使用nginx+keepalived实现高性能集群

来源：互联网发布：中国大学生在线软件编辑：程序博客网时间：2024/05/18 02:50

搭建环境概述：

拓扑图：不知怎么的图片今天发不了啊！如果有需要的可以联系我。

各个应该功能描述：这里使用nginx作负载均衡和web代理，用keepalived做双机互备

nginx_MASTER：192.168.1.100

nginx_BACKUP：192.168.1.101

VIP：192.168.1.118

web1：192.168.1.131

web2：192.168.1.132

这里主要讲解集群和主从备份配置，对于web服务器和数据库配置略过，如有需要帮助的可以给我留言，或联系我都可以。

<多话不说，直接来操作流程，如有疑问可以直接联系我qq:448987046>

一、nginx安装配置（两台服务器完全一样）

1、nginx安装（分别在两台服务器上执行以下操作）

# wget http://nginx.org/download/nginx-1.2.0.tar.gz

# tar -zxvf nginx-1.2.0.tar.gz

# cd nginx-1.2.0

# ./configure --prefix=/usr/local/nginx

# make && make install

注意：安装过程中可能需要安装一些其他的库（如：pcre），按照他的提示安装就行了

2、nginx配置（两台服务器配置一样）

nginx配置文件在 /usr/local/nginx/conf/nginx.conf，下面是nginx完整配置

user nobody nobody;
worker_processes 1;

pid /usr/local/nginx/logs/nginx.pid;
worker_rlimit_nofile 51200;

events
{
use epoll;
worker_connections 51200;
}

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;
#include /usr/local/nginx/conf/proxy.conf;

upstream backend
{
ip_hash;
server 192.168.1.131:8080;
server 192.168.1.132:8080;
}

server {
listen 1111;
server_name localhost;
location / {
index index.html;
proxy_pass http://backend;
proxy_redirect off;
proxy_set_header Host $host:1111;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
client_max_body_size 100m;
client_body_buffer_size 128k;
proxy_connect_timeout 10;
proxy_send_timeout 90;
proxy_read_timeout 90;
proxy_buffer_size 4k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
}

#location /nginx {
#access_log on;
#auth_basic "NginxStatus";
#auth_basic_user_file /usr/local/nginx/htpasswd;
#}

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 /var/log/access.log access;
}
}

附带nginx下载地址http://nginx.org/en/download.html，你可以在这里找到合适你环境内nginx版本

二、keepalived安装配置

1、keepalived安装（两台服务器安装过程一样）

安装keepalived之前确保i的openssl正确安装，同时需要ipvsadm支持

# wget http://www.keepalived.org/software/keepalived-1.2.2.tar.gz

# ./configure --prefix=/usr/local/keepalived

# make && make install

# cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

# mkdir /etc/keepalived

# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/

这是安装就完成了，可以使用下面命了启动

# service keepalived start 或 # /etc/init.d/keepalived start

2、keepalived配置（两台服务器配置略有不同，一台主服务器，一台从服务器）

a、主服务器配置

! Configuration File for keepalived

!nginx 监控脚本
vrrp_script chk_http_port {
script "/usr/local/keepalived/nginx_pid.sh"
interval 2
weight 2
}

vrrp_instance VI_INET1 {
state MASTER
interface eth0
virtual_router_id 53
priority 200
advert_int 1
authentication {
auth_type pass
auth_pass yourpass
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.1.118
}
}

b、从服务器配置

! Configuration File for keepalived

!nginx 监控脚本
vrrp_script chk_http_port {
script "/usr/local/keepalived/nginx_pid.sh"
interval 2
weight 2
}

vrrp_instance VI_INET1 {
state BACKUP
interface eth0
virtual_router_id 53
priority 199
advert_int 1
authentication {
auth_type pass
auth_pass yourpass
}
track_script {
chk_http_port
}
virtual_ipaddress {
192.168.1.118
}
}

c、最后还有一个监听脚本配置 /usr/local/keepalived/nginx_pid.sh （两台服务器配置一样）

# vim /usr/local/keepalived/nginx_pid.sh 监听脚本内容如下:

#!/bin/bash
# varsion 0.0.2

A=`ps -C nginx --no-header |wc -l` ## 查看是否有 nginx进程把值赋给变量A
if [ $A -eq 0 ];then ## 如果没有进程值得为零
/usr/local/nginx/sbin/nginx
sleep 3
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
service keepalived stop ## 则结束 keepalived 进程
fi
fi

至此，我们的安装和配置过程，全部完成，剩下的就只是测试验证了。

测试验证可以参考此文：http://deidara.blog.51cto.com/400447/302402

本文参考文章：http://deidara.blog.51cto.com/400447/302402

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