# linux下使用nginx反向代理搭建负载均衡
##1、本地虚拟机搭建
1、在本地搭建三台虚拟机配置分别如下：
~~~
server {
listen 81;
server_name 127.0.0.1;
index index.html index.htm index.php;
root /home/wwwroot/hlsc1/;
#access_log /home/wwwroot/pigcms/logs/pigaccess.log;
rewrite_log on;
#error_log /home/wwwroot/pigcms/logs/error.log debug;
#access_log /home/wwwroot/pigcms/logs/pigaccess.log;
location ~ .*\.(php|php5)?$
{
#fastcgi_pass 127.0.0.1:9000;
#fastcgi_index index.php;
#include fastcgi.conf;
include enable-php.conf;
}
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
{
expires 30d;
}
location ~ .*\.(js|css)?$
{
expires 1h;
}
#access_log /home/wwwroot/pigcms/logs/default.log;
}
~~~
~~~
server {
listen 82;
server_name 127.0.0.1;
index index.html index.htm index.php;
root /home/wwwroot/hlsc2/;
#access_log /home/wwwroot/pigcms/logs/pigaccess.log;
rewrite_log on;
#error_log /home/wwwroot/pigcms/logs/error.log debug;
#access_log /home/wwwroot/pigcms/logs/pigaccess.log;
location ~ .*\.(php|php5)?$
{
#fastcgi_pass 127.0.0.1:9000;
#fastcgi_index index.php;
#include fastcgi.conf;
include enable-php.conf;
}
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
{
expires 30d;
}
location ~ .*\.(js|css)?$
{
expires 1h;
}
#access_log /home/wwwroot/pigcms/logs/default.log;
}
~~~
##配置负载均衡的配置参数
`touch fzjh.conf`
加入如下代码
~~~
user www www;# 用户 用户组
worker_processes 4;#开启的进程 一般是cpu的一倍或者两倍
events{
worker_connections 1024; #最大链接数
}
http{
upstream mypro #此处是负载均衡的服务器集群的地址列表
{
#ip_hash; #这里有三个参数
#ip_hash按照ip的哈希值分配服务器 这样解决了 session的问题
#fair（第三方） 按后端服务器的响应时间来分配请求，响应时间短的优先分配
#url_hash（第三方）按访问url的hash结果来分配请求，使每个url定向到同一个后端服务器，后端服务器为缓存时比较有效。
server 127.0.0.1:80 weight=2;
server 127.0.0.1:81 weight=2;
server 127.0.0.1:82 weight=2;
}
server #提供反向代理的服务监听
{
listen 8080;
location /{
proxy_pass http://mypro;
}
}
}
~~~
##加载配置参数
`/usr/local/nginx/sbin/nginx -c /usr/local/nginx/conf/fzjh.conf`
~~~
killall -9 nginx #杀死nginx的所有进程
service nginx start #启动nginx进程
~~~
或者跟随服务器启动如下代码
~~~
user www www;
worker_processes auto;
error_log /home/wwwlogs/nginx_error.log crit;
pid /usr/local/nginx/logs/nginx.pid;
#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 51200;
events
{
use epoll;
worker_connections 51200;
multi_accept on;
}
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 50m;
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 256k;
gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.1;
gzip_comp_level 2;
gzip_types text/plain application/javascript application/x-javascript text/javascript text/css application/xml application/xml+rss;
gzip_vary on;
gzip_proxied expired no-cache no-store private auth;
gzip_disable "MSIE [1-6]\.";
#limit_conn_zone $binary_remote_addr zone=perip:10m;
##If enable limit_conn_zone,add "limit_conn perip 10;" to server section.
server_tokens off;
#log format
log_format access '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" $http_x_forwarded_for';
access_log off;
upstream mypro #
{
#ip_hash;
server 127.0.0.1:80 weight=2;
server 127.0.0.1:81 weight=2;
server 127.0.0.1:82 weight=2;
}
server
{
#listen 443 default_server;
listen 80;
server_name 127.0.0.1;
index index.html index.htm index.php;
root /home/wwwroot/default;
#error_page 404 /404.html;
include enable-php.conf;
location /nginx_status
{
stub_status on;
access_log off;
}
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
{
expires 30d;
}
location ~ .*\.(js|css)?$
{
expires 12h;
}
location ~ /\.
{
deny all;
}
#ssl on;
#ssl_certificate /usr/local/nginx/conf/server.crt;
#ssl_certificate_key /usr/local/nginx/conf/server.key;
access_log /home/wwwlogs/access.log access;
}
server
{
listen 8080;
location /{
proxy_pass http://mypro;
}
}
include vhost/*.conf;
}
~~~
##参考文章
http://www.server110.com/nginx/201403/7113.html
