nginx+lvs+keepalived安装

安装nginx

配置文件和之前的一样

user nobody nobody; #定义Nginx运行的用户和用户组

worker_processes 4; #nginx进程数，建议设置为等于CPU总核心数。

worker_rlimit_nofile 1024; #一个nginx进程打开的最多文件描述符数目，所以建议与ulimit -n的值保持一致。

pid logs/nginx.pid; #进程文件

#工作模式及连接数上限

events {

worker_connections 1024;#单个进程最大连接数（最大连接数=连接数*进程数）

}

#设定http服务器，利用它的反向代理功能提供负载均衡支持

http {

include mime.types;#文件扩展名与文件类型映射表

default_type application/octet-stream;#默认文件类型

#设定负载均衡的服务器列表

upstream tomcatxxxcom {

server 192.168.56.200:8080;

server 192.168.56.201:8080;

}

#设定日志格式

log_format www_xy_com '$remote_addr - $remote_user [$time_local] "$request" '

'$status $body_bytes_sent "$http_referer" '

'"$http_user_agent" "$http_x_forwarded_for"';

sendfile on;#开启高效文件传输模式，sendfile指令指定nginx是否调用sendfile函数来输出文件，对于普通应用设为 on，如果用来进行下载等应用磁盘IO重负载应用，可设置为off，以平衡磁盘与网络I/O处理速度，降低系统的负载。注意：如果图片显示不正常把这个改成off。

keepalive_timeout 65; #长连接超时时间，单位是秒

#gzip on;

#设定虚拟主机，默认为监听80端口

server {

listen 80;

server_name tomcat.xxx.com;#域名可以有多个，用空格隔开

#charset koi8-r;

#设定本虚拟主机的访问日志

access_log /data/logs/access.log www_xy_com;

#对 "/" 启用反向代理

location / {

proxy_pass http://tomcatxxxcom;

proxy_set_header Host $host;

proxy_set_header X-Real-IP $remote_addr;

proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

}

#error_page 500 502 503 504 /50x.html;

location = /50x.html {

root html;

}

安装lvs

lvs-dr.sh:和之前对比，变化之处就是vip和转发的端口。

#!/bin/bash

#description:start lvs server

echo "1" >/proc/sys/net/ipv4/ip_forward

WEB1=192.168.56.200

WEB2=192.168.56.201

VIP1=192.168.56.90

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

case "$1" in

start)

echo "start LVS of directorServer"

#set the Virtual address and sysctl parameter

/sbin/ifconfig eth1:0 $VIP1 broadcast $VIP1 netmask 255.255.255.255 up

#clear ipvs table

/sbin/ipvsadm -C

#set LVS

#web apache or tomcat

/sbin/ipvsadm -A -t $VIP1:80 -s rr

/sbin/ipvsadm -a -t $VIP1:80 -r $WEB1:80 -g

/sbin/ipvsadm -a -t $VIP1:80 -r $WEB2:80 -g

#run LVS

/sbin/ipvsadm

;;

stop)

echo "close LVS directorserver"

echo "0" >/proc/sys/net/ipv4/ip_forward

/sbin/ipvsadm -C

/sbin/ipvsadm -Z

;;

*)

echo "usage:$0 {start|stop}"

exit 1

esac

lvs-rs.sh：与之前的不同在于修改了vip

#!/bin/sh

#description start realserver

#chkconfig 235 26 26

VIP1=192.168.56.90

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

case "$1" in

start)

echo "start LVS of realserver"

/sbin/ifconfig lo:0 $VIP1 broadcast $VIP1 netmask 255.255.255.255 up

echo "1" >/proc/sys/net/ipv4/conf/lo/arp_ignore

echo "2" >/proc/sys/net/ipv4/conf/lo/arp_announce

echo "1" >/proc/sys/net/ipv4/conf/all/arp_ignore

echo "2" >/proc/sys/net/ipv4/conf/all/arp_announce

;;

stop)

/sbin/ifconfig lo:0 down

echo "close lvs dirctorserver"

echo "0" >/proc/sys/net/ipv4/conf/lo/arp_ignore

echo "0" >/proc/sys/net/ipv4/conf/lo/arp_announce

echo "0" >/proc/sys/net/ipv4/conf/all/arp_ignore

echo "0" >/proc/sys/net/ipv4/conf/all/arp_announce

;;

*)

echo "usage:$0{start|stop}"

exit 1

esac

安装keepalived

注意：在用keepalived做tomcat和nginx的热备时，需要加入realserver的配置。但是做lvs的热备则不需要配置realserver，因为keepalived有lvs的配置参数。

backup

! Configuration File for keepalived

global_defs {

notification_email {

#acassen@firewall.loc

#failover@firewall.loc

#sysadmin@firewall.loc

}

notification_email_from Alexandre.Cassen@firewall.loc

#smtp_server 192.168.200.1

#smtp_connect_timeout 30

router_id LVS_DEVEL

}

vrrp_instance VI_1 {

state BACKUP

interface eth1

lvs_sync_daemon_inteface eth1

virtual_router_id 51

priority 100

nopreempt

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}

virtual_ipaddress {

192.168.56.90

}

virtual_server 192.168.56.90 80 {

delay_loop 6

lb_algo rr

lb_kind DR

#nat_mask 255.255.255.0

persistence_timeout 1

protocol TCP

}

master