nginx搭建负载均衡

用户1499526

发布于 2019-07-15 17:55:46

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发布于 2019-07-15 17:55:46

1.准备依赖包

yum -y install gcc pcre-devel zlib-devel openssl-devel

2.安装nginx

wget http://nginx.org/download/nginx-1.2.4.tar.gz

3.安装和make

tar zxvf nginx-1.2.4.tar.gz

cd nginx-1.2.4

./configure --with-http_stub_status_module

make && make install

4.加入服务启动

echo "/usr/local/nginx/sbin/nginx" >> /etc/rc.local

5.配置nginx

配置/usr/local/nginx/conf/nginx.conf的http，配置vhost虚拟主机目录，然后配置vhost下的比如LB.conf文件。

其中: 多域名指向是通过虚拟主机（配置http下面的server）实现; 同一域名的不同虚拟目录通过每个server下面的不同location实现; 到后端的服务器在vhost/LB.conf下面配置upstream,然后在server或location中通过proxy_pass引用。

[root@master-node ~]# vim /usr/local/nginx/conf/nginx.conf
user  www;
worker_processes  8;
 
#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;
 
#pid        logs/nginx.pid;
 
 
events {
    worker_connections  65535;
}
 
 
http {
    include       mime.types;
    default_type  application/octet-stream;
    charset utf-8;
       
    ######
    ## set access log format
    ######
    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';
 
    #######
    ## http setting
    #######
    sendfile       on;
    tcp_nopush     on;
    tcp_nodelay    on;
    keepalive_timeout  65;
    proxy_cache_path /var/www/cache levels=1:2 keys_zone=mycache:20m max_size=2048m inactive=60m;
    proxy_temp_path /var/www/cache/tmp;
 
    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 50m;
    client_max_body_size 100m;               #允许客户端请求的最大单个文件字节数
    client_body_buffer_size 256k;            #缓冲区代理缓冲请求的最大字节数，可以理解为先保存到本地再传给用户
 
    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;
 
    ## includes vhosts
    include vhosts/*.conf;
}

配置vhosts

[root@master-node ~]# mkdir /usr/local/nginx/conf/vhosts
[root@master-node ~]# mkdir /var/www/cache
[root@master-node ~]# ulimit 65535

[root@master-node ~]# vim /usr/local/nginx/conf/vhosts/LB.conf
upstream LB-WWW {
      ip_hash;
      server 192.168.1.101:80 max_fails=3 fail_timeout=30s;     #max_fails = 3 为允许失败的次数，默认值为1
      server 192.168.1.102:80 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 192.168.1.118:80 max_fails=3 fail_timeout=30s;
    }
    
upstream LB-OA {
      ip_hash;
      server 192.168.1.101:8080 max_fails=3 fail_timeout=30s;
      server 192.168.1.102:8080 max_fails=3 fail_timeout=30s;
}
          
  server {
      listen      80;
      server_name dev.wangshibo.com;
    
      access_log  /usr/local/nginx/logs/dev-access.log main;
      error_log  /usr/local/nginx/logs/dev-error.log;
    
      location /svn {
         proxy_pass http://192.168.1.108/svn/;
         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;
         proxy_cache mycache;                                
         proxy_cache_valid 200 302 60m;                      
         proxy_cache_valid 404 1m;
       }
    
      location /submin {
         proxy_pass http://192.168.1.108/submin/;
         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;
         proxy_cache mycache;        
         proxy_cache_valid 200 302 60m;
         proxy_cache_valid 404 1m;
        }
    }
    
server {
     listen       80;
     server_name  www.wangshibo.com;
  
      access_log  /usr/local/nginx/logs/www-access.log main;
      error_log  /usr/local/nginx/logs/www-error.log;
  
     location / {
         proxy_pass http://LB-WWW;
         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;
         proxy_cache mycache;                                
         proxy_cache_valid 200 302 60m;                      
         proxy_cache_valid 404 1m;
        }
}
   
 server {
       listen       80;
       server_name  oa.wangshibo.com;
  
      access_log  /usr/local/nginx/logs/oa-access.log main;
      error_log  /usr/local/nginx/logs/oa-error.log;
  
       location / {
         proxy_pass http://LB-OA;
         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;
         proxy_cache mycache;                                
         proxy_cache_valid 200 302 60m;                      
         proxy_cache_valid 404 1m;
        }
}

6.nginx 开机启动配置

chkconfig --add nginx //添加系统服务
chkconfig --level 345 nginx on //设置开机启动,启动级别
chkconfig --list nginx //查看开机启动配置信息

vim /etc/init.d/nginx

#!/bin/sh

#

# nginx - this script starts and stops the nginx daemin

#

# chkconfig: - 85 15

# description: Nginx is an HTTP(S) server, HTTP(S) reverse

# proxy and IMAP/POP3 proxy server

# processname: nginx

# config: /usr/local/nginx/conf/nginx.conf

# pidfile: /usr/local/nginx/logs/nginx.pid

# Source function library.

. /etc/rc.d/init.d/functions

# Source networking configuration.

. /etc/sysconfig/network

# Check that networking is up.

[ "$NETWORKING" = "no" ] && exit 0

nginx="/usr/local/nginx/sbin/nginx"

prog=$(basename $nginx)

NGINX_CONF_FILE="/usr/local/nginx/conf/nginx.conf"

lockfile=/var/lock/subsys/nginx

start() {

[ -x $nginx ] || exit 5

[ -f $NGINX_CONF_FILE ] || exit 6

echo -n $"Starting $prog: "

daemon $nginx -c $NGINX_CONF_FILE

retval=$?

echo

[ $retval -eq 0 ] && touch $lockfile

return $retval

}

stop() {

echo -n $"Stopping $prog: "

killproc $prog -QUIT

retval=$?

echo

[ $retval -eq 0 ] && rm -f $lockfile

return $retval

}

restart() {

configtest || return $?

stop

start

}

reload() {

configtest || return $?

echo -n $"Reloading $prog: "

killproc $nginx -HUP

RETVAL=$?

echo

}

force_reload() {

restart

}

configtest() {

$nginx -t -c $NGINX_CONF_FILE

}

rh_status() {

status $prog

}

rh_status_q() {

rh_status >/dev/null 2>&1

}

case "$1" in

start)

rh_status_q && exit 0

$1

;;

stop)

rh_status_q || exit 0

$1

;;

restart|configtest)

$1

;;

reload)

rh_status_q || exit 7

$1

;;

force-reload)

force_reload

;;

status)

rh_status

;;

condrestart|try-restart)

rh_status_q || exit 0

;;

*)

echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"

exit 2

esac

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