbin/nginx 启动nginx
4、机器C配置：
cd /opt/nginx/conf && cp nginx.conf nginx.conf.bak
vi nginx.conf
将配置改为：
user www; worker_processes 2; events { worker_connections 65535; } http { include mime.types; default_type application/octet-stream; charset utf-8; log_format main '$http_x_forwarded_for $remote_addr $remote_user [$time_local] "$request" ' '$status $body_bytes_sent "$http_referer" ' '"$http_user_agent" "$http_cookie" $host $request_time'; sendfile on; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65; fastcgi_connect_timeout 3000; fastcgi_send_timeout 3000; fastcgi_read_timeout 3000; fastcgi_buffer_size 256k; fastcgi_buffers 8 256k; fastcgi_busy_buffers_size 256k; fastcgi_temp_file_write_size 256k; fastcgi_intercept_errors on; client_header_timeout 600s; client_body_timeout 600s; client_max_body_size 100m; client_body_buffer_size 256k; gzip on; gzip_min_length 1k; gzip_buffers 4 16k; gzip_http_version 1.1; gzip_comp_level 9; gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/x-httpd-php; gzip_vary on; include vhosts/*.conf; }
ulimit -n 65535 mkdir vhosts && cd vhosts vi 8080.conf
将配置改为：
server { listen 8088; server_name localhost; index index.html index.php index.htm; access_log /usr/local/nginx/logs/8088-access.log main; error_log /usr/local/nginx/logs/8088-error.log; location ~ / { root /var/www/html/8088; index index.html index.php index.htm; } }
server { listen 80; server_name localhost; index index.html index.php index.htm; access_log /usr/local/nginx/logs/80-access.log main; error_log /usr/local/nginx/logs/80-error.log; location ~ / { root /var/www/html/; index index.html index.php index.htm; } }
启动nginx： /opt/nginx/sbin/nginx -t 检查配置是否正确 #如果报缺少某个日志文件，创建目录及文件就可以 nginx: the configuration file /opt/nginx/conf/nginx.conf syntax is ok nginx: configuration file /opt/nginx/conf/nginx.conf test is successful /opt/nginx/sbin/nginx 启动nginx
5、创建访问目录：
机器B的目录结构为：
[root@localhost var]# tree www/
www/
└── html
├── 8080
│ └── index.html
├── 8090
│ ├── index.html
│ └── ios
│ └── index.html
└── index.html
echo '192.168.71.224:/var/www/html/' >> index.html mkdir -p /var/www/html/8080 echo '192.168.71.224:/var/www/html/8080' >> /var/www/html/8080/index.html mkdir -p /var/www/html/8090 echo '192.168.71.224/var/www/html/8090' >> /var/www/html/8090/index.html mkdir -p /var/www/html/ios echo 'http://192.168.71.224:8090/ios/' >> /var/www/html/8090/ios/index.html chown www:www -R /var/www/html
机器C的目录结构为： [root@localhost var]# tree www/ www/ └── html ├── 8088 │ └── index.html └── index.html mkdir -p /var/www/html/8088 echo '192.168.71.226:/var/www/html' >> index.html echo '192.168.71.226:/var/www/html/8088/' >> /var/www/html/8080/index.html
chown www:www -R /var/www/html
6、验证：
1、访问http://192.168.71.223/显示的是：192.168.71.224:/var/www/html/，再刷新变为：192.168.71.226:/var/www/html
2、访问http://192.168.71.223:8080/显示的是：192.168.71.224:/var/www/html/8080
3、访问http://192.168.71.223:8088/显示的是：192.168.71.226:/var/www/html/8088/
4、访问http://192.168.71.223:8090/ios/显示的是：http://192.168.71.224:8090/ios/
参考：http://www.cnblogs.com/kevingrace/p/5839698.html